Changeset 388


Ignore:
Timestamp:
Nov 14, 2008, 3:52:03 PM (11 years ago)
Author:
julian.reschke@…
Message:

merge in changes from -latest

Location:
draft-ietf-httpbis/latest-roy
Files:
2 edited

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  • draft-ietf-httpbis/latest-roy/p1-messaging.html

    r387 r388  
    377377      <link rel="Chapter" href="#rfc.section.12" title="12 References">
    378378      <link rel="Appendix" title="A Tolerant Applications" href="#rfc.section.A">
    379       <link rel="Appendix" title="B Conversion of Date Formats" href="#rfc.section.B">
    380       <link rel="Appendix" title="C Compatibility with Previous Versions" href="#rfc.section.C">
    381       <link rel="Appendix" title="D Terminology" href="#rfc.section.D">
    382       <link rel="Appendix" title="E Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.E">
     379      <link rel="Appendix" title="B Compatibility with Previous Versions" href="#rfc.section.B">
     380      <link rel="Appendix" title="C Terminology" href="#rfc.section.C">
     381      <link rel="Appendix" title="D Change Log (to be removed by RFC Editor before publication)" href="#rfc.section.D">
    383382      <meta name="generator" content="http://greenbytes.de/tech/webdav/rfc2629.xslt, Revision 1.400, 2008-10-10 14:04:14, XSLT vendor: SAXON 8.9 from Saxonica http://www.saxonica.com/">
    384383      <link rel="schema.DC" href="http://purl.org/dc/elements/1.1/">
     
    477476         <tr>
    478477            <td class="header left"></td>
    479             <td class="header right">November 14, 2008</td>
     478            <td class="header right">November 15, 2008</td>
    480479         </tr>
    481480      </table>
     
    510509         list is at &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/report/11">http://tools.ietf.org/wg/httpbis/trac/report/11</a>&gt; and related documents (including fancy diffs) can be found at &lt;<a href="http://tools.ietf.org/wg/httpbis/">http://tools.ietf.org/wg/httpbis/</a>&gt;.
    511510      </p> 
    512       <p>The changes in this draft are summarized in <a href="#changes.since.04" title="Since draft-ietf-httpbis-p1-messaging-04">Appendix&nbsp;E.6</a>.
     511      <p>The changes in this draft are summarized in <a href="#changes.since.05" title="Since draft-ietf-httpbis-p1-messaging-05">Appendix&nbsp;D.7</a>.
    513512      </p>
    514513      <hr class="noprint">
     
    643642         <li class="tocline0"><a href="#rfc.authors">Authors' Addresses</a></li>
    644643         <li class="tocline0">A.&nbsp;&nbsp;&nbsp;<a href="#tolerant.applications">Tolerant Applications</a></li>
    645          <li class="tocline0">B.&nbsp;&nbsp;&nbsp;<a href="#conversion.of.date.formats">Conversion of Date Formats</a></li>
    646          <li class="tocline0">C.&nbsp;&nbsp;&nbsp;<a href="#compatibility">Compatibility with Previous Versions</a><ul class="toc">
    647                <li class="tocline1">C.1&nbsp;&nbsp;&nbsp;<a href="#changes.from.1.0">Changes from HTTP/1.0</a><ul class="toc">
    648                      <li class="tocline1">C.1.1&nbsp;&nbsp;&nbsp;<a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses">Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses</a></li>
     644         <li class="tocline0">B.&nbsp;&nbsp;&nbsp;<a href="#compatibility">Compatibility with Previous Versions</a><ul class="toc">
     645               <li class="tocline1">B.1&nbsp;&nbsp;&nbsp;<a href="#changes.from.1.0">Changes from HTTP/1.0</a><ul class="toc">
     646                     <li class="tocline1">B.1.1&nbsp;&nbsp;&nbsp;<a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses">Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses</a></li>
    649647                  </ul>
    650648               </li>
    651                <li class="tocline1">C.2&nbsp;&nbsp;&nbsp;<a href="#compatibility.with.http.1.0.persistent.connections">Compatibility with HTTP/1.0 Persistent Connections</a></li>
    652                <li class="tocline1">C.3&nbsp;&nbsp;&nbsp;<a href="#changes.from.rfc.2068">Changes from RFC 2068</a></li>
    653                <li class="tocline1">C.4&nbsp;&nbsp;&nbsp;<a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li>
     649               <li class="tocline1">B.2&nbsp;&nbsp;&nbsp;<a href="#compatibility.with.http.1.0.persistent.connections">Compatibility with HTTP/1.0 Persistent Connections</a></li>
     650               <li class="tocline1">B.3&nbsp;&nbsp;&nbsp;<a href="#changes.from.rfc.2068">Changes from RFC 2068</a></li>
     651               <li class="tocline1">B.4&nbsp;&nbsp;&nbsp;<a href="#changes.from.rfc.2616">Changes from RFC 2616</a></li>
    654652            </ul>
    655653         </li>
    656          <li class="tocline0">D.&nbsp;&nbsp;&nbsp;<a href="#terminology">Terminology</a></li>
    657          <li class="tocline0">E.&nbsp;&nbsp;&nbsp;<a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul class="toc">
    658                <li class="tocline1">E.1&nbsp;&nbsp;&nbsp;<a href="#rfc.section.E.1">Since RFC2616</a></li>
    659                <li class="tocline1">E.2&nbsp;&nbsp;&nbsp;<a href="#rfc.section.E.2">Since draft-ietf-httpbis-p1-messaging-00</a></li>
    660                <li class="tocline1">E.3&nbsp;&nbsp;&nbsp;<a href="#rfc.section.E.3">Since draft-ietf-httpbis-p1-messaging-01</a></li>
    661                <li class="tocline1">E.4&nbsp;&nbsp;&nbsp;<a href="#changes.since.02">Since draft-ietf-httpbis-p1-messaging-02</a></li>
    662                <li class="tocline1">E.5&nbsp;&nbsp;&nbsp;<a href="#changes.since.03">Since draft-ietf-httpbis-p1-messaging-03</a></li>
    663                <li class="tocline1">E.6&nbsp;&nbsp;&nbsp;<a href="#changes.since.04">Since draft-ietf-httpbis-p1-messaging-04</a></li>
     654         <li class="tocline0">C.&nbsp;&nbsp;&nbsp;<a href="#terminology">Terminology</a></li>
     655         <li class="tocline0">D.&nbsp;&nbsp;&nbsp;<a href="#change.log">Change Log (to be removed by RFC Editor before publication)</a><ul class="toc">
     656               <li class="tocline1">D.1&nbsp;&nbsp;&nbsp;<a href="#rfc.section.D.1">Since RFC2616</a></li>
     657               <li class="tocline1">D.2&nbsp;&nbsp;&nbsp;<a href="#rfc.section.D.2">Since draft-ietf-httpbis-p1-messaging-00</a></li>
     658               <li class="tocline1">D.3&nbsp;&nbsp;&nbsp;<a href="#rfc.section.D.3">Since draft-ietf-httpbis-p1-messaging-01</a></li>
     659               <li class="tocline1">D.4&nbsp;&nbsp;&nbsp;<a href="#changes.since.02">Since draft-ietf-httpbis-p1-messaging-02</a></li>
     660               <li class="tocline1">D.5&nbsp;&nbsp;&nbsp;<a href="#changes.since.03">Since draft-ietf-httpbis-p1-messaging-03</a></li>
     661               <li class="tocline1">D.6&nbsp;&nbsp;&nbsp;<a href="#changes.since.04">Since draft-ietf-httpbis-p1-messaging-04</a></li>
     662               <li class="tocline1">D.7&nbsp;&nbsp;&nbsp;<a href="#changes.since.05">Since draft-ietf-httpbis-p1-messaging-05</a></li>
    664663            </ul>
    665664         </li>
     
    726725      </h4>
    727726      <p id="rfc.section.1.2.1.1.p.1">A construct "#" is defined, similar to "*", for defining lists of elements. The full form is "&lt;n&gt;#&lt;m&gt;element" indicating at
    728          least &lt;n&gt; and at most &lt;m&gt; elements, each separated by one or more commas (",") and <em class="bcp14">OPTIONAL</em> linear white space (LWS). This makes the usual form of lists very easy; a rule such as
    729       </p>
    730       <div id="rfc.figure.u.1"></div><pre class="text"> ( *<a href="#rule.LWS" class="smpl">LWS</a> element *( *<a href="#rule.LWS" class="smpl">LWS</a> "," *<a href="#rule.LWS" class="smpl">LWS</a> element ))</pre><p id="rfc.section.1.2.1.1.p.2">can be shown as </p>
     727         least &lt;n&gt; and at most &lt;m&gt; elements, each separated by one or more commas (",") and <em class="bcp14">OPTIONAL</em> linear white space (OWS). This makes the usual form of lists very easy; a rule such as
     728      </p>
     729      <div id="rfc.figure.u.1"></div><pre class="text"> ( *<a href="#rule.whitespace" class="smpl">OWS</a> element *( *<a href="#rule.whitespace" class="smpl">OWS</a> "," *<a href="#rule.whitespace" class="smpl">OWS</a> element ))</pre><p id="rfc.section.1.2.1.1.p.2">can be shown as </p>
    731730      <div id="rfc.figure.u.2"></div><pre class="text"> 1#element</pre><p id="rfc.section.1.2.1.1.p.3">Wherever this construct is used, null elements are allowed, but do not contribute to the count of elements present. That is,
    732731         "(element), , (element) " is permitted, but counts as only two elements. Therefore, where at least one element is required,
     
    743742      <h3 id="rfc.section.1.2.2"><a href="#rfc.section.1.2.2">1.2.2</a>&nbsp;<a id="basic.rules" href="#basic.rules">Basic Rules</a></h3>
    744743      <div id="rule.CRLF">
    745          <p id="rfc.section.1.2.2.p.1">HTTP/1.1 defines the sequence CRLF as the end-of-line marker for all protocol elements except the entity-body (see <a href="#tolerant.applications" title="Tolerant Applications">Appendix&nbsp;A</a> for tolerant applications). The end-of-line marker within an entity-body is defined by its associated media type, as described
     744         <p id="rfc.section.1.2.2.p.1">  HTTP/1.1 defines the sequence CR LF as the end-of-line marker for all protocol elements except the entity-body (see <a href="#tolerant.applications" title="Tolerant Applications">Appendix&nbsp;A</a> for tolerant applications). The end-of-line marker within an entity-body is defined by its associated media type, as described
    746745            in <a href="p3-payload.html#media.types" title="Media Types">Section 3.3</a> of <a href="#Part3" id="rfc.xref.Part3.2"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>.
    747746         </p>
    748747      </div>
    749748      <div id="rule.LWS">
    750          <p id="rfc.section.1.2.2.p.2">  HTTP/1.1 header field values can be folded onto multiple lines if the continuation line begins with a space or horizontal
    751             tab. All linear white space, including folding, has the same semantics as SP. A recipient <em class="bcp14">MAY</em> replace any linear white space with a single SP before interpreting the field value or forwarding the message downstream.
     749         <p id="rfc.section.1.2.2.p.2">All linear white space (LWS) in header field-values has the same semantics as SP. A recipient <em class="bcp14">MAY</em> replace any such linear white space with a single SP before interpreting the field value or forwarding the message downstream.
    752750         </p>
    753751      </div>
    754       <div id="rfc.figure.u.3"></div><pre class="inline"><span id="rfc.iref.g.14"></span>  <a href="#rule.LWS" class="smpl">LWS</a>            = [<a href="#core.rules" class="smpl">CRLF</a>] 1*( <a href="#core.rules" class="smpl">SP</a> / <a href="#core.rules" class="smpl">HTAB</a> )
     752      <p id="rfc.section.1.2.2.p.3">Historically, HTTP/1.1 header field values allow linear white space folding across multiple lines. However, this specification
     753         deprecates its use; senders <em class="bcp14">MUST NOT</em> produce messages that include LWS folding (i.e., use the obs-fold rule), except within the message/http media type (<a href="#internet.media.type.message.http" title="Internet Media Type message/http">Section&nbsp;9.3.1</a>). Receivers <em class="bcp14">SHOULD</em> still parse folded linear white space.
     754      </p>
     755      <p id="rfc.section.1.2.2.p.4">This specification uses three rules to denote the use of linear white space; BWS ("Bad" White Space), OWS (Optional White
     756         Space), and RWS (Required White Space).
     757      </p>
     758      <p id="rfc.section.1.2.2.p.5">"Bad" white space is allowed by the BNF, but senders <em class="bcp14">SHOULD NOT</em> produce it in messages. Receivers <em class="bcp14">MUST</em> accept it in incoming messages.
     759      </p>
     760      <p id="rfc.section.1.2.2.p.6">Required white space is used when at least one linear white space character is required to separate field tokens. In all such
     761         cases, a single SP character <em class="bcp14">SHOULD</em> be used.
     762      </p>
     763      <div id="rule.whitespace">
     764         <p id="rfc.section.1.2.2.p.7">        </p>
     765      </div>
     766      <div id="rfc.figure.u.3"></div><pre class="inline"><span id="rfc.iref.g.14"></span><span id="rfc.iref.g.15"></span><span id="rfc.iref.g.16"></span>  <a href="#rule.whitespace" class="smpl">OWS</a>            = *( [ obs-fold ] <a href="#core.rules" class="smpl">WSP</a> )
     767                 ; "optional" white space
     768  <a href="#rule.whitespace" class="smpl">RWS</a>            = 1*( [ obs-fold ] <a href="#core.rules" class="smpl">WSP</a> )
     769                 ; "required" white space
     770  <a href="#rule.whitespace" class="smpl">BWS</a>            = <a href="#rule.whitespace" class="smpl">OWS</a>
     771                 ; "bad" white space
     772  <a href="#rule.whitespace" class="smpl">obs-fold</a>       = <a href="#core.rules" class="smpl">CRLF</a>
    755773</pre><div id="rule.TEXT">
    756          <p id="rfc.section.1.2.2.p.4">  The TEXT rule is only used for descriptive field contents and values that are not intended to be interpreted by the message
     774         <p id="rfc.section.1.2.2.p.9">  The TEXT rule is only used for descriptive field contents and values that are not intended to be interpreted by the message
    757775            parser. Words of *TEXT <em class="bcp14">MAY</em> contain characters from character sets other than ISO-8859-1 <a href="#ISO-8859-1" id="rfc.xref.ISO-8859-1.1"><cite title="Information technology -- 8-bit single-byte coded graphic character sets -- Part 1: Latin alphabet No. 1">[ISO-8859-1]</cite></a> only when encoded according to the rules of <a href="#RFC2047" id="rfc.xref.RFC2047.1"><cite title="MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text">[RFC2047]</cite></a>.
    758776         </p>
    759777      </div>
    760       <div id="rfc.figure.u.4"></div><pre class="inline"><span id="rfc.iref.g.15"></span>  <a href="#rule.TEXT" class="smpl">TEXT</a>           = %x20-7E / %x80-FF / <a href="#rule.LWS" class="smpl">LWS</a>
    761                  ; any <a href="#core.rules" class="smpl">OCTET</a> except <a href="#core.rules" class="smpl">CTL</a>s, but including <a href="#rule.LWS" class="smpl">LWS</a>
    762 </pre><p id="rfc.section.1.2.2.p.6">A CRLF is allowed in the definition of TEXT only as part of a header field continuation. It is expected that the folding LWS
     778      <div id="rfc.figure.u.4"></div><pre class="inline"><span id="rfc.iref.g.17"></span>  <a href="#rule.TEXT" class="smpl">TEXT</a>           = %x20-7E / %x80-FF / <a href="#rule.whitespace" class="smpl">OWS</a>
     779                 ; any <a href="#core.rules" class="smpl">OCTET</a> except <a href="#core.rules" class="smpl">CTL</a>s, but including <a href="#rule.whitespace" class="smpl">OWS</a>
     780</pre><p id="rfc.section.1.2.2.p.11">A CRLF is allowed in the definition of TEXT only as part of a header field continuation. It is expected that the folding LWS
    763781         will be replaced with a single SP before interpretation of the TEXT value.
    764782      </p>
    765783      <div id="rule.token.separators">
    766          <p id="rfc.section.1.2.2.p.7">      Many HTTP/1.1 header field values consist of words separated by LWS or special characters. These special characters <em class="bcp14">MUST</em> be in a quoted string to be used within a parameter value (as defined in <a href="#transfer.codings" title="Transfer Codings">Section&nbsp;3.3</a>).
     784         <p id="rfc.section.1.2.2.p.12">    Many HTTP/1.1 header field values consist of words separated by LWS or special characters. These special characters <em class="bcp14">MUST</em> be in a quoted string to be used within a parameter value (as defined in <a href="#transfer.codings" title="Transfer Codings">Section&nbsp;3.3</a>).
    767785         </p>
    768786      </div>
    769       <div id="rfc.figure.u.5"></div><pre class="inline"><span id="rfc.iref.g.16"></span><span id="rfc.iref.g.17"></span><span id="rfc.iref.g.18"></span>  <a href="#rule.token.separators" class="smpl">separators</a>     = "(" / ")" / "&lt;" / "&gt;" / "@"
    770                  / "," / ";" / ":" / "\" / <a href="#core.rules" class="smpl">DQUOTE</a>
    771                  / "/" / "[" / "]" / "?" / "="
    772                  / "{" / "}" / <a href="#core.rules" class="smpl">SP</a> / <a href="#core.rules" class="smpl">HTAB</a>
    773                  
    774   <a href="#rule.token.separators" class="smpl">tchar</a>          = "!" / "#" / "$" / "%" / "&amp;" / "'" / "*"
     787      <div id="rfc.figure.u.5"></div><pre class="inline"><span id="rfc.iref.g.18"></span><span id="rfc.iref.g.19"></span>  <a href="#rule.token.separators" class="smpl">tchar</a>          = "!" / "#" / "$" / "%" / "&amp;" / "'" / "*"
    775788                 / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
    776789                 / <a href="#core.rules" class="smpl">DIGIT</a> / <a href="#core.rules" class="smpl">ALPHA</a>
    777                  ; any <a href="#core.rules" class="smpl">CHAR</a> except <a href="#core.rules" class="smpl">CTL</a>s or <a href="#rule.token.separators" class="smpl">separators</a>
    778790                 
    779791  <a href="#rule.token.separators" class="smpl">token</a>          = 1*<a href="#rule.token.separators" class="smpl">tchar</a>
    780792</pre><div id="rule.comment">
    781          <p id="rfc.section.1.2.2.p.9">    Comments can be included in some HTTP header fields by surrounding the comment text with parentheses. Comments are only allowed
     793         <p id="rfc.section.1.2.2.p.14">    Comments can be included in some HTTP header fields by surrounding the comment text with parentheses. Comments are only allowed
    782794            in fields containing "comment" as part of their field value definition. In all other fields, parentheses are considered part
    783795            of the field value.
    784796         </p>
    785797      </div>
    786       <div id="rfc.figure.u.6"></div><pre class="inline"><span id="rfc.iref.g.19"></span><span id="rfc.iref.g.20"></span>  <a href="#rule.comment" class="smpl">comment</a>        = "(" *( <a href="#rule.comment" class="smpl">ctext</a> / <a href="#rule.quoted-pair" class="smpl">quoted-pair</a> / <a href="#rule.comment" class="smpl">comment</a> ) ")"
     798      <div id="rfc.figure.u.6"></div><pre class="inline"><span id="rfc.iref.g.20"></span><span id="rfc.iref.g.21"></span>  <a href="#rule.comment" class="smpl">comment</a>        = "(" *( <a href="#rule.comment" class="smpl">ctext</a> / <a href="#rule.quoted-pair" class="smpl">quoted-pair</a> / <a href="#rule.comment" class="smpl">comment</a> ) ")"
    787799  <a href="#rule.comment" class="smpl">ctext</a>          = &lt;any <a href="#rule.TEXT" class="smpl">TEXT</a> excluding "(" and ")"&gt;
    788800</pre><div id="rule.quoted-string">
    789          <p id="rfc.section.1.2.2.p.11">    A string of text is parsed as a single word if it is quoted using double-quote marks.</p>
     801         <p id="rfc.section.1.2.2.p.16">    A string of text is parsed as a single word if it is quoted using double-quote marks.</p>
    790802      </div>
    791       <div id="rfc.figure.u.7"></div><pre class="inline"><span id="rfc.iref.g.21"></span><span id="rfc.iref.g.22"></span>  <a href="#rule.quoted-string" class="smpl">quoted-string</a>  = ( <a href="#core.rules" class="smpl">DQUOTE</a> *(<a href="#rule.quoted-string" class="smpl">qdtext</a> / <a href="#rule.quoted-pair" class="smpl">quoted-pair</a> ) <a href="#core.rules" class="smpl">DQUOTE</a> )
     803      <div id="rfc.figure.u.7"></div><pre class="inline"><span id="rfc.iref.g.22"></span><span id="rfc.iref.g.23"></span>  <a href="#rule.quoted-string" class="smpl">quoted-string</a>  = <a href="#core.rules" class="smpl">DQUOTE</a> *(<a href="#rule.quoted-string" class="smpl">qdtext</a> / <a href="#rule.quoted-pair" class="smpl">quoted-pair</a> ) <a href="#core.rules" class="smpl">DQUOTE</a>
    792804  <a href="#rule.quoted-string" class="smpl">qdtext</a>         = &lt;any <a href="#rule.TEXT" class="smpl">TEXT</a> excluding <a href="#core.rules" class="smpl">DQUOTE</a> and "\"&gt;
    793805</pre><div id="rule.quoted-pair">
    794          <p id="rfc.section.1.2.2.p.13">    The backslash character ("\") <em class="bcp14">MAY</em> be used as a single-character quoting mechanism only within quoted-string and comment constructs.
     806         <p id="rfc.section.1.2.2.p.18">    The backslash character ("\") <em class="bcp14">MAY</em> be used as a single-character quoting mechanism only within quoted-string and comment constructs.
    795807         </p>
    796808      </div>
    797       <div id="rfc.figure.u.8"></div><pre class="inline"><span id="rfc.iref.g.23"></span><span id="rfc.iref.g.24"></span>  <a href="#rule.quoted-pair" class="smpl">quoted-text</a>    = %x01-09 /
     809      <div id="rfc.figure.u.8"></div><pre class="inline"><span id="rfc.iref.g.24"></span><span id="rfc.iref.g.25"></span>  <a href="#rule.quoted-pair" class="smpl">quoted-text</a>    = %x01-09 /
    798810                   %x0B-0C /
    799811                   %x0E-FF ; Characters excluding NUL, <a href="#core.rules" class="smpl">CR</a> and <a href="#core.rules" class="smpl">LF</a>
     
    822834         "path-abempty", "path-absolute", "query", and "authority" from <a href="#RFC3986" id="rfc.xref.RFC3986.4"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>. In addition, we define a partial-URI rule for protocol elements that allow a relative URI without a fragment.
    823835      </p>
    824       <div id="rfc.figure.u.12"></div><pre class="inline"><span id="rfc.iref.g.25"></span><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span><span id="rfc.iref.g.28"></span><span id="rfc.iref.g.29"></span><span id="rfc.iref.g.30"></span><span id="rfc.iref.g.31"></span>  <a href="#uri" class="smpl">URI</a>           = &lt;URI, defined in <a href="#RFC3986" id="rfc.xref.RFC3986.5"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-3">Section 3</a>&gt;
     836      <div id="rfc.figure.u.12"></div><pre class="inline"><span id="rfc.iref.g.26"></span><span id="rfc.iref.g.27"></span><span id="rfc.iref.g.28"></span><span id="rfc.iref.g.29"></span><span id="rfc.iref.g.30"></span><span id="rfc.iref.g.31"></span><span id="rfc.iref.g.32"></span>  <a href="#uri" class="smpl">URI</a>           = &lt;URI, defined in <a href="#RFC3986" id="rfc.xref.RFC3986.5"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-3">Section 3</a>&gt;
    825837  <a href="#uri" class="smpl">URI-reference</a> = &lt;URI-reference, defined in <a href="#RFC3986" id="rfc.xref.RFC3986.6"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.1">Section 4.1</a>&gt;
    826838  <a href="#uri" class="smpl">absolute-URI</a>  = &lt;absolute-URI, defined in <a href="#RFC3986" id="rfc.xref.RFC3986.7"><cite title="Uniform Resource Identifier (URI): Generic Syntax">[RFC3986]</cite></a>, <a href="http://tools.ietf.org/html/rfc3986#section-4.3">Section 4.3</a>&gt;
     
    846858         for identifiers using the http or https URI schemes.
    847859      </p>
    848       <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.32"></span>  <a href="#http.uri" class="smpl">http-URI</a> = "http:" "//" <a href="#uri" class="smpl">authority</a> <a href="#uri" class="smpl">path-abempty</a> [ "?" <a href="#uri" class="smpl">query</a> ]
     860      <div id="rfc.figure.u.13"></div><pre class="inline"><span id="rfc.iref.g.33"></span>  <a href="#http.uri" class="smpl">http-URI</a> = "http:" "//" <a href="#uri" class="smpl">authority</a> <a href="#uri" class="smpl">path-abempty</a> [ "?" <a href="#uri" class="smpl">query</a> ]
    849861</pre><p id="rfc.section.2.1.1.p.3">If the port is empty or not given, port 80 is assumed. The semantics are that the identified resource is located at the server
    850862         listening for TCP connections on that port of that host, and the request-target for the resource is path-absolute (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>). The use of IP addresses in URLs <em class="bcp14">SHOULD</em> be avoided whenever possible (see <a href="#RFC1900" id="rfc.xref.RFC1900.1"><cite title="Renumbering Needs Work">[RFC1900]</cite></a>). If the path-absolute is not present in the URL, it <em class="bcp14">MUST</em> be given as "/" when used as a request-target for a resource (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>). If a proxy receives a host name which is not a fully qualified domain name, it <em class="bcp14">MAY</em> add its domain to the host name it received. If a proxy receives a fully qualified domain name, the proxy <em class="bcp14">MUST NOT</em> change the host name.
     
    950962      </p>
    951963      <p id="rfc.section.3.1.p.2">The version of an HTTP message is indicated by an HTTP-Version field in the first line of the message. HTTP-Version is case-sensitive.</p>
    952       <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.33"></span><span id="rfc.iref.g.34"></span>  <a href="#http.version" class="smpl">HTTP-Version</a>   = <a href="#http.version" class="smpl">HTTP-Prot-Name</a> "/" 1*<a href="#core.rules" class="smpl">DIGIT</a> "." 1*<a href="#core.rules" class="smpl">DIGIT</a>
     964      <div id="rfc.figure.u.18"></div><pre class="inline"><span id="rfc.iref.g.34"></span><span id="rfc.iref.g.35"></span>  <a href="#http.version" class="smpl">HTTP-Version</a>   = <a href="#http.version" class="smpl">HTTP-Prot-Name</a> "/" 1*<a href="#core.rules" class="smpl">DIGIT</a> "." 1*<a href="#core.rules" class="smpl">DIGIT</a>
    953965  <a href="#http.version" class="smpl">HTTP-Prot-Name</a> = %x48.54.54.50 ; "HTTP", case-sensitive
    954966</pre><p id="rfc.section.3.1.p.4">Note that the major and minor numbers <em class="bcp14">MUST</em> be treated as separate integers and that each <em class="bcp14">MAY</em> be incremented higher than a single digit. Thus, HTTP/2.4 is a lower version than HTTP/2.13, which in turn is lower than HTTP/12.3.
     
    974986      <h3 id="rfc.section.3.2.1"><a href="#rfc.section.3.2.1">3.2.1</a>&nbsp;<a id="full.date" href="#full.date">Full Date</a></h3>
    975987      <p id="rfc.section.3.2.1.p.1">HTTP applications have historically allowed three different formats for the representation of date/time stamps:</p>
    976       <div id="rfc.figure.u.19"></div><pre class="text">   Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123
     988      <div id="rfc.figure.u.19"></div><pre class="text">   Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 1123
    977989   Sunday, 06-Nov-94 08:49:37 GMT ; obsolete RFC 850 format
    978990   Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format
    979 </pre><p id="rfc.section.3.2.1.p.3">The first format is preferred as an Internet standard and represents a fixed-length subset of that defined by <a href="#RFC1123" id="rfc.xref.RFC1123.1"><cite title="Requirements for Internet Hosts - Application and Support">[RFC1123]</cite></a> (an update to <a href="#RFC822" id="rfc.xref.RFC822.1"><cite title="Standard for the format of ARPA Internet text messages">[RFC822]</cite></a>). The other formats are described here only for compatibility with obsolete implementations. HTTP/1.1 clients and servers
     991</pre><p id="rfc.section.3.2.1.p.3">The first format is preferred as an Internet standard and represents a fixed-length subset of that defined by <a href="#RFC1123" id="rfc.xref.RFC1123.1"><cite title="Requirements for Internet Hosts - Application and Support">[RFC1123]</cite></a>. The other formats are described here only for compatibility with obsolete implementations. HTTP/1.1 clients and servers
    980992         that parse the date value <em class="bcp14">MUST</em> accept all three formats (for compatibility with HTTP/1.0), though they <em class="bcp14">MUST</em> only generate the RFC 1123 format for representing HTTP-date values in header fields. See <a href="#tolerant.applications" title="Tolerant Applications">Appendix&nbsp;A</a> for further information.
    981993      </p>
     
    9891001         time zone, and <em class="bcp14">MUST</em> be assumed when reading the asctime format. HTTP-date is case sensitive and <em class="bcp14">MUST NOT</em> include additional LWS beyond that specifically included as SP in the grammar.
    9901002      </p>
    991       <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.35"></span><span id="rfc.iref.g.36"></span><span id="rfc.iref.g.37"></span><span id="rfc.iref.g.38"></span><span id="rfc.iref.g.39"></span><span id="rfc.iref.g.40"></span><span id="rfc.iref.g.41"></span><span id="rfc.iref.g.42"></span><span id="rfc.iref.g.43"></span><span id="rfc.iref.g.44"></span><span id="rfc.iref.g.45"></span><span id="rfc.iref.g.46"></span>  <a href="#full.date" class="smpl">HTTP-date</a>    = <a href="#full.date" class="smpl">rfc1123-date</a> / <a href="#full.date" class="smpl">obsolete-date</a>
     1003      <div id="rfc.figure.u.20"></div><pre class="inline"><span id="rfc.iref.g.36"></span><span id="rfc.iref.g.37"></span><span id="rfc.iref.g.38"></span><span id="rfc.iref.g.39"></span><span id="rfc.iref.g.40"></span><span id="rfc.iref.g.41"></span><span id="rfc.iref.g.42"></span><span id="rfc.iref.g.43"></span><span id="rfc.iref.g.44"></span><span id="rfc.iref.g.45"></span><span id="rfc.iref.g.46"></span><span id="rfc.iref.g.47"></span>  <a href="#full.date" class="smpl">HTTP-date</a>    = <a href="#full.date" class="smpl">rfc1123-date</a> / <a href="#full.date" class="smpl">obsolete-date</a>
    9921004  <a href="#full.date" class="smpl">obsolete-date</a> = <a href="#full.date" class="smpl">rfc850-date</a> / <a href="#full.date" class="smpl">asctime-date</a>
    9931005  <a href="#full.date" class="smpl">rfc1123-date</a> = <a href="#full.date" class="smpl">wkday</a> "," <a href="#core.rules" class="smpl">SP</a> date1 <a href="#core.rules" class="smpl">SP</a> time <a href="#core.rules" class="smpl">SP</a> GMT
     
    10481060         is a property of the message, not of the original entity.
    10491061      </p>
    1050       <div id="rfc.figure.u.21"></div><pre class="inline"><span id="rfc.iref.g.47"></span><span id="rfc.iref.g.48"></span>  <a href="#transfer.codings" class="smpl">transfer-coding</a>         = "chunked" / <a href="#transfer.codings" class="smpl">transfer-extension</a>
    1051   <a href="#transfer.codings" class="smpl">transfer-extension</a>      = <a href="#rule.token.separators" class="smpl">token</a> *( ";" <a href="#transfer.codings" class="smpl">parameter</a> )
     1062      <div id="rfc.figure.u.21"></div><pre class="inline"><span id="rfc.iref.g.48"></span><span id="rfc.iref.g.49"></span>  <a href="#transfer.codings" class="smpl">transfer-coding</a>         = "chunked" / <a href="#transfer.codings" class="smpl">transfer-extension</a>
     1063  <a href="#transfer.codings" class="smpl">transfer-extension</a>      = <a href="#rule.token.separators" class="smpl">token</a> *( <a href="#rule.whitespace" class="smpl">OWS</a> ";" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#transfer.codings" class="smpl">parameter</a> )
    10521064</pre><div id="rule.parameter">
    10531065         <p id="rfc.section.3.3.p.3">      Parameters are in the form of attribute/value pairs.</p>
    10541066      </div>
    1055       <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.49"></span><span id="rfc.iref.g.50"></span><span id="rfc.iref.g.51"></span>  <a href="#transfer.codings" class="smpl">parameter</a>               = <a href="#rule.parameter" class="smpl">attribute</a> "=" <a href="#rule.parameter" class="smpl">value</a>
     1067      <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.50"></span><span id="rfc.iref.g.51"></span><span id="rfc.iref.g.52"></span>  <a href="#transfer.codings" class="smpl">parameter</a>               = <a href="#rule.parameter" class="smpl">attribute</a> <a href="#rule.whitespace" class="smpl">BWS</a> "=" <a href="#rule.whitespace" class="smpl">BWS</a> <a href="#rule.parameter" class="smpl">value</a>
    10561068  <a href="#rule.parameter" class="smpl">attribute</a>               = <a href="#rule.token.separators" class="smpl">token</a>
    10571069  <a href="#rule.parameter" class="smpl">value</a>                   = <a href="#rule.token.separators" class="smpl">token</a> / <a href="#rule.quoted-string" class="smpl">quoted-string</a>
     
    10781090         necessary for the recipient to verify that it has received the full message.
    10791091      </p>
    1080       <div id="rfc.figure.u.23"></div><pre class="inline"><span id="rfc.iref.g.52"></span><span id="rfc.iref.g.53"></span><span id="rfc.iref.g.54"></span><span id="rfc.iref.g.55"></span><span id="rfc.iref.g.56"></span><span id="rfc.iref.g.57"></span><span id="rfc.iref.g.58"></span><span id="rfc.iref.g.59"></span><span id="rfc.iref.g.60"></span>  <a href="#chunked.transfer.encoding" class="smpl">Chunked-Body</a>   = *<a href="#chunked.transfer.encoding" class="smpl">chunk</a>
     1092      <div id="rfc.figure.u.23"></div><pre class="inline"><span id="rfc.iref.g.53"></span><span id="rfc.iref.g.54"></span><span id="rfc.iref.g.55"></span><span id="rfc.iref.g.56"></span><span id="rfc.iref.g.57"></span><span id="rfc.iref.g.58"></span><span id="rfc.iref.g.59"></span><span id="rfc.iref.g.60"></span><span id="rfc.iref.g.61"></span>  <a href="#chunked.transfer.encoding" class="smpl">Chunked-Body</a>   = *<a href="#chunked.transfer.encoding" class="smpl">chunk</a>
    10811093                   <a href="#chunked.transfer.encoding" class="smpl">last-chunk</a>
    10821094                   <a href="#chunked.transfer.encoding" class="smpl">trailer-part</a>
    10831095                   <a href="#core.rules" class="smpl">CRLF</a>
    10841096 
    1085   <a href="#chunked.transfer.encoding" class="smpl">chunk</a>          = <a href="#chunked.transfer.encoding" class="smpl">chunk-size</a> [ <a href="#chunked.transfer.encoding" class="smpl">chunk-extension</a> ] <a href="#core.rules" class="smpl">CRLF</a>
     1097  <a href="#chunked.transfer.encoding" class="smpl">chunk</a>          = <a href="#chunked.transfer.encoding" class="smpl">chunk-size</a> *WSP [ <a href="#chunked.transfer.encoding" class="smpl">chunk-ext</a> ] <a href="#core.rules" class="smpl">CRLF</a>
    10861098                   <a href="#chunked.transfer.encoding" class="smpl">chunk-data</a> <a href="#core.rules" class="smpl">CRLF</a>
    10871099  <a href="#chunked.transfer.encoding" class="smpl">chunk-size</a>     = 1*<a href="#core.rules" class="smpl">HEXDIG</a>
    1088   <a href="#chunked.transfer.encoding" class="smpl">last-chunk</a>     = 1*("0") [ <a href="#chunked.transfer.encoding" class="smpl">chunk-extension</a> ] <a href="#core.rules" class="smpl">CRLF</a>
     1100  <a href="#chunked.transfer.encoding" class="smpl">last-chunk</a>     = 1*("0") *WSP [ <a href="#chunked.transfer.encoding" class="smpl">chunk-ext</a> ] <a href="#core.rules" class="smpl">CRLF</a>
    10891101 
    1090   <a href="#chunked.transfer.encoding" class="smpl">chunk-extension</a>= *( ";" <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-name</a> [ "=" <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-val</a> ] )
     1102  <a href="#chunked.transfer.encoding" class="smpl">chunk-ext</a>      = *( ";" *WSP <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-name</a>
     1103                      [ "=" <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-val</a> ] *WSP )
    10911104  <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-name</a> = <a href="#rule.token.separators" class="smpl">token</a>
    10921105  <a href="#chunked.transfer.encoding" class="smpl">chunk-ext-val</a>  = <a href="#rule.token.separators" class="smpl">token</a> / <a href="#rule.quoted-string" class="smpl">quoted-string</a>
     
    11151128      </p>
    11161129      <p id="rfc.section.3.3.1.p.7">A process for decoding the "chunked" transfer-coding can be represented in pseudo-code as:</p>
    1117       <div id="rfc.figure.u.24"></div><pre class="text">    length := 0
    1118     read chunk-size, chunk-extension (if any) and CRLF
    1119     while (chunk-size &gt; 0) {
    1120        read chunk-data and CRLF
    1121        append chunk-data to entity-body
    1122        length := length + chunk-size
    1123        read chunk-size and CRLF
    1124     }
    1125     read entity-header
    1126     while (entity-header not empty) {
    1127        append entity-header to existing header fields
    1128        read entity-header
    1129     }
    1130     Content-Length := length
    1131     Remove "chunked" from Transfer-Encoding
    1132 </pre><p id="rfc.section.3.3.1.p.9">All HTTP/1.1 applications <em class="bcp14">MUST</em> be able to receive and decode the "chunked" transfer-coding, and <em class="bcp14">MUST</em> ignore chunk-extension extensions they do not understand.
     1130      <div id="rfc.figure.u.24"></div><pre class="text">  length := 0
     1131  read chunk-size, chunk-ext (if any) and CRLF
     1132  while (chunk-size &gt; 0) {
     1133     read chunk-data and CRLF
     1134     append chunk-data to entity-body
     1135     length := length + chunk-size
     1136     read chunk-size and CRLF
     1137  }
     1138  read entity-header
     1139  while (entity-header not empty) {
     1140     append entity-header to existing header fields
     1141     read entity-header
     1142  }
     1143  Content-Length := length
     1144  Remove "chunked" from Transfer-Encoding
     1145</pre><p id="rfc.section.3.3.1.p.9">All HTTP/1.1 applications <em class="bcp14">MUST</em> be able to receive and decode the "chunked" transfer-coding, and <em class="bcp14">MUST</em> ignore chunk-ext extensions they do not understand.
    11331146      </p>
    11341147      <h2 id="rfc.section.3.4"><a href="#rfc.section.3.4">3.4</a>&nbsp;<a id="product.tokens" href="#product.tokens">Product Tokens</a></h2>
     
    11371150         space. By convention, the products are listed in order of their significance for identifying the application.
    11381151      </p>
    1139       <div id="rfc.figure.u.25"></div><pre class="inline"><span id="rfc.iref.g.61"></span><span id="rfc.iref.g.62"></span>  <a href="#product.tokens" class="smpl">product</a>         = <a href="#rule.token.separators" class="smpl">token</a> ["/" <a href="#product.tokens" class="smpl">product-version</a>]
     1152      <div id="rfc.figure.u.25"></div><pre class="inline"><span id="rfc.iref.g.62"></span><span id="rfc.iref.g.63"></span>  <a href="#product.tokens" class="smpl">product</a>         = <a href="#rule.token.separators" class="smpl">token</a> ["/" <a href="#product.tokens" class="smpl">product-version</a>]
    11401153  <a href="#product.tokens" class="smpl">product-version</a> = <a href="#rule.token.separators" class="smpl">token</a>
    11411154</pre><p id="rfc.section.3.4.p.3">Examples:</p>
     
    11471160      <h2 id="rfc.section.4.1"><a href="#rfc.section.4.1">4.1</a>&nbsp;<a id="message.types" href="#message.types">Message Types</a></h2>
    11481161      <p id="rfc.section.4.1.p.1">HTTP messages consist of requests from client to server and responses from server to client.</p>
    1149       <div id="rfc.figure.u.27"></div><pre class="inline"><span id="rfc.iref.g.63"></span>  <a href="#message.types" class="smpl">HTTP-message</a>   = <a href="#request" class="smpl">Request</a> / <a href="#response" class="smpl">Response</a>     ; HTTP/1.1 messages
     1162      <div id="rfc.figure.u.27"></div><pre class="inline"><span id="rfc.iref.g.64"></span>  <a href="#message.types" class="smpl">HTTP-message</a>   = <a href="#request" class="smpl">Request</a> / <a href="#response" class="smpl">Response</a>     ; HTTP/1.1 messages
    11501163</pre><p id="rfc.section.4.1.p.3">Request (<a href="#request" title="Request">Section&nbsp;5</a>) and Response (<a href="#response" title="Response">Section&nbsp;6</a>) messages use the generic message format of <a href="#RFC5322" id="rfc.xref.RFC5322.2"><cite title="Internet Message Format">[RFC5322]</cite></a> for transferring entities (the payload of the message). Both types of message consist of a start-line, zero or more header
    11511164         fields (also known as "headers"), an empty line (i.e., a line with nothing preceding the CRLF) indicating the end of the header
    11521165         fields, and possibly a message-body.
    11531166      </p>
    1154       <div id="rfc.figure.u.28"></div><pre class="inline"><span id="rfc.iref.g.64"></span><span id="rfc.iref.g.65"></span>  <a href="#message.types" class="smpl">generic-message</a> = <a href="#message.types" class="smpl">start-line</a>
     1167      <div id="rfc.figure.u.28"></div><pre class="inline"><span id="rfc.iref.g.65"></span><span id="rfc.iref.g.66"></span>  <a href="#message.types" class="smpl">generic-message</a> = <a href="#message.types" class="smpl">start-line</a>
    11551168                    *(<a href="#message.headers" class="smpl">message-header</a> <a href="#core.rules" class="smpl">CRLF</a>)
    11561169                    <a href="#core.rules" class="smpl">CRLF</a>
     
    11701183         forms.
    11711184      </p>
    1172       <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.66"></span><span id="rfc.iref.g.67"></span><span id="rfc.iref.g.68"></span><span id="rfc.iref.g.69"></span>  <a href="#message.headers" class="smpl">message-header</a> = <a href="#message.headers" class="smpl">field-name</a> ":" [ <a href="#message.headers" class="smpl">field-value</a> ]
     1185      <div id="rfc.figure.u.29"></div><pre class="inline"><span id="rfc.iref.g.67"></span><span id="rfc.iref.g.68"></span><span id="rfc.iref.g.69"></span><span id="rfc.iref.g.70"></span>  <a href="#message.headers" class="smpl">message-header</a> = <a href="#message.headers" class="smpl">field-name</a> ":" [ <a href="#message.headers" class="smpl">field-value</a> ]
    11731186  <a href="#message.headers" class="smpl">field-name</a>     = <a href="#rule.token.separators" class="smpl">token</a>
    1174   <a href="#message.headers" class="smpl">field-value</a>    = *( <a href="#message.headers" class="smpl">field-content</a> / <a href="#rule.LWS" class="smpl">LWS</a> )
     1187  <a href="#message.headers" class="smpl">field-value</a>    = *( <a href="#message.headers" class="smpl">field-content</a> / <a href="#rule.whitespace" class="smpl">OWS</a> )
    11751188  <a href="#message.headers" class="smpl">field-content</a>  = &lt;field content&gt;
    1176                    ; the <a href="#core.rules" class="smpl">OCTET</a>s making up the field-value
    1177                    ; and consisting of either *<a href="#rule.TEXT" class="smpl">TEXT</a> or combinations
    1178                    ; of <a href="#rule.token.separators" class="smpl">token</a>, <a href="#rule.token.separators" class="smpl">separators</a>, and <a href="#rule.quoted-string" class="smpl">quoted-string</a>
    1179 </pre><p id="rfc.section.4.2.p.3">The field-content does not include any leading or trailing LWS: linear white space occurring before the first non-whitespace
     1189</pre><p id="rfc.section.4.2.p.3"> <span class="comment">[rfc.comment.2: whitespace between field-name and colon is an error and MUST NOT be accepted]</span>
     1190      </p>
     1191      <p id="rfc.section.4.2.p.4">The field-content does not include any leading or trailing LWS: linear white space occurring before the first non-whitespace
    11801192         character of the field-value or after the last non-whitespace character of the field-value. Such leading or trailing LWS <em class="bcp14">MAY</em> be removed without changing the semantics of the field value. Any LWS that occurs between field-content <em class="bcp14">MAY</em> be replaced with a single SP before interpreting the field value or forwarding the message downstream.
    11811193      </p>
    1182       <p id="rfc.section.4.2.p.4">The order in which header fields with differing field names are received is not significant. However, it is "good practice"
     1194      <p id="rfc.section.4.2.p.5">The order in which header fields with differing field names are received is not significant. However, it is "good practice"
    11831195         to send general-header fields first, followed by request-header or response-header fields, and ending with the entity-header
    11841196         fields.
    11851197      </p>
    1186       <p id="rfc.section.4.2.p.5">Multiple message-header fields with the same field-name <em class="bcp14">MAY</em> be present in a message if and only if the entire field-value for that header field is defined as a comma-separated list [i.e.,
     1198      <p id="rfc.section.4.2.p.6">Multiple message-header fields with the same field-name <em class="bcp14">MAY</em> be present in a message if and only if the entire field-value for that header field is defined as a comma-separated list [i.e.,
    11871199         #(values)]. It <em class="bcp14">MUST</em> be possible to combine the multiple header fields into one "field-name: field-value" pair, without changing the semantics
    11881200         of the message, by appending each subsequent field-value to the first, each separated by a comma. The order in which header
     
    11901202         thus a proxy <em class="bcp14">MUST NOT</em> change the order of these field values when a message is forwarded.
    11911203      </p>
    1192       <p id="rfc.section.4.2.p.6"> </p>
     1204      <p id="rfc.section.4.2.p.7"> </p>
    11931205      <dl class="empty">
    11941206         <dd> <b>Note:</b> the "Set-Cookie" header as implemented in practice (as opposed to how it is specified in <a href="#RFC2109" id="rfc.xref.RFC2109.1"><cite title="HTTP State Management Mechanism">[RFC2109]</cite></a>) can occur multiple times, but does not use the list syntax, and thus cannot be combined into a single line. (See Appendix
     
    12011213         header field (<a href="#header.transfer-encoding" id="rfc.xref.header.transfer-encoding.2" title="Transfer-Encoding">Section&nbsp;8.7</a>).
    12021214      </p>
    1203       <div id="rfc.figure.u.30"></div><pre class="inline"><span id="rfc.iref.g.70"></span>  <a href="#message.body" class="smpl">message-body</a> = <a href="#abnf.dependencies" class="smpl">entity-body</a>
     1215      <div id="rfc.figure.u.30"></div><pre class="inline"><span id="rfc.iref.g.71"></span>  <a href="#message.body" class="smpl">message-body</a> = <a href="#abnf.dependencies" class="smpl">entity-body</a>
    12041216               / &lt;entity-body encoded as per <a href="#header.transfer-encoding" class="smpl">Transfer-Encoding</a>&gt;
    12051217</pre><p id="rfc.section.4.3.p.3">Transfer-Encoding <em class="bcp14">MUST</em> be used to indicate any transfer-codings applied by an application to ensure safe and proper transfer of the message. Transfer-Encoding
     
    12691281         to the entity being transferred. These header fields apply only to the message being transmitted.
    12701282      </p>
    1271       <div id="rfc.figure.u.31"></div><pre class="inline"><span id="rfc.iref.g.71"></span>  <a href="#general.header.fields" class="smpl">general-header</a> = <a href="#abnf.dependencies" class="smpl">Cache-Control</a>            ; <a href="#Part6" id="rfc.xref.Part6.5"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>, <a href="p6-cache.html#header.cache-control" title="Cache-Control">Section 16.2</a>
     1283      <div id="rfc.figure.u.31"></div><pre class="inline"><span id="rfc.iref.g.72"></span>  <a href="#general.header.fields" class="smpl">general-header</a> = <a href="#abnf.dependencies" class="smpl">Cache-Control</a>            ; <a href="#Part6" id="rfc.xref.Part6.5"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>, <a href="p6-cache.html#header.cache-control" title="Cache-Control">Section 16.2</a>
    12721284                 / <a href="#header.connection" class="smpl">Connection</a>               ; <a href="#header.connection" id="rfc.xref.header.connection.1" title="Connection">Section&nbsp;8.1</a>
    12731285                 / <a href="#header.date" class="smpl">Date</a>                     ; <a href="#header.date" id="rfc.xref.header.date.1" title="Date">Section&nbsp;8.3</a>
     
    12861298         resource, the identifier of the resource, and the protocol version in use.
    12871299      </p>
    1288       <div id="rfc.figure.u.32"></div><pre class="inline"><span id="rfc.iref.g.72"></span>  <a href="#request" class="smpl">Request</a>       = <a href="#request-line" class="smpl">Request-Line</a>              ; <a href="#request-line" title="Request-Line">Section&nbsp;5.1</a>
     1300      <div id="rfc.figure.u.32"></div><pre class="inline"><span id="rfc.iref.g.73"></span>  <a href="#request" class="smpl">Request</a>       = <a href="#request-line" class="smpl">Request-Line</a>              ; <a href="#request-line" title="Request-Line">Section&nbsp;5.1</a>
    12891301                  *(( <a href="#general.header.fields" class="smpl">general-header</a>        ; <a href="#general.header.fields" title="General Header Fields">Section&nbsp;4.5</a>
    12901302                   / <a href="#abnf.dependencies" class="smpl">request-header</a>         ; <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, <a href="p2-semantics.html#request.header.fields" title="Request Header Fields">Section 4</a>
     
    12961308         The elements are separated by SP characters. No CR or LF is allowed except in the final CRLF sequence.
    12971309      </p>
    1298       <div id="rfc.figure.u.33"></div><pre class="inline"><span id="rfc.iref.g.73"></span>  <a href="#request-line" class="smpl">Request-Line</a>   = <a href="#method" class="smpl">Method</a> <a href="#core.rules" class="smpl">SP</a> <a href="#request-target" class="smpl">request-target</a> <a href="#core.rules" class="smpl">SP</a> <a href="#http.version" class="smpl">HTTP-Version</a> <a href="#core.rules" class="smpl">CRLF</a>
     1310      <div id="rfc.figure.u.33"></div><pre class="inline"><span id="rfc.iref.g.74"></span>  <a href="#request-line" class="smpl">Request-Line</a>   = <a href="#method" class="smpl">Method</a> <a href="#core.rules" class="smpl">SP</a> <a href="#request-target" class="smpl">request-target</a> <a href="#core.rules" class="smpl">SP</a> <a href="#http.version" class="smpl">HTTP-Version</a> <a href="#core.rules" class="smpl">CRLF</a>
    12991311</pre><h3 id="rfc.section.5.1.1"><a href="#rfc.section.5.1.1">5.1.1</a>&nbsp;<a id="method" href="#method">Method</a></h3>
    13001312      <p id="rfc.section.5.1.1.p.1">The Method token indicates the method to be performed on the resource identified by the request-target. The method is case-sensitive.</p>
    1301       <div id="rfc.figure.u.34"></div><pre class="inline"><span id="rfc.iref.g.74"></span><span id="rfc.iref.g.75"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#rule.token.separators" class="smpl">token</a>
     1313      <div id="rfc.figure.u.34"></div><pre class="inline"><span id="rfc.iref.g.75"></span><span id="rfc.iref.g.76"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#rule.token.separators" class="smpl">token</a>
    13021314</pre><h3 id="rfc.section.5.1.2"><a href="#rfc.section.5.1.2">5.1.2</a>&nbsp;<a id="request-target" href="#request-target">request-target</a></h3>
    13031315      <p id="rfc.section.5.1.2.p.1">The request-target is a Uniform Resource Identifier (<a href="#uri" title="Uniform Resource Identifiers">Section&nbsp;2.1</a>) and identifies the resource upon which to apply the request.
    13041316      </p>
    1305       <div id="rfc.figure.u.35"></div><pre class="inline"><span id="rfc.iref.g.76"></span>  <a href="#request-target" class="smpl">request-target</a>    = "*"
     1317      <div id="rfc.figure.u.35"></div><pre class="inline"><span id="rfc.iref.g.77"></span>  <a href="#request-target" class="smpl">request-target</a>    = "*"
    13061318                 / <a href="#uri" class="smpl">absolute-URI</a>
    13071319                 / ( <a href="#uri" class="smpl">path-absolute</a> [ "?" <a href="#uri" class="smpl">query</a> ] )
     
    13521364         field.
    13531365      </p>
    1354       <p id="rfc.section.5.2.p.2">An origin server that does not allow resources to differ by the requested host <em class="bcp14">MAY</em> ignore the Host header field value when determining the resource identified by an HTTP/1.1 request. (But see <a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" title="Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses">Appendix&nbsp;C.1.1</a> for other requirements on Host support in HTTP/1.1.)
     1366      <p id="rfc.section.5.2.p.2">An origin server that does not allow resources to differ by the requested host <em class="bcp14">MAY</em> ignore the Host header field value when determining the resource identified by an HTTP/1.1 request. (But see <a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" title="Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses">Appendix&nbsp;B.1.1</a> for other requirements on Host support in HTTP/1.1.)
    13551367      </p>
    13561368      <p id="rfc.section.5.2.p.3">An origin server that does differentiate resources based on the host requested (sometimes referred to as virtual hosts or
     
    13711383      <h1 id="rfc.section.6"><a href="#rfc.section.6">6.</a>&nbsp;<a id="response" href="#response">Response</a></h1>
    13721384      <p id="rfc.section.6.p.1">After receiving and interpreting a request message, a server responds with an HTTP response message.</p>
    1373       <div id="rfc.figure.u.39"></div><pre class="inline"><span id="rfc.iref.g.77"></span>  <a href="#response" class="smpl">Response</a>      = <a href="#status-line" class="smpl">Status-Line</a>               ; <a href="#status-line" title="Status-Line">Section&nbsp;6.1</a>
     1385      <div id="rfc.figure.u.39"></div><pre class="inline"><span id="rfc.iref.g.78"></span>  <a href="#response" class="smpl">Response</a>      = <a href="#status-line" class="smpl">Status-Line</a>               ; <a href="#status-line" title="Status-Line">Section&nbsp;6.1</a>
    13741386                  *(( <a href="#general.header.fields" class="smpl">general-header</a>        ; <a href="#general.header.fields" title="General Header Fields">Section&nbsp;4.5</a>
    13751387                   / <a href="#abnf.dependencies" class="smpl">response-header</a>        ; <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, <a href="p2-semantics.html#response.header.fields" title="Response Header Fields">Section 6</a>
     
    13821394         CRLF sequence.
    13831395      </p>
    1384       <div id="rfc.figure.u.40"></div><pre class="inline"><span id="rfc.iref.g.78"></span>  <a href="#status-line" class="smpl">Status-Line</a> = <a href="#http.version" class="smpl">HTTP-Version</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status.code.and.reason.phrase" class="smpl">Reason-Phrase</a> <a href="#core.rules" class="smpl">CRLF</a>
     1396      <div id="rfc.figure.u.40"></div><pre class="inline"><span id="rfc.iref.g.79"></span>  <a href="#status-line" class="smpl">Status-Line</a> = <a href="#http.version" class="smpl">HTTP-Version</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status.code.and.reason.phrase" class="smpl">Reason-Phrase</a> <a href="#core.rules" class="smpl">CRLF</a>
    13851397</pre><h3 id="rfc.section.6.1.1"><a href="#rfc.section.6.1.1">6.1.1</a>&nbsp;<a id="status.code.and.reason.phrase" href="#status.code.and.reason.phrase">Status Code and Reason Phrase</a></h3>
    13861398      <p id="rfc.section.6.1.1.p.1">The Status-Code element is a 3-digit integer result code of the attempt to understand and satisfy the request. These codes
     
    13991411         <li>5xx: Server Error - The server failed to fulfill an apparently valid request</li>
    14001412      </ul>
    1401       <div id="rfc.figure.u.41"></div><pre class="inline"><span id="rfc.iref.g.79"></span><span id="rfc.iref.g.80"></span><span id="rfc.iref.g.81"></span>  <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a>    = 3<a href="#core.rules" class="smpl">DIGIT</a>
     1413      <div id="rfc.figure.u.41"></div><pre class="inline"><span id="rfc.iref.g.80"></span><span id="rfc.iref.g.81"></span><span id="rfc.iref.g.82"></span>  <a href="#status.code.and.reason.phrase" class="smpl">Status-Code</a>    = 3<a href="#core.rules" class="smpl">DIGIT</a>
    14021414  <a href="#status.code.and.reason.phrase" class="smpl">Reason-Phrase</a>  = *&lt;<a href="#rule.TEXT" class="smpl">TEXT</a>, excluding <a href="#core.rules" class="smpl">CR</a>, <a href="#core.rules" class="smpl">LF</a>&gt;
    14031415</pre><h1 id="rfc.section.7"><a href="#rfc.section.7">7.</a>&nbsp;<a id="connections" href="#connections">Connections</a></h1>
     
    14461458         connection.
    14471459      </p>
    1448       <p id="rfc.section.7.1.2.1.p.4">Clients and servers <em class="bcp14">SHOULD NOT</em> assume that a persistent connection is maintained for HTTP versions less than 1.1 unless it is explicitly signaled. See <a href="#compatibility.with.http.1.0.persistent.connections" title="Compatibility with HTTP/1.0 Persistent Connections">Appendix&nbsp;C.2</a> for more information on backward compatibility with HTTP/1.0 clients.
     1460      <p id="rfc.section.7.1.2.1.p.4">Clients and servers <em class="bcp14">SHOULD NOT</em> assume that a persistent connection is maintained for HTTP versions less than 1.1 unless it is explicitly signaled. See <a href="#compatibility.with.http.1.0.persistent.connections" title="Compatibility with HTTP/1.0 Persistent Connections">Appendix&nbsp;B.2</a> for more information on backward compatibility with HTTP/1.0 clients.
    14491461      </p>
    14501462      <p id="rfc.section.7.1.2.1.p.5">In order to remain persistent, all messages on the connection <em class="bcp14">MUST</em> have a self-defined message length (i.e., one not defined by closure of the connection), as described in <a href="#message.length" title="Message Length">Section&nbsp;4.4</a>.
     
    15871599      <div id="rfc.iref.h.3"></div>
    15881600      <h2 id="rfc.section.8.1"><a href="#rfc.section.8.1">8.1</a>&nbsp;<a id="header.connection" href="#header.connection">Connection</a></h2>
    1589       <p id="rfc.section.8.1.p.1">The Connection general-header field allows the sender to specify options that are desired for that particular connection and <em class="bcp14">MUST NOT</em> be communicated by proxies over further connections.
    1590       </p>
    1591       <p id="rfc.section.8.1.p.2">The Connection header has the following grammar:</p>
    1592       <div id="rfc.figure.u.42"></div><pre class="inline"><span id="rfc.iref.g.82"></span><span id="rfc.iref.g.83"></span>  <a href="#header.connection" class="smpl">Connection</a> = "Connection" ":" 1#(<a href="#header.connection" class="smpl">connection-token</a>)
    1593   <a href="#header.connection" class="smpl">connection-token</a>  = <a href="#rule.token.separators" class="smpl">token</a>
     1601      <p id="rfc.section.8.1.p.1">The general-header field "Connection" allows the sender to specify options that are desired for that particular connection
     1602         and <em class="bcp14">MUST NOT</em> be communicated by proxies over further connections.
     1603      </p>
     1604      <p id="rfc.section.8.1.p.2">The Connection header's value has the following grammar:</p>
     1605      <div id="rfc.figure.u.42"></div><pre class="inline"><span id="rfc.iref.g.83"></span><span id="rfc.iref.g.84"></span><span id="rfc.iref.g.85"></span>  <a href="#header.connection" class="smpl">Connection</a>       = "Connection" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.connection" class="smpl">Connection-v</a>
     1606  <a href="#header.connection" class="smpl">Connection-v</a>     = 1#<a href="#header.connection" class="smpl">connection-token</a>
     1607  <a href="#header.connection" class="smpl">connection-token</a> = <a href="#rule.token.separators" class="smpl">token</a>
    15941608</pre><p id="rfc.section.8.1.p.4">HTTP/1.1 proxies <em class="bcp14">MUST</em> parse the Connection header field before a message is forwarded and, for each connection-token in this field, remove any header
    15951609         field(s) from the message with the same name as the connection-token. Connection options are signaled by the presence of a
     
    16021616         of the response. For example,
    16031617      </p>
    1604       <div id="rfc.figure.u.43"></div><pre class="text">    Connection: close
     1618      <div id="rfc.figure.u.43"></div><pre class="text">  Connection: close
    16051619</pre><p id="rfc.section.8.1.p.8">in either the request or the response header fields indicates that the connection <em class="bcp14">SHOULD NOT</em> be considered `persistent' (<a href="#persistent.connections" title="Persistent Connections">Section&nbsp;7.1</a>) after the current request/response is complete.
    16061620      </p>
     
    16101624      </p>
    16111625      <p id="rfc.section.8.1.p.11">A system receiving an HTTP/1.0 (or lower-version) message that includes a Connection header <em class="bcp14">MUST</em>, for each connection-token in this field, remove and ignore any header field(s) from the message with the same name as the
    1612          connection-token. This protects against mistaken forwarding of such header fields by pre-HTTP/1.1 proxies. See <a href="#compatibility.with.http.1.0.persistent.connections" title="Compatibility with HTTP/1.0 Persistent Connections">Appendix&nbsp;C.2</a>.
     1626         connection-token. This protects against mistaken forwarding of such header fields by pre-HTTP/1.1 proxies. See <a href="#compatibility.with.http.1.0.persistent.connections" title="Compatibility with HTTP/1.0 Persistent Connections">Appendix&nbsp;B.2</a>.
    16131627      </p>
    16141628      <div id="rfc.iref.c.2"></div>
    16151629      <div id="rfc.iref.h.4"></div>
    16161630      <h2 id="rfc.section.8.2"><a href="#rfc.section.8.2">8.2</a>&nbsp;<a id="header.content-length" href="#header.content-length">Content-Length</a></h2>
    1617       <p id="rfc.section.8.2.p.1">The Content-Length entity-header field indicates the size of the entity-body, in decimal number of OCTETs, sent to the recipient
     1631      <p id="rfc.section.8.2.p.1">The entity-header field "Content-Length" indicates the size of the entity-body, in decimal number of OCTETs, sent to the recipient
    16181632         or, in the case of the HEAD method, the size of the entity-body that would have been sent had the request been a GET.
    16191633      </p>
    1620       <div id="rfc.figure.u.44"></div><pre class="inline"><span id="rfc.iref.g.84"></span>  <a href="#header.content-length" class="smpl">Content-Length</a>    = "Content-Length" ":" 1*<a href="#core.rules" class="smpl">DIGIT</a>
     1634      <div id="rfc.figure.u.44"></div><pre class="inline"><span id="rfc.iref.g.86"></span><span id="rfc.iref.g.87"></span>  <a href="#header.content-length" class="smpl">Content-Length</a>   = "Content-Length" ":" <a href="#rule.whitespace" class="smpl">OWS</a> 1*<a href="#header.content-length" class="smpl">Content-Length-v</a>
     1635  <a href="#header.content-length" class="smpl">Content-Length-v</a> = 1*<a href="#core.rules" class="smpl">DIGIT</a>
    16211636</pre><p id="rfc.section.8.2.p.3">An example is</p>
    1622       <div id="rfc.figure.u.45"></div><pre class="text">    Content-Length: 3495
     1637      <div id="rfc.figure.u.45"></div><pre class="text">  Content-Length: 3495
    16231638</pre><p id="rfc.section.8.2.p.5">Applications <em class="bcp14">SHOULD</em> use this field to indicate the transfer-length of the message-body, unless this is prohibited by the rules in <a href="#message.length" title="Message Length">Section&nbsp;4.4</a>.
    16241639      </p>
     
    16321647      <div id="rfc.iref.h.5"></div>
    16331648      <h2 id="rfc.section.8.3"><a href="#rfc.section.8.3">8.3</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h2>
    1634       <p id="rfc.section.8.3.p.1">The Date general-header field represents the date and time at which the message was originated, having the same semantics
     1649      <p id="rfc.section.8.3.p.1">The general-header field "Date" represents the date and time at which the message was originated, having the same semantics
    16351650         as orig-date in <a href="http://tools.ietf.org/html/rfc5322#section-3.6.1">Section 3.6.1</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.4"><cite title="Internet Message Format">[RFC5322]</cite></a>. The field value is an HTTP-date, as described in <a href="#full.date" title="Full Date">Section&nbsp;3.2.1</a>; it <em class="bcp14">MUST</em> be sent in rfc1123-date format.
    16361651      </p>
    1637       <div id="rfc.figure.u.46"></div><pre class="inline"><span id="rfc.iref.g.85"></span>  <a href="#header.date" class="smpl">Date</a>  = "Date" ":" <a href="#full.date" class="smpl">HTTP-date</a>
     1652      <div id="rfc.figure.u.46"></div><pre class="inline"><span id="rfc.iref.g.88"></span><span id="rfc.iref.g.89"></span>  <a href="#header.date" class="smpl">Date</a>   = "Date" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.date" class="smpl">Date-v</a>
     1653  <a href="#header.date" class="smpl">Date-v</a> = <a href="#full.date" class="smpl">HTTP-date</a>
    16381654</pre><p id="rfc.section.8.3.p.3">An example is</p>
    1639       <div id="rfc.figure.u.47"></div><pre class="text">    Date: Tue, 15 Nov 1994 08:12:31 GMT
     1655      <div id="rfc.figure.u.47"></div><pre class="text">  Date: Tue, 15 Nov 1994 08:12:31 GMT
    16401656</pre><p id="rfc.section.8.3.p.5">Origin servers <em class="bcp14">MUST</em> include a Date header field in all responses, except in these cases:
    16411657      </p>
     
    16681684      <div id="rfc.iref.h.7"></div>
    16691685      <h2 id="rfc.section.8.4"><a href="#rfc.section.8.4">8.4</a>&nbsp;<a id="header.host" href="#header.host">Host</a></h2>
    1670       <p id="rfc.section.8.4.p.1">The Host request-header field specifies the Internet host and port number of the resource being requested, as obtained from
     1686      <p id="rfc.section.8.4.p.1">The request-header field "Host" specifies the Internet host and port number of the resource being requested, as obtained from
    16711687         the original URI given by the user or referring resource (generally an http URI, as described in <a href="#http.uri" title="http URI scheme">Section&nbsp;2.1.1</a>). The Host field value <em class="bcp14">MUST</em> represent the naming authority of the origin server or gateway given by the original URL. This allows the origin server or
    16721688         gateway to differentiate between internally-ambiguous URLs, such as the root "/" URL of a server for multiple host names on
    16731689         a single IP address.
    16741690      </p>
    1675       <div id="rfc.figure.u.48"></div><pre class="inline"><span id="rfc.iref.g.86"></span>  <a href="#header.host" class="smpl">Host</a> = "Host" ":" <a href="#uri" class="smpl">uri-host</a> [ ":" <a href="#uri" class="smpl">port</a> ] ; <a href="#http.uri" title="http URI scheme">Section&nbsp;2.1.1</a>
     1691      <div id="rfc.figure.u.48"></div><pre class="inline"><span id="rfc.iref.g.90"></span><span id="rfc.iref.g.91"></span>  <a href="#header.host" class="smpl">Host</a>   = "Host" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.host" class="smpl">Host-v</a>
     1692  <a href="#header.host" class="smpl">Host-v</a> = <a href="#uri" class="smpl">uri-host</a> [ ":" <a href="#uri" class="smpl">port</a> ] ; <a href="#http.uri" title="http URI scheme">Section&nbsp;2.1.1</a>
    16761693</pre><p id="rfc.section.8.4.p.3">A "host" without any trailing port information implies the default port for the service requested (e.g., "80" for an HTTP
    16771694         URL). For example, a request on the origin server for &lt;http://www.example.org/pub/WWW/&gt; would properly include:
    16781695      </p>
    1679       <div id="rfc.figure.u.49"></div><pre class="text">    GET /pub/WWW/ HTTP/1.1
    1680     Host: www.example.org
     1696      <div id="rfc.figure.u.49"></div><pre class="text">  GET /pub/WWW/ HTTP/1.1
     1697  Host: www.example.org
    16811698</pre><p id="rfc.section.8.4.p.5">A client <em class="bcp14">MUST</em> include a Host header field in all HTTP/1.1 request messages. If the requested URI does not include an Internet host name
    16821699         for the service being requested, then the Host header field <em class="bcp14">MUST</em> be given with an empty value. An HTTP/1.1 proxy <em class="bcp14">MUST</em> ensure that any request message it forwards does contain an appropriate Host header field that identifies the service being
    16831700         requested by the proxy. All Internet-based HTTP/1.1 servers <em class="bcp14">MUST</em> respond with a 400 (Bad Request) status code to any HTTP/1.1 request message which lacks a Host header field.
    16841701      </p>
    1685       <p id="rfc.section.8.4.p.6">See Sections <a href="#the.resource.identified.by.a.request" title="The Resource Identified by a Request">5.2</a> and <a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" title="Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses">C.1.1</a> for other requirements relating to Host.
     1702      <p id="rfc.section.8.4.p.6">See Sections <a href="#the.resource.identified.by.a.request" title="The Resource Identified by a Request">5.2</a> and <a href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" title="Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses">B.1.1</a> for other requirements relating to Host.
    16861703      </p>
    16871704      <div id="rfc.iref.t.1"></div>
    16881705      <div id="rfc.iref.h.8"></div>
    16891706      <h2 id="rfc.section.8.5"><a href="#rfc.section.8.5">8.5</a>&nbsp;<a id="header.te" href="#header.te">TE</a></h2>
    1690       <p id="rfc.section.8.5.p.1">The TE request-header field indicates what extension transfer-codings it is willing to accept in the response and whether
     1707      <p id="rfc.section.8.5.p.1">The request-header field "TE" indicates what extension transfer-codings it is willing to accept in the response and whether
    16911708         or not it is willing to accept trailer fields in a chunked transfer-coding. Its value may consist of the keyword "trailers"
    16921709         and/or a comma-separated list of extension transfer-coding names with optional accept parameters (as described in <a href="#transfer.codings" title="Transfer Codings">Section&nbsp;3.3</a>).
    16931710      </p>
    1694       <div id="rfc.figure.u.50"></div><pre class="inline"><span id="rfc.iref.g.87"></span><span id="rfc.iref.g.88"></span>  <a href="#header.te" class="smpl">TE</a>        = "TE" ":" #( <a href="#header.te" class="smpl">t-codings</a> )
     1711      <div id="rfc.figure.u.50"></div><pre class="inline"><span id="rfc.iref.g.92"></span><span id="rfc.iref.g.93"></span><span id="rfc.iref.g.94"></span>  <a href="#header.te" class="smpl">TE</a>        = "TE" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.te" class="smpl">TE-v</a>
     1712  <a href="#header.te" class="smpl">TE-v</a>      = #<a href="#header.te" class="smpl">t-codings</a>
    16951713  <a href="#header.te" class="smpl">t-codings</a> = "trailers" / ( <a href="#transfer.codings" class="smpl">transfer-extension</a> [ <a href="#abnf.dependencies" class="smpl">accept-params</a> ] )
    16961714</pre><p id="rfc.section.8.5.p.3">The presence of the keyword "trailers" indicates that the client is willing to accept trailer fields in a chunked transfer-coding,
     
    16981716      </p>
    16991717      <p id="rfc.section.8.5.p.4">Examples of its use are:</p>
    1700       <div id="rfc.figure.u.51"></div><pre class="text">    TE: deflate
    1701     TE:
    1702     TE: trailers, deflate;q=0.5
     1718      <div id="rfc.figure.u.51"></div><pre class="text">  TE: deflate
     1719  TE:
     1720  TE: trailers, deflate;q=0.5
    17031721</pre><p id="rfc.section.8.5.p.6">The TE header field only applies to the immediate connection. Therefore, the keyword <em class="bcp14">MUST</em> be supplied within a Connection header field (<a href="#header.connection" id="rfc.xref.header.connection.4" title="Connection">Section&nbsp;8.1</a>) whenever TE is present in an HTTP/1.1 message.
    17041722      </p>
     
    17321750      <div id="rfc.iref.h.9"></div>
    17331751      <h2 id="rfc.section.8.6"><a href="#rfc.section.8.6">8.6</a>&nbsp;<a id="header.trailer" href="#header.trailer">Trailer</a></h2>
    1734       <p id="rfc.section.8.6.p.1">The Trailer general field value indicates that the given set of header fields is present in the trailer of a message encoded
    1735          with chunked transfer-coding.
    1736       </p>
    1737       <div id="rfc.figure.u.52"></div><pre class="inline"><span id="rfc.iref.g.89"></span>  <a href="#header.trailer" class="smpl">Trailer</a>  = "Trailer" ":" 1#<a href="#message.headers" class="smpl">field-name</a>
     1752      <p id="rfc.section.8.6.p.1">The general field "Trailer" indicates that the given set of header fields is present in the trailer of a message encoded with
     1753         chunked transfer-coding.
     1754      </p>
     1755      <div id="rfc.figure.u.52"></div><pre class="inline"><span id="rfc.iref.g.95"></span><span id="rfc.iref.g.96"></span>  <a href="#header.trailer" class="smpl">Trailer</a>   = "Trailer" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.trailer" class="smpl">Trailer-v</a>
     1756  <a href="#header.trailer" class="smpl">Trailer-v</a> = 1#<a href="#message.headers" class="smpl">field-name</a>
    17381757</pre><p id="rfc.section.8.6.p.3">An HTTP/1.1 message <em class="bcp14">SHOULD</em> include a Trailer header field in a message using chunked transfer-coding with a non-empty trailer. Doing so allows the recipient
    17391758         to know which header fields to expect in the trailer.
     
    17511770      <div id="rfc.iref.h.10"></div>
    17521771      <h2 id="rfc.section.8.7"><a href="#rfc.section.8.7">8.7</a>&nbsp;<a id="header.transfer-encoding" href="#header.transfer-encoding">Transfer-Encoding</a></h2>
    1753       <p id="rfc.section.8.7.p.1">The Transfer-Encoding general-header field indicates what (if any) type of transformation has been applied to the message
     1772      <p id="rfc.section.8.7.p.1">The general-header "Transfer-Encoding" field indicates what (if any) type of transformation has been applied to the message
    17541773         body in order to safely transfer it between the sender and the recipient. This differs from the content-coding in that the
    17551774         transfer-coding is a property of the message, not of the entity.
    17561775      </p>
    1757       <div id="rfc.figure.u.53"></div><pre class="inline"><span id="rfc.iref.g.90"></span>  <a href="#header.transfer-encoding" class="smpl">Transfer-Encoding</a>       = "Transfer-Encoding" ":" 1#<a href="#transfer.codings" class="smpl">transfer-coding</a>
     1776      <div id="rfc.figure.u.53"></div><pre class="inline"><span id="rfc.iref.g.97"></span><span id="rfc.iref.g.98"></span>  <a href="#header.transfer-encoding" class="smpl">Transfer-Encoding</a>   = "Transfer-Encoding" ":" <a href="#rule.whitespace" class="smpl">OWS</a>
     1777                        <a href="#header.transfer-encoding" class="smpl">Transfer-Encoding-v</a>
     1778  <a href="#header.transfer-encoding" class="smpl">Transfer-Encoding-v</a> = 1#<a href="#transfer.codings" class="smpl">transfer-coding</a>
    17581779</pre><p id="rfc.section.8.7.p.3">Transfer-codings are defined in <a href="#transfer.codings" title="Transfer Codings">Section&nbsp;3.3</a>. An example is:
    17591780      </p>
     
    17651786      <div id="rfc.iref.h.11"></div>
    17661787      <h2 id="rfc.section.8.8"><a href="#rfc.section.8.8">8.8</a>&nbsp;<a id="header.upgrade" href="#header.upgrade">Upgrade</a></h2>
    1767       <p id="rfc.section.8.8.p.1">The Upgrade general-header allows the client to specify what additional communication protocols it supports and would like
     1788      <p id="rfc.section.8.8.p.1">The general-header "Upgrade" allows the client to specify what additional communication protocols it supports and would like
    17681789         to use if the server finds it appropriate to switch protocols. The server <em class="bcp14">MUST</em> use the Upgrade header field within a 101 (Switching Protocols) response to indicate which protocol(s) are being switched.
    17691790      </p>
    1770       <div id="rfc.figure.u.55"></div><pre class="inline"><span id="rfc.iref.g.91"></span>  <a href="#header.upgrade" class="smpl">Upgrade</a>        = "Upgrade" ":" 1#<a href="#product.tokens" class="smpl">product</a>
     1791      <div id="rfc.figure.u.55"></div><pre class="inline"><span id="rfc.iref.g.99"></span><span id="rfc.iref.g.100"></span>  <a href="#header.upgrade" class="smpl">Upgrade</a>   = "Upgrade" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.upgrade" class="smpl">Upgrade-v</a>
     1792  <a href="#header.upgrade" class="smpl">Upgrade-v</a> = 1#<a href="#product.tokens" class="smpl">product</a>
    17711793</pre><p id="rfc.section.8.8.p.3">For example,</p>
    1772       <div id="rfc.figure.u.56"></div><pre class="text">    Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11
     1794      <div id="rfc.figure.u.56"></div><pre class="text">  Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11
    17731795</pre><p id="rfc.section.8.8.p.5">The Upgrade header field is intended to provide a simple mechanism for transition from HTTP/1.1 to some other, incompatible
    17741796         protocol. It does so by allowing the client to advertise its desire to use another protocol, such as a later version of HTTP
     
    17951817      <div id="rfc.iref.h.12"></div>
    17961818      <h2 id="rfc.section.8.9"><a href="#rfc.section.8.9">8.9</a>&nbsp;<a id="header.via" href="#header.via">Via</a></h2>
    1797       <p id="rfc.section.8.9.p.1">The Via general-header field <em class="bcp14">MUST</em> be used by gateways and proxies to indicate the intermediate protocols and recipients between the user agent and the server
     1819      <p id="rfc.section.8.9.p.1">The general-header field "Via" <em class="bcp14">MUST</em> be used by gateways and proxies to indicate the intermediate protocols and recipients between the user agent and the server
    17981820         on requests, and between the origin server and the client on responses. It is analogous to the "Received" field defined in <a href="http://tools.ietf.org/html/rfc5322#section-3.6.7">Section 3.6.7</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.5"><cite title="Internet Message Format">[RFC5322]</cite></a> and is intended to be used for tracking message forwards, avoiding request loops, and identifying the protocol capabilities
    17991821         of all senders along the request/response chain.
    18001822      </p>
    1801       <div id="rfc.figure.u.57"></div><pre class="inline"><span id="rfc.iref.g.92"></span><span id="rfc.iref.g.93"></span><span id="rfc.iref.g.94"></span><span id="rfc.iref.g.95"></span><span id="rfc.iref.g.96"></span><span id="rfc.iref.g.97"></span>  <a href="#header.via" class="smpl">Via</a> =  "Via" ":" 1#( <a href="#header.via" class="smpl">received-protocol</a> <a href="#header.via" class="smpl">received-by</a> [ <a href="#rule.comment" class="smpl">comment</a> ] )
     1823      <div id="rfc.figure.u.57"></div><pre class="inline"><span id="rfc.iref.g.101"></span><span id="rfc.iref.g.102"></span><span id="rfc.iref.g.103"></span><span id="rfc.iref.g.104"></span><span id="rfc.iref.g.105"></span><span id="rfc.iref.g.106"></span><span id="rfc.iref.g.107"></span>  <a href="#header.via" class="smpl">Via</a>               = "Via" ":" <a href="#rule.whitespace" class="smpl">OWS</a> <a href="#header.via" class="smpl">Via-v</a>
     1824  <a href="#header.via" class="smpl">Via-v</a>             = 1#( <a href="#header.via" class="smpl">received-protocol</a> <a href="#rule.whitespace" class="smpl">RWS</a> <a href="#header.via" class="smpl">received-by</a>
     1825                          [ <a href="#rule.whitespace" class="smpl">RWS</a> <a href="#rule.comment" class="smpl">comment</a> ] )
    18021826  <a href="#header.via" class="smpl">received-protocol</a> = [ <a href="#header.via" class="smpl">protocol-name</a> "/" ] <a href="#header.via" class="smpl">protocol-version</a>
    18031827  <a href="#header.via" class="smpl">protocol-name</a>     = <a href="#rule.token.separators" class="smpl">token</a>
     
    18221846         server at www.example.com. The request received by www.example.com would then have the following Via header field:
    18231847      </p>
    1824       <div id="rfc.figure.u.58"></div><pre class="text">    Via: 1.0 fred, 1.1 p.example.net (Apache/1.1)
     1848      <div id="rfc.figure.u.58"></div><pre class="text">  Via: 1.0 fred, 1.1 p.example.net (Apache/1.1)
    18251849</pre><p id="rfc.section.8.9.p.9">Proxies and gateways used as a portal through a network firewall <em class="bcp14">SHOULD NOT</em>, by default, forward the names and ports of hosts within the firewall region. This information <em class="bcp14">SHOULD</em> only be propagated if explicitly enabled. If not enabled, the received-by host of any host behind the firewall <em class="bcp14">SHOULD</em> be replaced by an appropriate pseudonym for that host.
    18261850      </p>
     
    18281852         For example,
    18291853      </p>
    1830       <div id="rfc.figure.u.59"></div><pre class="text">    Via: 1.0 ricky, 1.1 ethel, 1.1 fred, 1.0 lucy
     1854      <div id="rfc.figure.u.59"></div><pre class="text">  Via: 1.0 ricky, 1.1 ethel, 1.1 fred, 1.0 lucy
    18311855</pre><p id="rfc.section.8.9.p.12">could be collapsed to</p>
    1832       <div id="rfc.figure.u.60"></div><pre class="text">    Via: 1.0 ricky, 1.1 mertz, 1.0 lucy
     1856      <div id="rfc.figure.u.60"></div><pre class="text">  Via: 1.0 ricky, 1.1 mertz, 1.0 lucy
    18331857</pre><p id="rfc.section.8.9.p.14">Applications <em class="bcp14">SHOULD NOT</em> combine multiple entries unless they are all under the same organizational control and the hosts have already been replaced
    18341858         by pseudonyms. Applications <em class="bcp14">MUST NOT</em> combine entries which have different received-protocol values.
     
    21942218      <h2 id="rfc.references.2"><a href="#rfc.section.12.2" id="rfc.section.12.2">12.2</a> Informative References
    21952219      </h2>
    2196       <table summary="Informative References">                                               
     2220      <table summary="Informative References">                                             
    21972221         <tr>
    21982222            <td class="reference"><b id="Kri2001">[Kri2001]</b></td>
     
    22892313            <td class="reference"><b id="RFC5322">[RFC5322]</b></td>
    22902314            <td class="top">Resnick, P., “<a href="http://tools.ietf.org/html/rfc5322">Internet Message Format</a>”, RFC&nbsp;5322, October&nbsp;2008.
    2291             </td>
    2292          </tr>
    2293          <tr>
    2294             <td class="reference"><b id="RFC822">[RFC822]</b></td>
    2295             <td class="top"><a title="University of Delaware, Dept. of Electrical Engineering">Crocker, D.H.</a>, “<a href="http://tools.ietf.org/html/rfc822">Standard for the format of ARPA Internet text messages</a>”, STD&nbsp;11, RFC&nbsp;822, August&nbsp;1982.
    22962315            </td>
    22972316         </tr>
     
    23582377         </li>
    23592378      </ul>
    2360       <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="conversion.of.date.formats" href="#conversion.of.date.formats">Conversion of Date Formats</a></h1>
    2361       <p id="rfc.section.B.p.1">HTTP/1.1 uses a restricted set of date formats (<a href="#full.date" title="Full Date">Section&nbsp;3.2.1</a>) to simplify the process of date comparison. Proxies and gateways from other protocols <em class="bcp14">SHOULD</em> ensure that any Date header field present in a message conforms to one of the HTTP/1.1 formats and rewrite the date if necessary.
    2362       </p>
    2363       <h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a>&nbsp;<a id="compatibility" href="#compatibility">Compatibility with Previous Versions</a></h1>
    2364       <p id="rfc.section.C.p.1">HTTP has been in use by the World-Wide Web global information initiative since 1990. The first version of HTTP, later referred
     2379      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;<a id="compatibility" href="#compatibility">Compatibility with Previous Versions</a></h1>
     2380      <p id="rfc.section.B.p.1">HTTP has been in use by the World-Wide Web global information initiative since 1990. The first version of HTTP, later referred
    23652381         to as HTTP/0.9, was a simple protocol for hypertext data transfer across the Internet with only a single method and no metadata.
    23662382         HTTP/1.0, as defined by <a href="#RFC1945" id="rfc.xref.RFC1945.1"><cite title="Hypertext Transfer Protocol -- HTTP/1.0">[RFC1945]</cite></a>, added a range of request methods and MIME-like messaging that could include metadata about the data transferred and modifiers
     
    23702386         to determine each other's true capabilities.
    23712387      </p>
    2372       <p id="rfc.section.C.p.2">HTTP/1.1 remains compatible with HTTP/1.0 by including more stringent requirements that enable reliable implementations, adding
     2388      <p id="rfc.section.B.p.2">HTTP/1.1 remains compatible with HTTP/1.0 by including more stringent requirements that enable reliable implementations, adding
    23732389         only those new features that will either be safely ignored by an HTTP/1.0 recipient or only sent when communicating with a
    23742390         party advertising compliance with HTTP/1.1.
    23752391      </p>
    2376       <p id="rfc.section.C.p.3">It is beyond the scope of a protocol specification to mandate compliance with previous versions. HTTP/1.1 was deliberately
     2392      <p id="rfc.section.B.p.3">It is beyond the scope of a protocol specification to mandate compliance with previous versions. HTTP/1.1 was deliberately
    23772393         designed, however, to make supporting previous versions easy. It is worth noting that, at the time of composing this specification
    23782394         (1996), we would expect commercial HTTP/1.1 servers to:
     
    23832399         <li>respond appropriately with a message in the same major version used by the client.</li>
    23842400      </ul>
    2385       <p id="rfc.section.C.p.4">And we would expect HTTP/1.1 clients to: </p>
     2401      <p id="rfc.section.B.p.4">And we would expect HTTP/1.1 clients to: </p>
    23862402      <ul>
    23872403         <li>recognize the format of the Status-Line for HTTP/1.0 and 1.1 responses;</li>
    23882404         <li>understand any valid response in the format of HTTP/0.9, 1.0, or 1.1.</li>
    23892405      </ul>
    2390       <p id="rfc.section.C.p.5">For most implementations of HTTP/1.0, each connection is established by the client prior to the request and closed by the
     2406      <p id="rfc.section.B.p.5">For most implementations of HTTP/1.0, each connection is established by the client prior to the request and closed by the
    23912407         server after sending the response. Some implementations implement the Keep-Alive version of persistent connections described
    23922408         in <a href="http://tools.ietf.org/html/rfc2068#section-19.7.1">Section 19.7.1</a> of <a href="#RFC2068" id="rfc.xref.RFC2068.6"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2068]</cite></a>.
    23932409      </p>
    2394       <h2 id="rfc.section.C.1"><a href="#rfc.section.C.1">C.1</a>&nbsp;<a id="changes.from.1.0" href="#changes.from.1.0">Changes from HTTP/1.0</a></h2>
    2395       <p id="rfc.section.C.1.p.1">This section summarizes major differences between versions HTTP/1.0 and HTTP/1.1.</p>
    2396       <h3 id="rfc.section.C.1.1"><a href="#rfc.section.C.1.1">C.1.1</a>&nbsp;<a id="changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses">Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses</a></h3>
    2397       <p id="rfc.section.C.1.1.p.1">The requirements that clients and servers support the Host request-header, report an error if the Host request-header (<a href="#header.host" id="rfc.xref.header.host.2" title="Host">Section&nbsp;8.4</a>) is missing from an HTTP/1.1 request, and accept absolute URIs (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>) are among the most important changes defined by this specification.
    2398       </p>
    2399       <p id="rfc.section.C.1.1.p.2">Older HTTP/1.0 clients assumed a one-to-one relationship of IP addresses and servers; there was no other established mechanism
     2410      <h2 id="rfc.section.B.1"><a href="#rfc.section.B.1">B.1</a>&nbsp;<a id="changes.from.1.0" href="#changes.from.1.0">Changes from HTTP/1.0</a></h2>
     2411      <p id="rfc.section.B.1.p.1">This section summarizes major differences between versions HTTP/1.0 and HTTP/1.1.</p>
     2412      <h3 id="rfc.section.B.1.1"><a href="#rfc.section.B.1.1">B.1.1</a>&nbsp;<a id="changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses" href="#changes.to.simplify.multi-homed.web.servers.and.conserve.ip.addresses">Changes to Simplify Multi-homed Web Servers and Conserve IP Addresses</a></h3>
     2413      <p id="rfc.section.B.1.1.p.1">The requirements that clients and servers support the Host request-header, report an error if the Host request-header (<a href="#header.host" id="rfc.xref.header.host.2" title="Host">Section&nbsp;8.4</a>) is missing from an HTTP/1.1 request, and accept absolute URIs (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>) are among the most important changes defined by this specification.
     2414      </p>
     2415      <p id="rfc.section.B.1.1.p.2">Older HTTP/1.0 clients assumed a one-to-one relationship of IP addresses and servers; there was no other established mechanism
    24002416         for distinguishing the intended server of a request than the IP address to which that request was directed. The changes outlined
    24012417         above will allow the Internet, once older HTTP clients are no longer common, to support multiple Web sites from a single IP
     
    24162432         </li>
    24172433      </ul>
    2418       <h2 id="rfc.section.C.2"><a href="#rfc.section.C.2">C.2</a>&nbsp;<a id="compatibility.with.http.1.0.persistent.connections" href="#compatibility.with.http.1.0.persistent.connections">Compatibility with HTTP/1.0 Persistent Connections</a></h2>
    2419       <p id="rfc.section.C.2.p.1">Some clients and servers might wish to be compatible with some previous implementations of persistent connections in HTTP/1.0
     2434      <h2 id="rfc.section.B.2"><a href="#rfc.section.B.2">B.2</a>&nbsp;<a id="compatibility.with.http.1.0.persistent.connections" href="#compatibility.with.http.1.0.persistent.connections">Compatibility with HTTP/1.0 Persistent Connections</a></h2>
     2435      <p id="rfc.section.B.2.p.1">Some clients and servers might wish to be compatible with some previous implementations of persistent connections in HTTP/1.0
    24202436         clients and servers. Persistent connections in HTTP/1.0 are explicitly negotiated as they are not the default behavior. HTTP/1.0
    24212437         experimental implementations of persistent connections are faulty, and the new facilities in HTTP/1.1 are designed to rectify
     
    24252441         from using Keep-Alive when talking to proxies.
    24262442      </p>
    2427       <p id="rfc.section.C.2.p.2">However, talking to proxies is the most important use of persistent connections, so that prohibition is clearly unacceptable.
     2443      <p id="rfc.section.B.2.p.2">However, talking to proxies is the most important use of persistent connections, so that prohibition is clearly unacceptable.
    24282444         Therefore, we need some other mechanism for indicating a persistent connection is desired, which is safe to use even when
    24292445         talking to an old proxy that ignores Connection. Persistent connections are the default for HTTP/1.1 messages; we introduce
    24302446         a new keyword (Connection: close) for declaring non-persistence. See <a href="#header.connection" id="rfc.xref.header.connection.7" title="Connection">Section&nbsp;8.1</a>.
    24312447      </p>
    2432       <p id="rfc.section.C.2.p.3">The original HTTP/1.0 form of persistent connections (the Connection: Keep-Alive and Keep-Alive header) is documented in <a href="#RFC2068" id="rfc.xref.RFC2068.7"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2068]</cite></a>.
    2433       </p>
    2434       <h2 id="rfc.section.C.3"><a href="#rfc.section.C.3">C.3</a>&nbsp;<a id="changes.from.rfc.2068" href="#changes.from.rfc.2068">Changes from RFC 2068</a></h2>
    2435       <p id="rfc.section.C.3.p.1">This specification has been carefully audited to correct and disambiguate key word usage; RFC 2068 had many problems in respect
     2448      <p id="rfc.section.B.2.p.3">The original HTTP/1.0 form of persistent connections (the Connection: Keep-Alive and Keep-Alive header) is documented in <a href="#RFC2068" id="rfc.xref.RFC2068.7"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2068]</cite></a>.
     2449      </p>
     2450      <h2 id="rfc.section.B.3"><a href="#rfc.section.B.3">B.3</a>&nbsp;<a id="changes.from.rfc.2068" href="#changes.from.rfc.2068">Changes from RFC 2068</a></h2>
     2451      <p id="rfc.section.B.3.p.1">This specification has been carefully audited to correct and disambiguate key word usage; RFC 2068 had many problems in respect
    24362452         to the conventions laid out in <a href="#RFC2119" id="rfc.xref.RFC2119.2"><cite title="Key words for use in RFCs to Indicate Requirement Levels">[RFC2119]</cite></a>.
    24372453      </p>
    2438       <p id="rfc.section.C.3.p.2">Transfer-coding and message lengths all interact in ways that required fixing exactly when chunked encoding is used (to allow
     2454      <p id="rfc.section.B.3.p.2">Transfer-coding and message lengths all interact in ways that required fixing exactly when chunked encoding is used (to allow
    24392455         for transfer encoding that may not be self delimiting); it was important to straighten out exactly how message lengths are
    24402456         computed. (Sections <a href="#transfer.codings" title="Transfer Codings">3.3</a>, <a href="#message.length" title="Message Length">4.4</a>, <a href="#header.content-length" id="rfc.xref.header.content-length.3" title="Content-Length">8.2</a>, see also <a href="#Part3" id="rfc.xref.Part3.13"><cite title="HTTP/1.1, part 3: Message Payload and Content Negotiation">[Part3]</cite></a>, <a href="#Part5" id="rfc.xref.Part5.1"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a> and <a href="#Part6" id="rfc.xref.Part6.8"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a>)
    24412457      </p>
    2442       <p id="rfc.section.C.3.p.3">The use and interpretation of HTTP version numbers has been clarified by <a href="#RFC2145" id="rfc.xref.RFC2145.3"><cite title="Use and Interpretation of HTTP Version Numbers">[RFC2145]</cite></a>. Require proxies to upgrade requests to highest protocol version they support to deal with problems discovered in HTTP/1.0
     2458      <p id="rfc.section.B.3.p.3">The use and interpretation of HTTP version numbers has been clarified by <a href="#RFC2145" id="rfc.xref.RFC2145.3"><cite title="Use and Interpretation of HTTP Version Numbers">[RFC2145]</cite></a>. Require proxies to upgrade requests to highest protocol version they support to deal with problems discovered in HTTP/1.0
    24432459         implementations (<a href="#http.version" title="HTTP Version">Section&nbsp;3.1</a>)
    24442460      </p>
    2445       <p id="rfc.section.C.3.p.4">Transfer-coding had significant problems, particularly with interactions with chunked encoding. The solution is that transfer-codings
     2461      <p id="rfc.section.B.3.p.4">Transfer-coding had significant problems, particularly with interactions with chunked encoding. The solution is that transfer-codings
    24462462         become as full fledged as content-codings. This involves adding an IANA registry for transfer-codings (separate from content
    24472463         codings), a new header field (TE) and enabling trailer headers in the future. Transfer encoding is a major performance benefit,
     
    24492465         authentication trailers, chunked encoding and HTTP/1.0 clients.(Section <a href="#transfer.codings" title="Transfer Codings">3.3</a>, <a href="#chunked.transfer.encoding" title="Chunked Transfer Coding">3.3.1</a>, and <a href="#header.te" id="rfc.xref.header.te.4" title="TE">8.5</a>)
    24502466      </p>
    2451       <h2 id="rfc.section.C.4"><a href="#rfc.section.C.4">C.4</a>&nbsp;<a id="changes.from.rfc.2616" href="#changes.from.rfc.2616">Changes from RFC 2616</a></h2>
    2452       <p id="rfc.section.C.4.p.1">The CHAR rule does not allow the NUL character anymore (this affects the comment and quoted-string rules). Furthermore, the
    2453          quoted-pair rule does not allow escaping NUL, CR or LF anymore. (<a href="#basic.rules" title="Basic Rules">Section&nbsp;1.2.2</a>)
    2454       </p>
    2455       <p id="rfc.section.C.4.p.2">Clarify that HTTP-Version is case sensitive. (<a href="#http.version" title="HTTP Version">Section&nbsp;3.1</a>)
    2456       </p>
    2457       <p id="rfc.section.C.4.p.3">Remove reference to non-existant identity transfer-coding value tokens. (Sections <a href="#transfer.codings" title="Transfer Codings">3.3</a> and <a href="#message.length" title="Message Length">4.4</a>)
    2458       </p>
    2459       <p id="rfc.section.C.4.p.4">Clarification that the chunk length does not include the count of the octets in the chunk header and trailer. (<a href="#chunked.transfer.encoding" title="Chunked Transfer Coding">Section&nbsp;3.3.1</a>)
    2460       </p>
    2461       <p id="rfc.section.C.4.p.5">Update use of abs_path production from RFC1808 to the path-absolute + query components of RFC3986. (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>)
    2462       </p>
    2463       <p id="rfc.section.C.4.p.6">Clarify exactly when close connection options must be sent. (<a href="#header.connection" id="rfc.xref.header.connection.8" title="Connection">Section&nbsp;8.1</a>)
    2464       </p>
    2465       <h1 id="rfc.section.D"><a href="#rfc.section.D">D.</a>&nbsp;<a id="terminology" href="#terminology">Terminology</a></h1>
    2466       <p id="rfc.section.D.p.1">This specification uses a number of terms to refer to the roles played by participants in, and objects of, the HTTP communication.</p>
    2467       <p id="rfc.section.D.p.2"> <span id="rfc.iref.c.3"></span>  <dfn>connection</dfn> 
     2467      <h2 id="rfc.section.B.4"><a href="#rfc.section.B.4">B.4</a>&nbsp;<a id="changes.from.rfc.2616" href="#changes.from.rfc.2616">Changes from RFC 2616</a></h2>
     2468      <p id="rfc.section.B.4.p.1">Rules about implicit linear white space between certain grammar productions have been removed; now it's only allowed when
     2469         specifically pointed out in the ABNF. The CHAR rule does not allow the NUL character anymore (this affects the comment and
     2470         quoted-string rules). Furthermore, the quoted-pair rule does not allow escaping NUL, CR or LF anymore. (<a href="#basic.rules" title="Basic Rules">Section&nbsp;1.2.2</a>)
     2471      </p>
     2472      <p id="rfc.section.B.4.p.2">Clarify that HTTP-Version is case sensitive. (<a href="#http.version" title="HTTP Version">Section&nbsp;3.1</a>)
     2473      </p>
     2474      <p id="rfc.section.B.4.p.3">Remove reference to non-existant identity transfer-coding value tokens. (Sections <a href="#transfer.codings" title="Transfer Codings">3.3</a> and <a href="#message.length" title="Message Length">4.4</a>)
     2475      </p>
     2476      <p id="rfc.section.B.4.p.4">Clarification that the chunk length does not include the count of the octets in the chunk header and trailer. (<a href="#chunked.transfer.encoding" title="Chunked Transfer Coding">Section&nbsp;3.3.1</a>)
     2477      </p>
     2478      <p id="rfc.section.B.4.p.5">Update use of abs_path production from RFC1808 to the path-absolute + query components of RFC3986. (<a href="#request-target" title="request-target">Section&nbsp;5.1.2</a>)
     2479      </p>
     2480      <p id="rfc.section.B.4.p.6">Clarify exactly when close connection options must be sent. (<a href="#header.connection" id="rfc.xref.header.connection.8" title="Connection">Section&nbsp;8.1</a>)
     2481      </p>
     2482      <h1 id="rfc.section.C"><a href="#rfc.section.C">C.</a>&nbsp;<a id="terminology" href="#terminology">Terminology</a></h1>
     2483      <p id="rfc.section.C.p.1">This specification uses a number of terms to refer to the roles played by participants in, and objects of, the HTTP communication.</p>
     2484      <p id="rfc.section.C.p.2"> <span id="rfc.iref.c.3"></span>  <dfn>connection</dfn> 
    24682485      </p>
    24692486      <dl class="empty">
    24702487         <dd>A transport layer virtual circuit established between two programs for the purpose of communication.</dd>
    24712488      </dl>
    2472       <p id="rfc.section.D.p.3"> <span id="rfc.iref.m.4"></span>  <dfn>message</dfn> 
     2489      <p id="rfc.section.C.p.3"> <span id="rfc.iref.m.4"></span>  <dfn>message</dfn> 
    24732490      </p>
    24742491      <dl class="empty">
     
    24762493         </dd>
    24772494      </dl>
    2478       <p id="rfc.section.D.p.4"> <span id="rfc.iref.r.1"></span>  <dfn>request</dfn> 
     2495      <p id="rfc.section.C.p.4"> <span id="rfc.iref.r.1"></span>  <dfn>request</dfn> 
    24792496      </p>
    24802497      <dl class="empty">
     
    24822499         </dd>
    24832500      </dl>
    2484       <p id="rfc.section.D.p.5"> <span id="rfc.iref.r.2"></span>  <dfn>response</dfn> 
     2501      <p id="rfc.section.C.p.5"> <span id="rfc.iref.r.2"></span>  <dfn>response</dfn> 
    24852502      </p>
    24862503      <dl class="empty">
     
    24882505         </dd>
    24892506      </dl>
    2490       <p id="rfc.section.D.p.6"> <span id="rfc.iref.r.3"></span>  <dfn>resource</dfn> 
     2507      <p id="rfc.section.C.p.6"> <span id="rfc.iref.r.3"></span>  <dfn>resource</dfn> 
    24912508      </p>
    24922509      <dl class="empty">
     
    24952512         </dd>
    24962513      </dl>
    2497       <p id="rfc.section.D.p.7"> <span id="rfc.iref.e.1"></span>  <dfn>entity</dfn> 
     2514      <p id="rfc.section.C.p.7"> <span id="rfc.iref.e.1"></span>  <dfn>entity</dfn> 
    24982515      </p>
    24992516      <dl class="empty">
     
    25022519         </dd>
    25032520      </dl>
    2504       <p id="rfc.section.D.p.8"> <span id="rfc.iref.r.4"></span>  <dfn>representation</dfn> 
     2521      <p id="rfc.section.C.p.8"> <span id="rfc.iref.r.4"></span>  <dfn>representation</dfn> 
    25052522      </p>
    25062523      <dl class="empty">
     
    25082525         </dd>
    25092526      </dl>
    2510       <p id="rfc.section.D.p.9"> <span id="rfc.iref.c.4"></span>  <dfn>content negotiation</dfn> 
     2527      <p id="rfc.section.C.p.9"> <span id="rfc.iref.c.4"></span>  <dfn>content negotiation</dfn> 
    25112528      </p>
    25122529      <dl class="empty">
     
    25142531         </dd>
    25152532      </dl>
    2516       <p id="rfc.section.D.p.10"> <span id="rfc.iref.v.2"></span>  <dfn>variant</dfn> 
     2533      <p id="rfc.section.C.p.10"> <span id="rfc.iref.v.2"></span>  <dfn>variant</dfn> 
    25172534      </p>
    25182535      <dl class="empty">
     
    25212538         </dd>
    25222539      </dl>
    2523       <p id="rfc.section.D.p.11"> <span id="rfc.iref.c.5"></span>  <dfn>client</dfn> 
     2540      <p id="rfc.section.C.p.11"> <span id="rfc.iref.c.5"></span>  <dfn>client</dfn> 
    25242541      </p>
    25252542      <dl class="empty">
    25262543         <dd>A program that establishes connections for the purpose of sending requests.</dd>
    25272544      </dl>
    2528       <p id="rfc.section.D.p.12"> <span id="rfc.iref.u.4"></span>  <dfn>user agent</dfn> 
     2545      <p id="rfc.section.C.p.12"> <span id="rfc.iref.u.4"></span>  <dfn>user agent</dfn> 
    25292546      </p>
    25302547      <dl class="empty">
     
    25332550         </dd>
    25342551      </dl>
    2535       <p id="rfc.section.D.p.13"> <span id="rfc.iref.s.1"></span>  <dfn>server</dfn> 
     2552      <p id="rfc.section.C.p.13"> <span id="rfc.iref.s.1"></span>  <dfn>server</dfn> 
    25362553      </p>
    25372554      <dl class="empty">
     
    25422559         </dd>
    25432560      </dl>
    2544       <p id="rfc.section.D.p.14"> <span id="rfc.iref.o.1"></span>  <dfn>origin server</dfn> 
     2561      <p id="rfc.section.C.p.14"> <span id="rfc.iref.o.1"></span>  <dfn>origin server</dfn> 
    25452562      </p>
    25462563      <dl class="empty">
    25472564         <dd>The server on which a given resource resides or is to be created.</dd>
    25482565      </dl>
    2549       <p id="rfc.section.D.p.15"> <span id="rfc.iref.p.1"></span>  <dfn>proxy</dfn> 
     2566      <p id="rfc.section.C.p.15"> <span id="rfc.iref.p.1"></span>  <dfn>proxy</dfn> 
    25502567      </p>
    25512568      <dl class="empty">
     
    25582575         </dd>
    25592576      </dl>
    2560       <p id="rfc.section.D.p.16"> <span id="rfc.iref.g.98"></span>  <dfn>gateway</dfn> 
     2577      <p id="rfc.section.C.p.16"> <span id="rfc.iref.g.108"></span>  <dfn>gateway</dfn> 
    25612578      </p>
    25622579      <dl class="empty">
     
    25652582         </dd>
    25662583      </dl>
    2567       <p id="rfc.section.D.p.17"> <span id="rfc.iref.t.4"></span>  <dfn>tunnel</dfn> 
     2584      <p id="rfc.section.C.p.17"> <span id="rfc.iref.t.4"></span>  <dfn>tunnel</dfn> 
    25682585      </p>
    25692586      <dl class="empty">
     
    25732590         </dd>
    25742591      </dl>
    2575       <p id="rfc.section.D.p.18"> <span id="rfc.iref.c.6"></span>  <dfn>cache</dfn> 
     2592      <p id="rfc.section.C.p.18"> <span id="rfc.iref.c.6"></span>  <dfn>cache</dfn> 
    25762593      </p>
    25772594      <dl class="empty">
     
    25812598         </dd>
    25822599      </dl>
    2583       <p id="rfc.section.D.p.19"> <span id="rfc.iref.c.7"></span>  <dfn>cacheable</dfn> 
     2600      <p id="rfc.section.C.p.19"> <span id="rfc.iref.c.7"></span>  <dfn>cacheable</dfn> 
    25842601      </p>
    25852602      <dl class="empty">
     
    25892606         </dd>
    25902607      </dl>
    2591       <p id="rfc.section.D.p.20"> <span id="rfc.iref.u.5"></span>  <span id="rfc.iref.d.2"></span>  <dfn>upstream</dfn>/<dfn>downstream</dfn> 
     2608      <p id="rfc.section.C.p.20"> <span id="rfc.iref.u.5"></span>  <span id="rfc.iref.d.2"></span>  <dfn>upstream</dfn>/<dfn>downstream</dfn> 
    25922609      </p>
    25932610      <dl class="empty">
    25942611         <dd>Upstream and downstream describe the flow of a message: all messages flow from upstream to downstream.</dd>
    25952612      </dl>
    2596       <p id="rfc.section.D.p.21"> <span id="rfc.iref.i.2"></span>  <span id="rfc.iref.o.2"></span>  <dfn>inbound</dfn>/<dfn>outbound</dfn> 
     2613      <p id="rfc.section.C.p.21"> <span id="rfc.iref.i.2"></span>  <span id="rfc.iref.o.2"></span>  <dfn>inbound</dfn>/<dfn>outbound</dfn> 
    25972614      </p>
    25982615      <dl class="empty">
     
    26012618         </dd>
    26022619      </dl>
    2603       <h1 id="rfc.section.E"><a href="#rfc.section.E">E.</a>&nbsp;<a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1>
    2604       <h2 id="rfc.section.E.1"><a href="#rfc.section.E.1">E.1</a>&nbsp;Since RFC2616
     2620      <h1 id="rfc.section.D"><a href="#rfc.section.D">D.</a>&nbsp;<a id="change.log" href="#change.log">Change Log (to be removed by RFC Editor before publication)</a></h1>
     2621      <h2 id="rfc.section.D.1"><a href="#rfc.section.D.1">D.1</a>&nbsp;Since RFC2616
    26052622      </h2>
    2606       <p id="rfc.section.E.1.p.1">Extracted relevant partitions from <a href="#RFC2616" id="rfc.xref.RFC2616.3"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2616]</cite></a>.
    2607       </p>
    2608       <h2 id="rfc.section.E.2"><a href="#rfc.section.E.2">E.2</a>&nbsp;Since draft-ietf-httpbis-p1-messaging-00
     2623      <p id="rfc.section.D.1.p.1">Extracted relevant partitions from <a href="#RFC2616" id="rfc.xref.RFC2616.3"><cite title="Hypertext Transfer Protocol -- HTTP/1.1">[RFC2616]</cite></a>.
     2624      </p>
     2625      <h2 id="rfc.section.D.2"><a href="#rfc.section.D.2">D.2</a>&nbsp;Since draft-ietf-httpbis-p1-messaging-00
    26092626      </h2>
    2610       <p id="rfc.section.E.2.p.1">Closed issues: </p>
     2627      <p id="rfc.section.D.2.p.1">Closed issues: </p>
    26112628      <ul>
    26122629         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/1">http://tools.ietf.org/wg/httpbis/trac/ticket/1</a>&gt;: "HTTP Version should be case sensitive" (&lt;<a href="http://purl.org/NET/http-errata#verscase">http://purl.org/NET/http-errata#verscase</a>&gt;)
     
    26492666         </li>
    26502667      </ul>
    2651       <p id="rfc.section.E.2.p.2">Other changes: </p>
     2668      <p id="rfc.section.D.2.p.2">Other changes: </p>
    26522669      <ul>
    26532670         <li>Update media type registrations to use RFC4288 template.</li>
     
    26552672         </li>
    26562673      </ul>
    2657       <h2 id="rfc.section.E.3"><a href="#rfc.section.E.3">E.3</a>&nbsp;Since draft-ietf-httpbis-p1-messaging-01
     2674      <h2 id="rfc.section.D.3"><a href="#rfc.section.D.3">D.3</a>&nbsp;Since draft-ietf-httpbis-p1-messaging-01
    26582675      </h2>
    2659       <p id="rfc.section.E.3.p.1">Closed issues: </p>
     2676      <p id="rfc.section.D.3.p.1">Closed issues: </p>
    26602677      <ul>
    26612678         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/19">http://tools.ietf.org/wg/httpbis/trac/ticket/19</a>&gt;: "Bodies on GET (and other) requests"
     
    26682685         </li>
    26692686      </ul>
    2670       <p id="rfc.section.E.3.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
     2687      <p id="rfc.section.D.3.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
    26712688      </p>
    26722689      <ul>
    26732690         <li>Get rid of duplicate BNF rule names ("host" -&gt; "uri-host", "trailer" -&gt; "trailer-part").</li>
    2674          <li>Avoid underscore character in rule names ("http_URL" -&gt; "http-URI", "abs_path" -&gt; "path-absolute").</li>
    2675          <li>Add rules for terms imported from URI spec ("absolute-URI", "authority", "path-abempty", "path-absolute", "uri-host", "port",
    2676             "query").
     2691         <li>Avoid underscore character in rule names ("http_URL" -&gt; "http-URL", "abs_path" -&gt; "path-absolute").</li>
     2692         <li>Add rules for terms imported from URI spec ("absoluteURI", "authority", "path-absolute", "port", "query", "relativeURI", "host)
     2693            -- these will have to be updated when switching over to RFC3986.
    26772694         </li>
    26782695         <li>Synchronize core rules with RFC5234 (this includes a change to CHAR which now excludes NUL).</li>
     
    26832700         <li>Rewrite prose rule "token" in terms of "tchar", rewrite prose rule "TEXT".</li>
    26842701      </ul>
    2685       <h2 id="rfc.section.E.4"><a href="#rfc.section.E.4">E.4</a>&nbsp;<a id="changes.since.02" href="#changes.since.02">Since draft-ietf-httpbis-p1-messaging-02</a></h2>
    2686       <p id="rfc.section.E.4.p.1">Closed issues: </p>
     2702      <h2 id="rfc.section.D.4"><a href="#rfc.section.D.4">D.4</a>&nbsp;<a id="changes.since.02" href="#changes.since.02">Since draft-ietf-httpbis-p1-messaging-02</a></h2>
     2703      <p id="rfc.section.D.4.p.1">Closed issues: </p>
    26872704      <ul>
    26882705         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/51">http://tools.ietf.org/wg/httpbis/trac/ticket/51</a>&gt;: "HTTP-date vs. rfc1123-date"
     
    26912708         </li>
    26922709      </ul>
    2693       <p id="rfc.section.E.4.p.2">Ongoing work on IANA Message Header Registration (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/40">http://tools.ietf.org/wg/httpbis/trac/ticket/40</a>&gt;):
     2710      <p id="rfc.section.D.4.p.2">Ongoing work on IANA Message Header Registration (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/40">http://tools.ietf.org/wg/httpbis/trac/ticket/40</a>&gt;):
    26942711      </p>
    26952712      <ul>
    26962713         <li>Reference RFC 3984, and update header registrations for headers defined in this document.</li>
    26972714      </ul>
    2698       <p id="rfc.section.E.4.p.3">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
     2715      <p id="rfc.section.D.4.p.3">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
    26992716      </p>
    27002717      <ul>
    27012718         <li>Replace string literals when the string really is case-sensitive (HTTP-Version).</li>
    27022719      </ul>
    2703       <h2 id="rfc.section.E.5"><a href="#rfc.section.E.5">E.5</a>&nbsp;<a id="changes.since.03" href="#changes.since.03">Since draft-ietf-httpbis-p1-messaging-03</a></h2>
    2704       <p id="rfc.section.E.5.p.1">Closed issues: </p>
     2720      <h2 id="rfc.section.D.5"><a href="#rfc.section.D.5">D.5</a>&nbsp;<a id="changes.since.03" href="#changes.since.03">Since draft-ietf-httpbis-p1-messaging-03</a></h2>
     2721      <p id="rfc.section.D.5.p.1">Closed issues: </p>
    27052722      <ul>
    27062723         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/28">http://tools.ietf.org/wg/httpbis/trac/ticket/28</a>&gt;: "Connection closing"
     
    27172734         </li>
    27182735      </ul>
    2719       <p id="rfc.section.E.5.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
     2736      <p id="rfc.section.D.5.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
    27202737      </p>
    27212738      <ul>
     
    27232740         <li>Replace HEX by HEXDIG for future consistence with RFC 5234's core rules.</li>
    27242741      </ul>
    2725       <h2 id="rfc.section.E.6"><a href="#rfc.section.E.6">E.6</a>&nbsp;<a id="changes.since.04" href="#changes.since.04">Since draft-ietf-httpbis-p1-messaging-04</a></h2>
    2726       <p id="rfc.section.E.6.p.1">Closed issues: </p>
     2742      <h2 id="rfc.section.D.6"><a href="#rfc.section.D.6">D.6</a>&nbsp;<a id="changes.since.04" href="#changes.since.04">Since draft-ietf-httpbis-p1-messaging-04</a></h2>
     2743      <p id="rfc.section.D.6.p.1">Closed issues: </p>
    27272744      <ul>
     2745         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/34">http://tools.ietf.org/wg/httpbis/trac/ticket/34</a>&gt;: "Out-of-date reference for URIs"
     2746         </li>
    27282747         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/132">http://tools.ietf.org/wg/httpbis/trac/ticket/132</a>&gt;: "RFC 2822 is updated by RFC 5322"
    27292748         </li>
    27302749      </ul>
    2731       <p id="rfc.section.E.6.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
     2750      <p id="rfc.section.D.6.p.2">Ongoing work on ABNF conversion (&lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/36">http://tools.ietf.org/wg/httpbis/trac/ticket/36</a>&gt;):
    27322751      </p>
    27332752      <ul>
    27342753         <li>Use "/" instead of "|" for alternatives.</li>
    27352754         <li>Get rid of RFC822 dependency; use RFC5234 plus extensions instead.</li>
     2755         <li>Only reference RFC 5234's core rules.</li>
     2756         <li>Introduce new ABNF rules for "bad" whitespace ("BWS"), optional whitespace ("OWS") and required whitespace ("RWS").</li>
     2757         <li>Rewrite ABNFs to spell out whitespace rules, factor out header value format definitions.</li>
     2758      </ul>
     2759      <h2 id="rfc.section.D.7"><a href="#rfc.section.D.7">D.7</a>&nbsp;<a id="changes.since.05" href="#changes.since.05">Since draft-ietf-httpbis-p1-messaging-05</a></h2>
     2760      <p id="rfc.section.D.7.p.1">Closed issues: </p>
     2761      <ul>
     2762         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/118">http://tools.ietf.org/wg/httpbis/trac/ticket/118</a>&gt;: "Join "Differences Between HTTP Entities and RFC 2045 Entities"?"
     2763         </li>
     2764         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/134">http://tools.ietf.org/wg/httpbis/trac/ticket/134</a>&gt;: "RFC822 reference left in discussion of date formats"
     2765         </li>
    27362766      </ul>
    27372767      <h1><a id="rfc.copyright" href="#rfc.copyright">Full Copyright Statement</a></h1>
     
    27692799            </li>
    27702800            <li class="indline0"><a id="rfc.index.C" href="#rfc.index.C"><b>C</b></a><ul class="ind">
    2771                   <li class="indline1">cache&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.6">D</a></li>
    2772                   <li class="indline1">cacheable&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.7">D</a></li>
    2773                   <li class="indline1">client&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.5">D</a></li>
    2774                   <li class="indline1">connection&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.3">D</a></li>
    2775                   <li class="indline1">Connection header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.connection.1">4.5</a>, <a class="iref" href="#rfc.xref.header.connection.2">7.1.2</a>, <a class="iref" href="#rfc.xref.header.connection.3">7.1.3</a>, <a class="iref" href="#rfc.iref.c.1"><b>8.1</b></a>, <a class="iref" href="#rfc.xref.header.connection.4">8.5</a>, <a class="iref" href="#rfc.xref.header.connection.5">8.8</a>, <a class="iref" href="#rfc.xref.header.connection.6">9.1</a>, <a class="iref" href="#rfc.xref.header.connection.7">C.2</a>, <a class="iref" href="#rfc.xref.header.connection.8">C.4</a></li>
    2776                   <li class="indline1">content negotiation&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.4">D</a></li>
    2777                   <li class="indline1">Content-Length header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.content-length.1">4.4</a>, <a class="iref" href="#rfc.iref.c.2"><b>8.2</b></a>, <a class="iref" href="#rfc.xref.header.content-length.2">9.1</a>, <a class="iref" href="#rfc.xref.header.content-length.3">C.3</a></li>
     2801                  <li class="indline1">cache&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.6">C</a></li>
     2802                  <li class="indline1">cacheable&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.7">C</a></li>
     2803                  <li class="indline1">client&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.5">C</a></li>
     2804                  <li class="indline1">connection&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.3">C</a></li>
     2805                  <li class="indline1">Connection header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.connection.1">4.5</a>, <a class="iref" href="#rfc.xref.header.connection.2">7.1.2</a>, <a class="iref" href="#rfc.xref.header.connection.3">7.1.3</a>, <a class="iref" href="#rfc.iref.c.1"><b>8.1</b></a>, <a class="iref" href="#rfc.xref.header.connection.4">8.5</a>, <a class="iref" href="#rfc.xref.header.connection.5">8.8</a>, <a class="iref" href="#rfc.xref.header.connection.6">9.1</a>, <a class="iref" href="#rfc.xref.header.connection.7">B.2</a>, <a class="iref" href="#rfc.xref.header.connection.8">B.4</a></li>
     2806                  <li class="indline1">content negotiation&nbsp;&nbsp;<a class="iref" href="#rfc.iref.c.4">C</a></li>
     2807                  <li class="indline1">Content-Length header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.content-length.1">4.4</a>, <a class="iref" href="#rfc.iref.c.2"><b>8.2</b></a>, <a class="iref" href="#rfc.xref.header.content-length.2">9.1</a>, <a class="iref" href="#rfc.xref.header.content-length.3">B.3</a></li>
    27782808               </ul>
    27792809            </li>
    27802810            <li class="indline0"><a id="rfc.index.D" href="#rfc.index.D"><b>D</b></a><ul class="ind">
    27812811                  <li class="indline1">Date header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.date.1">4.5</a>, <a class="iref" href="#rfc.iref.d.1"><b>8.3</b></a>, <a class="iref" href="#rfc.xref.header.date.2">9.1</a></li>
    2782                   <li class="indline1">downstream&nbsp;&nbsp;<a class="iref" href="#rfc.iref.d.2">D</a></li>
     2812                  <li class="indline1">downstream&nbsp;&nbsp;<a class="iref" href="#rfc.iref.d.2">C</a></li>
    27832813               </ul>
    27842814            </li>
    27852815            <li class="indline0"><a id="rfc.index.E" href="#rfc.index.E"><b>E</b></a><ul class="ind">
    2786                   <li class="indline1">entity&nbsp;&nbsp;<a class="iref" href="#rfc.iref.e.1">D</a></li>
     2816                  <li class="indline1">entity&nbsp;&nbsp;<a class="iref" href="#rfc.iref.e.1">C</a></li>
    27872817               </ul>
    27882818            </li>
    27892819            <li class="indline0"><a id="rfc.index.G" href="#rfc.index.G"><b>G</b></a><ul class="ind">
    2790                   <li class="indline1">gateway&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.98">D</a></li>
     2820                  <li class="indline1">gateway&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.108">C</a></li>
    27912821                  <li class="indline1"><tt>Grammar</tt>&nbsp;&nbsp;
    27922822                     <ul class="ind">
    2793                         <li class="indline1"><tt>absolute-URI</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.26"><b>2.1</b></a></li>
     2823                        <li class="indline1"><tt>absolute-URI</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.27"><b>2.1</b></a></li>
    27942824                        <li class="indline1">ALPHA&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.1"><b>1.2</b></a></li>
    2795                         <li class="indline1"><tt>asctime-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.39"><b>3.2.1</b></a></li>
    2796                         <li class="indline1"><tt>attribute</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.50"><b>3.3</b></a></li>
    2797                         <li class="indline1"><tt>authority</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.27"><b>2.1</b></a></li>
     2825                        <li class="indline1"><tt>asctime-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.40"><b>3.2.1</b></a></li>
     2826                        <li class="indline1"><tt>attribute</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.51"><b>3.3</b></a></li>
     2827                        <li class="indline1"><tt>authority</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.28"><b>2.1</b></a></li>
     2828                        <li class="indline1"><tt>BWS</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.16"><b>1.2.2</b></a></li>
    27982829                        <li class="indline1">CHAR&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.2"><b>1.2</b></a></li>
    2799                         <li class="indline1"><tt>chunk</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.53"><b>3.3.1</b></a></li>
    2800                         <li class="indline1"><tt>chunk-data</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.59"><b>3.3.1</b></a></li>
    2801                         <li class="indline1"><tt>chunk-ext-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.57"><b>3.3.1</b></a></li>
    2802                         <li class="indline1"><tt>chunk-ext-val</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.58"><b>3.3.1</b></a></li>
    2803                         <li class="indline1"><tt>chunk-extension</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.56"><b>3.3.1</b></a></li>
    2804                         <li class="indline1"><tt>chunk-size</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.54"><b>3.3.1</b></a></li>
    2805                         <li class="indline1"><tt>Chunked-Body</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.52"><b>3.3.1</b></a></li>
    2806                         <li class="indline1"><tt>comment</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.19"><b>1.2.2</b></a></li>
    2807                         <li class="indline1"><tt>Connection</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.82"><b>8.1</b></a></li>
    2808                         <li class="indline1"><tt>connection-token</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.83"><b>8.1</b></a></li>
    2809                         <li class="indline1"><tt>Content-Length</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.84"><b>8.2</b></a></li>
     2830                        <li class="indline1"><tt>chunk</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.54"><b>3.3.1</b></a></li>
     2831                        <li class="indline1"><tt>chunk-data</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.60"><b>3.3.1</b></a></li>
     2832                        <li class="indline1"><tt>chunk-ext</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.57"><b>3.3.1</b></a></li>
     2833                        <li class="indline1"><tt>chunk-ext-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.58"><b>3.3.1</b></a></li>
     2834                        <li class="indline1"><tt>chunk-ext-val</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.59"><b>3.3.1</b></a></li>
     2835                        <li class="indline1"><tt>chunk-size</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.55"><b>3.3.1</b></a></li>
     2836                        <li class="indline1"><tt>Chunked-Body</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.53"><b>3.3.1</b></a></li>
     2837                        <li class="indline1"><tt>comment</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.20"><b>1.2.2</b></a></li>
     2838                        <li class="indline1"><tt>Connection</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.83"><b>8.1</b></a></li>
     2839                        <li class="indline1"><tt>connection-token</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.85"><b>8.1</b></a></li>
     2840                        <li class="indline1"><tt>Connection-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.84"><b>8.1</b></a></li>
     2841                        <li class="indline1"><tt>Content-Length</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.86"><b>8.2</b></a></li>
     2842                        <li class="indline1"><tt>Content-Length-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.87"><b>8.2</b></a></li>
    28102843                        <li class="indline1">CR&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.3"><b>1.2</b></a></li>
    28112844                        <li class="indline1">CRLF&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.4"><b>1.2</b></a></li>
    2812                         <li class="indline1"><tt>ctext</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.20"><b>1.2.2</b></a></li>
     2845                        <li class="indline1"><tt>ctext</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.21"><b>1.2.2</b></a></li>
    28132846                        <li class="indline1">CTL&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.5"><b>1.2</b></a></li>
    2814                         <li class="indline1"><tt>Date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.85"><b>8.3</b></a></li>
    2815                         <li class="indline1"><tt>date1</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.40"><b>3.2.1</b></a></li>
    2816                         <li class="indline1"><tt>date2</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.41"><b>3.2.1</b></a></li>
    2817                         <li class="indline1"><tt>date3</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.42"><b>3.2.1</b></a></li>
     2847                        <li class="indline1"><tt>Date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.88"><b>8.3</b></a></li>
     2848                        <li class="indline1"><tt>Date-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.89"><b>8.3</b></a></li>
     2849                        <li class="indline1"><tt>date1</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.41"><b>3.2.1</b></a></li>
     2850                        <li class="indline1"><tt>date2</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.42"><b>3.2.1</b></a></li>
     2851                        <li class="indline1"><tt>date3</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.43"><b>3.2.1</b></a></li>
    28182852                        <li class="indline1">DIGIT&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.6"><b>1.2</b></a></li>
    28192853                        <li class="indline1">DQUOTE&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.7"><b>1.2</b></a></li>
    2820                         <li class="indline1"><tt>extension-code</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.80"><b>6.1.1</b></a></li>
    2821                         <li class="indline1"><tt>extension-method</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.75"><b>5.1.1</b></a></li>
    2822                         <li class="indline1"><tt>field-content</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.69"><b>4.2</b></a></li>
    2823                         <li class="indline1"><tt>field-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.67"><b>4.2</b></a></li>
    2824                         <li class="indline1"><tt>field-value</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.68"><b>4.2</b></a></li>
    2825                         <li class="indline1"><tt>general-header</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.71"><b>4.5</b></a></li>
    2826                         <li class="indline1"><tt>generic-message</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.64"><b>4.1</b></a></li>
     2854                        <li class="indline1"><tt>extension-code</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.81"><b>6.1.1</b></a></li>
     2855                        <li class="indline1"><tt>extension-method</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.76"><b>5.1.1</b></a></li>
     2856                        <li class="indline1"><tt>field-content</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.70"><b>4.2</b></a></li>
     2857                        <li class="indline1"><tt>field-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.68"><b>4.2</b></a></li>
     2858                        <li class="indline1"><tt>field-value</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.69"><b>4.2</b></a></li>
     2859                        <li class="indline1"><tt>general-header</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.72"><b>4.5</b></a></li>
     2860                        <li class="indline1"><tt>generic-message</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.65"><b>4.1</b></a></li>
    28272861                        <li class="indline1">HEXDIG&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.8"><b>1.2</b></a></li>
    2828                         <li class="indline1"><tt>Host</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.86"><b>8.4</b></a></li>
     2862                        <li class="indline1"><tt>Host</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.90"><b>8.4</b></a></li>
     2863                        <li class="indline1"><tt>Host-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.91"><b>8.4</b></a></li>
    28292864                        <li class="indline1">HTAB&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.9"><b>1.2</b></a></li>
    2830                         <li class="indline1"><tt>HTTP-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.35"><b>3.2.1</b></a></li>
    2831                         <li class="indline1"><tt>HTTP-message</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.63"><b>4.1</b></a></li>
    2832                         <li class="indline1"><tt>HTTP-Prot-Name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.34"><b>3.1</b></a></li>
    2833                         <li class="indline1"><tt>http-URI</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.32"><b>2.1.1</b></a></li>
    2834                         <li class="indline1"><tt>HTTP-Version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.33"><b>3.1</b></a></li>
    2835                         <li class="indline1"><tt>last-chunk</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.55"><b>3.3.1</b></a></li>
     2865                        <li class="indline1"><tt>HTTP-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.36"><b>3.2.1</b></a></li>
     2866                        <li class="indline1"><tt>HTTP-message</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.64"><b>4.1</b></a></li>
     2867                        <li class="indline1"><tt>HTTP-Prot-Name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.35"><b>3.1</b></a></li>
     2868                        <li class="indline1"><tt>http-URI</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.33"><b>2.1.1</b></a></li>
     2869                        <li class="indline1"><tt>HTTP-Version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.34"><b>3.1</b></a></li>
     2870                        <li class="indline1"><tt>last-chunk</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.56"><b>3.3.1</b></a></li>
    28362871                        <li class="indline1">LF&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.10"><b>1.2</b></a></li>
    2837                         <li class="indline1"><tt>LWS</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.14"><b>1.2.2</b></a></li>
    2838                         <li class="indline1"><tt>message-body</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.70"><b>4.3</b></a></li>
    2839                         <li class="indline1"><tt>message-header</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.66"><b>4.2</b></a></li>
    2840                         <li class="indline1"><tt>Method</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.74"><b>5.1.1</b></a></li>
    2841                         <li class="indline1"><tt>month</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.46"><b>3.2.1</b></a></li>
    2842                         <li class="indline1"><tt>obsolete-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.37"><b>3.2.1</b></a></li>
     2872                        <li class="indline1"><tt>message-body</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.71"><b>4.3</b></a></li>
     2873                        <li class="indline1"><tt>message-header</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.67"><b>4.2</b></a></li>
     2874                        <li class="indline1"><tt>Method</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.75"><b>5.1.1</b></a></li>
     2875                        <li class="indline1"><tt>month</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.47"><b>3.2.1</b></a></li>
     2876                        <li class="indline1"><tt>obsolete-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.38"><b>3.2.1</b></a></li>
    28432877                        <li class="indline1">OCTET&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.11"><b>1.2</b></a></li>
    2844                         <li class="indline1"><tt>parameter</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.49"><b>3.3</b></a></li>
    2845                         <li class="indline1"><tt>path-absolute</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.28"><b>2.1</b></a></li>
    2846                         <li class="indline1"><tt>port</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.29"><b>2.1</b></a></li>
    2847                         <li class="indline1"><tt>product</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.61"><b>3.4</b></a></li>
    2848                         <li class="indline1"><tt>product-version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.62"><b>3.4</b></a></li>
    2849                         <li class="indline1"><tt>protocol-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.94"><b>8.9</b></a></li>
    2850                         <li class="indline1"><tt>protocol-version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.95"><b>8.9</b></a></li>
    2851                         <li class="indline1"><tt>pseudonym</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.97"><b>8.9</b></a></li>
    2852                         <li class="indline1"><tt>qdtext</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.22"><b>1.2.2</b></a></li>
    2853                         <li class="indline1"><tt>query</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.30"><b>2.1</b></a></li>
    2854                         <li class="indline1"><tt>quoted-pair</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.24"><b>1.2.2</b></a></li>
    2855                         <li class="indline1"><tt>quoted-string</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.21"><b>1.2.2</b></a></li>
    2856                         <li class="indline1"><tt>quoted-text</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.23"><b>1.2.2</b></a></li>
    2857                         <li class="indline1"><tt>Reason-Phrase</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.81"><b>6.1.1</b></a></li>
    2858                         <li class="indline1"><tt>received-by</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.96"><b>8.9</b></a></li>
    2859                         <li class="indline1"><tt>received-protocol</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.93"><b>8.9</b></a></li>
    2860                         <li class="indline1"><tt>Request</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.72"><b>5</b></a></li>
    2861                         <li class="indline1"><tt>Request-Line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.73"><b>5.1</b></a></li>
    2862                         <li class="indline1"><tt>request-target</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.76"><b>5.1.2</b></a></li>
    2863                         <li class="indline1"><tt>Response</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.77"><b>6</b></a></li>
    2864                         <li class="indline1"><tt>rfc1123-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.36"><b>3.2.1</b></a></li>
    2865                         <li class="indline1"><tt>rfc850-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.38"><b>3.2.1</b></a></li>
    2866                         <li class="indline1"><tt>separators</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.18"><b>1.2.2</b></a></li>
     2878                        <li class="indline1"><tt>OWS</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.14"><b>1.2.2</b></a></li>
     2879                        <li class="indline1"><tt>parameter</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.50"><b>3.3</b></a></li>
     2880                        <li class="indline1"><tt>path-absolute</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.29"><b>2.1</b></a></li>
     2881                        <li class="indline1"><tt>port</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.30"><b>2.1</b></a></li>
     2882                        <li class="indline1"><tt>product</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.62"><b>3.4</b></a></li>
     2883                        <li class="indline1"><tt>product-version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.63"><b>3.4</b></a></li>
     2884                        <li class="indline1"><tt>protocol-name</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.104"><b>8.9</b></a></li>
     2885                        <li class="indline1"><tt>protocol-version</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.105"><b>8.9</b></a></li>
     2886                        <li class="indline1"><tt>pseudonym</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.107"><b>8.9</b></a></li>
     2887                        <li class="indline1"><tt>qdtext</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.23"><b>1.2.2</b></a></li>
     2888                        <li class="indline1"><tt>query</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.31"><b>2.1</b></a></li>
     2889                        <li class="indline1"><tt>quoted-pair</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.25"><b>1.2.2</b></a></li>
     2890                        <li class="indline1"><tt>quoted-string</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.22"><b>1.2.2</b></a></li>
     2891                        <li class="indline1"><tt>quoted-text</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.24"><b>1.2.2</b></a></li>
     2892                        <li class="indline1"><tt>Reason-Phrase</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.82"><b>6.1.1</b></a></li>
     2893                        <li class="indline1"><tt>received-by</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.106"><b>8.9</b></a></li>
     2894                        <li class="indline1"><tt>received-protocol</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.103"><b>8.9</b></a></li>
     2895                        <li class="indline1"><tt>Request</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.73"><b>5</b></a></li>
     2896                        <li class="indline1"><tt>Request-Line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.74"><b>5.1</b></a></li>
     2897                        <li class="indline1"><tt>request-target</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.77"><b>5.1.2</b></a></li>
     2898                        <li class="indline1"><tt>Response</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.78"><b>6</b></a></li>
     2899                        <li class="indline1"><tt>rfc1123-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.37"><b>3.2.1</b></a></li>
     2900                        <li class="indline1"><tt>rfc850-date</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.39"><b>3.2.1</b></a></li>
     2901                        <li class="indline1"><tt>RWS</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.15"><b>1.2.2</b></a></li>
    28672902                        <li class="indline1">SP&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.12"><b>1.2</b></a></li>
    2868                         <li class="indline1"><tt>start-line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.65"><b>4.1</b></a></li>
    2869                         <li class="indline1"><tt>Status-Code</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.79"><b>6.1.1</b></a></li>
    2870                         <li class="indline1"><tt>Status-Line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.78"><b>6.1</b></a></li>
    2871                         <li class="indline1"><tt>t-codings</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.88"><b>8.5</b></a></li>
    2872                         <li class="indline1"><tt>tchar</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.17"><b>1.2.2</b></a></li>
    2873                         <li class="indline1"><tt>TE</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.87"><b>8.5</b></a></li>
    2874                         <li class="indline1"><tt>TEXT</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.15"><b>1.2.2</b></a></li>
    2875                         <li class="indline1"><tt>time</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.43"><b>3.2.1</b></a></li>
    2876                         <li class="indline1"><tt>token</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.16"><b>1.2.2</b></a></li>
    2877                         <li class="indline1"><tt>Trailer</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.89"><b>8.6</b></a></li>
    2878                         <li class="indline1"><tt>trailer-part</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.60"><b>3.3.1</b></a></li>
    2879                         <li class="indline1"><tt>transfer-coding</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.47"><b>3.3</b></a></li>
    2880                         <li class="indline1"><tt>Transfer-Encoding</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.90"><b>8.7</b></a></li>
    2881                         <li class="indline1"><tt>transfer-extension</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.48"><b>3.3</b></a></li>
    2882                         <li class="indline1"><tt>Upgrade</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.91"><b>8.8</b></a></li>
    2883                         <li class="indline1"><tt>uri-host</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.31"><b>2.1</b></a></li>
    2884                         <li class="indline1"><tt>URI-reference</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.25"><b>2.1</b></a></li>
    2885                         <li class="indline1"><tt>value</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.51"><b>3.3</b></a></li>
    2886                         <li class="indline1"><tt>Via</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.92"><b>8.9</b></a></li>
    2887                         <li class="indline1"><tt>weekday</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.45"><b>3.2.1</b></a></li>
    2888                         <li class="indline1"><tt>wkday</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.44"><b>3.2.1</b></a></li>
     2903                        <li class="indline1"><tt>start-line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.66"><b>4.1</b></a></li>
     2904                        <li class="indline1"><tt>Status-Code</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.80"><b>6.1.1</b></a></li>
     2905                        <li class="indline1"><tt>Status-Line</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.79"><b>6.1</b></a></li>
     2906                        <li class="indline1"><tt>t-codings</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.94"><b>8.5</b></a></li>
     2907                        <li class="indline1"><tt>tchar</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.19"><b>1.2.2</b></a></li>
     2908                        <li class="indline1"><tt>TE</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.92"><b>8.5</b></a></li>
     2909                        <li class="indline1"><tt>TE-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.93"><b>8.5</b></a></li>
     2910                        <li class="indline1"><tt>TEXT</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.17"><b>1.2.2</b></a></li>
     2911                        <li class="indline1"><tt>time</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.44"><b>3.2.1</b></a></li>
     2912                        <li class="indline1"><tt>token</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.18"><b>1.2.2</b></a></li>
     2913                        <li class="indline1"><tt>Trailer</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.95"><b>8.6</b></a></li>
     2914                        <li class="indline1"><tt>trailer-part</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.61"><b>3.3.1</b></a></li>
     2915                        <li class="indline1"><tt>Trailer-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.96"><b>8.6</b></a></li>
     2916                        <li class="indline1"><tt>transfer-coding</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.48"><b>3.3</b></a></li>
     2917                        <li class="indline1"><tt>Transfer-Encoding</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.97"><b>8.7</b></a></li>
     2918                        <li class="indline1"><tt>Transfer-Encoding-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.98"><b>8.7</b></a></li>
     2919                        <li class="indline1"><tt>transfer-extension</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.49"><b>3.3</b></a></li>
     2920                        <li class="indline1"><tt>Upgrade</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.99"><b>8.8</b></a></li>
     2921                        <li class="indline1"><tt>Upgrade-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.100"><b>8.8</b></a></li>
     2922                        <li class="indline1"><tt>uri-host</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.32"><b>2.1</b></a></li>
     2923                        <li class="indline1"><tt>URI-reference</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.26"><b>2.1</b></a></li>
     2924                        <li class="indline1"><tt>value</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.52"><b>3.3</b></a></li>
     2925                        <li class="indline1"><tt>Via</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.101"><b>8.9</b></a></li>
     2926                        <li class="indline1"><tt>Via-v</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.102"><b>8.9</b></a></li>
     2927                        <li class="indline1"><tt>weekday</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.46"><b>3.2.1</b></a></li>
     2928                        <li class="indline1"><tt>wkday</tt>&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.45"><b>3.2.1</b></a></li>
    28892929                        <li class="indline1">WSP&nbsp;&nbsp;<a class="iref" href="#rfc.iref.g.13"><b>1.2</b></a></li>
    28902930                     </ul>
     
    28952935                  <li class="indline1">Headers&nbsp;&nbsp;
    28962936                     <ul class="ind">
    2897                         <li class="indline1">Connection&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.connection.1">4.5</a>, <a class="iref" href="#rfc.xref.header.connection.2">7.1.2</a>, <a class="iref" href="#rfc.xref.header.connection.3">7.1.3</a>, <a class="iref" href="#rfc.iref.h.3"><b>8.1</b></a>, <a class="iref" href="#rfc.xref.header.connection.4">8.5</a>, <a class="iref" href="#rfc.xref.header.connection.5">8.8</a>, <a class="iref" href="#rfc.xref.header.connection.6">9.1</a>, <a class="iref" href="#rfc.xref.header.connection.7">C.2</a>, <a class="iref" href="#rfc.xref.header.connection.8">C.4</a></li>
    2898                         <li class="indline1">Content-Length&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.content-length.1">4.4</a>, <a class="iref" href="#rfc.iref.h.4"><b>8.2</b></a>, <a class="iref" href="#rfc.xref.header.content-length.2">9.1</a>, <a class="iref" href="#rfc.xref.header.content-length.3">C.3</a></li>
     2937                        <li class="indline1">Connection&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.connection.1">4.5</a>, <a class="iref" href="#rfc.xref.header.connection.2">7.1.2</a>, <a class="iref" href="#rfc.xref.header.connection.3">7.1.3</a>, <a class="iref" href="#rfc.iref.h.3"><b>8.1</b></a>, <a class="iref" href="#rfc.xref.header.connection.4">8.5</a>, <a class="iref" href="#rfc.xref.header.connection.5">8.8</a>, <a class="iref" href="#rfc.xref.header.connection.6">9.1</a>, <a class="iref" href="#rfc.xref.header.connection.7">B.2</a>, <a class="iref" href="#rfc.xref.header.connection.8">B.4</a></li>
     2938                        <li class="indline1">Content-Length&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.content-length.1">4.4</a>, <a class="iref" href="#rfc.iref.h.4"><b>8.2</b></a>, <a class="iref" href="#rfc.xref.header.content-length.2">9.1</a>, <a class="iref" href="#rfc.xref.header.content-length.3">B.3</a></li>
    28992939                        <li class="indline1">Date&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.date.1">4.5</a>, <a class="iref" href="#rfc.iref.h.5"><b>8.3</b></a>, <a class="iref" href="#rfc.xref.header.date.2">9.1</a></li>
    2900                         <li class="indline1">Host&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.7"><b>8.4</b></a>, <a class="iref" href="#rfc.xref.header.host.1">9.1</a>, <a class="iref" href="#rfc.xref.header.host.2">C.1.1</a></li>
    2901                         <li class="indline1">TE&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.te.1">3.3</a>, <a class="iref" href="#rfc.xref.header.te.2">3.3.1</a>, <a class="iref" href="#rfc.iref.h.8"><b>8.5</b></a>, <a class="iref" href="#rfc.xref.header.te.3">9.1</a>, <a class="iref" href="#rfc.xref.header.te.4">C.3</a></li>
     2940                        <li class="indline1">Host&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.7"><b>8.4</b></a>, <a class="iref" href="#rfc.xref.header.host.1">9.1</a>, <a class="iref" href="#rfc.xref.header.host.2">B.1.1</a></li>
     2941                        <li class="indline1">TE&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.te.1">3.3</a>, <a class="iref" href="#rfc.xref.header.te.2">3.3.1</a>, <a class="iref" href="#rfc.iref.h.8"><b>8.5</b></a>, <a class="iref" href="#rfc.xref.header.te.3">9.1</a>, <a class="iref" href="#rfc.xref.header.te.4">B.3</a></li>
    29022942                        <li class="indline1">Trailer&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.trailer.1">3.3.1</a>, <a class="iref" href="#rfc.xref.header.trailer.2">4.5</a>, <a class="iref" href="#rfc.iref.h.9"><b>8.6</b></a>, <a class="iref" href="#rfc.xref.header.trailer.3">9.1</a></li>
    29032943                        <li class="indline1">Transfer-Encoding&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.transfer-encoding.1">3.3</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.2">4.3</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.3">4.4</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.4">4.5</a>, <a class="iref" href="#rfc.iref.h.10"><b>8.7</b></a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.5">9.1</a></li>
     
    29062946                     </ul>
    29072947                  </li>
    2908                   <li class="indline1">Host header&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.6"><b>8.4</b></a>, <a class="iref" href="#rfc.xref.header.host.1">9.1</a>, <a class="iref" href="#rfc.xref.header.host.2">C.1.1</a></li>
     2948                  <li class="indline1">Host header&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.6"><b>8.4</b></a>, <a class="iref" href="#rfc.xref.header.host.1">9.1</a>, <a class="iref" href="#rfc.xref.header.host.2">B.1.1</a></li>
    29092949                  <li class="indline1">http URI scheme&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.1"><b>2.1.1</b></a></li>
    29102950                  <li class="indline1">https URI scheme&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.2">2.1.1</a></li>
     
    29132953            <li class="indline0"><a id="rfc.index.I" href="#rfc.index.I"><b>I</b></a><ul class="ind">
    29142954                  <li class="indline1">implied *LWS&nbsp;&nbsp;<a class="iref" href="#rfc.iref.i.1"><b>1.2.1.2</b></a></li>
    2915                   <li class="indline1">inbound&nbsp;&nbsp;<a class="iref" href="#rfc.iref.i.2">D</a></li>
     2955                  <li class="indline1">inbound&nbsp;&nbsp;<a class="iref" href="#rfc.iref.i.2">C</a></li>
    29162956                  <li class="indline1"><em>ISO-8859-1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.ISO-8859-1.1">1.2.2</a>, <a class="iref" href="#ISO-8859-1"><b>12.1</b></a></li>
    29172957               </ul>
     
    29282968                     </ul>
    29292969                  </li>
    2930                   <li class="indline1">message&nbsp;&nbsp;<a class="iref" href="#rfc.iref.m.4">D</a></li>
     2970                  <li class="indline1">message&nbsp;&nbsp;<a class="iref" href="#rfc.iref.m.4">C</a></li>
    29312971                  <li class="indline1">message/http Media Type&nbsp;&nbsp;<a class="iref" href="#rfc.iref.m.2"><b>9.3.1</b></a></li>
    29322972               </ul>
    29332973            </li>
    29342974            <li class="indline0"><a id="rfc.index.N" href="#rfc.index.N"><b>N</b></a><ul class="ind">
    2935                   <li class="indline1"><em>Nie1997</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Nie1997.1">7.1.1</a>, <a class="iref" href="#Nie1997"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.Nie1997.2">C.3</a></li>
     2975                  <li class="indline1"><em>Nie1997</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Nie1997.1">7.1.1</a>, <a class="iref" href="#Nie1997"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.Nie1997.2">B.3</a></li>
    29362976               </ul>
    29372977            </li>
    29382978            <li class="indline0"><a id="rfc.index.O" href="#rfc.index.O"><b>O</b></a><ul class="ind">
    2939                   <li class="indline1">origin server&nbsp;&nbsp;<a class="iref" href="#rfc.iref.o.1">D</a></li>
    2940                   <li class="indline1">outbound&nbsp;&nbsp;<a class="iref" href="#rfc.iref.o.2">D</a></li>
     2979                  <li class="indline1">origin server&nbsp;&nbsp;<a class="iref" href="#rfc.iref.o.1">C</a></li>
     2980                  <li class="indline1">outbound&nbsp;&nbsp;<a class="iref" href="#rfc.iref.o.2">C</a></li>
    29412981               </ul>
    29422982            </li>
     
    29562996                     </ul>
    29572997                  </li>
    2958                   <li class="indline1"><em>Part3</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.1">1</a>, <a class="iref" href="#rfc.xref.Part3.2">1.2.2</a>, <a class="iref" href="#rfc.xref.Part3.3">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.4">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.5">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.6">3.3</a>, <a class="iref" href="#rfc.xref.Part3.7">3.3</a>, <a class="iref" href="#rfc.xref.Part3.8">4.2</a>, <a class="iref" href="#rfc.xref.Part3.9">5</a>, <a class="iref" href="#rfc.xref.Part3.10">6</a>, <a class="iref" href="#rfc.xref.Part3.11">8.5</a>, <a class="iref" href="#Part3"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part3.12">A</a>, <a class="iref" href="#rfc.xref.Part3.13">C.3</a>, <a class="iref" href="#rfc.xref.Part3.14">D</a>, <a class="iref" href="#rfc.xref.Part3.15">D</a>, <a class="iref" href="#rfc.xref.Part3.16">D</a><ul class="ind">
     2998                  <li class="indline1"><em>Part3</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.1">1</a>, <a class="iref" href="#rfc.xref.Part3.2">1.2.2</a>, <a class="iref" href="#rfc.xref.Part3.3">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.4">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.5">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.6">3.3</a>, <a class="iref" href="#rfc.xref.Part3.7">3.3</a>, <a class="iref" href="#rfc.xref.Part3.8">4.2</a>, <a class="iref" href="#rfc.xref.Part3.9">5</a>, <a class="iref" href="#rfc.xref.Part3.10">6</a>, <a class="iref" href="#rfc.xref.Part3.11">8.5</a>, <a class="iref" href="#Part3"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part3.12">A</a>, <a class="iref" href="#rfc.xref.Part3.13">B.3</a>, <a class="iref" href="#rfc.xref.Part3.14">C</a>, <a class="iref" href="#rfc.xref.Part3.15">C</a>, <a class="iref" href="#rfc.xref.Part3.16">C</a><ul class="ind">
    29592999                        <li class="indline1"><em>Section 3.2</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.6">3.3</a>, <a class="iref" href="#rfc.xref.Part3.7">3.3</a></li>
    29603000                        <li class="indline1"><em>Section 3.3</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.2">1.2.2</a></li>
    29613001                        <li class="indline1"><em>Section 3.4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.11">8.5</a></li>
    29623002                        <li class="indline1"><em>Section 4.1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.5">1.2.3</a>, <a class="iref" href="#rfc.xref.Part3.8">4.2</a>, <a class="iref" href="#rfc.xref.Part3.9">5</a>, <a class="iref" href="#rfc.xref.Part3.10">6</a></li>
    2963                         <li class="indline1"><em>Section 4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.14">D</a></li>
     3003                        <li class="indline1"><em>Section 4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.14">C</a></li>
    29643004                        <li class="indline1"><em>Section 4.2</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.4">1.2.3</a></li>
    2965                         <li class="indline1"><em>Section 5</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.15">D</a>, <a class="iref" href="#rfc.xref.Part3.16">D</a></li>
     3005                        <li class="indline1"><em>Section 5</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.15">C</a>, <a class="iref" href="#rfc.xref.Part3.16">C</a></li>
    29663006                        <li class="indline1"><em>Section 6.1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.3">1.2.3</a></li>
    29673007                        <li class="indline1"><em>Appendix A</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part3.1">1</a></li>
    29683008                     </ul>
    29693009                  </li>
    2970                   <li class="indline1"><em>Part5</em>&nbsp;&nbsp;<a class="iref" href="#Part5"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part5.1">C.3</a></li>
    2971                   <li class="indline1"><em>Part6</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.1">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.2">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.3">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.4">2.2</a>, <a class="iref" href="#rfc.xref.Part6.5">4.5</a>, <a class="iref" href="#rfc.xref.Part6.6">4.5</a>, <a class="iref" href="#rfc.xref.Part6.7">4.5</a>, <a class="iref" href="#Part6"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part6.8">C.3</a>, <a class="iref" href="#rfc.xref.Part6.9">D</a><ul class="ind">
    2972                         <li class="indline1"><em>Section 1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.4">2.2</a>, <a class="iref" href="#rfc.xref.Part6.9">D</a></li>
     3010                  <li class="indline1"><em>Part5</em>&nbsp;&nbsp;<a class="iref" href="#Part5"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part5.1">B.3</a></li>
     3011                  <li class="indline1"><em>Part6</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.1">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.2">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.3">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.4">2.2</a>, <a class="iref" href="#rfc.xref.Part6.5">4.5</a>, <a class="iref" href="#rfc.xref.Part6.6">4.5</a>, <a class="iref" href="#rfc.xref.Part6.7">4.5</a>, <a class="iref" href="#Part6"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.Part6.8">B.3</a>, <a class="iref" href="#rfc.xref.Part6.9">C</a><ul class="ind">
     3012                        <li class="indline1"><em>Section 1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.4">2.2</a>, <a class="iref" href="#rfc.xref.Part6.9">C</a></li>
    29733013                        <li class="indline1"><em>Section 16.2</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.5">4.5</a></li>
    29743014                        <li class="indline1"><em>Section 16.4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part6.1">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.2">1.2.3</a>, <a class="iref" href="#rfc.xref.Part6.6">4.5</a></li>
     
    29763016                     </ul>
    29773017                  </li>
    2978                   <li class="indline1">proxy&nbsp;&nbsp;<a class="iref" href="#rfc.iref.p.1">D</a></li>
     3018                  <li class="indline1">proxy&nbsp;&nbsp;<a class="iref" href="#rfc.iref.p.1">C</a></li>
    29793019               </ul>
    29803020            </li>
    29813021            <li class="indline0"><a id="rfc.index.R" href="#rfc.index.R"><b>R</b></a><ul class="ind">
    2982                   <li class="indline1">representation&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.4">D</a></li>
    2983                   <li class="indline1">request&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.1">D</a></li>
    2984                   <li class="indline1">resource&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.3">D</a></li>
    2985                   <li class="indline1">response&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.2">D</a></li>
     3022                  <li class="indline1">representation&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.4">C</a></li>
     3023                  <li class="indline1">request&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.1">C</a></li>
     3024                  <li class="indline1">resource&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.3">C</a></li>
     3025                  <li class="indline1">response&nbsp;&nbsp;<a class="iref" href="#rfc.iref.r.2">C</a></li>
    29863026                  <li class="indline1"><em>RFC1123</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC1123.1">3.2.1</a>, <a class="iref" href="#RFC1123"><b>12.2</b></a></li>
    29873027                  <li class="indline1"><em>RFC1305</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC1305.1">8.3</a>, <a class="iref" href="#RFC1305"><b>12.2</b></a></li>
    29883028                  <li class="indline1"><em>RFC1436</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC1436.1">1</a>, <a class="iref" href="#RFC1436"><b>12.2</b></a></li>
    29893029                  <li class="indline1"><em>RFC1900</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC1900.1">2.1.1</a>, <a class="iref" href="#rfc.xref.RFC1900.2">10.4</a>, <a class="iref" href="#RFC1900"><b>12.2</b></a></li>
    2990                   <li class="indline1"><em>RFC1945</em>&nbsp;&nbsp;<a class="iref" href="#RFC1945"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC1945.1">C</a></li>
     3030                  <li class="indline1"><em>RFC1945</em>&nbsp;&nbsp;<a class="iref" href="#RFC1945"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC1945.1">B</a></li>
    29913031                  <li class="indline1"><em>RFC2045</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2045.1">1</a>, <a class="iref" href="#rfc.xref.RFC2045.2">3.3</a>, <a class="iref" href="#rfc.xref.RFC2045.3">11</a>, <a class="iref" href="#RFC2045"><b>12.1</b></a></li>
    29923032                  <li class="indline1"><em>RFC2047</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2047.1">1.2.2</a>, <a class="iref" href="#RFC2047"><b>12.1</b></a></li>
    2993                   <li class="indline1"><em>RFC2068</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2068.1">3.1</a>, <a class="iref" href="#rfc.xref.RFC2068.2">7.1.1</a>, <a class="iref" href="#rfc.xref.RFC2068.3">7.1.3</a>, <a class="iref" href="#rfc.xref.RFC2068.4">7.2.3</a>, <a class="iref" href="#rfc.xref.RFC2068.5">11</a>, <a class="iref" href="#RFC2068"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2068.6">C</a>, <a class="iref" href="#rfc.xref.RFC2068.7">C.2</a><ul class="ind">
    2994                         <li class="indline1"><em>Section 19.7.1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2068.6">C</a></li>
     3033                  <li class="indline1"><em>RFC2068</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2068.1">3.1</a>, <a class="iref" href="#rfc.xref.RFC2068.2">7.1.1</a>, <a class="iref" href="#rfc.xref.RFC2068.3">7.1.3</a>, <a class="iref" href="#rfc.xref.RFC2068.4">7.2.3</a>, <a class="iref" href="#rfc.xref.RFC2068.5">11</a>, <a class="iref" href="#RFC2068"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2068.6">B</a>, <a class="iref" href="#rfc.xref.RFC2068.7">B.2</a><ul class="ind">
     3034                        <li class="indline1"><em>Section 19.7.1</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2068.6">B</a></li>
    29953035                     </ul>
    29963036                  </li>
    29973037                  <li class="indline1"><em>RFC2109</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2109.1">4.2</a>, <a class="iref" href="#RFC2109"><b>12.2</b></a></li>
    2998                   <li class="indline1"><em>RFC2119</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2119.1">1.1</a>, <a class="iref" href="#RFC2119"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.RFC2119.2">C.3</a></li>
    2999                   <li class="indline1"><em>RFC2145</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2145.1">3.1</a>, <a class="iref" href="#rfc.xref.RFC2145.2">3.1</a>, <a class="iref" href="#RFC2145"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2145.3">C.3</a></li>
    3000                   <li class="indline1"><em>RFC2616</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2616.1">1</a>, <a class="iref" href="#rfc.xref.RFC2616.2">11</a>, <a class="iref" href="#RFC2616"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2616.3">E.1</a></li>
     3038                  <li class="indline1"><em>RFC2119</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2119.1">1.1</a>, <a class="iref" href="#RFC2119"><b>12.1</b></a>, <a class="iref" href="#rfc.xref.RFC2119.2">B.3</a></li>
     3039                  <li class="indline1"><em>RFC2145</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2145.1">3.1</a>, <a class="iref" href="#rfc.xref.RFC2145.2">3.1</a>, <a class="iref" href="#RFC2145"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2145.3">B.3</a></li>
     3040                  <li class="indline1"><em>RFC2616</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2616.1">1</a>, <a class="iref" href="#rfc.xref.RFC2616.2">11</a>, <a class="iref" href="#RFC2616"><b>12.2</b></a>, <a class="iref" href="#rfc.xref.RFC2616.3">D.1</a></li>
    30013041                  <li class="indline1"><em>RFC2818</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2818.1">2.1.1</a>, <a class="iref" href="#RFC2818"><b>12.2</b></a></li>
    30023042                  <li class="indline1"><em>RFC2965</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC2965.1">4.2</a>, <a class="iref" href="#RFC2965"><b>12.2</b></a></li>
     
    30303070                     </ul>
    30313071                  </li>
    3032                   <li class="indline1"><em>RFC822</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC822.1">3.2.1</a>, <a class="iref" href="#RFC822"><b>12.2</b></a></li>
    30333072                  <li class="indline1"><em>RFC959</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.RFC959.1">1</a>, <a class="iref" href="#RFC959"><b>12.2</b></a></li>
    30343073               </ul>
    30353074            </li>
    30363075            <li class="indline0"><a id="rfc.index.S" href="#rfc.index.S"><b>S</b></a><ul class="ind">
    3037                   <li class="indline1">server&nbsp;&nbsp;<a class="iref" href="#rfc.iref.s.1">D</a></li>
     3076                  <li class="indline1">server&nbsp;&nbsp;<a class="iref" href="#rfc.iref.s.1">C</a></li>
    30383077                  <li class="indline1"><em>Spe</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Spe.1">7.1.1</a>, <a class="iref" href="#Spe"><b>12.2</b></a></li>
    30393078               </ul>
    30403079            </li>
    30413080            <li class="indline0"><a id="rfc.index.T" href="#rfc.index.T"><b>T</b></a><ul class="ind">
    3042                   <li class="indline1">TE header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.te.1">3.3</a>, <a class="iref" href="#rfc.xref.header.te.2">3.3.1</a>, <a class="iref" href="#rfc.iref.t.1"><b>8.5</b></a>, <a class="iref" href="#rfc.xref.header.te.3">9.1</a>, <a class="iref" href="#rfc.xref.header.te.4">C.3</a></li>
     3081                  <li class="indline1">TE header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.te.1">3.3</a>, <a class="iref" href="#rfc.xref.header.te.2">3.3.1</a>, <a class="iref" href="#rfc.iref.t.1"><b>8.5</b></a>, <a class="iref" href="#rfc.xref.header.te.3">9.1</a>, <a class="iref" href="#rfc.xref.header.te.4">B.3</a></li>
    30433082                  <li class="indline1"><em>Tou1998</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Tou1998.1">7.1.1</a>, <a class="iref" href="#Tou1998"><b>12.2</b></a></li>
    30443083                  <li class="indline1">Trailer header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.trailer.1">3.3.1</a>, <a class="iref" href="#rfc.xref.header.trailer.2">4.5</a>, <a class="iref" href="#rfc.iref.t.2"><b>8.6</b></a>, <a class="iref" href="#rfc.xref.header.trailer.3">9.1</a></li>
    30453084                  <li class="indline1">Transfer-Encoding header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.transfer-encoding.1">3.3</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.2">4.3</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.3">4.4</a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.4">4.5</a>, <a class="iref" href="#rfc.iref.t.3"><b>8.7</b></a>, <a class="iref" href="#rfc.xref.header.transfer-encoding.5">9.1</a></li>
    3046                   <li class="indline1">tunnel&nbsp;&nbsp;<a class="iref" href="#rfc.iref.t.4">D</a></li>
     3085                  <li class="indline1">tunnel&nbsp;&nbsp;<a class="iref" href="#rfc.iref.t.4">C</a></li>
    30473086               </ul>
    30483087            </li>
    30493088            <li class="indline0"><a id="rfc.index.U" href="#rfc.index.U"><b>U</b></a><ul class="ind">
    30503089                  <li class="indline1">Upgrade header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.upgrade.1">4.5</a>, <a class="iref" href="#rfc.iref.u.3"><b>8.8</b></a>, <a class="iref" href="#rfc.xref.header.upgrade.2">9.1</a></li>
    3051                   <li class="indline1">upstream&nbsp;&nbsp;<a class="iref" href="#rfc.iref.u.5">D</a></li>
     3090                  <li class="indline1">upstream&nbsp;&nbsp;<a class="iref" href="#rfc.iref.u.5">C</a></li>
    30523091                  <li class="indline1">URI scheme&nbsp;&nbsp;
    30533092                     <ul class="ind">
     
    30573096                  </li>
    30583097                  <li class="indline1"><em>USASCII</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.USASCII.1">1.2</a>, <a class="iref" href="#USASCII"><b>12.1</b></a></li>
    3059                   <li class="indline1">user agent&nbsp;&nbsp;<a class="iref" href="#rfc.iref.u.4">D</a></li>
     3098                  <li class="indline1">user agent&nbsp;&nbsp;<a class="iref" href="#rfc.iref.u.4">C</a></li>
    30603099               </ul>
    30613100            </li>
    30623101            <li class="indline0"><a id="rfc.index.V" href="#rfc.index.V"><b>V</b></a><ul class="ind">
    3063                   <li class="indline1">variant&nbsp;&nbsp;<a class="iref" href="#rfc.iref.v.2">D</a></li>
     3102                  <li class="indline1">variant&nbsp;&nbsp;<a class="iref" href="#rfc.iref.v.2">C</a></li>
    30643103                  <li class="indline1">Via header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.via.1">4.5</a>, <a class="iref" href="#rfc.iref.v.1"><b>8.9</b></a>, <a class="iref" href="#rfc.xref.header.via.2">9.1</a></li>
    30653104               </ul>
  • draft-ietf-httpbis/latest-roy/p1-messaging.xml

    r387 r388  
    221221  </t>
    222222  <t>
    223     The changes in this draft are summarized in <xref target="changes.since.04"/>.
     223    The changes in this draft are summarized in <xref target="changes.since.05"/>.
    224224  </t>
    225225</note>
     
    353353    elements. The full form is "&lt;n&gt;#&lt;m&gt;element" indicating at least
    354354    &lt;n&gt; and at most &lt;m&gt; elements, each separated by one or more commas
    355     (",") and &OPTIONAL; linear white space (LWS). This makes the usual
     355    (",") and &OPTIONAL; linear white space (OWS). This makes the usual
    356356    form of lists very easy; a rule such as
    357357    <figure><artwork type="example">
    358  ( *<x:ref>LWS</x:ref> element *( *<x:ref>LWS</x:ref> "," *<x:ref>LWS</x:ref> element ))</artwork></figure>
     358 ( *<x:ref>OWS</x:ref> element *( *<x:ref>OWS</x:ref> "," *<x:ref>OWS</x:ref> element ))</artwork></figure>
    359359  </t>
    360360  <t>
     
    392392<section title="Basic Rules" anchor="basic.rules">
    393393<t anchor="rule.CRLF">
    394    HTTP/1.1 defines the sequence CRLF as the end-of-line marker for all
     394  <x:anchor-alias value="CRLF"/>
     395   HTTP/1.1 defines the sequence CR LF as the end-of-line marker for all
    395396   protocol elements except the entity-body (see <xref target="tolerant.applications"/> for
    396397   tolerant applications). The end-of-line marker within an entity-body
     
    398399</t>
    399400<t anchor="rule.LWS">
    400   <x:anchor-alias value="LWS"/>
    401    HTTP/1.1 header field values can be folded onto multiple lines if the
    402    continuation line begins with a space or horizontal tab. All linear
    403    white space, including folding, has the same semantics as SP. A
    404    recipient &MAY; replace any linear white space with a single SP before
     401   All linear white space (LWS) in header field-values has the same semantics as SP. A
     402   recipient &MAY; replace any such linear white space with a single SP before
    405403   interpreting the field value or forwarding the message downstream.
    406404</t>
    407 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="LWS"/>
    408   <x:ref>LWS</x:ref>            = [<x:ref>CRLF</x:ref>] 1*( <x:ref>SP</x:ref> / <x:ref>HTAB</x:ref> )
     405<t>
     406   Historically, HTTP/1.1 header field values allow linear white space folding across
     407   multiple lines. However, this specification deprecates its use; senders &MUST-NOT;
     408   produce messages that include LWS folding (i.e., use the obs-fold rule), except
     409   within the message/http media type (<xref target="internet.media.type.message.http"/>).
     410   Receivers &SHOULD; still parse folded linear white space.
     411</t>
     412<t>
     413   This specification uses three rules to denote the use of linear white space;
     414   BWS ("Bad" White Space), OWS (Optional White Space), and RWS (Required White Space).
     415</t>
     416<t>
     417   "Bad" white space is allowed by the BNF, but senders &SHOULD-NOT; produce it in messages.
     418   Receivers &MUST; accept it in incoming messages.
     419</t>
     420<t>
     421   Required white space is used when at least one linear white space character
     422   is required to separate field tokens. In all such cases, a single SP character
     423   &SHOULD; be used.
     424</t>
     425<t anchor="rule.whitespace">
     426  <x:anchor-alias value="BWS"/>
     427  <x:anchor-alias value="OWS"/>
     428  <x:anchor-alias value="RWS"/>
     429  <x:anchor-alias value="obs-fold"/>
     430</t>
     431<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="OWS"/><iref primary="true" item="Grammar" subitem="RWS"/><iref primary="true" item="Grammar" subitem="BWS"/>
     432  <x:ref>OWS</x:ref>            = *( [ obs-fold ] <x:ref>WSP</x:ref> )
     433                 ; "optional" white space
     434  <x:ref>RWS</x:ref>            = 1*( [ obs-fold ] <x:ref>WSP</x:ref> )
     435                 ; "required" white space
     436  <x:ref>BWS</x:ref>            = <x:ref>OWS</x:ref>
     437                 ; "bad" white space
     438  <x:ref>obs-fold</x:ref>       = <x:ref>CRLF</x:ref>
    409439</artwork></figure>
    410440<t anchor="rule.TEXT">
     
    417447</t>
    418448<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="TEXT"/>
    419   <x:ref>TEXT</x:ref>           = %x20-7E / %x80-FF / <x:ref>LWS</x:ref>
    420                  ; any <x:ref>OCTET</x:ref> except <x:ref>CTL</x:ref>s, but including <x:ref>LWS</x:ref>
     449  <x:ref>TEXT</x:ref>           = %x20-7E / %x80-FF / <x:ref>OWS</x:ref>
     450                 ; any <x:ref>OCTET</x:ref> except <x:ref>CTL</x:ref>s, but including <x:ref>OWS</x:ref>
    421451</artwork></figure>
    422452<t>
     
    428458  <x:anchor-alias value="tchar"/>
    429459  <x:anchor-alias value="token"/>
    430   <x:anchor-alias value="separators"/>
    431460   Many HTTP/1.1 header field values consist of words separated by LWS
    432461   or special characters. These special characters &MUST; be in a quoted
     
    434463   <xref target="transfer.codings"/>).
    435464</t>
    436 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="token"/><iref primary="true" item="Grammar" subitem="tchar"/><iref primary="true" item="Grammar" subitem="separators"/>
    437   <x:ref>separators</x:ref>     = "(" / ")" / "&lt;" / "&gt;" / "@"
    438                  / "," / ";" / ":" / "\" / <x:ref>DQUOTE</x:ref>
    439                  / "/" / "[" / "]" / "?" / "="
    440                  / "{" / "}" / <x:ref>SP</x:ref> / <x:ref>HTAB</x:ref>
    441                  
     465<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="token"/><iref primary="true" item="Grammar" subitem="tchar"/>
    442466  <x:ref>tchar</x:ref>          = "!" / "#" / "$" / "%" / "&amp;" / "'" / "*"
    443467                 / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
    444468                 / <x:ref>DIGIT</x:ref> / <x:ref>ALPHA</x:ref>
    445                  ; any <x:ref>CHAR</x:ref> except <x:ref>CTL</x:ref>s or <x:ref>separators</x:ref>
    446469                 
    447470  <x:ref>token</x:ref>          = 1*<x:ref>tchar</x:ref>
     
    467490</t>
    468491<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="quoted-string"/><iref primary="true" item="Grammar" subitem="qdtext"/>
    469   <x:ref>quoted-string</x:ref>  = ( <x:ref>DQUOTE</x:ref> *(<x:ref>qdtext</x:ref> / <x:ref>quoted-pair</x:ref> ) <x:ref>DQUOTE</x:ref> )
     492  <x:ref>quoted-string</x:ref>  = <x:ref>DQUOTE</x:ref> *(<x:ref>qdtext</x:ref> / <x:ref>quoted-pair</x:ref> ) <x:ref>DQUOTE</x:ref>
    470493  <x:ref>qdtext</x:ref>         = &lt;any <x:ref>TEXT</x:ref> excluding <x:ref>DQUOTE</x:ref> and "\">
    471494</artwork></figure>
     
    867890</t>
    868891<figure><artwork type="example">
    869    Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 822, updated by RFC 1123
     892   Sun, 06 Nov 1994 08:49:37 GMT  ; RFC 1123
    870893   Sunday, 06-Nov-94 08:49:37 GMT ; obsolete RFC 850 format
    871894   Sun Nov  6 08:49:37 1994       ; ANSI C's asctime() format
     
    873896<t>
    874897   The first format is preferred as an Internet standard and represents
    875    a fixed-length subset of that defined by <xref target="RFC1123"/> (an update to
    876    <xref target="RFC822"/>). The other formats are described here only for
     898   a fixed-length subset of that defined by <xref target="RFC1123"/>. The
     899   other formats are described here only for
    877900   compatibility with obsolete implementations.
    878901   HTTP/1.1 clients and servers that parse the date value &MUST; accept
     
    972995<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="transfer-coding"/><iref primary="true" item="Grammar" subitem="transfer-extension"/>
    973996  <x:ref>transfer-coding</x:ref>         = "chunked" / <x:ref>transfer-extension</x:ref>
    974   <x:ref>transfer-extension</x:ref>      = <x:ref>token</x:ref> *( ";" <x:ref>parameter</x:ref> )
     997  <x:ref>transfer-extension</x:ref>      = <x:ref>token</x:ref> *( <x:ref>OWS</x:ref> ";" <x:ref>OWS</x:ref> <x:ref>parameter</x:ref> )
    975998</artwork></figure>
    976999<t anchor="rule.parameter">
     
    9811004</t>
    9821005<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="parameter"/><iref primary="true" item="Grammar" subitem="attribute"/><iref primary="true" item="Grammar" subitem="value"/>
    983   <x:ref>parameter</x:ref>               = <x:ref>attribute</x:ref> "=" <x:ref>value</x:ref>
     1006  <x:ref>parameter</x:ref>               = <x:ref>attribute</x:ref> <x:ref>BWS</x:ref> "=" <x:ref>BWS</x:ref> <x:ref>value</x:ref>
    9841007  <x:ref>attribute</x:ref>               = <x:ref>token</x:ref>
    9851008  <x:ref>value</x:ref>                   = <x:ref>token</x:ref> / <x:ref>quoted-string</x:ref>
     
    10291052  <x:anchor-alias value="Chunked-Body"/>
    10301053  <x:anchor-alias value="chunk-data"/>
    1031   <x:anchor-alias value="chunk-extension"/>
     1054  <x:anchor-alias value="chunk-ext"/>
    10321055  <x:anchor-alias value="chunk-ext-name"/>
    10331056  <x:anchor-alias value="chunk-ext-val"/>
     
    10431066   received the full message.
    10441067</t>
    1045 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Chunked-Body"/><iref primary="true" item="Grammar" subitem="chunk"/><iref primary="true" item="Grammar" subitem="chunk-size"/><iref primary="true" item="Grammar" subitem="last-chunk"/><iref primary="true" item="Grammar" subitem="chunk-extension"/><iref primary="true" item="Grammar" subitem="chunk-ext-name"/><iref primary="true" item="Grammar" subitem="chunk-ext-val"/><iref primary="true" item="Grammar" subitem="chunk-data"/><iref primary="true" item="Grammar" subitem="trailer-part"/>
     1068<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Chunked-Body"/><iref primary="true" item="Grammar" subitem="chunk"/><iref primary="true" item="Grammar" subitem="chunk-size"/><iref primary="true" item="Grammar" subitem="last-chunk"/><iref primary="true" item="Grammar" subitem="chunk-ext"/><iref primary="true" item="Grammar" subitem="chunk-ext-name"/><iref primary="true" item="Grammar" subitem="chunk-ext-val"/><iref primary="true" item="Grammar" subitem="chunk-data"/><iref primary="true" item="Grammar" subitem="trailer-part"/>
    10461069  <x:ref>Chunked-Body</x:ref>   = *<x:ref>chunk</x:ref>
    10471070                   <x:ref>last-chunk</x:ref>
     
    10491072                   <x:ref>CRLF</x:ref>
    10501073 
    1051   <x:ref>chunk</x:ref>          = <x:ref>chunk-size</x:ref> [ <x:ref>chunk-extension</x:ref> ] <x:ref>CRLF</x:ref>
     1074  <x:ref>chunk</x:ref>          = <x:ref>chunk-size</x:ref> *WSP [ <x:ref>chunk-ext</x:ref> ] <x:ref>CRLF</x:ref>
    10521075                   <x:ref>chunk-data</x:ref> <x:ref>CRLF</x:ref>
    10531076  <x:ref>chunk-size</x:ref>     = 1*<x:ref>HEXDIG</x:ref>
    1054   <x:ref>last-chunk</x:ref>     = 1*("0") [ <x:ref>chunk-extension</x:ref> ] <x:ref>CRLF</x:ref>
     1077  <x:ref>last-chunk</x:ref>     = 1*("0") *WSP [ <x:ref>chunk-ext</x:ref> ] <x:ref>CRLF</x:ref>
    10551078 
    1056   <x:ref>chunk-extension</x:ref>= *( ";" <x:ref>chunk-ext-name</x:ref> [ "=" <x:ref>chunk-ext-val</x:ref> ] )
     1079  <x:ref>chunk-ext</x:ref>      = *( ";" *WSP <x:ref>chunk-ext-name</x:ref>
     1080                      [ "=" <x:ref>chunk-ext-val</x:ref> ] *WSP )
    10571081  <x:ref>chunk-ext-name</x:ref> = <x:ref>token</x:ref>
    10581082  <x:ref>chunk-ext-val</x:ref>  = <x:ref>token</x:ref> / <x:ref>quoted-string</x:ref>
     
    11001124</t>
    11011125<figure><artwork type="code">
    1102     length := 0
    1103     read chunk-size, chunk-extension (if any) and CRLF
    1104     while (chunk-size &gt; 0) {
    1105        read chunk-data and CRLF
    1106        append chunk-data to entity-body
    1107        length := length + chunk-size
    1108        read chunk-size and CRLF
    1109     }
    1110     read entity-header
    1111     while (entity-header not empty) {
    1112        append entity-header to existing header fields
    1113        read entity-header
    1114     }
    1115     Content-Length := length
    1116     Remove "chunked" from Transfer-Encoding
     1126  length := 0
     1127  read chunk-size, chunk-ext (if any) and CRLF
     1128  while (chunk-size &gt; 0) {
     1129     read chunk-data and CRLF
     1130     append chunk-data to entity-body
     1131     length := length + chunk-size
     1132     read chunk-size and CRLF
     1133  }
     1134  read entity-header
     1135  while (entity-header not empty) {
     1136     append entity-header to existing header fields
     1137     read entity-header
     1138  }
     1139  Content-Length := length
     1140  Remove "chunked" from Transfer-Encoding
    11171141</artwork></figure>
    11181142<t>
    11191143   All HTTP/1.1 applications &MUST; be able to receive and decode the
    1120    "chunked" transfer-coding, and &MUST; ignore chunk-extension extensions
     1144   "chunked" transfer-coding, and &MUST; ignore chunk-ext extensions
    11211145   they do not understand.
    11221146</t>
     
    12221246  <x:ref>message-header</x:ref> = <x:ref>field-name</x:ref> ":" [ <x:ref>field-value</x:ref> ]
    12231247  <x:ref>field-name</x:ref>     = <x:ref>token</x:ref>
    1224   <x:ref>field-value</x:ref>    = *( <x:ref>field-content</x:ref> / <x:ref>LWS</x:ref> )
     1248  <x:ref>field-value</x:ref>    = *( <x:ref>field-content</x:ref> / <x:ref>OWS</x:ref> )
    12251249  <x:ref>field-content</x:ref>  = &lt;field content&gt;
    1226                    ; the <x:ref>OCTET</x:ref>s making up the field-value
    1227                    ; and consisting of either *<x:ref>TEXT</x:ref> or combinations
    1228                    ; of <x:ref>token</x:ref>, <x:ref>separators</x:ref>, and <x:ref>quoted-string</x:ref>
    1229 </artwork></figure>
     1250</artwork></figure>
     1251<t>
     1252  <cref>whitespace between field-name and colon is an error and MUST NOT be accepted</cref>
     1253</t>
    12301254<t>
    12311255   The field-content does not include any leading or trailing LWS:
     
    21012125  <x:anchor-alias value="Connection"/>
    21022126  <x:anchor-alias value="connection-token"/>
    2103 <t>
    2104    The Connection general-header field allows the sender to specify
     2127  <x:anchor-alias value="Connection-v"/>
     2128<t>
     2129   The general-header field "Connection" allows the sender to specify
    21052130   options that are desired for that particular connection and &MUST-NOT;
    21062131   be communicated by proxies over further connections.
    21072132</t>
    21082133<t>
    2109    The Connection header has the following grammar:
    2110 </t>
    2111 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Connection"/><iref primary="true" item="Grammar" subitem="connection-token"/>
    2112   <x:ref>Connection</x:ref> = "Connection" ":" 1#(<x:ref>connection-token</x:ref>)
    2113   <x:ref>connection-token</x:ref>  = <x:ref>token</x:ref>
     2134   The Connection header's value has the following grammar:
     2135</t>
     2136<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Connection"/><iref primary="true" item="Grammar" subitem="Connection-v"/><iref primary="true" item="Grammar" subitem="connection-token"/>
     2137  <x:ref>Connection</x:ref>       = "Connection" ":" <x:ref>OWS</x:ref> <x:ref>Connection-v</x:ref>
     2138  <x:ref>Connection-v</x:ref>     = 1#<x:ref>connection-token</x:ref>
     2139  <x:ref>connection-token</x:ref> = <x:ref>token</x:ref>
    21142140</artwork></figure>
    21152141<t>
     
    21332159</t>
    21342160<figure><artwork type="example">
    2135     Connection: close
     2161  Connection: close
    21362162</artwork></figure>
    21372163<t>
     
    21622188  <iref primary="true" item="Headers" subitem="Content-Length" x:for-anchor=""/>
    21632189  <x:anchor-alias value="Content-Length"/>
    2164 <t>
    2165    The Content-Length entity-header field indicates the size of the
     2190  <x:anchor-alias value="Content-Length-v"/>
     2191<t>
     2192   The entity-header field "Content-Length" indicates the size of the
    21662193   entity-body, in decimal number of OCTETs, sent to the recipient or,
    21672194   in the case of the HEAD method, the size of the entity-body that
    21682195   would have been sent had the request been a GET.
    21692196</t>
    2170 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Content-Length"/>
    2171   <x:ref>Content-Length</x:ref>    = "Content-Length" ":" 1*<x:ref>DIGIT</x:ref>
     2197<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Content-Length"/><iref primary="true" item="Grammar" subitem="Content-Length-v"/>
     2198  <x:ref>Content-Length</x:ref>   = "Content-Length" ":" <x:ref>OWS</x:ref> 1*<x:ref>Content-Length-v</x:ref>
     2199  <x:ref>Content-Length-v</x:ref> = 1*<x:ref>DIGIT</x:ref>
    21722200</artwork></figure>
    21732201<t>
     
    21752203</t>
    21762204<figure><artwork type="example">
    2177     Content-Length: 3495
     2205  Content-Length: 3495
    21782206</artwork></figure>
    21792207<t>
     
    22002228  <iref primary="true" item="Headers" subitem="Date" x:for-anchor=""/>
    22012229  <x:anchor-alias value="Date"/>
    2202 <t>
    2203    The Date general-header field represents the date and time at which
     2230  <x:anchor-alias value="Date-v"/>
     2231<t>
     2232   The general-header field "Date" represents the date and time at which
    22042233   the message was originated, having the same semantics as orig-date in
    22052234   <xref target="RFC5322" x:fmt="of" x:sec="3.6.1"/>. The field value is an
     
    22072236   it &MUST; be sent in rfc1123-date format.
    22082237</t>
    2209 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Date"/>
    2210   <x:ref>Date</x:ref>  = "Date" ":" <x:ref>HTTP-date</x:ref>
     2238<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Date"/><iref primary="true" item="Grammar" subitem="Date-v"/>
     2239  <x:ref>Date</x:ref>   = "Date" ":" <x:ref>OWS</x:ref> <x:ref>Date-v</x:ref>
     2240  <x:ref>Date-v</x:ref> = <x:ref>HTTP-date</x:ref>
    22112241</artwork></figure>
    22122242<t>
     
    22142244</t>
    22152245<figure><artwork type="example">
    2216     Date: Tue, 15 Nov 1994 08:12:31 GMT
     2246  Date: Tue, 15 Nov 1994 08:12:31 GMT
    22172247</artwork></figure>
    22182248<t>
     
    22782308  <iref primary="true" item="Headers" subitem="Host" x:for-anchor=""/>
    22792309  <x:anchor-alias value="Host"/>
    2280 <t>
    2281    The Host request-header field specifies the Internet host and port
     2310  <x:anchor-alias value="Host-v"/>
     2311<t>
     2312   The request-header field "Host" specifies the Internet host and port
    22822313   number of the resource being requested, as obtained from the original
    22832314   URI given by the user or referring resource (generally an http URI,
     
    22882319   URL of a server for multiple host names on a single IP address.
    22892320</t>
    2290 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Host"/>
    2291   <x:ref>Host</x:ref> = "Host" ":" <x:ref>uri-host</x:ref> [ ":" <x:ref>port</x:ref> ] ; <xref target="http.uri"/>
     2321<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Host"/><iref primary="true" item="Grammar" subitem="Host-v"/>
     2322  <x:ref>Host</x:ref>   = "Host" ":" <x:ref>OWS</x:ref> <x:ref>Host-v</x:ref>
     2323  <x:ref>Host-v</x:ref> = <x:ref>uri-host</x:ref> [ ":" <x:ref>port</x:ref> ] ; <xref target="http.uri"/>
    22922324</artwork></figure>
    22932325<t>
     
    22982330</t>
    22992331<figure><artwork type="example">
    2300     GET /pub/WWW/ HTTP/1.1
    2301     Host: www.example.org
     2332  GET /pub/WWW/ HTTP/1.1
     2333  Host: www.example.org
    23022334</artwork></figure>
    23032335<t>
     
    23232355  <iref primary="true" item="Headers" subitem="TE" x:for-anchor=""/>
    23242356  <x:anchor-alias value="TE"/>
     2357  <x:anchor-alias value="TE-v"/>
    23252358  <x:anchor-alias value="t-codings"/>
    23262359<t>
    2327    The TE request-header field indicates what extension transfer-codings
     2360   The request-header field "TE" indicates what extension transfer-codings
    23282361   it is willing to accept in the response and whether or not it is
    23292362   willing to accept trailer fields in a chunked transfer-coding. Its
     
    23322365   parameters (as described in <xref target="transfer.codings"/>).
    23332366</t>
    2334 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="TE"/><iref primary="true" item="Grammar" subitem="t-codings"/>
    2335   <x:ref>TE</x:ref>        = "TE" ":" #( <x:ref>t-codings</x:ref> )
     2367<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="TE"/><iref primary="true" item="Grammar" subitem="TE-v"/><iref primary="true" item="Grammar" subitem="t-codings"/>
     2368  <x:ref>TE</x:ref>        = "TE" ":" <x:ref>OWS</x:ref> <x:ref>TE-v</x:ref>
     2369  <x:ref>TE-v</x:ref>      = #<x:ref>t-codings</x:ref>
    23362370  <x:ref>t-codings</x:ref> = "trailers" / ( <x:ref>transfer-extension</x:ref> [ <x:ref>accept-params</x:ref> ] )
    23372371</artwork></figure>
     
    23472381</t>
    23482382<figure><artwork type="example">
    2349     TE: deflate
    2350     TE:
    2351     TE: trailers, deflate;q=0.5
     2383  TE: deflate
     2384  TE:
     2385  TE: trailers, deflate;q=0.5
    23522386</artwork></figure>
    23532387<t>
     
    23992433  <iref primary="true" item="Headers" subitem="Trailer" x:for-anchor=""/>
    24002434  <x:anchor-alias value="Trailer"/>
    2401 <t>
    2402    The Trailer general field value indicates that the given set of
     2435  <x:anchor-alias value="Trailer-v"/>
     2436<t>
     2437   The general field "Trailer" indicates that the given set of
    24032438   header fields is present in the trailer of a message encoded with
    24042439   chunked transfer-coding.
    24052440</t>
    2406 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Trailer"/>
    2407   <x:ref>Trailer</x:ref>  = "Trailer" ":" 1#<x:ref>field-name</x:ref>
     2441<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Trailer"/><iref primary="true" item="Grammar" subitem="Trailer-v"/>
     2442  <x:ref>Trailer</x:ref>   = "Trailer" ":" <x:ref>OWS</x:ref> <x:ref>Trailer-v</x:ref>
     2443  <x:ref>Trailer-v</x:ref> = 1#<x:ref>field-name</x:ref>
    24082444</artwork></figure>
    24092445<t>
     
    24332469  <iref primary="true" item="Headers" subitem="Transfer-Encoding" x:for-anchor=""/>
    24342470  <x:anchor-alias value="Transfer-Encoding"/>
    2435 <t>
    2436    The Transfer-Encoding general-header field indicates what (if any)
     2471  <x:anchor-alias value="Transfer-Encoding-v"/>
     2472<t>
     2473   The general-header "Transfer-Encoding" field indicates what (if any)
    24372474   type of transformation has been applied to the message body in order
    24382475   to safely transfer it between the sender and the recipient. This
     
    24402477   property of the message, not of the entity.
    24412478</t>
    2442 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Transfer-Encoding"/>
    2443   <x:ref>Transfer-Encoding</x:ref>       = "Transfer-Encoding" ":" 1#<x:ref>transfer-coding</x:ref>
     2479<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Transfer-Encoding"/><iref primary="true" item="Grammar" subitem="Transfer-Encoding-v"/>
     2480  <x:ref>Transfer-Encoding</x:ref>   = "Transfer-Encoding" ":" <x:ref>OWS</x:ref>
     2481                        <x:ref>Transfer-Encoding-v</x:ref>
     2482  <x:ref>Transfer-Encoding-v</x:ref> = 1#<x:ref>transfer-coding</x:ref>
    24442483</artwork></figure>
    24452484<t>
     
    24652504  <iref primary="true" item="Headers" subitem="Upgrade" x:for-anchor=""/>
    24662505  <x:anchor-alias value="Upgrade"/>
    2467 <t>
    2468    The Upgrade general-header allows the client to specify what
     2506  <x:anchor-alias value="Upgrade-v"/>
     2507<t>
     2508   The general-header "Upgrade" allows the client to specify what
    24692509   additional communication protocols it supports and would like to use
    24702510   if the server finds it appropriate to switch protocols. The server
     
    24722512   response to indicate which protocol(s) are being switched.
    24732513</t>
    2474 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Upgrade"/>
    2475   <x:ref>Upgrade</x:ref>        = "Upgrade" ":" 1#<x:ref>product</x:ref>
     2514<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Upgrade"/><iref primary="true" item="Grammar" subitem="Upgrade-v"/>
     2515  <x:ref>Upgrade</x:ref>   = "Upgrade" ":" <x:ref>OWS</x:ref> <x:ref>Upgrade-v</x:ref>
     2516  <x:ref>Upgrade-v</x:ref> = 1#<x:ref>product</x:ref>
    24762517</artwork></figure>
    24772518<t>
     
    24792520</t>
    24802521<figure><artwork type="example">
    2481     Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11
     2522  Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11
    24822523</artwork></figure>
    24832524<t>
     
    25342575  <x:anchor-alias value="received-protocol"/>
    25352576  <x:anchor-alias value="Via"/>
    2536 <t>
    2537    The Via general-header field &MUST; be used by gateways and proxies to
     2577  <x:anchor-alias value="Via-v"/>
     2578<t>
     2579   The general-header field "Via" &MUST; be used by gateways and proxies to
    25382580   indicate the intermediate protocols and recipients between the user
    25392581   agent and the server on requests, and between the origin server and
     
    25432585   all senders along the request/response chain.
    25442586</t>
    2545 <figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Via"/><iref primary="true" item="Grammar" subitem="received-protocol"/><iref primary="true" item="Grammar" subitem="protocol-name"/><iref primary="true" item="Grammar" subitem="protocol-version"/><iref primary="true" item="Grammar" subitem="received-by"/><iref primary="true" item="Grammar" subitem="pseudonym"/>
    2546   <x:ref>Via</x:ref> =  "Via" ":" 1#( <x:ref>received-protocol</x:ref> <x:ref>received-by</x:ref> [ <x:ref>comment</x:ref> ] )
     2587<figure><artwork type="abnf2616"><iref primary="true" item="Grammar" subitem="Via"/><iref primary="true" item="Grammar" subitem="Via-v"/><iref primary="true" item="Grammar" subitem="received-protocol"/><iref primary="true" item="Grammar" subitem="protocol-name"/><iref primary="true" item="Grammar" subitem="protocol-version"/><iref primary="true" item="Grammar" subitem="received-by"/><iref primary="true" item="Grammar" subitem="pseudonym"/>
     2588  <x:ref>Via</x:ref>               = "Via" ":" <x:ref>OWS</x:ref> <x:ref>Via-v</x:ref>
     2589  <x:ref>Via-v</x:ref>             = 1#( <x:ref>received-protocol</x:ref> <x:ref>RWS</x:ref> <x:ref>received-by</x:ref>
     2590                          [ <x:ref>RWS</x:ref> <x:ref>comment</x:ref> ] )
    25472591  <x:ref>received-protocol</x:ref> = [ <x:ref>protocol-name</x:ref> "/" ] <x:ref>protocol-version</x:ref>
    25482592  <x:ref>protocol-name</x:ref>     = <x:ref>token</x:ref>
     
    25892633</t>
    25902634<figure><artwork type="example">
    2591     Via: 1.0 fred, 1.1 p.example.net (Apache/1.1)
     2635  Via: 1.0 fred, 1.1 p.example.net (Apache/1.1)
    25922636</artwork></figure>
    25932637<t>
     
    26062650</t>
    26072651<figure><artwork type="example">
    2608     Via: 1.0 ricky, 1.1 ethel, 1.1 fred, 1.0 lucy
     2652  Via: 1.0 ricky, 1.1 ethel, 1.1 fred, 1.0 lucy
    26092653</artwork></figure>
    26102654<t>
     
    26122656</t>
    26132657<figure><artwork type="example">
    2614     Via: 1.0 ricky, 1.1 mertz, 1.0 lucy
     2658  Via: 1.0 ricky, 1.1 mertz, 1.0 lucy
    26152659</artwork></figure>
    26162660<t>
     
    34123456</reference>
    34133457
    3414 <reference anchor="RFC822">
    3415   <front>
    3416     <title abbrev="Standard for ARPA Internet Text Messages">Standard for the format of ARPA Internet text messages</title>
    3417     <author initials="D.H." surname="Crocker" fullname="David H. Crocker">
    3418       <organization>University of Delaware, Dept. of Electrical Engineering</organization>
    3419       <address><email>DCrocker@UDel-Relay</email></address>
    3420     </author>
    3421     <date month="August" day="13" year="1982"/>
    3422   </front>
    3423   <seriesInfo name="STD" value="11"/>
    3424   <seriesInfo name="RFC" value="822"/>
    3425 </reference>
    3426 
    34273458<reference anchor="RFC959">
    34283459  <front>
     
    38853916</section>
    38863917
    3887 <section title="Conversion of Date Formats" anchor="conversion.of.date.formats">
    3888 <t>
    3889    HTTP/1.1 uses a restricted set of date formats (<xref target="full.date"/>) to
    3890    simplify the process of date comparison. Proxies and gateways from
    3891    other protocols &SHOULD; ensure that any Date header field present in a
    3892    message conforms to one of the HTTP/1.1 formats and rewrite the date
    3893    if necessary.
    3894 </t>
    3895 </section>
    3896 
    38973918<section title="Compatibility with Previous Versions" anchor="compatibility">
    38983919<t>
     
    40654086<section title="Changes from RFC 2616" anchor="changes.from.rfc.2616">
    40664087<t>
     4088  Rules about implicit linear white space between certain grammar productions
     4089  have been removed; now it's only allowed when specifically pointed out
     4090  in the ABNF.
    40674091  The CHAR rule does not allow the NUL character anymore (this affects
    40684092  the comment and quoted-string rules).  Furthermore, the quoted-pair
     
    44894513    <t>
    44904514      Avoid underscore character in rule names ("http_URL" ->
    4491       "http-URI", "abs_path" -> "path-absolute").
    4492     </t>
    4493     <t>
    4494       Add rules for terms imported from URI spec ("absolute-URI", "authority",
    4495       "path-abempty", "path-absolute", "uri-host", "port", "query").
     4515      "http-URL", "abs_path" -> "path-absolute").
     4516    </t>
     4517    <t>
     4518      Add rules for terms imported from URI spec ("absoluteURI", "authority",
     4519      "path-absolute", "port", "query", "relativeURI", "host) -- these will
     4520      have to be updated when switching over to RFC3986.
    44964521    </t>
    44974522    <t>
     
    46004625  <list style="symbols">
    46014626    <t>
     4627      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/34"/>:
     4628      "Out-of-date reference for URIs"
     4629    </t>
     4630    <t>
    46024631      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/132"/>:
    46034632      "RFC 2822 is updated by RFC 5322"
     
    46144643      Get rid of RFC822 dependency; use RFC5234 plus extensions instead.
    46154644    </t>
     4645    <t>
     4646      Only reference RFC 5234's core rules.
     4647    </t>
     4648    <t>
     4649      Introduce new ABNF rules for "bad" whitespace ("BWS"), optional
     4650      whitespace ("OWS") and required whitespace ("RWS").
     4651    </t>
     4652    <t>
     4653      Rewrite ABNFs to spell out whitespace rules, factor out
     4654      header value format definitions.
     4655    </t>
     4656  </list>
     4657</t>
     4658</section>
     4659
     4660<section title="Since draft-ietf-httpbis-p1-messaging-05" anchor="changes.since.05">
     4661<t>
     4662  Closed issues:
     4663  <list style="symbols">
     4664    <t>
     4665      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/118"/>:
     4666      "Join "Differences Between HTTP Entities and RFC 2045 Entities"?"
     4667    </t>
     4668    <t>
     4669      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/134"/>:
     4670      "RFC822 reference left in discussion of date formats"
     4671    </t>
    46164672  </list>
    46174673</t>
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