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Timestamp:
Sep 15, 2012, 1:06:47 AM (7 years ago)
Author:
julian.reschke@…
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  • draft-ietf-httpbis/latest/p2-semantics.html

    r1892 r1894  
    449449  }
    450450  @bottom-center {
    451        content: "Expires March 18, 2013";
     451       content: "Expires March 19, 2013";
    452452  }
    453453  @bottom-right {
     
    498498      <meta name="dct.creator" content="Reschke, J. F.">
    499499      <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p2-semantics-latest">
    500       <meta name="dct.issued" scheme="ISO8601" content="2012-09-14">
     500      <meta name="dct.issued" scheme="ISO8601" content="2012-09-15">
    501501      <meta name="dct.replaces" content="urn:ietf:rfc:2616">
    502502      <meta name="dct.abstract" content="The Hypertext Transfer Protocol (HTTP) is an application-level protocol for distributed, collaborative, hypertext information systems. This document defines the semantics of HTTP/1.1 messages, as expressed by request methods, request header fields, response status codes, and response header fields, along with the payload of messages (metadata and body content) and mechanisms for content negotiation.">
     
    529529            </tr>
    530530            <tr>
    531                <td class="left">Expires: March 18, 2013</td>
     531               <td class="left">Expires: March 19, 2013</td>
    532532               <td class="right">greenbytes</td>
    533533            </tr>
    534534            <tr>
    535535               <td class="left"></td>
    536                <td class="right">September 14, 2012</td>
     536               <td class="right">September 15, 2012</td>
    537537            </tr>
    538538         </tbody>
     
    561561         in progress”.
    562562      </p>
    563       <p>This Internet-Draft will expire on March 18, 2013.</p>
     563      <p>This Internet-Draft will expire on March 19, 2013.</p>
    564564      <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1>
    565565      <p>Copyright © 2012 IETF Trust and the persons identified as the document authors. All rights reserved.</p>
     
    961961      </div>
    962962      <div id="rfc.iref.c.2"></div>
    963       <div id="rfc.iref.h.1"></div>
    964963      <h3 id="rfc.section.3.2.1"><a href="#rfc.section.3.2.1">3.2.1</a>&nbsp;<a id="header.content-type" href="#header.content-type">Content-Type</a></h3>
    965964      <p id="rfc.section.3.2.1.p.1">The "Content-Type" header field indicates the media type of the representation. In the case of responses to the HEAD method,
     
    973972      </p>
    974973      <div id="rfc.iref.c.3"></div>
    975       <div id="rfc.iref.h.2"></div>
    976974      <h3 id="rfc.section.3.2.2"><a href="#rfc.section.3.2.2">3.2.2</a>&nbsp;<a id="header.content-encoding" href="#header.content-encoding">Content-Encoding</a></h3>
    977975      <p id="rfc.section.3.2.2.p.1">The "Content-Encoding" header field indicates what content-codings have been applied to the representation beyond those inherent
     
    1001999      </p>
    10021000      <div id="rfc.iref.c.4"></div>
    1003       <div id="rfc.iref.h.3"></div>
    10041001      <h3 id="rfc.section.3.2.3"><a href="#rfc.section.3.2.3">3.2.3</a>&nbsp;<a id="header.content-language" href="#header.content-language">Content-Language</a></h3>
    10051002      <p id="rfc.section.3.2.3.p.1">The "Content-Language" header field describes the natural language(s) of the intended audience for the representation. Note
     
    10271024      </p>
    10281025      <div id="rfc.iref.c.5"></div>
    1029       <div id="rfc.iref.h.4"></div>
    10301026      <h3 id="rfc.section.3.2.4"><a href="#rfc.section.3.2.4">3.2.4</a>&nbsp;<a id="header.content-location" href="#header.content-location">Content-Location</a></h3>
    10311027      <p id="rfc.section.3.2.4.p.1">The "Content-Location" header field supplies a URI that can be used as a specific identifier for the representation in this
     
    13911387      </p>
    13921388      <h3 id="rfc.section.5.3.2"><a href="#rfc.section.5.3.2">5.3.2</a>&nbsp;<a id="HEAD" href="#HEAD">HEAD</a></h3>
    1393       <div id="rfc.iref.h.5"></div>
     1389      <div id="rfc.iref.h.1"></div>
    13941390      <div id="rfc.iref.m.2"></div>
    13951391      <p id="rfc.section.5.3.2.p.1">The HEAD method is identical to GET except that the server <em class="bcp14">MUST NOT</em> return a message body in the response. The metadata contained in the HTTP header fields in response to a HEAD request <em class="bcp14">SHOULD</em> be identical to the information sent in response to a GET request. This method can be used for obtaining metadata about the
     
    16191615      </div>
    16201616      <div id="rfc.iref.m.9"></div>
    1621       <div id="rfc.iref.h.6"></div>
    16221617      <h3 id="rfc.section.6.1.1"><a href="#rfc.section.6.1.1">6.1.1</a>&nbsp;<a id="header.max-forwards" href="#header.max-forwards">Max-Forwards</a></h3>
    16231618      <p id="rfc.section.6.1.1.p.1">The "Max-Forwards" header field provides a mechanism with the TRACE (<a href="#TRACE" id="rfc.xref.TRACE.2" title="TRACE">Section&nbsp;5.3.8</a>) and OPTIONS (<a href="#OPTIONS" id="rfc.xref.OPTIONS.2" title="OPTIONS">Section&nbsp;5.3.7</a>) methods to limit the number of times that the request is forwarded by proxies. This can be useful when the client is attempting
     
    16311626      </p>
    16321627      <div id="rfc.iref.e.1"></div>
    1633       <div id="rfc.iref.h.7"></div>
    16341628      <h3 id="rfc.section.6.1.2"><a href="#rfc.section.6.1.2">6.1.2</a>&nbsp;<a id="header.expect" href="#header.expect">Expect</a></h3>
    16351629      <p id="rfc.section.6.1.2.p.1">The "Expect" header field is used to indicate that particular server behaviors are required by the client.</p>
     
    16461640      </p>
    16471641      <p id="rfc.section.6.1.2.p.4">The only expectation defined by this specification is:</p>
    1648       <p id="rfc.section.6.1.2.p.5"><span id="rfc.iref.46"></span><span id="rfc.iref.e.2"></span> 100-continue
     1642      <p id="rfc.section.6.1.2.p.5"><span id="rfc.iref.40"></span><span id="rfc.iref.e.2"></span> 100-continue
    16491643      </p>
    16501644      <ul class="empty">
     
    17871781      </p>
    17881782      <div id="rfc.iref.a.1"></div>
    1789       <div id="rfc.iref.h.8"></div>
    17901783      <h3 id="rfc.section.6.3.2"><a href="#rfc.section.6.3.2">6.3.2</a>&nbsp;<a id="header.accept" href="#header.accept">Accept</a></h3>
    17911784      <p id="rfc.section.6.3.2.p.1">The "Accept" header field can be used by user agents to specify response media types that are acceptable. Accept header fields
     
    18851878      </p>
    18861879      <div id="rfc.iref.a.2"></div>
    1887       <div id="rfc.iref.h.9"></div>
    18881880      <h3 id="rfc.section.6.3.3"><a href="#rfc.section.6.3.3">6.3.3</a>&nbsp;<a id="header.accept-charset" href="#header.accept-charset">Accept-Charset</a></h3>
    18891881      <p id="rfc.section.6.3.3.p.1">The "Accept-Charset" header field can be used by user agents to indicate what character encodings are acceptable in a response
     
    19041896      </p>
    19051897      <div id="rfc.iref.a.3"></div>
    1906       <div id="rfc.iref.h.10"></div>
    19071898      <h3 id="rfc.section.6.3.4"><a href="#rfc.section.6.3.4">6.3.4</a>&nbsp;<a id="header.accept-encoding" href="#header.accept-encoding">Accept-Encoding</a></h3>
    19081899      <p id="rfc.section.6.3.4.p.1">The "Accept-Encoding" header field can be used by user agents to indicate what response content-codings (<a href="#content.codings" title="Content Codings">Section&nbsp;9.4</a>) are acceptable in the response. An "identity" token is used as a synonym for "no encoding" in order to communicate when
     
    19451936      </div>
    19461937      <div id="rfc.iref.a.4"></div>
    1947       <div id="rfc.iref.h.11"></div>
    19481938      <h3 id="rfc.section.6.3.5"><a href="#rfc.section.6.3.5">6.3.5</a>&nbsp;<a id="header.accept-language" href="#header.accept-language">Accept-Language</a></h3>
    19491939      <p id="rfc.section.6.3.5.p.1">The "Accept-Language" header field can be used by user agents to indicate the set of natural languages that are preferred
     
    20292019      </div>
    20302020      <div id="rfc.iref.f.1"></div>
    2031       <div id="rfc.iref.h.12"></div>
    20322021      <h3 id="rfc.section.6.5.1"><a href="#rfc.section.6.5.1">6.5.1</a>&nbsp;<a id="header.from" href="#header.from">From</a></h3>
    20332022      <p id="rfc.section.6.5.1.p.1">The "From" header field, if given, <em class="bcp14">SHOULD</em> contain an Internet e-mail address for the human user who controls the requesting user agent. The address <em class="bcp14">SHOULD</em> be machine-usable, as defined by "mailbox" in <a href="http://tools.ietf.org/html/rfc5322#section-3.4">Section 3.4</a> of <a href="#RFC5322" id="rfc.xref.RFC5322.1"><cite title="Internet Message Format">[RFC5322]</cite></a>:
     
    20502039      </p>
    20512040      <div id="rfc.iref.r.2"></div>
    2052       <div id="rfc.iref.h.13"></div>
    20532041      <h3 id="rfc.section.6.5.2"><a href="#rfc.section.6.5.2">6.5.2</a>&nbsp;<a id="header.referer" href="#header.referer">Referer</a></h3>
    20542042      <p id="rfc.section.6.5.2.p.1">The "Referer" [sic] header field allows the client to specify the URI of the resource from which the target URI was obtained
     
    20692057      </p>
    20702058      <div id="rfc.iref.u.1"></div>
    2071       <div id="rfc.iref.h.14"></div>
    20722059      <h3 id="rfc.section.6.5.3"><a href="#rfc.section.6.5.3">6.5.3</a>&nbsp;<a id="header.user-agent" href="#header.user-agent">User-Agent</a></h3>
    20732060      <p id="rfc.section.6.5.3.p.1">The "User-Agent" header field contains information about the user agent originating the request. User agents <em class="bcp14">SHOULD</em> include this field with requests.
     
    23392326      <p id="rfc.section.7.1.p.2">Note that this list is not exhaustive — it does not include extension status codes defined in other specifications.</p>
    23402327      <h2 id="rfc.section.7.2"><a href="#rfc.section.7.2">7.2</a>&nbsp;<a id="status.1xx" href="#status.1xx">Informational 1xx</a></h2>
    2341       <div id="rfc.iref.75"></div>
     2328      <div id="rfc.iref.62"></div>
    23422329      <div id="rfc.iref.s.3"></div>
    23432330      <p id="rfc.section.7.2.p.1">This class of status code indicates a provisional response, consisting only of the status-line and optional header fields,
     
    23522339         a request, then it need not forward the corresponding <a href="#status.100" class="smpl">100 (Continue)</a> response(s).)
    23532340      </p>
    2354       <div id="rfc.iref.76"></div>
     2341      <div id="rfc.iref.63"></div>
    23552342      <div id="rfc.iref.s.4"></div>
    23562343      <h3 id="rfc.section.7.2.1"><a href="#rfc.section.7.2.1">7.2.1</a>&nbsp;<a id="status.100" href="#status.100">100 Continue</a></h3>
     
    23592346         server <em class="bcp14">MUST</em> send a final response after the request has been completed. See <a href="#use.of.the.100.status" title="Use of the 100 (Continue) Status">Section&nbsp;6.1.2.1</a> for detailed discussion of the use and handling of this status code.
    23602347      </p>
    2361       <div id="rfc.iref.77"></div>
     2348      <div id="rfc.iref.64"></div>
    23622349      <div id="rfc.iref.s.5"></div>
    23632350      <h3 id="rfc.section.7.2.2"><a href="#rfc.section.7.2.2">7.2.2</a>&nbsp;<a id="status.101" href="#status.101">101 Switching Protocols</a></h3>
     
    23702357      </p>
    23712358      <h2 id="rfc.section.7.3"><a href="#rfc.section.7.3">7.3</a>&nbsp;<a id="status.2xx" href="#status.2xx">Successful 2xx</a></h2>
    2372       <div id="rfc.iref.78"></div>
     2359      <div id="rfc.iref.65"></div>
    23732360      <div id="rfc.iref.s.6"></div>
    23742361      <p id="rfc.section.7.3.p.1">This class of status code indicates that the client's request was successfully received, understood, and accepted.</p>
    2375       <div id="rfc.iref.79"></div>
     2362      <div id="rfc.iref.66"></div>
    23762363      <div id="rfc.iref.s.7"></div>
    23772364      <h3 id="rfc.section.7.3.1"><a href="#rfc.section.7.3.1">7.3.1</a>&nbsp;<a id="status.200" href="#status.200">200 OK</a></h3>
     
    23892376      <p id="rfc.section.7.3.1.p.2">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 4.1.2</a> of <a href="#Part6" id="rfc.xref.Part6.8"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Caching">[Part6]</cite></a>) to determine freshness for 200 responses.
    23902377      </p>
    2391       <div id="rfc.iref.80"></div>
     2378      <div id="rfc.iref.67"></div>
    23922379      <div id="rfc.iref.s.8"></div>
    23932380      <h3 id="rfc.section.7.3.2"><a href="#rfc.section.7.3.2">7.3.2</a>&nbsp;<a id="status.201" href="#status.201">201 Created</a></h3>
     
    24022389         the <a href="#header.location" class="smpl">Location</a> header field or, in case the Location header field was omitted, by the Effective Request URI (see <a href="p4-conditional.html#header.etag" title="ETag">Section 2.3</a> of <a href="#Part4" id="rfc.xref.Part4.12"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Conditional Requests">[Part4]</cite></a>).
    24032390      </p>
    2404       <div id="rfc.iref.81"></div>
     2391      <div id="rfc.iref.68"></div>
    24052392      <div id="rfc.iref.s.9"></div>
    24062393      <h3 id="rfc.section.7.3.3"><a href="#rfc.section.7.3.3">7.3.3</a>&nbsp;<a id="status.202" href="#status.202">202 Accepted</a></h3>
     
    24142401         user can expect the request to be fulfilled.
    24152402      </p>
    2416       <div id="rfc.iref.82"></div>
     2403      <div id="rfc.iref.69"></div>
    24172404      <div id="rfc.iref.s.10"></div>
    24182405      <h3 id="rfc.section.7.3.4"><a href="#rfc.section.7.3.4">7.3.4</a>&nbsp;<a id="status.203" href="#status.203">203 Non-Authoritative Information</a></h3>
     
    24242411      <p id="rfc.section.7.3.4.p.3">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 4.1.2</a> of <a href="#Part6" id="rfc.xref.Part6.11"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Caching">[Part6]</cite></a>) to determine freshness for 203 responses.
    24252412      </p>
    2426       <div id="rfc.iref.83"></div>
     2413      <div id="rfc.iref.70"></div>
    24272414      <div id="rfc.iref.s.11"></div>
    24282415      <h3 id="rfc.section.7.3.5"><a href="#rfc.section.7.3.5">7.3.5</a>&nbsp;<a id="status.204" href="#status.204">204 No Content</a></h3>
     
    24452432      <p id="rfc.section.7.3.5.p.5">The 204 response <em class="bcp14">MUST NOT</em> include a message body, and thus is always terminated by the first empty line after the header fields.
    24462433      </p>
    2447       <div id="rfc.iref.84"></div>
     2434      <div id="rfc.iref.71"></div>
    24482435      <div id="rfc.iref.s.12"></div>
    24492436      <h3 id="rfc.section.7.3.6"><a href="#rfc.section.7.3.6">7.3.6</a>&nbsp;<a id="status.205" href="#status.205">205 Reset Content</a></h3>
     
    24552442      </p>
    24562443      <h2 id="rfc.section.7.4"><a href="#rfc.section.7.4">7.4</a>&nbsp;<a id="status.3xx" href="#status.3xx">Redirection 3xx</a></h2>
    2457       <div id="rfc.iref.85"></div>
     2444      <div id="rfc.iref.72"></div>
    24582445      <div id="rfc.iref.s.13"></div>
    24592446      <p id="rfc.section.7.4.p.1">This class of status code indicates that further action needs to be taken by the user agent in order to fulfill the request.
     
    25012488         </p>
    25022489      </div>
    2503       <div id="rfc.iref.86"></div>
     2490      <div id="rfc.iref.73"></div>
    25042491      <div id="rfc.iref.s.14"></div>
    25052492      <h3 id="rfc.section.7.4.1"><a href="#rfc.section.7.4.1">7.4.1</a>&nbsp;<a id="status.300" href="#status.300">300 Multiple Choices</a></h3>
     
    25162503      <p id="rfc.section.7.4.1.p.4">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 4.1.2</a> of <a href="#Part6" id="rfc.xref.Part6.12"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Caching">[Part6]</cite></a>) to determine freshness for 300 responses.
    25172504      </p>
    2518       <div id="rfc.iref.87"></div>
     2505      <div id="rfc.iref.74"></div>
    25192506      <div id="rfc.iref.s.15"></div>
    25202507      <h3 id="rfc.section.7.4.2"><a href="#rfc.section.7.4.2">7.4.2</a>&nbsp;<a id="status.301" href="#status.301">301 Moved Permanently</a></h3>
     
    25302517         </p>
    25312518      </div>
    2532       <div id="rfc.iref.88"></div>
     2519      <div id="rfc.iref.75"></div>
    25332520      <div id="rfc.iref.s.16"></div>
    25342521      <h3 id="rfc.section.7.4.3"><a href="#rfc.section.7.4.3">7.4.3</a>&nbsp;<a id="status.302" href="#status.302">302 Found</a></h3>
     
    25412528         </p>
    25422529      </div>
    2543       <div id="rfc.iref.89"></div>
     2530      <div id="rfc.iref.76"></div>
    25442531      <div id="rfc.iref.s.17"></div>
    25452532      <h3 id="rfc.section.7.4.4"><a href="#rfc.section.7.4.4">7.4.4</a>&nbsp;<a id="status.303" href="#status.303">303 See Other</a></h3>
     
    25622549      <p id="rfc.section.7.4.4.p.4">Except for responses to a HEAD request, the representation of a 303 response <em class="bcp14">SHOULD</em> contain a short hypertext note with a hyperlink to the <a href="#header.location" class="smpl">Location</a> URI.
    25632550      </p>
    2564       <div id="rfc.iref.90"></div>
     2551      <div id="rfc.iref.77"></div>
    25652552      <div id="rfc.iref.s.18"></div>
    25662553      <h3 id="rfc.section.7.4.5"><a href="#rfc.section.7.4.5">7.4.5</a>&nbsp;<a id="status.305" href="#status.305">305 Use Proxy</a></h3>
    25672554      <p id="rfc.section.7.4.5.p.1">The 305 status code was defined in a previous version of this specification (see <a href="#changes.from.rfc.2616" title="Changes from RFC 2616">Appendix&nbsp;C</a>), and is now deprecated.
    25682555      </p>
    2569       <div id="rfc.iref.91"></div>
     2556      <div id="rfc.iref.78"></div>
    25702557      <div id="rfc.iref.s.19"></div>
    25712558      <h3 id="rfc.section.7.4.6"><a href="#rfc.section.7.4.6">7.4.6</a>&nbsp;<a id="status.306" href="#status.306">306 (Unused)</a></h3>
    25722559      <p id="rfc.section.7.4.6.p.1">The 306 status code was used in a previous version of the specification, is no longer used, and the code is reserved.</p>
    2573       <div id="rfc.iref.92"></div>
     2560      <div id="rfc.iref.79"></div>
    25742561      <div id="rfc.iref.s.20"></div>
    25752562      <h3 id="rfc.section.7.4.7"><a href="#rfc.section.7.4.7">7.4.7</a>&nbsp;<a id="status.307" href="#status.307">307 Temporary Redirect</a></h3>
     
    25852572      </div>
    25862573      <h2 id="rfc.section.7.5"><a href="#rfc.section.7.5">7.5</a>&nbsp;<a id="status.4xx" href="#status.4xx">Client Error 4xx</a></h2>
    2587       <div id="rfc.iref.93"></div>
     2574      <div id="rfc.iref.80"></div>
    25882575      <div id="rfc.iref.s.21"></div>
    25892576      <p id="rfc.section.7.5.p.1">The 4xx class of status code is intended for cases in which the client seems to have erred. Except when responding to a HEAD
     
    25912578         These status codes are applicable to any request method. User agents <em class="bcp14">SHOULD</em> display any included representation to the user.
    25922579      </p>
    2593       <div id="rfc.iref.94"></div>
     2580      <div id="rfc.iref.81"></div>
    25942581      <div id="rfc.iref.s.22"></div>
    25952582      <h3 id="rfc.section.7.5.1"><a href="#rfc.section.7.5.1">7.5.1</a>&nbsp;<a id="status.400" href="#status.400">400 Bad Request</a></h3>
    25962583      <p id="rfc.section.7.5.1.p.1">The server cannot or will not process the request, due to a client error (e.g., malformed syntax).</p>
    2597       <div id="rfc.iref.95"></div>
     2584      <div id="rfc.iref.82"></div>
    25982585      <div id="rfc.iref.s.23"></div>
    25992586      <h3 id="rfc.section.7.5.2"><a href="#rfc.section.7.5.2">7.5.2</a>&nbsp;<a id="status.402" href="#status.402">402 Payment Required</a></h3>
    26002587      <p id="rfc.section.7.5.2.p.1">This code is reserved for future use.</p>
    2601       <div id="rfc.iref.96"></div>
     2588      <div id="rfc.iref.83"></div>
    26022589      <div id="rfc.iref.s.24"></div>
    26032590      <h3 id="rfc.section.7.5.3"><a href="#rfc.section.7.5.3">7.5.3</a>&nbsp;<a id="status.403" href="#status.403">403 Forbidden</a></h3>
     
    26092596            (Not Found)</a>  <em class="bcp14">MAY</em> be used instead.
    26102597      </p>
    2611       <div id="rfc.iref.97"></div>
     2598      <div id="rfc.iref.84"></div>
    26122599      <div id="rfc.iref.s.25"></div>
    26132600      <h3 id="rfc.section.7.5.4"><a href="#rfc.section.7.5.4">7.5.4</a>&nbsp;<a id="status.404" href="#status.404">404 Not Found</a></h3>
     
    26172604         has been refused, or when no other response is applicable.
    26182605      </p>
    2619       <div id="rfc.iref.98"></div>
     2606      <div id="rfc.iref.85"></div>
    26202607      <div id="rfc.iref.s.26"></div>
    26212608      <h3 id="rfc.section.7.5.5"><a href="#rfc.section.7.5.5">7.5.5</a>&nbsp;<a id="status.405" href="#status.405">405 Method Not Allowed</a></h3>
    26222609      <p id="rfc.section.7.5.5.p.1">The method specified in the request-line is not allowed for the target resource. The response <em class="bcp14">MUST</em> include an <a href="#header.allow" class="smpl">Allow</a> header field containing a list of valid methods for the requested resource.
    26232610      </p>
    2624       <div id="rfc.iref.99"></div>
     2611      <div id="rfc.iref.86"></div>
    26252612      <div id="rfc.iref.s.27"></div>
    26262613      <h3 id="rfc.section.7.5.6"><a href="#rfc.section.7.5.6">7.5.6</a>&nbsp;<a id="status.406" href="#status.406">406 Not Acceptable</a></h3>
     
    26402627      <p id="rfc.section.7.5.6.p.4">If the response could be unacceptable, a user agent <em class="bcp14">SHOULD</em> temporarily stop receipt of more data and query the user for a decision on further actions.
    26412628      </p>
    2642       <div id="rfc.iref.100"></div>
     2629      <div id="rfc.iref.87"></div>
    26432630      <div id="rfc.iref.s.28"></div>
    26442631      <h3 id="rfc.section.7.5.7"><a href="#rfc.section.7.5.7">7.5.7</a>&nbsp;<a id="status.408" href="#status.408">408 Request Timeout</a></h3>
    26452632      <p id="rfc.section.7.5.7.p.1">The client did not produce a request within the time that the server was prepared to wait. The client <em class="bcp14">MAY</em> repeat the request without modifications at any later time.
    26462633      </p>
    2647       <div id="rfc.iref.101"></div>
     2634      <div id="rfc.iref.88"></div>
    26482635      <div id="rfc.iref.s.29"></div>
    26492636      <h3 id="rfc.section.7.5.8"><a href="#rfc.section.7.5.8">7.5.8</a>&nbsp;<a id="status.409" href="#status.409">409 Conflict</a></h3>
     
    26582645         contain a list of the differences between the two versions.
    26592646      </p>
    2660       <div id="rfc.iref.102"></div>
     2647      <div id="rfc.iref.89"></div>
    26612648      <div id="rfc.iref.s.30"></div>
    26622649      <h3 id="rfc.section.7.5.9"><a href="#rfc.section.7.5.9">7.5.9</a>&nbsp;<a id="status.410" href="#status.410">410 Gone</a></h3>
     
    26732660      <p id="rfc.section.7.5.9.p.3">Caches <em class="bcp14">MAY</em> use a heuristic (see <a href="p6-cache.html#heuristic.freshness" title="Calculating Heuristic Freshness">Section 4.1.2</a> of <a href="#Part6" id="rfc.xref.Part6.14"><cite title="Hypertext Transfer Protocol (HTTP/1.1): Caching">[Part6]</cite></a>) to determine freshness for 410 responses.
    26742661      </p>
    2675       <div id="rfc.iref.103"></div>
     2662      <div id="rfc.iref.90"></div>
    26762663      <div id="rfc.iref.s.31"></div>
    26772664      <h3 id="rfc.section.7.5.10"><a href="#rfc.section.7.5.10">7.5.10</a>&nbsp;<a id="status.411" href="#status.411">411 Length Required</a></h3>
     
    26792666         message.
    26802667      </p>
    2681       <div id="rfc.iref.104"></div>
     2668      <div id="rfc.iref.91"></div>
    26822669      <div id="rfc.iref.s.32"></div>
    26832670      <h3 id="rfc.section.7.5.11"><a href="#rfc.section.7.5.11">7.5.11</a>&nbsp;<a id="status.413" href="#status.413">413 Request Representation Too Large</a></h3>
     
    26872674      <p id="rfc.section.7.5.11.p.2">If the condition is temporary, the server <em class="bcp14">SHOULD</em> include a <a href="#header.retry-after" class="smpl">Retry-After</a> header field to indicate that it is temporary and after what time the client <em class="bcp14">MAY</em> try again.
    26882675      </p>
    2689       <div id="rfc.iref.105"></div>
     2676      <div id="rfc.iref.92"></div>
    26902677      <div id="rfc.iref.s.33"></div>
    26912678      <h3 id="rfc.section.7.5.12"><a href="#rfc.section.7.5.12">7.5.12</a>&nbsp;<a id="status.414" href="#status.414">414 URI Too Long</a></h3>
     
    26962683         in some servers using fixed-length buffers for reading or manipulating the request-target.
    26972684      </p>
    2698       <div id="rfc.iref.106"></div>
     2685      <div id="rfc.iref.93"></div>
    26992686      <div id="rfc.iref.s.34"></div>
    27002687      <h3 id="rfc.section.7.5.13"><a href="#rfc.section.7.5.13">7.5.13</a>&nbsp;<a id="status.415" href="#status.415">415 Unsupported Media Type</a></h3>
     
    27022689         on the target resource.
    27032690      </p>
    2704       <div id="rfc.iref.107"></div>
     2691      <div id="rfc.iref.94"></div>
    27052692      <div id="rfc.iref.s.35"></div>
    27062693      <h3 id="rfc.section.7.5.14"><a href="#rfc.section.7.5.14">7.5.14</a>&nbsp;<a id="status.417" href="#status.417">417 Expectation Failed</a></h3>
     
    27082695         not be met by the next-hop server.
    27092696      </p>
    2710       <div id="rfc.iref.108"></div>
     2697      <div id="rfc.iref.95"></div>
    27112698      <div id="rfc.iref.s.36"></div>
    27122699      <h3 id="rfc.section.7.5.15"><a href="#rfc.section.7.5.15">7.5.15</a>&nbsp;<a id="status.426" href="#status.426">426 Upgrade Required</a></h3>
     
    27252712      </p>
    27262713      <h2 id="rfc.section.7.6"><a href="#rfc.section.7.6">7.6</a>&nbsp;<a id="status.5xx" href="#status.5xx">Server Error 5xx</a></h2>
    2727       <div id="rfc.iref.109"></div>
     2714      <div id="rfc.iref.96"></div>
    27282715      <div id="rfc.iref.s.37"></div>
    27292716      <p id="rfc.section.7.6.p.1">Response status codes beginning with the digit "5" indicate cases in which the server is aware that it has erred or is incapable
     
    27312718         User agents <em class="bcp14">SHOULD</em> display any included representation to the user. These response codes are applicable to any request method.
    27322719      </p>
    2733       <div id="rfc.iref.110"></div>
     2720      <div id="rfc.iref.97"></div>
    27342721      <div id="rfc.iref.s.38"></div>
    27352722      <h3 id="rfc.section.7.6.1"><a href="#rfc.section.7.6.1">7.6.1</a>&nbsp;<a id="status.500" href="#status.500">500 Internal Server Error</a></h3>
    27362723      <p id="rfc.section.7.6.1.p.1">The server encountered an unexpected condition which prevented it from fulfilling the request.</p>
    2737       <div id="rfc.iref.111"></div>
     2724      <div id="rfc.iref.98"></div>
    27382725      <div id="rfc.iref.s.39"></div>
    27392726      <h3 id="rfc.section.7.6.2"><a href="#rfc.section.7.6.2">7.6.2</a>&nbsp;<a id="status.501" href="#status.501">501 Not Implemented</a></h3>
     
    27412728         does not recognize the request method and is not capable of supporting it for any resource.
    27422729      </p>
    2743       <div id="rfc.iref.112"></div>
     2730      <div id="rfc.iref.99"></div>
    27442731      <div id="rfc.iref.s.40"></div>
    27452732      <h3 id="rfc.section.7.6.3"><a href="#rfc.section.7.6.3">7.6.3</a>&nbsp;<a id="status.502" href="#status.502">502 Bad Gateway</a></h3>
     
    27472734         to fulfill the request.
    27482735      </p>
    2749       <div id="rfc.iref.113"></div>
     2736      <div id="rfc.iref.100"></div>
    27502737      <div id="rfc.iref.s.41"></div>
    27512738      <h3 id="rfc.section.7.6.4"><a href="#rfc.section.7.6.4">7.6.4</a>&nbsp;<a id="status.503" href="#status.503">503 Service Unavailable</a></h3>
     
    27602747         </p>
    27612748      </div>
    2762       <div id="rfc.iref.114"></div>
     2749      <div id="rfc.iref.101"></div>
    27632750      <div id="rfc.iref.s.42"></div>
    27642751      <h3 id="rfc.section.7.6.5"><a href="#rfc.section.7.6.5">7.6.5</a>&nbsp;<a id="status.504" href="#status.504">504 Gateway Timeout</a></h3>
     
    27712758         </p>
    27722759      </div>
    2773       <div id="rfc.iref.115"></div>
     2760      <div id="rfc.iref.102"></div>
    27742761      <div id="rfc.iref.s.43"></div>
    27752762      <h3 id="rfc.section.7.6.6"><a href="#rfc.section.7.6.6">7.6.6</a>&nbsp;<a id="status.505" href="#status.505">505 HTTP Version Not Supported</a></h3>
     
    28052792      </div>
    28062793      <div id="rfc.iref.l.1"></div>
    2807       <div id="rfc.iref.h.15"></div>
    28082794      <h3 id="rfc.section.8.1.1"><a href="#rfc.section.8.1.1">8.1.1</a>&nbsp;<a id="header.location" href="#header.location">Location</a></h3>
    28092795      <p id="rfc.section.8.1.1.p.1">The "Location" header field <em class="bcp14">MAY</em> be sent in responses to refer to a specific resource in accordance with the semantics of the status code.
     
    28362822      </div>
    28372823      <div id="rfc.iref.r.3"></div>
    2838       <div id="rfc.iref.h.16"></div>
    28392824      <h3 id="rfc.section.8.1.2"><a href="#rfc.section.8.1.2">8.1.2</a>&nbsp;<a id="header.retry-after" href="#header.retry-after">Retry-After</a></h3>
    28402825      <p id="rfc.section.8.1.2.p.1">The header "Retry-After" field can be used with a <a href="#status.503" class="smpl">503 (Service
     
    28782863      </div>
    28792864      <div id="rfc.iref.d.2"></div>
    2880       <div id="rfc.iref.h.17"></div>
    28812865      <h3 id="rfc.section.8.2.1"><a href="#rfc.section.8.2.1">8.2.1</a>&nbsp;<a id="header.date" href="#header.date">Date</a></h3>
    28822866      <p id="rfc.section.8.2.1.p.1">The "Date" header field represents the date and time at which the message was originated, having the same semantics as the
     
    29082892      </p>
    29092893      <div id="rfc.iref.v.1"></div>
    2910       <div id="rfc.iref.h.18"></div>
    29112894      <h3 id="rfc.section.8.2.2"><a href="#rfc.section.8.2.2">8.2.2</a>&nbsp;<a id="header.vary" href="#header.vary">Vary</a></h3>
    29122895      <p id="rfc.section.8.2.2.p.1">The "Vary" header field conveys the set of header fields that were used to select the representation.</p>
     
    29812964      </div>
    29822965      <div id="rfc.iref.a.5"></div>
    2983       <div id="rfc.iref.h.19"></div>
    29842966      <h3 id="rfc.section.8.4.1"><a href="#rfc.section.8.4.1">8.4.1</a>&nbsp;<a id="header.allow" href="#header.allow">Allow</a></h3>
    29852967      <p id="rfc.section.8.4.1.p.1">The "Allow" header field lists the set of methods advertised as supported by the target resource. The purpose of this field
     
    29942976      </p>
    29952977      <div id="rfc.iref.s.44"></div>
    2996       <div id="rfc.iref.h.20"></div>
    29972978      <h3 id="rfc.section.8.4.2"><a href="#rfc.section.8.4.2">8.4.2</a>&nbsp;<a id="header.server" href="#header.server">Server</a></h3>
    29982979      <p id="rfc.section.8.4.2.p.1">The "Server" header field contains information about the software used by the origin server to handle the request.</p>
     
    41604141      </p>
    41614142      <div id="rfc.iref.m.10"></div>
    4162       <div id="rfc.iref.h.21"></div>
    41634143      <h2 id="rfc.section.A.1"><a href="#rfc.section.A.1">A.1</a>&nbsp;<a id="mime-version" href="#mime-version">MIME-Version</a></h2>
    41644144      <p id="rfc.section.A.1.p.1">HTTP is not a MIME-compliant protocol. However, HTTP/1.1 messages <em class="bcp14">MAY</em> include a single MIME-Version header field to indicate what version of the MIME protocol was used to construct the message.
     
    41924172      </p>
    41934173      <div id="rfc.iref.c.12"></div>
    4194       <div id="rfc.iref.h.22"></div>
    41954174      <h2 id="rfc.section.A.5"><a href="#rfc.section.A.5">A.5</a>&nbsp;<a id="no.content-transfer-encoding" href="#no.content-transfer-encoding">No Content-Transfer-Encoding</a></h2>
    41964175      <p id="rfc.section.A.5.p.1">HTTP does not use the Content-Transfer-Encoding field of MIME. Proxies and gateways from MIME-compliant protocols to HTTP <em class="bcp14">MUST</em> remove any Content-Transfer-Encoding prior to delivering the response message to an HTTP client.
     
    50204999         <ul class="ind">
    50215000            <li><a id="rfc.index.1" href="#rfc.index.1"><b>1</b></a><ul>
    5022                   <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">6.1.2.1</a>, <a href="#rfc.xref.status.100.2">6.1.2.1</a>, <a href="#rfc.xref.status.100.3">7.1</a>, <a href="#rfc.iref.76"><b>7.2.1</b></a>, <a href="#rfc.xref.status.100.4">10.2.3</a></li>
    5023                   <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.46"><b>6.1.2</b></a></li>
    5024                   <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">7.1</a>, <a href="#rfc.iref.77"><b>7.2.2</b></a>, <a href="#rfc.xref.status.101.2">10.2.3</a></li>
    5025                   <li>1xx Informational (status code class)&nbsp;&nbsp;<a href="#rfc.iref.75"><b>7.2</b></a></li>
     5001                  <li>100 Continue (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.100.1">6.1.2.1</a>, <a href="#rfc.xref.status.100.2">6.1.2.1</a>, <a href="#rfc.xref.status.100.3">7.1</a>, <a href="#rfc.iref.63"><b>7.2.1</b></a>, <a href="#rfc.xref.status.100.4">10.2.3</a></li>
     5002                  <li>100-continue (expect value)&nbsp;&nbsp;<a href="#rfc.iref.40"><b>6.1.2</b></a></li>
     5003                  <li>101 Switching Protocols (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.101.1">7.1</a>, <a href="#rfc.iref.64"><b>7.2.2</b></a>, <a href="#rfc.xref.status.101.2">10.2.3</a></li>
     5004                  <li>1xx Informational (status code class)&nbsp;&nbsp;<a href="#rfc.iref.62"><b>7.2</b></a></li>
    50265005               </ul>
    50275006            </li>
    50285007            <li><a id="rfc.index.2" href="#rfc.index.2"><b>2</b></a><ul>
    5029                   <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">7.1</a>, <a href="#rfc.iref.79"><b>7.3.1</b></a>, <a href="#rfc.xref.status.200.2">10.2.3</a></li>
    5030                   <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">7.1</a>, <a href="#rfc.iref.80"><b>7.3.2</b></a>, <a href="#rfc.xref.status.201.2">10.2.3</a></li>
    5031                   <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">7.1</a>, <a href="#rfc.iref.81"><b>7.3.3</b></a>, <a href="#rfc.xref.status.202.2">10.2.3</a></li>
    5032                   <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">7.1</a>, <a href="#rfc.iref.82"><b>7.3.4</b></a>, <a href="#rfc.xref.status.203.2">10.2.3</a>, <a href="#rfc.xref.status.203.3">C</a></li>
    5033                   <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">7.1</a>, <a href="#rfc.iref.83"><b>7.3.5</b></a>, <a href="#rfc.xref.status.204.2">10.2.3</a></li>
    5034                   <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">7.1</a>, <a href="#rfc.iref.84"><b>7.3.6</b></a>, <a href="#rfc.xref.status.205.2">10.2.3</a></li>
    5035                   <li>2xx Successful (status code class)&nbsp;&nbsp;<a href="#rfc.iref.78"><b>7.3</b></a></li>
     5008                  <li>200 OK (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.200.1">7.1</a>, <a href="#rfc.iref.66"><b>7.3.1</b></a>, <a href="#rfc.xref.status.200.2">10.2.3</a></li>
     5009                  <li>201 Created (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.201.1">7.1</a>, <a href="#rfc.iref.67"><b>7.3.2</b></a>, <a href="#rfc.xref.status.201.2">10.2.3</a></li>
     5010                  <li>202 Accepted (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.202.1">7.1</a>, <a href="#rfc.iref.68"><b>7.3.3</b></a>, <a href="#rfc.xref.status.202.2">10.2.3</a></li>
     5011                  <li>203 Non-Authoritative Information (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.203.1">7.1</a>, <a href="#rfc.iref.69"><b>7.3.4</b></a>, <a href="#rfc.xref.status.203.2">10.2.3</a>, <a href="#rfc.xref.status.203.3">C</a></li>
     5012                  <li>204 No Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.204.1">7.1</a>, <a href="#rfc.iref.70"><b>7.3.5</b></a>, <a href="#rfc.xref.status.204.2">10.2.3</a></li>
     5013                  <li>205 Reset Content (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.205.1">7.1</a>, <a href="#rfc.iref.71"><b>7.3.6</b></a>, <a href="#rfc.xref.status.205.2">10.2.3</a></li>
     5014                  <li>2xx Successful (status code class)&nbsp;&nbsp;<a href="#rfc.iref.65"><b>7.3</b></a></li>
    50365015               </ul>
    50375016            </li>
    50385017            <li><a id="rfc.index.3" href="#rfc.index.3"><b>3</b></a><ul>
    5039                   <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">7.1</a>, <a href="#rfc.iref.86"><b>7.4.1</b></a>, <a href="#rfc.xref.status.300.2">10.2.3</a></li>
    5040                   <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">7.1</a>, <a href="#rfc.iref.87"><b>7.4.2</b></a>, <a href="#rfc.xref.status.301.2">10.2.3</a>, <a href="#rfc.xref.status.301.3">C</a></li>
    5041                   <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">7.1</a>, <a href="#rfc.iref.88"><b>7.4.3</b></a>, <a href="#rfc.xref.status.302.2">10.2.3</a>, <a href="#rfc.xref.status.302.3">C</a></li>
    5042                   <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">7.1</a>, <a href="#rfc.iref.89"><b>7.4.4</b></a>, <a href="#rfc.xref.status.303.2">10.2.3</a></li>
    5043                   <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">7.1</a>, <a href="#rfc.iref.90"><b>7.4.5</b></a>, <a href="#rfc.xref.status.305.2">10.2.3</a>, <a href="#rfc.xref.status.305.3">C</a></li>
    5044                   <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.91"><b>7.4.6</b></a>, <a href="#rfc.xref.status.306.1">10.2.3</a></li>
    5045                   <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">7.1</a>, <a href="#rfc.iref.92"><b>7.4.7</b></a>, <a href="#rfc.xref.status.307.2">10.2.3</a>, <a href="#rfc.xref.status.307.3">C</a></li>
    5046                   <li>3xx Redirection (status code class)&nbsp;&nbsp;<a href="#rfc.iref.85"><b>7.4</b></a>, <a href="#rfc.xref.status.3xx.1">C</a></li>
     5018                  <li>300 Multiple Choices (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.300.1">7.1</a>, <a href="#rfc.iref.73"><b>7.4.1</b></a>, <a href="#rfc.xref.status.300.2">10.2.3</a></li>
     5019                  <li>301 Moved Permanently (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.301.1">7.1</a>, <a href="#rfc.iref.74"><b>7.4.2</b></a>, <a href="#rfc.xref.status.301.2">10.2.3</a>, <a href="#rfc.xref.status.301.3">C</a></li>
     5020                  <li>302 Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.302.1">7.1</a>, <a href="#rfc.iref.75"><b>7.4.3</b></a>, <a href="#rfc.xref.status.302.2">10.2.3</a>, <a href="#rfc.xref.status.302.3">C</a></li>
     5021                  <li>303 See Other (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.303.1">7.1</a>, <a href="#rfc.iref.76"><b>7.4.4</b></a>, <a href="#rfc.xref.status.303.2">10.2.3</a></li>
     5022                  <li>305 Use Proxy (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.305.1">7.1</a>, <a href="#rfc.iref.77"><b>7.4.5</b></a>, <a href="#rfc.xref.status.305.2">10.2.3</a>, <a href="#rfc.xref.status.305.3">C</a></li>
     5023                  <li>306 (Unused) (status code)&nbsp;&nbsp;<a href="#rfc.iref.78"><b>7.4.6</b></a>, <a href="#rfc.xref.status.306.1">10.2.3</a></li>
     5024                  <li>307 Temporary Redirect (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.307.1">7.1</a>, <a href="#rfc.iref.79"><b>7.4.7</b></a>, <a href="#rfc.xref.status.307.2">10.2.3</a>, <a href="#rfc.xref.status.307.3">C</a></li>
     5025                  <li>3xx Redirection (status code class)&nbsp;&nbsp;<a href="#rfc.iref.72"><b>7.4</b></a>, <a href="#rfc.xref.status.3xx.1">C</a></li>
    50475026               </ul>
    50485027            </li>
    50495028            <li><a id="rfc.index.4" href="#rfc.index.4"><b>4</b></a><ul>
    5050                   <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">7.1</a>, <a href="#rfc.iref.94"><b>7.5.1</b></a>, <a href="#rfc.xref.status.400.2">10.2.3</a></li>
    5051                   <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">7.1</a>, <a href="#rfc.iref.95"><b>7.5.2</b></a>, <a href="#rfc.xref.status.402.2">10.2.3</a></li>
    5052                   <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">7.1</a>, <a href="#rfc.iref.96"><b>7.5.3</b></a>, <a href="#rfc.xref.status.403.2">10.2.3</a></li>
    5053                   <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">7.1</a>, <a href="#rfc.iref.97"><b>7.5.4</b></a>, <a href="#rfc.xref.status.404.2">10.2.3</a></li>
    5054                   <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">7.1</a>, <a href="#rfc.iref.98"><b>7.5.5</b></a>, <a href="#rfc.xref.status.405.2">10.2.3</a></li>
    5055                   <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">7.1</a>, <a href="#rfc.iref.99"><b>7.5.6</b></a>, <a href="#rfc.xref.status.406.2">10.2.3</a></li>
    5056                   <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">7.1</a>, <a href="#rfc.iref.100"><b>7.5.7</b></a>, <a href="#rfc.xref.status.408.2">10.2.3</a></li>
    5057                   <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">7.1</a>, <a href="#rfc.iref.101"><b>7.5.8</b></a>, <a href="#rfc.xref.status.409.2">10.2.3</a></li>
    5058                   <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">7.1</a>, <a href="#rfc.iref.102"><b>7.5.9</b></a>, <a href="#rfc.xref.status.410.2">10.2.3</a></li>
    5059                   <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">7.1</a>, <a href="#rfc.iref.103"><b>7.5.10</b></a>, <a href="#rfc.xref.status.411.2">10.2.3</a></li>
    5060                   <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">7.1</a>, <a href="#rfc.iref.104"><b>7.5.11</b></a>, <a href="#rfc.xref.status.413.2">10.2.3</a></li>
    5061                   <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">7.1</a>, <a href="#rfc.iref.105"><b>7.5.12</b></a>, <a href="#rfc.xref.status.414.2">10.2.3</a></li>
    5062                   <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">7.1</a>, <a href="#rfc.iref.106"><b>7.5.13</b></a>, <a href="#rfc.xref.status.415.2">10.2.3</a></li>
    5063                   <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">7.1</a>, <a href="#rfc.iref.107"><b>7.5.14</b></a>, <a href="#rfc.xref.status.417.2">10.2.3</a></li>
    5064                   <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">7.1</a>, <a href="#rfc.iref.108"><b>7.5.15</b></a>, <a href="#rfc.xref.status.426.2">10.2.3</a>, <a href="#rfc.xref.status.426.3">C</a></li>
    5065                   <li>4xx Client Error (status code class)&nbsp;&nbsp;<a href="#rfc.iref.93"><b>7.5</b></a></li>
     5029                  <li>400 Bad Request (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.400.1">7.1</a>, <a href="#rfc.iref.81"><b>7.5.1</b></a>, <a href="#rfc.xref.status.400.2">10.2.3</a></li>
     5030                  <li>402 Payment Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.402.1">7.1</a>, <a href="#rfc.iref.82"><b>7.5.2</b></a>, <a href="#rfc.xref.status.402.2">10.2.3</a></li>
     5031                  <li>403 Forbidden (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.403.1">7.1</a>, <a href="#rfc.iref.83"><b>7.5.3</b></a>, <a href="#rfc.xref.status.403.2">10.2.3</a></li>
     5032                  <li>404 Not Found (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.404.1">7.1</a>, <a href="#rfc.iref.84"><b>7.5.4</b></a>, <a href="#rfc.xref.status.404.2">10.2.3</a></li>
     5033                  <li>405 Method Not Allowed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.405.1">7.1</a>, <a href="#rfc.iref.85"><b>7.5.5</b></a>, <a href="#rfc.xref.status.405.2">10.2.3</a></li>
     5034                  <li>406 Not Acceptable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.406.1">7.1</a>, <a href="#rfc.iref.86"><b>7.5.6</b></a>, <a href="#rfc.xref.status.406.2">10.2.3</a></li>
     5035                  <li>408 Request Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.408.1">7.1</a>, <a href="#rfc.iref.87"><b>7.5.7</b></a>, <a href="#rfc.xref.status.408.2">10.2.3</a></li>
     5036                  <li>409 Conflict (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.409.1">7.1</a>, <a href="#rfc.iref.88"><b>7.5.8</b></a>, <a href="#rfc.xref.status.409.2">10.2.3</a></li>
     5037                  <li>410 Gone (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.410.1">7.1</a>, <a href="#rfc.iref.89"><b>7.5.9</b></a>, <a href="#rfc.xref.status.410.2">10.2.3</a></li>
     5038                  <li>411 Length Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.411.1">7.1</a>, <a href="#rfc.iref.90"><b>7.5.10</b></a>, <a href="#rfc.xref.status.411.2">10.2.3</a></li>
     5039                  <li>413 Request Representation Too Large (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.413.1">7.1</a>, <a href="#rfc.iref.91"><b>7.5.11</b></a>, <a href="#rfc.xref.status.413.2">10.2.3</a></li>
     5040                  <li>414 URI Too Long (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.414.1">7.1</a>, <a href="#rfc.iref.92"><b>7.5.12</b></a>, <a href="#rfc.xref.status.414.2">10.2.3</a></li>
     5041                  <li>415 Unsupported Media Type (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.415.1">7.1</a>, <a href="#rfc.iref.93"><b>7.5.13</b></a>, <a href="#rfc.xref.status.415.2">10.2.3</a></li>
     5042                  <li>417 Expectation Failed (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.417.1">7.1</a>, <a href="#rfc.iref.94"><b>7.5.14</b></a>, <a href="#rfc.xref.status.417.2">10.2.3</a></li>
     5043                  <li>426 Upgrade Required (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.426.1">7.1</a>, <a href="#rfc.iref.95"><b>7.5.15</b></a>, <a href="#rfc.xref.status.426.2">10.2.3</a>, <a href="#rfc.xref.status.426.3">C</a></li>
     5044                  <li>4xx Client Error (status code class)&nbsp;&nbsp;<a href="#rfc.iref.80"><b>7.5</b></a></li>
    50665045               </ul>
    50675046            </li>
    50685047            <li><a id="rfc.index.5" href="#rfc.index.5"><b>5</b></a><ul>
    5069                   <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">7.1</a>, <a href="#rfc.iref.110"><b>7.6.1</b></a>, <a href="#rfc.xref.status.500.2">10.2.3</a></li>
    5070                   <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">7.1</a>, <a href="#rfc.iref.111"><b>7.6.2</b></a>, <a href="#rfc.xref.status.501.2">10.2.3</a></li>
    5071                   <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">7.1</a>, <a href="#rfc.iref.112"><b>7.6.3</b></a>, <a href="#rfc.xref.status.502.2">10.2.3</a></li>
    5072                   <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">7.1</a>, <a href="#rfc.iref.113"><b>7.6.4</b></a>, <a href="#rfc.xref.status.503.2">10.2.3</a></li>
    5073                   <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">7.1</a>, <a href="#rfc.iref.114"><b>7.6.5</b></a>, <a href="#rfc.xref.status.504.2">10.2.3</a></li>
    5074                   <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">7.1</a>, <a href="#rfc.iref.115"><b>7.6.6</b></a>, <a href="#rfc.xref.status.505.2">10.2.3</a></li>
    5075                   <li>5xx Server Error (status code class)&nbsp;&nbsp;<a href="#rfc.iref.109"><b>7.6</b></a></li>
     5048                  <li>500 Internal Server Error (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.500.1">7.1</a>, <a href="#rfc.iref.97"><b>7.6.1</b></a>, <a href="#rfc.xref.status.500.2">10.2.3</a></li>
     5049                  <li>501 Not Implemented (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.501.1">7.1</a>, <a href="#rfc.iref.98"><b>7.6.2</b></a>, <a href="#rfc.xref.status.501.2">10.2.3</a></li>
     5050                  <li>502 Bad Gateway (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.502.1">7.1</a>, <a href="#rfc.iref.99"><b>7.6.3</b></a>, <a href="#rfc.xref.status.502.2">10.2.3</a></li>
     5051                  <li>503 Service Unavailable (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.503.1">7.1</a>, <a href="#rfc.iref.100"><b>7.6.4</b></a>, <a href="#rfc.xref.status.503.2">10.2.3</a></li>
     5052                  <li>504 Gateway Timeout (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.504.1">7.1</a>, <a href="#rfc.iref.101"><b>7.6.5</b></a>, <a href="#rfc.xref.status.504.2">10.2.3</a></li>
     5053                  <li>505 HTTP Version Not Supported (status code)&nbsp;&nbsp;<a href="#rfc.xref.status.505.1">7.1</a>, <a href="#rfc.iref.102"><b>7.6.6</b></a>, <a href="#rfc.xref.status.505.2">10.2.3</a></li>
     5054                  <li>5xx Server Error (status code class)&nbsp;&nbsp;<a href="#rfc.iref.96"><b>7.6</b></a></li>
    50765055               </ul>
    50775056            </li>
     
    51925171            </li>
    51935172            <li><a id="rfc.index.H" href="#rfc.index.H"><b>H</b></a><ul>
    5194                   <li>HEAD method&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">5.1</a>, <a href="#rfc.iref.h.5"><b>5.3.2</b></a>, <a href="#rfc.xref.HEAD.2">10.1.3</a></li>
    5195                   <li>Header Fields&nbsp;&nbsp;
    5196                      <ul>
    5197                         <li>Accept&nbsp;&nbsp;<a href="#rfc.xref.header.accept.1">3.5.1</a>, <a href="#rfc.xref.header.accept.2">6.3</a>, <a href="#rfc.iref.h.8"><b>6.3.2</b></a>, <a href="#rfc.xref.header.accept.3">9.5</a>, <a href="#rfc.xref.header.accept.4">10.3.2</a></li>
    5198                         <li>Accept-Charset&nbsp;&nbsp;<a href="#rfc.xref.header.accept-charset.1">3.5.1</a>, <a href="#rfc.xref.header.accept-charset.2">6.3</a>, <a href="#rfc.iref.h.9"><b>6.3.3</b></a>, <a href="#rfc.xref.header.accept-charset.3">10.3.2</a>, <a href="#rfc.xref.header.accept-charset.4">C</a></li>
    5199                         <li>Accept-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.accept-encoding.1">3.5.1</a>, <a href="#rfc.xref.header.accept-encoding.2">6.3</a>, <a href="#rfc.iref.h.10"><b>6.3.4</b></a>, <a href="#rfc.xref.header.accept-encoding.3">9.4</a>, <a href="#rfc.xref.header.accept-encoding.4">10.3.2</a>, <a href="#rfc.xref.header.accept-encoding.5">10.4.2</a></li>
    5200                         <li>Accept-Language&nbsp;&nbsp;<a href="#rfc.xref.header.accept-language.1">3.5.1</a>, <a href="#rfc.xref.header.accept-language.2">6.3</a>, <a href="#rfc.iref.h.11"><b>6.3.5</b></a>, <a href="#rfc.xref.header.accept-language.3">10.3.2</a></li>
    5201                         <li>Allow&nbsp;&nbsp;<a href="#rfc.xref.header.allow.1">5.1</a>, <a href="#rfc.xref.header.allow.2">8.4</a>, <a href="#rfc.iref.h.19"><b>8.4.1</b></a>, <a href="#rfc.xref.header.allow.3">10.3.2</a>, <a href="#rfc.xref.header.allow.4">C</a></li>
    5202                         <li>Content-Encoding&nbsp;&nbsp;<a href="#rfc.xref.header.content-encoding.1">3.2</a>, <a href="#rfc.iref.h.2"><b>3.2.2</b></a>, <a href="#rfc.xref.header.content-encoding.2">9.4</a>, <a href="#rfc.xref.header.content-encoding.3">10.3.2</a></li>
    5203                         <li>Content-Language&nbsp;&nbsp;<a href="#rfc.xref.header.content-language.1">3.2</a>, <a href="#rfc.iref.h.3"><b>3.2.3</b></a>, <a href="#rfc.xref.header.content-language.2">10.3.2</a></li>
    5204                         <li>Content-Location&nbsp;&nbsp;<a href="#rfc.xref.header.content-location.1">3.2</a>, <a href="#rfc.iref.h.4"><b>3.2.4</b></a>, <a href="#rfc.xref.header.content-location.2">5.3.3</a>, <a href="#rfc.xref.header.content-location.3">8.1.1</a>, <a href="#rfc.xref.header.content-location.4">10.3.2</a>, <a href="#rfc.xref.header.content-location.5">C</a></li>
    5205                         <li>Content-Transfer-Encoding&nbsp;&nbsp;<a href="#rfc.iref.h.22">A.5</a>, <a href="#rfc.xref.no.content-transfer-encoding.1">C</a></li>
    5206                         <li>Content-Type&nbsp;&nbsp;<a href="#rfc.xref.header.content-type.1">3.2</a>, <a href="#rfc.iref.h.1"><b>3.2.1</b></a>, <a href="#rfc.xref.header.content-type.2">7</a>, <a href="#rfc.xref.header.content-type.3">9.5</a>, <a href="#rfc.xref.header.content-type.4">10.3.1</a>, <a href="#rfc.xref.header.content-type.5">10.3.2</a></li>
    5207                         <li>Date&nbsp;&nbsp;<a href="#rfc.xref.header.date.1">3</a>, <a href="#rfc.xref.header.date.2">8.2</a>, <a href="#rfc.iref.h.17"><b>8.2.1</b></a>, <a href="#rfc.xref.header.date.3">10.3.2</a></li>
    5208                         <li>Expect&nbsp;&nbsp;<a href="#rfc.xref.header.expect.1">6.1</a>, <a href="#rfc.iref.h.7"><b>6.1.2</b></a>, <a href="#rfc.xref.header.expect.2">7.5.14</a>, <a href="#rfc.xref.header.expect.3">10.3.2</a>, <a href="#rfc.xref.header.expect.4">C</a></li>
    5209                         <li>From&nbsp;&nbsp;<a href="#rfc.xref.header.from.1">6.5</a>, <a href="#rfc.iref.h.12"><b>6.5.1</b></a>, <a href="#rfc.xref.header.from.2">10.3.2</a></li>
    5210                         <li>Location&nbsp;&nbsp;<a href="#rfc.xref.header.location.1">5.3.3</a>, <a href="#rfc.xref.header.location.2">7.4</a>, <a href="#rfc.xref.header.location.3">8.1</a>, <a href="#rfc.iref.h.15"><b>8.1.1</b></a>, <a href="#rfc.xref.header.location.4">10.3.2</a>, <a href="#rfc.xref.header.location.5">C</a></li>
    5211                         <li>Max-Forwards&nbsp;&nbsp;<a href="#rfc.xref.header.max-forwards.1">5.3.7</a>, <a href="#rfc.xref.header.max-forwards.2">5.3.8</a>, <a href="#rfc.xref.header.max-forwards.3">6.1</a>, <a href="#rfc.iref.h.6"><b>6.1.1</b></a>, <a href="#rfc.xref.header.max-forwards.4">10.3.2</a>, <a href="#rfc.xref.header.max-forwards.5">C</a></li>
    5212                         <li>MIME-Version&nbsp;&nbsp;<a href="#rfc.xref.mime-version.1">10.3.2</a>, <a href="#rfc.iref.h.21"><b>A.1</b></a></li>
    5213                         <li>Referer&nbsp;&nbsp;<a href="#rfc.xref.header.referer.1">6.5</a>, <a href="#rfc.iref.h.13"><b>6.5.2</b></a>, <a href="#rfc.xref.header.referer.2">10.3.2</a>, <a href="#rfc.xref.header.referer.3">C</a></li>
    5214                         <li>Retry-After&nbsp;&nbsp;<a href="#rfc.xref.header.retry-after.1">7.6.4</a>, <a href="#rfc.xref.header.retry-after.2">8.1</a>, <a href="#rfc.iref.h.16"><b>8.1.2</b></a>, <a href="#rfc.xref.header.retry-after.3">10.3.2</a></li>
    5215                         <li>Server&nbsp;&nbsp;<a href="#rfc.xref.header.server.1">8.4</a>, <a href="#rfc.iref.h.20"><b>8.4.2</b></a>, <a href="#rfc.xref.header.server.2">10.3.2</a>, <a href="#rfc.xref.header.server.3">11.1</a>, <a href="#rfc.xref.header.server.4">C</a></li>
    5216                         <li>User-Agent&nbsp;&nbsp;<a href="#rfc.xref.header.user-agent.1">3.5.1</a>, <a href="#rfc.xref.header.user-agent.2">6.5</a>, <a href="#rfc.iref.h.14"><b>6.5.3</b></a>, <a href="#rfc.xref.header.user-agent.3">10.3.2</a>, <a href="#rfc.xref.header.user-agent.4">11.1</a></li>
    5217                         <li>Vary&nbsp;&nbsp;<a href="#rfc.xref.header.vary.1">3.5.1</a>, <a href="#rfc.xref.header.vary.2">8.2</a>, <a href="#rfc.iref.h.18"><b>8.2.2</b></a>, <a href="#rfc.xref.header.vary.3">10.3.2</a></li>
    5218                      </ul>
    5219                   </li>
     5173                  <li>HEAD method&nbsp;&nbsp;<a href="#rfc.xref.HEAD.1">5.1</a>, <a href="#rfc.iref.h.1"><b>5.3.2</b></a>, <a href="#rfc.xref.HEAD.2">10.1.3</a></li>
    52205174               </ul>
    52215175            </li>
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