Changeset 245 for draft-ietf-httpbis


Ignore:
Timestamp:
15/05/08 11:38:23 (14 years ago)
Author:
julian.reschke@…
Message:

Resolve #116: allow weak entity tags in all requests except range requests (closes #116).

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

Legend:

Unmodified
Added
Removed

  • draft-ietf-httpbis/latest/p4-conditional.html

    r244 r245  
    444444         <tr>
    445445            <td class="header left"></td>
    446             <td class="header right">May 1, 2008</td>
     446            <td class="header right">May 15, 2008</td>
    447447         </tr>
    448448      </table>
    … …  
    634634         is usable for a sub-range retrieval, since otherwise the client might end up with an internally inconsistent entity.
    635635      </p>
    636       <p id="rfc.section.5.p.6">Clients <em class="bcp14">MAY</em> issue simple (non-subrange) GET requests with either weak validators or strong validators. Clients <em class="bcp14">MUST NOT</em> use weak validators in other forms of request.
     636      <p id="rfc.section.5.p.6">Clients <em class="bcp14">MUST NOT</em> use weak validators in range requests (<a href="#Part5" id="rfc.xref.Part5.2"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>).
    637637      </p>
    638638      <p id="rfc.section.5.p.7">The only function that HTTP/1.1 defines on validators is comparison. There are two validator comparison functions, depending
    … …  
    678678         it <em class="bcp14">MAY</em> do this only if the Last-Modified time is strong in the sense described here.
    679679      </p>
    680       <p id="rfc.section.5.p.14">A cache or origin server receiving a conditional request, other than a full-body GET request, <em class="bcp14">MUST</em> use the strong comparison function to evaluate the condition.
     680      <p id="rfc.section.5.p.14">A cache or origin server receiving a conditional range request (<a href="#Part5" id="rfc.xref.Part5.3"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>) <em class="bcp14">MUST</em> use the strong comparison function to evaluate the condition.
    681681      </p>
    682682      <p id="rfc.section.5.p.15">These rules allow HTTP/1.1 caches and clients to safely perform sub-range retrievals on values that have been obtained from
    … …  
    750750      <h2 id="rfc.section.7.1"><a href="#rfc.section.7.1">7.1</a>&nbsp;<a id="header.etag" href="#header.etag">ETag</a></h2>
    751751      <p id="rfc.section.7.1.p.1">The ETag response-header field provides the current value of the entity tag for the requested variant. The headers used with
    752          entity tags are described in Sections <a href="#header.if-match" id="rfc.xref.header.if-match.2" title="If-Match">7.2</a> and <a href="#header.if-none-match" id="rfc.xref.header.if-none-match.2" title="If-None-Match">7.4</a> of this document, and in <a href="p5-range.html#header.if-range" title="If-Range">Section 6.3</a> of <a href="#Part5" id="rfc.xref.Part5.2"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>. The entity tag <em class="bcp14">MAY</em> be used for comparison with other entities from the same resource (see <a href="#weak.and.strong.validators" title="Weak and Strong Validators">Section&nbsp;5</a>).
     752         entity tags are described in Sections <a href="#header.if-match" id="rfc.xref.header.if-match.2" title="If-Match">7.2</a> and <a href="#header.if-none-match" id="rfc.xref.header.if-none-match.2" title="If-None-Match">7.4</a> of this document, and in <a href="p5-range.html#header.if-range" title="If-Range">Section 6.3</a> of <a href="#Part5" id="rfc.xref.Part5.4"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a>. The entity tag <em class="bcp14">MAY</em> be used for comparison with other entities from the same resource (see <a href="#weak.and.strong.validators" title="Weak and Strong Validators">Section&nbsp;5</a>).
    753753      </p>
    754754      <div id="rfc.figure.u.4"></div><pre class="inline"><span id="rfc.iref.g.4"></span>  <a href="#header.etag" class="smpl">ETag</a> = "ETag" ":" <a href="#entity.tags" class="smpl">entity-tag</a>
    … …  
    825825      <p id="rfc.section.7.3.p.6">The purpose of this feature is to allow efficient updates of cached information with a minimum amount of transaction overhead. </p>
    826826      <dl class="empty">
    827          <dd> <b>Note:</b> The Range request-header field modifies the meaning of If-Modified-Since; see <a href="p5-range.html#header.range" title="Range">Section 6.4</a> of <a href="#Part5" id="rfc.xref.Part5.3"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a> for full details.
     827         <dd> <b>Note:</b> The Range request-header field modifies the meaning of If-Modified-Since; see <a href="p5-range.html#header.range" title="Range">Section 6.4</a> of <a href="#Part5" id="rfc.xref.Part5.5"><cite title="HTTP/1.1, part 5: Range Requests and Partial Responses">[Part5]</cite></a> for full details.
    828828         </dd>
    829829         <dd> <b>Note:</b> If-Modified-Since times are interpreted by the server, whose clock might not be synchronized with the client.
    … …  
    863863         that matched. For all other request methods, the server <em class="bcp14">MUST</em> respond with a status of 412 (Precondition Failed).
    864864      </p>
    865       <p id="rfc.section.7.4.p.5">See <a href="#weak.and.strong.validators" title="Weak and Strong Validators">Section&nbsp;5</a> for rules on how to determine if two entities tags match. The weak comparison function can only be used with GET or HEAD requests.
     865      <p id="rfc.section.7.4.p.5">See <a href="#weak.and.strong.validators" title="Weak and Strong Validators">Section&nbsp;5</a> for rules on how to determine if two entity tags match.
    866866      </p>
    867867      <p id="rfc.section.7.4.p.6">If none of the entity tags match, then the server <em class="bcp14">MAY</em> perform the requested method as if the If-None-Match header field did not exist, but <em class="bcp14">MUST</em> also ignore any If-Modified-Since header field(s) in the request. That is, if no entity tags match, then the server <em class="bcp14">MUST NOT</em> return a 304 (Not Modified) response.
    … …  
    990990      <h1 id="rfc.section.A"><a href="#rfc.section.A">A.</a>&nbsp;<a id="compatibility" href="#compatibility">Compatibility with Previous Versions</a></h1>
    991991      <h2 id="rfc.section.A.1"><a href="#rfc.section.A.1">A.1</a>&nbsp;<a id="changes.from.rfc.2616" href="#changes.from.rfc.2616">Changes from RFC 2616</a></h2>
     992      <p id="rfc.section.A.1.p.1">Allow weak entity tags in all requests except range requests (Sections <a href="#weak.and.strong.validators" title="Weak and Strong Validators">5</a> and <a href="#header.if-none-match" id="rfc.xref.header.if-none-match.3" title="If-None-Match">7.4</a>).
     993      </p>
    992994      <h1 id="rfc.section.B"><a href="#rfc.section.B">B.</a>&nbsp;Change Log (to be removed by RFC Editor before publication)
    993995      </h1>
    … …  
    10161018      <h2 id="rfc.section.B.4"><a href="#rfc.section.B.4">B.4</a>&nbsp;Since draft-ietf-httpbis-p4-conditional-02
    10171019      </h2>
     1020      <p id="rfc.section.B.4.p.1">Closed issues: </p>
     1021      <ul>
     1022         <li> &lt;<a href="http://www3.tools.ietf.org/wg/httpbis/trac/ticket/116">http://www3.tools.ietf.org/wg/httpbis/trac/ticket/116</a>&gt;: "Weak ETags on non-GET requests"
     1023         </li>
     1024      </ul>
    10181025      <h1><a id="rfc.copyright" href="#rfc.copyright">Full Copyright Statement</a></h1>
    10191026      <p>This document is subject to the rights, licenses and restrictions contained in BCP 78, and except as set forth therein, the
    … …  
    10791086                        <li class="indline1">If-Match&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-match.2">7.1</a>, <a class="iref" href="#rfc.iref.h.2"><b>7.2</b></a></li>
    10801087                        <li class="indline1">If-Modified-Since&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.3"><b>7.3</b></a></li>
    1081                         <li class="indline1">If-None-Match&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-none-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-none-match.2">7.1</a>, <a class="iref" href="#rfc.iref.h.4"><b>7.4</b></a></li>
     1088                        <li class="indline1">If-None-Match&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-none-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-none-match.2">7.1</a>, <a class="iref" href="#rfc.iref.h.4"><b>7.4</b></a>, <a class="iref" href="#rfc.xref.header.if-none-match.3">A.1</a></li>
    10821089                        <li class="indline1">If-Unmodified-Since&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.5"><b>7.5</b></a></li>
    10831090                        <li class="indline1">Last-Modified&nbsp;&nbsp;<a class="iref" href="#rfc.iref.h.6"><b>7.6</b></a></li>
    … …  
    10891096                  <li class="indline1">If-Match header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-match.2">7.1</a>, <a class="iref" href="#rfc.iref.i.1"><b>7.2</b></a></li>
    10901097                  <li class="indline1">If-Modified-Since header&nbsp;&nbsp;<a class="iref" href="#rfc.iref.i.2"><b>7.3</b></a></li>
    1091                   <li class="indline1">If-None-Match header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-none-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-none-match.2">7.1</a>, <a class="iref" href="#rfc.iref.i.3"><b>7.4</b></a></li>
     1098                  <li class="indline1">If-None-Match header&nbsp;&nbsp;<a class="iref" href="#rfc.xref.header.if-none-match.1">3</a>, <a class="iref" href="#rfc.xref.header.if-none-match.2">7.1</a>, <a class="iref" href="#rfc.iref.i.3"><b>7.4</b></a>, <a class="iref" href="#rfc.xref.header.if-none-match.3">A.1</a></li>
    10921099                  <li class="indline1">If-Unmodified-Since header&nbsp;&nbsp;<a class="iref" href="#rfc.iref.i.4"><b>7.5</b></a></li>
    10931100               </ul>
    … …  
    11051112                     </ul>
    11061113                  </li>
    1107                   <li class="indline1"><em>Part5</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.1">3</a>, <a class="iref" href="#rfc.xref.Part5.2">7.1</a>, <a class="iref" href="#rfc.xref.Part5.3">7.3</a>, <a class="iref" href="#Part5"><b>11.1</b></a><ul class="ind">
    1108                         <li class="indline1"><em>Section 6.3</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.1">3</a>, <a class="iref" href="#rfc.xref.Part5.2">7.1</a></li>
    1109                         <li class="indline1"><em>Section 6.4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.3">7.3</a></li>
     1114                  <li class="indline1"><em>Part5</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.1">3</a>, <a class="iref" href="#rfc.xref.Part5.2">5</a>, <a class="iref" href="#rfc.xref.Part5.3">5</a>, <a class="iref" href="#rfc.xref.Part5.4">7.1</a>, <a class="iref" href="#rfc.xref.Part5.5">7.3</a>, <a class="iref" href="#Part5"><b>11.1</b></a><ul class="ind">
     1115                        <li class="indline1"><em>Section 6.3</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.1">3</a>, <a class="iref" href="#rfc.xref.Part5.4">7.1</a></li>
     1116                        <li class="indline1"><em>Section 6.4</em>&nbsp;&nbsp;<a class="iref" href="#rfc.xref.Part5.5">7.3</a></li>
    11101117                     </ul>
    11111118                  </li>

  • draft-ietf-httpbis/latest/p4-conditional.xml

    r244 r245  
    425425</t>
    426426<t>
    427    Clients &MAY; issue simple (non-subrange) GET requests with either weak
    428    validators or strong validators. Clients &MUST-NOT; use weak validators
    429    in other forms of request.
     427   Clients &MUST-NOT; use weak validators in range requests (<xref target="Part5"/>).
    430428</t>
    431429<t>
    … …  
    501499</t>
    502500<t>
    503    A cache or origin server receiving a conditional request, other than
    504    a full-body GET request, &MUST; use the strong comparison function to
     501   A cache or origin server receiving a conditional range request
     502   (<xref target="Part5"/>) &MUST; use the strong comparison function to
    505503   evaluate the condition.
    506504</t>
    … …  
    852850</t>
    853851<t>
    854    See <xref target="weak.and.strong.validators"/> for rules on how to determine if two entities tags
    855    match. The weak comparison function can only be used with GET or HEAD
    856    requests.
     852   See <xref target="weak.and.strong.validators"/> for rules on how to
     853   determine if two entity tags match.
    857854</t>
    858855<t>
    … …  
    12281225
    12291226<section title="Changes from RFC 2616" anchor="changes.from.rfc.2616">
     1227<t>
     1228  Allow weak entity tags in all requests except range requests (Sections
     1229  <xref target="weak.and.strong.validators" format="counter"/> and
     1230  <xref target="header.if-none-match" format="counter"/>).
     1231</t>
    12301232</section>
    12311233
    … …  
    12731275<section title="Since draft-ietf-httpbis-p4-conditional-02">
    12741276<t>
     1277  Closed issues:
     1278  <list style="symbols">
     1279    <t>
     1280      <eref target="http://www3.tools.ietf.org/wg/httpbis/trac/ticket/116"/>:
     1281      "Weak ETags on non-GET requests"
     1282    </t>
     1283  </list>
    12751284</t>
    12761285</section>
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