Changeset 2579 for draft-ietf-httpbis/latest/p2-semantics.html
- Timestamp:
- 24/01/14 10:19:57 (9 years ago)
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draft-ietf-httpbis/latest/p2-semantics.html
r2578 r2579 1278 1278 the user agent's preferences is better than sending a <a href="#status.406" class="smpl">406 (Not Acceptable)</a> response. 1279 1279 </p> 1280 <p id="rfc.section.3.4.1.p.5">An origin server <em class="bcp14">MAY</em> generate a <a href="#header.vary" class="smpl">Vary</a> header field (<a href="#header.vary" id="rfc.xref.header.vary.1" title="Vary">Section 7.1.4</a>) in a response if it wishes to indicate what fields of request information were used in its selection algorithm. This informs 1281 recipients that sending more information might be useful in future requests. It also warns caches not to reuse that response, 1282 until reconfirmed by the origin server, for a request that contains different information in those fields. 1280 <p id="rfc.section.3.4.1.p.5">A <a href="#header.vary" class="smpl">Vary</a> header field (<a href="#header.vary" id="rfc.xref.header.vary.1" title="Vary">Section 7.1.4</a>) is often sent in a response subject to proactive negotiation to indicate what parts of the request information were used 1281 in the selection algorithm. 1283 1282 </p> 1284 1283 </div>
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