Changeset 2111 for draft-ietf-httpbis/latest/p2-semantics.xml
- Timestamp:
- 11/01/13 08:39:05 (10 years ago)
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- 1 edited
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draft-ietf-httpbis/latest/p2-semantics.xml
r2110 r2111 1443 1443 </t> 1444 1444 <t> 1445 An origin server &MUST-NOT; send a validator header field 1446 (<xref target="response.validator"/>), such as an <x:ref>ETag</x:ref> or 1447 <x:ref>Last-Modified</x:ref> field, in a successful response to PUT unless 1448 the request's representation data was saved without any transformation 1449 applied to the body (i.e., the resource's new representation data is 1450 identical to the representation data received in the PUT request) and the 1451 validator field value reflects the new representation. 1452 This requirement allows a user agent to know when the representation body 1453 it has in memory remains current as a result of the PUT, thus not in need 1454 of retrieving again from the origin server, and that the new validator(s) 1455 received in the response can be used for future conditional requests in 1456 order to prevent accidental overwrites. 1457 </t> 1458 <t> 1445 1459 The fundamental difference between the POST and PUT methods is 1446 1460 highlighted by the different intent for the enclosed representation.
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