Network Working Group R. Fielding Request for Comments: 2616 ...

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University of California, IrvineIrvine, CA 92697-3425, USAFax: +1 (949) 824-1715EMail: fielding@ics.uci.eduJames GettysWorld Wide Web ConsortiumMIT Laboratory for Computer Science545 Technology SquareCambridge, MA 02139, USAFax: +1 (617) 258 8682EMail: jg@w3.orgJeffrey C. MogulWestern Research LaboratoryCompaq Computer Corporation250 University AvenuePalo Alto, California, 94305, USAEMail: mogul@wrl.dec.comHenrik Frystyk NielsenWorld Wide Web ConsortiumMIT Laboratory for Computer Science545 Technology SquareCambridge, MA 02139, USAFax: +1 (617) 258 8682EMail: frystyk@w3.orgLarry MasinterXerox Corporation3333 Coyote Hill RoadPalo Alto, CA 94034, USAEMail: masinter@parc.xerox.comFielding, et al. Standards Track [Page 162]RFC 2616 HTTP/1.1 June 1999
Paul J. LeachMicrosoft Corporation1 Microsoft WayRedmond, WA 98052, USAEMail: paulle@microsoft.comTim Berners-LeeDirector, World Wide Web ConsortiumMIT Laboratory for Computer Science545 Technology SquareCambridge, MA 02139, USAFax: +1 (617) 258 8682EMail: timbl@w3.org
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eferred to as "HTTP/1.1", and is an
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12.1 Server-driven Negotiation ....
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14.40 Trailer .....................
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1.2 RequirementsThe key words "MUST
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Fielding, et al. Standards Track [P
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equest chain ----------------------
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Elements separated by a bar ("|") a
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HTTP/1.1 header field values can be
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An application that sends a request
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3.2.3 URI ComparisonWhen comparing
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is not desirable and is discouraged
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CRLFchunk = chunk-size [ chunk-exte
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When in canonical form, media subty
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3.9 Quality ValuesHTTP content nego
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RFC 2616 HTTP/1.1 June 1999HTTP/1.1
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message-body = entity-body| Transfe
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in advance.Messages MUST NOT includ
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equested resource, and 501 (Not Imp
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names) MUST use the following rules
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values for the first digit:- 1xx: I
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how the transfer-length of a messag
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connection-token close.If either th
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idempotent (see section 9.1.2). Non
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compatibility with RFC 2068, a serv
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If at any point an error status is
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optional features implemented by th
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- Extending a database through an a
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intervention (or other means) on th
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10.1.2 101 Switching ProtocolsThe s
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esponse MAY include new or updated
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The response MUST include the follo
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If the client is sending data, a se
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If the response could be unacceptab
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10.4.15 414 Request-URI Too LongThe
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10.5.5 504 Gateway TimeoutThe serve
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Caching would be useless if it did
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Warning (but without removing any e
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If the user has overridden the basi
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in the past. This means that the re
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RFC 2616 HTTP/1.1 June 1999the time
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simple:response_is_fresh = (freshne
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match.In HTTP/1.1, a conditional re
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validators or strong validators. Cl
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- MAY send a weak entity tag instea
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Unless specifically constrained by
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warn-code 1xx, which are deleted ev
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for the associated entity, its enti
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- DELETE- POSTIn order to prevent d
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The Accept request-header field can
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image/jpeg = 0.5text/html;level=2 =
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Note: If the request does not inclu
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Accept-Ranges: bytesbut are not req
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containing an Authorization field,
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- Restrictions on what may be store
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improve privacy in some cases, we c
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must-revalidateBecause a cache MAY
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Page 132 and 133: 14.14 Content-LocationThe Content-L
Page 134 and 135: Note: while the definition of Conte
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Page 138 and 139: Some origin server implementations
Page 140 and 141: Expires = "Expires" ":" HTTP-dateAn
Page 142 and 143: A client MUST include a Host header
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Page 146 and 147: RFC 2616 HTTP/1.1 June 1999If none
Page 148 and 149: 14.29 Last-ModifiedThe Last-Modifie
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Page 154 and 155: Content) instead of 200 (OK).- The
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Page 172 and 173: The HTTP protocol has evolved consi
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Page 182 and 183: Notes:1) Additional CRLFs may prece
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Page 188 and 189: - understand any valid response in
Page 190 and 191: CREATE had a race that required an
Page 192 and 193: also needed to be a general header,
Page 194: Fielding, et al. Standards Track [P
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