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

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Fielding, et al. Standards Track [Page 163]RFC 2616 HTTP/1.1 June 199919 Appendices19.1 Internet Media Type message/http and application/httpIn addition to defining the HTTP/1.1 protocol, this document servesas the specification for the Internet media type "message/http" and"application/http". The message/http type can be used to enclose asingle HTTP request or response message, provided that it obeys theMIME restrictions for all "message" types regarding line length andencodings. The application/http type can be used to enclose apipeline of one or more HTTP request or response messages (notintermixed). The following is to be registered with IANA [17].Media Type name: messageMedia subtype name: httpRequired parameters: noneOptional parameters: version, msgtypeversion: The HTTP-Version number of the enclosed message(e.g., "1.1"). If not present, the version can bedetermined from the first line of the body.msgtype: The message type -- "request" or "response". If notpresent, the type can be determined from the firstline of the body.Encoding considerations: only "7bit", "8bit", or "binary" arepermittedSecurity considerations: noneMedia Type name: applicationMedia subtype name: httpRequired parameters: noneOptional parameters: version, msgtypeversion: The HTTP-Version number of the enclosed messages(e.g., "1.1"). If not present, the version can bedetermined from the first line of the body.msgtype: The message type -- "request" or "response". If notpresent, the type can be determined from the firstline of the body.Encoding considerations: HTTP messages enclosed by this typeare in "binary" format; use of an appropriateContent-Transfer-Encoding is required whentransmitted via E-mail.Security considerations: none
Fielding, et al. Standards Track [Page 164]RFC 2616 HTTP/1.1 June 199919.2 Internet Media Type multipart/byterangesWhen an HTTP 206 (Partial Content) response message includes thecontent of multiple ranges (a response to a request for multiplenon-overlapping ranges), these are transmitted as a multipartmessage-body. The media type for this purpose is called"multipart/byteranges".The multipart/byteranges media type includes two or more parts, eachwith its own Content-Type and Content-Range fields. The requiredboundary parameter specifies the boundary string used to separateeach body-part.Media Type name: multipartMedia subtype name: byterangesRequired parameters: boundaryOptional parameters: noneEncoding considerations: only "7bit", "8bit", or "binary" arepermittedSecurity considerations: noneFor example:HTTP/1.1 206 Partial ContentDate: Wed, 15 Nov 1995 06:25:24 GMTLast-Modified: Wed, 15 Nov 1995 04:58:08 GMTContent-type: multipart/byteranges; boundary=THIS_STRING_SEPARATES--THIS_STRING_SEPARATESContent-type: application/pdfContent-range: bytes 500-999/8000...the first range...--THIS_STRING_SEPARATESContent-type: application/pdfContent-range: bytes 7000-7999/8000...the second range--THIS_STRING_SEPARATES--
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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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understand.For example, consider a
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Page 132 and 133: 14.14 Content-LocationThe Content-L
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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 160 and 161: a cache cannot determine from the r
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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 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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