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Changeset 1471


Ignore:
Timestamp:
2011-11-05 02:52:25 (3 years ago)
Author:
julian.reschke@gmx.de
Message:

Add a note about non-final responses to Client/Server? Messaging introduction (see #300)

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

Legend:

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  • draft-ietf-httpbis/latest/p1-messaging.html

    r1469 r1471  
    359359  }  
    360360  @bottom-center { 
    361        content: "Expires May 4, 2012";  
     361       content: "Expires May 8, 2012";  
    362362  }  
    363363  @bottom-right { 
     
    408408      <meta name="dct.creator" content="Reschke, J. F."> 
    409409      <meta name="dct.identifier" content="urn:ietf:id:draft-ietf-httpbis-p1-messaging-latest"> 
    410       <meta name="dct.issued" scheme="ISO8601" content="2011-11-01"> 
     410      <meta name="dct.issued" scheme="ISO8601" content="2011-11-05"> 
    411411      <meta name="dct.replaces" content="urn:ietf:rfc:2145"> 
    412412      <meta name="dct.replaces" content="urn:ietf:rfc:2616"> 
     
    440440            </tr> 
    441441            <tr> 
    442                <td class="left">Expires: May 4, 2012</td> 
     442               <td class="left">Expires: May 8, 2012</td> 
    443443               <td class="right">HP</td> 
    444444            </tr> 
     
    493493            <tr> 
    494494               <td class="left"></td> 
    495                <td class="right">November 1, 2011</td> 
     495               <td class="right">November 5, 2011</td> 
    496496            </tr> 
    497497         </tbody> 
     
    526526         in progress”. 
    527527      </p> 
    528       <p>This Internet-Draft will expire on May 4, 2012.</p> 
     528      <p>This Internet-Draft will expire on May 8, 2012.</p> 
    529529      <h1><a id="rfc.copyrightnotice" href="#rfc.copyrightnotice">Copyright Notice</a></h1> 
    530530      <p>Copyright © 2011 IETF Trust and the persons identified as the document authors. All rights reserved.</p> 
     
    893893         (<a href="#status.line" title="Response Status-Line">Section&nbsp;3.1.2</a>), followed by MIME-like header fields containing server information, resource metadata, and payload metadata (<a href="#header.fields" title="Header Fields">Section&nbsp;3.2</a>), an empty line to indicate the end of the header section, and finally a message body containing the payload body (if any, <a href="#message.body" title="Message Body">Section&nbsp;3.3</a>). 
    894894      </p> 
    895       <p id="rfc.section.2.1.p.7">The following example illustrates a typical message exchange for a GET request on the URI "http://www.example.com/hello.txt":</p> 
     895      <p id="rfc.section.2.1.p.7">Note that 1xx responses (<a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 7.1</a> of <a href="#Part2" id="rfc.xref.Part2.1"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) are not final; therefore, a server can send zero or more 1xx responses, followed by exactly one final response (with any 
     896         other status code). 
     897      </p> 
     898      <p id="rfc.section.2.1.p.8">The following example illustrates a typical message exchange for a GET request on the URI "http://www.example.com/hello.txt":</p> 
    896899      <div id="rfc.figure.u.10"></div> 
    897900      <p>client request:</p><pre class="text2">GET /hello.txt HTTP/1.1 
     
    968971         or an intranet-to-Internet privacy filter. Such transformations are presumed to be desired by the client (or client organization) 
    969972         that selected the proxy and are beyond the scope of this specification. However, when a proxy is not intended to transform 
    970          a given message, we use the term "<dfn>non-transforming proxy</dfn>" to target requirements that preserve HTTP message semantics. See <a href="p2-semantics.html#status.203" title="203 Non-Authoritative Information">Section 7.2.4</a> of <a href="#Part2" id="rfc.xref.Part2.1"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> and <a href="p6-cache.html#header.warning" title="Warning">Section 3.6</a> of <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a> for status and warning codes related to transformations. 
     973         a given message, we use the term "<dfn>non-transforming proxy</dfn>" to target requirements that preserve HTTP message semantics. See <a href="p2-semantics.html#status.203" title="203 Non-Authoritative Information">Section 7.2.4</a> of <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> and <a href="p6-cache.html#header.warning" title="Warning">Section 3.6</a> of <a href="#Part6" id="rfc.xref.Part6.1"><cite title="HTTP/1.1, part 6: Caching">[Part6]</cite></a> for status and warning codes related to transformations. 
    971974      </p> 
    972975      <p id="rfc.section.2.4.p.7"><span id="rfc.iref.g.16"></span><span id="rfc.iref.r.4"></span>  <span id="rfc.iref.a.1"></span> A "<dfn>gateway</dfn>" (a.k.a., "<dfn>reverse proxy</dfn>") is a receiving agent that acts as a layer above some other server(s) and translates the received requests to the underlying 
     
    11171120      </p> 
    11181121      <p id="rfc.section.2.7.1.p.6">When an "http" URI is used within a context that calls for access to the indicated resource, a client <em class="bcp14">MAY</em> attempt access by resolving the host to an IP address, establishing a TCP connection to that address on the indicated port, 
    1119          and sending an HTTP request message (<a href="#http.message" title="Message Format">Section&nbsp;3</a>) containing the URI's identifying data (<a href="#message.routing" title="Message Routing">Section&nbsp;4</a>) to the server. If the server responds to that request with a non-interim HTTP response message, as described in <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.2"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, then that response is considered an authoritative answer to the client's request. 
     1122         and sending an HTTP request message (<a href="#http.message" title="Message Format">Section&nbsp;3</a>) containing the URI's identifying data (<a href="#message.routing" title="Message Routing">Section&nbsp;4</a>) to the server. If the server responds to that request with a non-interim HTTP response message, as described in <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>, then that response is considered an authoritative answer to the client's request. 
    11201123      </p> 
    11211124      <p id="rfc.section.2.7.1.p.7">Although HTTP is independent of the transport protocol, the "http" scheme is specific to TCP-based services because the name 
     
    12071210      <p id="rfc.section.3.1.1.1.p.1">The Method token indicates the request method to be performed on the target resource. The request method is case-sensitive.</p> 
    12081211      <div id="rfc.figure.u.22"></div><pre class="inline"><span id="rfc.iref.g.31"></span>  <a href="#method" class="smpl">Method</a>         = <a href="#rule.token.separators" class="smpl">token</a> 
    1209 </pre><p id="rfc.section.3.1.1.1.p.3">See <a href="p2-semantics.html#method" title="Method">Section 2</a> of <a href="#Part2" id="rfc.xref.Part2.3"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of methods defined by this specification, the IANA registry, and considerations 
     1212</pre><p id="rfc.section.3.1.1.1.p.3">See <a href="p2-semantics.html#method" title="Method">Section 2</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of methods defined by this specification, the IANA registry, and considerations 
    12101213         for new methods. 
    12111214      </p> 
     
    12191222                 / <a href="#uri" class="smpl">authority</a> 
    12201223</pre><p id="rfc.section.3.1.1.2.p.3">HTTP does not place a pre-defined limit on the length of a request-target. A server <em class="bcp14">MUST</em> be prepared to receive URIs of unbounded length and respond with the 414 (URI Too Long) status code if the received request-target 
    1221          would be longer than the server wishes to handle (see <a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 7.4.15</a> of <a href="#Part2" id="rfc.xref.Part2.4"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
     1224         would be longer than the server wishes to handle (see <a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 7.4.15</a> of <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
    12221225      </p> 
    12231226      <p id="rfc.section.3.1.1.2.p.4">Various ad-hoc limitations on request-target length are found in practice. It is <em class="bcp14">RECOMMENDED</em> that all HTTP senders and recipients support request-target lengths of 8000 or more octets. 
     
    12331236      <div id="rfc.figure.u.24"></div><pre class="inline"><span id="rfc.iref.g.33"></span>  <a href="#status.line" class="smpl">Status-Line</a> = <a href="#http.version" class="smpl">HTTP-Version</a> <a href="#core.rules" class="smpl">SP</a> <a href="#status.code" class="smpl">Status-Code</a> <a href="#core.rules" class="smpl">SP</a> <a href="#reason.phrase" class="smpl">Reason-Phrase</a> <a href="#core.rules" class="smpl">CRLF</a> 
    12341237</pre><h4 id="rfc.section.3.1.2.1"><a href="#rfc.section.3.1.2.1">3.1.2.1</a>&nbsp;<a id="status.code" href="#status.code">Status Code</a></h4> 
    1235       <p id="rfc.section.3.1.2.1.p.1">The Status-Code element is a 3-digit integer result code of the attempt to understand and satisfy the request. See <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.5"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of status codes defined by this specification, the IANA registry, and considerations 
     1238      <p id="rfc.section.3.1.2.1.p.1">The Status-Code element is a 3-digit integer result code of the attempt to understand and satisfy the request. See <a href="p2-semantics.html#status.code.and.reason.phrase" title="Status Code and Reason Phrase">Section 4</a> of <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> for further information, such as the list of status codes defined by this specification, the IANA registry, and considerations 
    12361239         for new status codes. 
    12371240      </p> 
     
    12521255  <a href="#header.fields" class="smpl">field-content</a>  = *( <a href="#core.rules" class="smpl">HTAB</a> / <a href="#core.rules" class="smpl">SP</a> / <a href="#core.rules" class="smpl">VCHAR</a> / <a href="#rule.quoted-string" class="smpl">obs-text</a> ) 
    12531256</pre><p id="rfc.section.3.2.p.3">The field-name token labels the corresponding field-value as having the semantics defined by that header field. For example, 
    1254          the Date header field is defined in <a href="p2-semantics.html#header.date" title="Date">Section 9.2</a> of <a href="#Part2" id="rfc.xref.Part2.6"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> as containing the origination timestamp for the message in which it appears. 
     1257         the Date header field is defined in <a href="p2-semantics.html#header.date" title="Date">Section 9.2</a> of <a href="#Part2" id="rfc.xref.Part2.7"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a> as containing the origination timestamp for the message in which it appears. 
    12551258      </p> 
    12561259      <p id="rfc.section.3.2.p.4">HTTP header fields are fully extensible: there is no limit on the introduction of new field names, each presumably defining 
     
    12601263         them. 
    12611264      </p> 
    1262       <p id="rfc.section.3.2.p.5">New HTTP header fields <em class="bcp14">SHOULD</em> be registered with IANA according to the procedures in <a href="p2-semantics.html#considerations.for.creating.header.fields" title="Considerations for Creating Header Fields">Section 3.1</a> of <a href="#Part2" id="rfc.xref.Part2.7"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>. Unrecognized header fields <em class="bcp14">MUST</em> be forwarded by a proxy unless the field-name is listed in the Connection header field (<a href="#header.connection" id="rfc.xref.header.connection.3" title="Connection">Section&nbsp;8.1</a>) or the proxy is specifically configured to block or otherwise transform such fields. Unrecognized header fields <em class="bcp14">SHOULD</em> be ignored by other recipients. 
     1265      <p id="rfc.section.3.2.p.5">New HTTP header fields <em class="bcp14">SHOULD</em> be registered with IANA according to the procedures in <a href="p2-semantics.html#considerations.for.creating.header.fields" title="Considerations for Creating Header Fields">Section 3.1</a> of <a href="#Part2" id="rfc.xref.Part2.8"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>. Unrecognized header fields <em class="bcp14">MUST</em> be forwarded by a proxy unless the field-name is listed in the Connection header field (<a href="#header.connection" id="rfc.xref.header.connection.3" title="Connection">Section&nbsp;8.1</a>) or the proxy is specifically configured to block or otherwise transform such fields. Unrecognized header fields <em class="bcp14">SHOULD</em> be ignored by other recipients. 
    12631266      </p> 
    12641267      <p id="rfc.section.3.2.p.6">The order in which header fields with differing field names are received is not significant. However, it is "good practice" 
     
    14851488      <p id="rfc.section.4.1.p.7">If a proxy receives a host name that is not a fully qualified domain name, it <em class="bcp14">MAY</em> add its domain to the host name it received. If a proxy receives a fully qualified domain name, the proxy <em class="bcp14">MUST NOT</em> change the host name. 
    14861489      </p> 
    1487       <p id="rfc.section.4.1.p.8"><span id="rfc.iref.a.4"></span> The "authority form" is only used by the CONNECT request method (<a href="p2-semantics.html#CONNECT" title="CONNECT">Section 6.9</a> of <a href="#Part2" id="rfc.xref.Part2.8"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
     1490      <p id="rfc.section.4.1.p.8"><span id="rfc.iref.a.4"></span> The "authority form" is only used by the CONNECT request method (<a href="p2-semantics.html#CONNECT" title="CONNECT">Section 6.9</a> of <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
    14881491      </p> 
    14891492      <p id="rfc.section.4.1.p.9"><span id="rfc.iref.o.3"></span> The most common form of request-target is that used when making a request to an origin server ("origin form"). In this case, 
     
    17971800      <p id="rfc.section.6.1.2.2.p.2">Clients which assume persistent connections and pipeline immediately after connection establishment <em class="bcp14">SHOULD</em> be prepared to retry their connection if the first pipelined attempt fails. If a client does such a retry, it <em class="bcp14">MUST NOT</em> pipeline before it knows the connection is persistent. Clients <em class="bcp14">MUST</em> also be prepared to resend their requests if the server closes the connection before sending all of the corresponding responses. 
    17981801      </p> 
    1799       <p id="rfc.section.6.1.2.2.p.3">Clients <em class="bcp14">SHOULD NOT</em> pipeline requests using non-idempotent request methods or non-idempotent sequences of request methods (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 6.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.9"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Otherwise, a premature termination of the transport connection could lead to indeterminate results. A client wishing to 
     1802      <p id="rfc.section.6.1.2.2.p.3">Clients <em class="bcp14">SHOULD NOT</em> pipeline requests using non-idempotent request methods or non-idempotent sequences of request methods (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 6.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.10"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Otherwise, a premature termination of the transport connection could lead to indeterminate results. A client wishing to 
    18001803         send a non-idempotent request <em class="bcp14">SHOULD</em> wait to send that request until it has received the response status line for the previous request. 
    18011804      </p> 
     
    18961899      <h3 id="rfc.section.6.1.5"><a href="#rfc.section.6.1.5">6.1.5</a>&nbsp;<a id="persistent.retrying.requests" href="#persistent.retrying.requests">Retrying Requests</a></h3> 
    18971900      <p id="rfc.section.6.1.5.p.1">Senders can close the transport connection at any time. Therefore, clients, servers, and proxies <em class="bcp14">MUST</em> be able to recover from asynchronous close events. Client software <em class="bcp14">MAY</em> reopen the transport connection and retransmit the aborted sequence of requests without user interaction so long as the request 
    1898          sequence is idempotent (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 6.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.10"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Non-idempotent request methods or sequences <em class="bcp14">MUST NOT</em> be automatically retried, although user agents <em class="bcp14">MAY</em> offer a human operator the choice of retrying the request(s). Confirmation by user-agent software with semantic understanding 
     1901         sequence is idempotent (see <a href="p2-semantics.html#idempotent.methods" title="Idempotent Methods">Section 6.1.2</a> of <a href="#Part2" id="rfc.xref.Part2.11"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). Non-idempotent request methods or sequences <em class="bcp14">MUST NOT</em> be automatically retried, although user agents <em class="bcp14">MAY</em> offer a human operator the choice of retrying the request(s). Confirmation by user-agent software with semantic understanding 
    18991902         of the application <em class="bcp14">MAY</em> substitute for user confirmation. The automatic retry <em class="bcp14">SHOULD NOT</em> be repeated if the second sequence of requests fails. 
    19001903      </p> 
     
    19091912      </p> 
    19101913      <h3 id="rfc.section.6.2.3"><a href="#rfc.section.6.2.3">6.2.3</a>&nbsp;<a id="use.of.the.100.status" href="#use.of.the.100.status">Use of the 100 (Continue) Status</a></h3> 
    1911       <p id="rfc.section.6.2.3.p.1">The purpose of the 100 (Continue) status code (see <a href="p2-semantics.html#status.100" title="100 Continue">Section 7.1.1</a> of <a href="#Part2" id="rfc.xref.Part2.11"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) is to allow a client that is sending a request message with a request body to determine if the origin server is willing 
     1914      <p id="rfc.section.6.2.3.p.1">The purpose of the 100 (Continue) status code (see <a href="p2-semantics.html#status.100" title="100 Continue">Section 7.1.1</a> of <a href="#Part2" id="rfc.xref.Part2.12"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) is to allow a client that is sending a request message with a request body to determine if the origin server is willing 
    19121915         to accept the request (based on the request header fields) before the client sends the request body. In some cases, it might 
    19131916         either be inappropriate or highly inefficient for the client to send the body if the server will reject the message without 
     
    19161919      <p id="rfc.section.6.2.3.p.2">Requirements for HTTP/1.1 clients: </p> 
    19171920      <ul> 
    1918          <li>If a client will wait for a 100 (Continue) response before sending the request body, it <em class="bcp14">MUST</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.12"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation. 
    1919          </li> 
    1920          <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.13"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation if it does not intend to send a request body. 
     1921         <li>If a client will wait for a 100 (Continue) response before sending the request body, it <em class="bcp14">MUST</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.13"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation. 
     1922         </li> 
     1923         <li>A client <em class="bcp14">MUST NOT</em> send an Expect header field (<a href="p2-semantics.html#header.expect" title="Expect">Section 9.3</a> of <a href="#Part2" id="rfc.xref.Part2.14"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) with the "100-continue" expectation if it does not intend to send a request body. 
    19211924         </li> 
    19221925      </ul> 
     
    19621965         <li>A proxy <em class="bcp14">MUST NOT</em> forward a 100 (Continue) response if the request message was received from an HTTP/1.0 (or earlier) client and did not include 
    19631966            an Expect header field with the "100-continue" expectation. This requirement overrides the general rule for forwarding of 
    1964             1xx responses (see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 7.1</a> of <a href="#Part2" id="rfc.xref.Part2.14"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
     1967            1xx responses (see <a href="p2-semantics.html#status.1xx" title="Informational 1xx">Section 7.1</a> of <a href="#Part2" id="rfc.xref.Part2.15"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
    19651968         </li> 
    19661969      </ul> 
     
    22222225      </p> 
    22232226      <p id="rfc.section.8.7.p.8">The Upgrade header field cannot be used to indicate a switch to a protocol on a different connection. For that purpose, it 
    2224          is more appropriate to use a 3xx redirection response (<a href="p2-semantics.html#status.3xx" title="Redirection 3xx">Section 7.3</a> of <a href="#Part2" id="rfc.xref.Part2.15"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
     2227         is more appropriate to use a 3xx redirection response (<a href="p2-semantics.html#status.3xx" title="Redirection 3xx">Section 7.3</a> of <a href="#Part2" id="rfc.xref.Part2.16"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
    22252228      </p> 
    22262229      <p id="rfc.section.8.7.p.9">Servers <em class="bcp14">MUST</em> include the "Upgrade" header field in 101 (Switching Protocols) responses to indicate which protocol(s) are being switched 
     
    26432646         that most implementations will choose substantially higher limits. 
    26442647      </p> 
    2645       <p id="rfc.section.10.6.p.3">This specification also provides a way for servers to reject messages that have request-targets that are too long (<a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 7.4.15</a> of <a href="#Part2" id="rfc.xref.Part2.16"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) or request entities that are too large (<a href="p2-semantics.html#status.4xx" title="Client Error 4xx">Section 7.4</a> of <a href="#Part2" id="rfc.xref.Part2.17"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
     2648      <p id="rfc.section.10.6.p.3">This specification also provides a way for servers to reject messages that have request-targets that are too long (<a href="p2-semantics.html#status.414" title="414 URI Too Long">Section 7.4.15</a> of <a href="#Part2" id="rfc.xref.Part2.17"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>) or request entities that are too large (<a href="p2-semantics.html#status.4xx" title="Client Error 4xx">Section 7.4</a> of <a href="#Part2" id="rfc.xref.Part2.18"><cite title="HTTP/1.1, part 2: Message Semantics">[Part2]</cite></a>). 
    26462649      </p> 
    26472650      <p id="rfc.section.10.6.p.4">Other fields (including but not limited to request methods, response status phrases, header field-names, and body chunks) <em class="bcp14">SHOULD</em> be limited by implementations carefully, so as to not impede interoperability. 
     
    34733476      </ul> 
    34743477      <h2 id="rfc.section.C.19"><a href="#rfc.section.C.19">C.19</a>&nbsp;<a id="changes.since.17" href="#changes.since.17">Since draft-ietf-httpbis-p1-messaging-17</a></h2> 
    3475       <p id="rfc.section.C.19.p.1">No changes yet.</p> 
     3478      <p id="rfc.section.C.19.p.1">Closed issues: </p> 
     3479      <ul> 
     3480         <li> &lt;<a href="http://tools.ietf.org/wg/httpbis/trac/ticket/300">http://tools.ietf.org/wg/httpbis/trac/ticket/300</a>&gt;: "Define non-final responses" 
     3481         </li> 
     3482      </ul> 
    34763483      <h1 id="rfc.index"><a href="#rfc.index">Index</a></h1> 
    34773484      <p class="noprint"><a href="#rfc.index.A">A</a> <a href="#rfc.index.B">B</a> <a href="#rfc.index.C">C</a> <a href="#rfc.index.D">D</a> <a href="#rfc.index.E">E</a> <a href="#rfc.index.G">G</a> <a href="#rfc.index.H">H</a> <a href="#rfc.index.I">I</a> <a href="#rfc.index.K">K</a> <a href="#rfc.index.M">M</a> <a href="#rfc.index.N">N</a> <a href="#rfc.index.O">O</a> <a href="#rfc.index.P">P</a> <a href="#rfc.index.R">R</a> <a href="#rfc.index.S">S</a> <a href="#rfc.index.T">T</a> <a href="#rfc.index.U">U</a> <a href="#rfc.index.V">V</a>  
     
    36743681            <li><a id="rfc.index.P" href="#rfc.index.P"><b>P</b></a><ul> 
    36753682                  <li><em>Pad1995</em>&nbsp;&nbsp;<a href="#rfc.xref.Pad1995.1">6.1.1</a>, <a href="#Pad1995"><b>12.2</b></a></li> 
    3676                   <li><em>Part2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">2.4</a>, <a href="#rfc.xref.Part2.2">2.7.1</a>, <a href="#rfc.xref.Part2.3">3.1.1.1</a>, <a href="#rfc.xref.Part2.4">3.1.1.2</a>, <a href="#rfc.xref.Part2.5">3.1.2.1</a>, <a href="#rfc.xref.Part2.6">3.2</a>, <a href="#rfc.xref.Part2.7">3.2</a>, <a href="#rfc.xref.Part2.8">4.1</a>, <a href="#rfc.xref.Part2.9">6.1.2.2</a>, <a href="#rfc.xref.Part2.10">6.1.5</a>, <a href="#rfc.xref.Part2.11">6.2.3</a>, <a href="#rfc.xref.Part2.12">6.2.3</a>, <a href="#rfc.xref.Part2.13">6.2.3</a>, <a href="#rfc.xref.Part2.14">6.2.3</a>, <a href="#rfc.xref.Part2.15">8.7</a>, <a href="#rfc.xref.Part2.16">10.6</a>, <a href="#rfc.xref.Part2.17">10.6</a>, <a href="#Part2"><b>12.1</b></a><ul> 
    3677                         <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">3.1.1.1</a></li> 
    3678                         <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.7">3.2</a></li> 
    3679                         <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.7.1</a>, <a href="#rfc.xref.Part2.5">3.1.2.1</a></li> 
    3680                         <li><em>Section 6.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.9">6.1.2.2</a>, <a href="#rfc.xref.Part2.10">6.1.5</a></li> 
    3681                         <li><em>Section 6.9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.8">4.1</a></li> 
    3682                         <li><em>Section 7.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.11">6.2.3</a></li> 
    3683                         <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.14">6.2.3</a></li> 
    3684                         <li><em>Section 7.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">2.4</a></li> 
    3685                         <li><em>Section 7.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.15">8.7</a></li> 
    3686                         <li><em>Section 7.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.17">10.6</a></li> 
    3687                         <li><em>Section 7.4.15</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">3.1.1.2</a>, <a href="#rfc.xref.Part2.16">10.6</a></li> 
    3688                         <li><em>Section 9.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.6">3.2</a></li> 
    3689                         <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.12">6.2.3</a>, <a href="#rfc.xref.Part2.13">6.2.3</a></li> 
     3683                  <li><em>Part2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">2.1</a>, <a href="#rfc.xref.Part2.2">2.4</a>, <a href="#rfc.xref.Part2.3">2.7.1</a>, <a href="#rfc.xref.Part2.4">3.1.1.1</a>, <a href="#rfc.xref.Part2.5">3.1.1.2</a>, <a href="#rfc.xref.Part2.6">3.1.2.1</a>, <a href="#rfc.xref.Part2.7">3.2</a>, <a href="#rfc.xref.Part2.8">3.2</a>, <a href="#rfc.xref.Part2.9">4.1</a>, <a href="#rfc.xref.Part2.10">6.1.2.2</a>, <a href="#rfc.xref.Part2.11">6.1.5</a>, <a href="#rfc.xref.Part2.12">6.2.3</a>, <a href="#rfc.xref.Part2.13">6.2.3</a>, <a href="#rfc.xref.Part2.14">6.2.3</a>, <a href="#rfc.xref.Part2.15">6.2.3</a>, <a href="#rfc.xref.Part2.16">8.7</a>, <a href="#rfc.xref.Part2.17">10.6</a>, <a href="#rfc.xref.Part2.18">10.6</a>, <a href="#Part2"><b>12.1</b></a><ul> 
     3684                        <li><em>Section 2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.4">3.1.1.1</a></li> 
     3685                        <li><em>Section 3.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.8">3.2</a></li> 
     3686                        <li><em>Section 4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.3">2.7.1</a>, <a href="#rfc.xref.Part2.6">3.1.2.1</a></li> 
     3687                        <li><em>Section 6.1.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.10">6.1.2.2</a>, <a href="#rfc.xref.Part2.11">6.1.5</a></li> 
     3688                        <li><em>Section 6.9</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.9">4.1</a></li> 
     3689                        <li><em>Section 7.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.1">2.1</a>, <a href="#rfc.xref.Part2.15">6.2.3</a></li> 
     3690                        <li><em>Section 7.1.1</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.12">6.2.3</a></li> 
     3691                        <li><em>Section 7.2.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.2">2.4</a></li> 
     3692                        <li><em>Section 7.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.16">8.7</a></li> 
     3693                        <li><em>Section 7.4</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.18">10.6</a></li> 
     3694                        <li><em>Section 7.4.15</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.5">3.1.1.2</a>, <a href="#rfc.xref.Part2.17">10.6</a></li> 
     3695                        <li><em>Section 9.2</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.7">3.2</a></li> 
     3696                        <li><em>Section 9.3</em>&nbsp;&nbsp;<a href="#rfc.xref.Part2.13">6.2.3</a>, <a href="#rfc.xref.Part2.14">6.2.3</a></li> 
    36903697                     </ul> 
    36913698                  </li> 
  • draft-ietf-httpbis/latest/p1-messaging.xml

    r1469 r1471  
    571571   a message body containing the payload body (if any, 
    572572   <xref target="message.body"/>). 
     573</t> 
     574<t> 
     575   Note that 1xx responses (&status-1xx;) are not final; therefore, a server 
     576   can send zero or more 1xx responses, followed by exactly one final response 
     577   (with any other status code).  
    573578</t> 
    574579<t> 
     
    58555860<section title="Since draft-ietf-httpbis-p1-messaging-17" anchor="changes.since.17"> 
    58565861<t> 
    5857   No changes yet. 
     5862  Closed issues: 
     5863  <list style="symbols"> 
     5864    <t> 
     5865      <eref target="http://tools.ietf.org/wg/httpbis/trac/ticket/300"/>: 
     5866      "Define non-final responses" 
     5867    </t> 
     5868  </list> 
    58585869</t> 
    58595870</section> 
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