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List:       httpclient-commons-dev
Subject:    [jira] Created: (HTTPCORE-107) tolerate SIP or other like-HTTP
From:       "Roland Weber (JIRA)" <jira () apache ! org>
Date:       2007-07-29 20:09:52
Message-ID: 17344731.1185739792818.JavaMail.jira () brutus
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tolerate SIP or other like-HTTP message formats
-----------------------------------------------

                 Key: HTTPCORE-107
                 URL: https://issues.apache.org/jira/browse/HTTPCORE-107
             Project: HttpComponents Core
          Issue Type: Improvement
    Affects Versions: 4.0-alpha5
            Reporter: Roland Weber
             Fix For: 4.0-alpha6


The Session Initiation Protocol in RFC 3261 defines a message format which is \
structurally identical to HTTP/1.1 (http://tools.ietf.org/html/rfc3261#section-7). \
The only difference is that the protocol name used in the request and response lines \
is SIP instead of HTTP, and the version number is 2.0. HttpCore should be able to \
handle these messages, or others with alternative protocol names but identical \
                syntactic structures. There are two parts of core affected:
- HttpVersion currently stores only the version number, but uses a hard-coded \
                protocol name HTTP
- HTTP message parsing checks for a hard-coded protocol name HTTP (both core and NIO)

Note that this is "tolerance for" and not "support of" SIP. SIP makes heavy use of \
intermediate 1xx responses, for which our HttpRequestExecutor and HttpService classes \
are not prepared. The rest of the core/main module, including message representation, \
connections, and the params and interceptor frameworks, could be used for SIP or \
other alternative protocols without further changes.

This is a change of medium complexity which would significantly improve the \
flexibility of the HttpCore module.


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