[sr-dev] [tracker] Comment added: get_body_part2 (parse_body)

[sip-router]

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The following task has a new comment added:

FS#170 - get_body_part2 (parse_body)
User who did this - Luis Martin (lmartin)

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There could scenarios where more than one multipart part with the same TYPE/SUBTYPE are conveyed within the SIP message. How to search for the correct one? In that cases the Content-ID should be provided and is gonna be the key in your multipart search.

Let's say there is an incoming SIP INVITE with some xml information:
Session Initiation Protocol
    Request-Line: INVITE
        Method: INVITE
	(...)
    Message Header
	(...)
        Content-Type: multipart/mixed;boundary=unique-boundary-001
        Content-Length:  900
    Message Body
        MIME Multipart Media Encapsulation, Type: multipart/mixed, Boundary: "unique-boundary-001"
            [Type: multipart/mixed]
            Preamble
            First boundary: --unique-boundary-001\r\n
            Encapsulated multipart part:  (application/sdp)
                Content-Type: application/sdp\r\n
                Content-Length:   400\r\n\r\n
                Session Description Protocol
		(...)
            Boundary: \r\n--unique-boundary-001\r\n
            Encapsulated multipart part:  (application/xml)
                Content-ID: content1\r\n
                Content-Type: application/xml\r\n
                Content-Length:  300\r\n\r\n
                eXtensible Markup Language
		(...)
            Boundary: \r\n--unique-boundary-001\r\n
            Encapsulated multipart part:  (application/xml)
                Content-ID: content2\r\n
                Content-Type: application/xml\r\n
                Content-Length:  200\r\n\r\n
                eXtensible Markup Language
		(...)
            Last boundary: \r\n--unique-boundary-001--\r\n

What if you want to get the second application/xml part of the multipart message?
get_body_part can't retrieve that
get_body_part2 can retrieve that part with:
"get_body_part2(msg, APPLICATION, XML, "content2", NULL, &len)"
and also with:
"get_body_part2(msg, 0, 0, "content2", NULL, &len)"


Hope it helps,
Luis
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http://sip-router.org/tracker/index.php?do=details&task_id=170#comment313

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