[Bug 792804] New: gst_rtsp_mount_points_match does not match on a prefix unless gint*matched !=NULL

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=792804

            Bug ID: 792804
           Summary: gst_rtsp_mount_points_match does not match on a prefix
                    unless gint*matched !=NULL
    Classification: Platform
           Product: GStreamer
           Version: 1.12.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-rtsp-server
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: gnucash at thoth.purplefrog.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

I was trying to create an RTSP/HTTP proxy using the gst-rtsp-server framework. 
I created a factory and tried to mount it on /proxy in hopes that I could serve
up media when a client connected to rtsp://localhost:8554/proxy/bigbuckbunny or
rtsp://localhost:8554/proxy/caminandes .

Unfortunately it appears that gst_rtsp_mount_points_match will not return the
factory for a partial match if the gint*matched parameter is NULL.

This happens to be the case when handle_describe_request() calls find_media(). 
Likewise handle_announce_request().  So while the factory might be usable in a
SETUP call, it causes a 404 for the media in a DESCRIBE RTSP request.

If it is important for the gst_rtsp_mount_points_match to return null for
prefix matches when matched==null (which appears to be the behavior described
in the API documentation), then I recommend you adjust handle_announce_request
and handle_describe_request to pass in a non-zero matched pointer.

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