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<p class="MsoNormal">Dear Sir,<o:p></o:p></p>
<p class="MsoNormal">While talking about RTSP over HTTP, I think the original idea should be from a proposal for QuickTime:<o:p></o:p></p>
<p class="MsoNormal"><a href="https://opensource.apple.com/source/QuickTimeStreamingServer/QuickTimeStreamingServer-412.42/Documentation/RTSP_Over_HTTP.pdf">https://opensource.apple.com/source/QuickTimeStreamingServer/QuickTimeStreamingServer-412.42/Documentation/RTSP_Over_HTTP.pdf</a><o:p></o:p></p>
<p class="MsoNormal">I wonder if this protocol has been adopted as a standard (check this:
<a href="https://tools.ietf.org/html/draft-gentric-avt-rtsp-http-00">https://tools.ietf.org/html/draft-gentric-avt-rtsp-http-00</a>)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">According the original paper, QuickTime utilize “HTTP/1.0” to define the HTTP tunnel for the RTSP rather than “HTTP/1.1”.<o:p></o:p></p>
<p class="MsoNormal">However, I found in live555’s implements, both client and server use HTTP/1.1 instead.
<o:p></o:p></p>
<p class="MsoNormal">And, this leads a problem. In HTTP/1.1, the standard requires all the implement should support “chunked” transfer-coding.<o:p></o:p></p>
<p class="MsoNormal">Please check “4.4 Message Length, item 4” in HTTP 1.1 RFC2616 as follow:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:13.5pt;color:black">All HTTP/1.1 applications that receive entities MUST accept the "chunked" transfer-coding (section 3.6), thus allowing this mechanism to be used for messages when the message length cannot be determined
in advance.</span><span style="color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Unfortunately, the current live555 version does not support chunked transfer-coding since the header of http tunneling marks “HTTP/1.1”.<o:p></o:p></p>
<p class="MsoNormal">A better way is, either live555 use HTTP/1.0 instead, or to support chunked transfer-coding with HTTP/1.1.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Do you think is it possible to let the community to make this change?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal">David Yang<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Digital Surveillance Software Dept. I<br>
Alpha Networks Inc.<br>
Tel: 886-2-77206006 ext.3858<br>
Mobile: 886-988335406<br>
E-mail: <a href="mailto:david_yang@alphanetworks.com"><span style="color:blue">david_yang@alphanetworks.com</span></a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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