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我是Socket通信的新手，所以我可能错了，但请建议或至少给出方向！

我正在根据http://www.csee.umbc.edu/~pmundur/courses/CMSC691C/lab5-kurose-ross.html#appendix实现一个 RTSP 服务器，查看来自http://www的类似代码.java2s.com/Open-Source/Android/UnTagged/mynpr/com/webeclubbin/mynpr/RTSPserver.java.htm

目前我正在实施对 OPTIONS 请求的响应。为了简化第一种方法，我决定根据为 vlc 和 gstreamer rtsp 之间的一些实际通信完成的示例 RTSP 请求/响应日志对答案进行硬编码。

因此，使用 vlc URL -vvv 记录的日志说：

Sending request: OPTIONS rtsp://localhost:8554/test RTSP/1.0
CSeq: 2
User-Agent: LibVLC/2.0.8 (LIVE555 Streaming Media v2013.04.30)


Received 183 new bytes of response data.
Received a complete OPTIONS response:
RTSP/1.0 200 OK
CSeq: 2
Public: OPTIONS, DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN
Server: GStreamer RTSP server
Date: Tue, 10 Sep 2013 19:56:53 GMT


Sending request: DESCRIBE rtsp://localhost:8554/test RTSP/1.0
CSeq: 3
User-Agent: LibVLC/2.0.8 (LIVE555 Streaming Media v2013.04.30)
Accept: application/sdp

IE

RTSP/1.0 200 OK
CSeq: 2
Public: OPTIONS, DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN
Server: GStreamer RTSP server
Date: Tue, 10 Sep 2013 19:56:53 GMT

部分是 183 字节长度

我正在根据示例写入缓冲区：

 try{
        System.out.println("S -> C");
        System.out.println("RTSP/1.0 200 OK");
        System.out.println("CSeq: "+RTSPSeqNb);
        //System.out.println("Session: "+RTSP_ID);
        if (responceType==OPTIONS) {System.out.println("Public: OPTIONS, DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN");};
        if (responceType==OPTIONS) {System.out.println("Server: GStreamer RTSP server");                                                        };
        if (responceType==OPTIONS) {System.out.println("Date: Tue, 10 Sep 2013 19:56:53 GMT");};
        RTSPBufferedWriter.write("RTSP/1.0 200 OK"+CRLF);
        RTSPBufferedWriter.write("CSeq: "+RTSPSeqNb+CRLF);
        //RTSPBufferedWriter.write("Session: "+RTSP_ID+CRLF);
        if (responceType==OPTIONS) {RTSPBufferedWriter.write("Public: OPTIONS, DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN"+CRLF);};
        if (responceType==OPTIONS) {RTSPBufferedWriter.write("Server: GStreamer RTSP server"+CRLF);                                                        };
        if (responceType==OPTIONS) {RTSPBufferedWriter.write("Date: Tue, 10 Sep 2013 19:56:53 GMT"+CRLF);            };
        RTSPBufferedWriter.write("Session: "+RTSP_ID+"\r"+CRLF);
        RTSPBufferedWriter.flush();

        //RTSPBufferedWriter.newLine();
        System.out.println("RTSP Server - Sent response to Client.");

    }
    catch(IOException ex)
    {
        System.out.println("Exception caught: "+ex.getStackTrace());
        //    System.exit(0);
    }

vlc 日志说

Opening connection to 127.0.0.1, port 6666...
...remote connection opened
Sending request: OPTIONS rtsp://127.0.0.1:6666/autostream.mjpg RTSP/1.0
CSeq: 2
User-Agent: LibVLC/2.0.8 (LIVE555 Streaming Media v2013.04.30)


Received 193 new bytes of response data.
[0x7fd01c001178] live555 demux debug: connection timeout
[0x7fd01c001178] live555 demux error: Failed to connect with rtsp://127.0.0.1:6666/autostream.mjpg

其中 CRLF 是“\n”。在我尝试 CRLF="\r\n" （最后一行没有 +"\r"+ ）之前

Received 198 new bytes of response data.

那么，那里出了什么问题？vlc 还在等什么？为什么示例中的默认分隔符不适用于它？

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1 回答 1

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在我将问题发布到 stackoverflow 后，我似乎总能找到答案......

DOUBLE CRLF 应该位于通常 RTSP 协议的最后一个标头之后 9 而不是示例中使用的自定义标头）。

于 2013-09-10T23:41:28.647 回答