Android MediaPlayer与Http Proxy结合之优化篇

本文来自http://blog.csdn.net/hellogv/ ，引用必须注明出处！

  本文是在《玩转 Android MediaPlayer之视频预加载(优化)》基础上修复Http代理服务器(Http Proxy)透传的bug。前面几篇相关文章所用的代理服务器一个时间只能监听来自Mediaplayer的一个Request请求，但在实际项目开发过程中，发现有些支持m3u8格式Mediaplayer发出新的Request请求之前不会中断旧的Request请求，所以本文代码会加入多线程监听Request请求。

  本文代码可以在这里下载：http://download.csdn.net/detail/hellogv/4894109

  代理服务器被初始化之后，开始2个线程监听MediaPlayer的Request请求：

public HttpGetProxy(String dirPath,int size,int maximum) {
    try {
        //初始化代理服务器
        mBufferDirPath = dirPath;
        mBufferSize=size;
        mBufferFileMaximum = maximum;
        localHost = Config.LOCAL_IP_ADDRESS;
        localServer = new ServerSocket(0, 1,InetAddress.getByName(localHost));
        localPort =localServer.getLocalPort();//有ServerSocket自动分配端口
        //启动代理服务器
        new Thread() {
            public void run() {
                startProxy();
            }
        }.start();

        mEnable = true;
    } catch (Exception e) {
        mEnable = false;
    }
}

private void startProxy() {
    while (true) {
        // --------------------------------------
        // 监听MediaPlayer的请求，MediaPlayer->代理服务器
        // --------------------------------------
        Log.i(TAG, "......ready to start...........");
        try {
            Socket s = localServer.accept();
            if(proxy!=null){
                proxy.closeSockets();
            }
            Log.i(TAG, "......started...........");
            proxy = new Proxy(s);

            new Thread(){
                public void run(){
                    Log.i(TAG, "......ready to start...........");
                    try {
                        Socket s = localServer.accept();
                        proxy.closeSockets();
                        Log.i(TAG, "......started...........");
                        proxy = new Proxy(s);
                        proxy.run();
                    } catch (IOException e) {
                        Log.e(TAG, e.toString());
                        Log.e(TAG, Utils.getExceptionMessage(e));
                    }

                }
            }.start();
            proxy.run();
        } catch (IOException e) {
            Log.e(TAG, e.toString());
            Log.e(TAG, Utils.getExceptionMessage(e));
        }
    }
}

  代理服务器收到Request请求（seek的操作）之后，用新线程建立Socket，而旧的Socket会因为OutputStream的write异常而进入异常处理，所以要在异常处理里回收Socket资源。 本文的代理服务器在mediaplayer seek之后的log如下：

12-16 13:55:53.181: I/HttpParser<---(27624): HTTP/1.1 206 Partial Content
12-16 13:55:53.181: I/HttpParser<---(27624): Content-Length: 665139733
12-16 13:55:53.181: I/HttpParser<---(27624): Content-Type: application/force-download
12-16 13:55:53.181: I/HttpParser<---(27624): Content-Range: bytes 2906976-668046708/668046709
12-16 13:55:53.181: I/HttpParser<---(27624): Last-Modified: Thu, 13 Dec 2012 14:28:00 GMT
12-16 13:55:53.181: I/HttpParser<---(27624): Accept-Ranges: bytes
12-16 13:55:53.181: I/HttpParser<---(27624): ETag: "80b39bd3ed9cd1:2d6"
12-16 13:55:53.181: I/HttpParser<---(27624): Server: Microsoft-IIS/6.0
12-16 13:55:53.181: I/HttpParser<---(27624): Content-Disposition: attachment
12-16 13:55:53.181: I/HttpParser<---(27624): Date: Sun, 16 Dec 2012 05:55:45 GMT
12-16 13:55:53.181: I/HttpParser<---(27624): Connection: close
12-16 13:55:53.181: I/HttpParser<---(27624):
12-16 13:55:59.631: I/HttpGetProxy(27624): ......started...........
12-16 13:55:59.631: I/HttpGetProxy(27624): <----------------------------------->
12-16 13:55:59.641: I/HttpParser(27624): GET /%E6%89%8B%E6%9C%BA%E7%94%B5%E5%BD%B1/201212/%E5%BF%97%E6%98%8E%E4%B8%8E%E6%98%A5%E5%A8%87-2mp4-800x448.mp4 HTTP/1.1
12-16 13:55:59.641: I/HttpParser(27624): User-Agent: AppleCoreMedia/1.0.0.8C148 (iPad; U; CPU OS 4_2_1 like Mac OS X; zh_cn)
12-16 13:55:59.641: I/HttpParser(27624): Accept: */*
12-16 13:55:59.641: I/HttpParser(27624): Range: bytes=401793617-
12-16 13:55:59.641: I/HttpParser(27624): Connection: close
12-16 13:55:59.641: I/HttpParser(27624): Host: d1.2mp4.net
12-16 13:55:59.641: I/HttpParser(27624):
12-16 13:55:59.641: I/HttpParser(27624): ------->rangePosition:401793617
12-16 13:55:59.641: E/HttpGetProxy(27624): java.net.SocketException: Socket is closed
12-16 13:55:59.641: E/HttpGetProxy(27624): java.net.Socket.checkOpenAndCreate  641line
12-16 13:55:59.641: E/HttpGetProxy(27624): java.net.Socket.getOutputStream  381line
12-16 13:55:59.641: E/HttpGetProxy(27624): com.proxy.HttpGetProxyUtils.sendToMP  112line
12-16 13:55:59.641: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$Proxy.run  292line
12-16 13:55:59.641: E/HttpGetProxy(27624): com.proxy.HttpGetProxy.startProxy  213line
12-16 13:55:59.641: E/HttpGetProxy(27624): com.proxy.HttpGetProxy.access$8  183line
12-16 13:55:59.641: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$1.run  78line
12-16 13:55:59.641: I/HttpGetProxy(27624): ......ready to start...........
12-16 13:56:01.181: I/HttpParser<---(27624): HTTP/1.1 206 Partial Content
12-16 13:56:01.181: I/HttpParser<---(27624): Content-Length: 266253092
12-16 13:56:01.181: I/HttpParser<---(27624): Content-Type: application/force-download
12-16 13:56:01.181: I/HttpParser<---(27624): Content-Range: bytes 401793617-668046708/668046709
12-16 13:56:01.181: I/HttpParser<---(27624): Last-Modified: Thu, 13 Dec 2012 14:28:00 GMT
12-16 13:56:01.181: I/HttpParser<---(27624): Accept-Ranges: bytes
12-16 13:56:01.181: I/HttpParser<---(27624): ETag: "80b39bd3ed9cd1:2d6"
12-16 13:56:01.181: I/HttpParser<---(27624): Server: Microsoft-IIS/6.0
12-16 13:56:01.181: I/HttpParser<---(27624): Content-Disposition: attachment
12-16 13:56:01.181: I/HttpParser<---(27624): Date: Sun, 16 Dec 2012 05:55:54 GMT
12-16 13:56:01.181: I/HttpParser<---(27624): Connection: close
12-16 13:56:01.181: I/HttpParser<---(27624):
12-16 13:56:01.181: I/HttpGetProxy(27624): ----------------->需要发送预加载到MediaPlayer
12-16 13:56:01.181: I/HttpGetProxy(27624): >>>不读取预加载文件 range:401793617,buffer:2906976
12-16 13:56:13.761: E/HttpGetProxy(27624): java.net.SocketException: sendto failed: ECONNRESET (Connection reset by peer)
12-16 13:56:13.761: E/HttpGetProxy(27624): libcore.io.IoBridge.maybeThrowAfterSendto  496line
12-16 13:56:13.761: E/HttpGetProxy(27624): libcore.io.IoBridge.sendto  465line
12-16 13:56:13.761: E/HttpGetProxy(27624): java.net.PlainSocketImpl.write  507line
12-16 13:56:13.761: E/HttpGetProxy(27624): java.net.PlainSocketImpl.access$100  46line
12-16 13:56:13.761: E/HttpGetProxy(27624): java.net.PlainSocketImpl$PlainSocketOutputStream.write  269line
12-16 13:56:13.761: E/HttpGetProxy(27624): com.proxy.HttpGetProxyUtils.sendToMP  112line
12-16 13:56:13.761: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$Proxy.run  292line
12-16 13:56:13.761: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$2.run  205line
12-16 13:56:13.771: I/HttpGetProxy(27624): ......started...........
12-16 13:56:13.771: I/HttpGetProxy(27624): <----------------------------------->
12-16 13:56:13.771: I/HttpParser(27624): GET /%E6%89%8B%E6%9C%BA%E7%94%B5%E5%BD%B1/201212/%E5%BF%97%E6%98%8E%E4%B8%8E%E6%98%A5%E5%A8%87-2mp4-800x448.mp4 HTTP/1.1
12-16 13:56:13.771: I/HttpParser(27624): User-Agent: AppleCoreMedia/1.0.0.8C148 (iPad; U; CPU OS 4_2_1 like Mac OS X; zh_cn)
12-16 13:56:13.771: I/HttpParser(27624): Accept: */*
12-16 13:56:13.771: I/HttpParser(27624): Range: bytes=612718942-
12-16 13:56:13.771: I/HttpParser(27624): Connection: close
12-16 13:56:13.771: I/HttpParser(27624): Host: d1.2mp4.net
12-16 13:56:13.771: I/HttpParser(27624):
12-16 13:56:13.771: I/HttpParser(27624): ------->rangePosition:612718942
12-16 13:56:13.781: I/HttpGetProxy(27624): ......ready to start...........
12-16 13:56:14.051: I/HttpParser<---(27624): HTTP/1.1 206 Partial Content
12-16 13:56:14.051: I/HttpParser<---(27624): Content-Length: 55327767
12-16 13:56:14.051: I/HttpParser<---(27624): Content-Type: application/force-download
12-16 13:56:14.051: I/HttpParser<---(27624): Content-Range: bytes 612718942-668046708/668046709
12-16 13:56:14.051: I/HttpParser<---(27624): Last-Modified: Thu, 13 Dec 2012 14:28:00 GMT
12-16 13:56:14.051: I/HttpParser<---(27624): Accept-Ranges: bytes
12-16 13:56:14.051: I/HttpParser<---(27624): ETag: "80b39bd3ed9cd1:2d6"
12-16 13:56:14.051: I/HttpParser<---(27624): Server: Microsoft-IIS/6.0
12-16 13:56:14.051: I/HttpParser<---(27624): Content-Disposition: attachment
12-16 13:56:14.051: I/HttpParser<---(27624): Date: Sun, 16 Dec 2012 05:56:06 GMT
12-16 13:56:14.051: I/HttpParser<---(27624): Connection: close
12-16 13:56:14.051: I/HttpParser<---(27624):
12-16 13:56:14.051: I/HttpGetProxy(27624): ----------------->需要发送预加载到MediaPlayer
12-16 13:56:14.051: I/HttpGetProxy(27624): >>>不读取预加载文件 range:612718942,buffer:2906976
12-16 13:56:49.051: I/HttpGetProxy(27624): ......started...........
12-16 13:56:49.051: I/HttpGetProxy(27624): <----------------------------------->
12-16 13:56:49.051: E/HttpGetProxy(27624): java.net.SocketException: Socket closed
12-16 13:56:49.051: E/HttpGetProxy(27624): libcore.io.Posix.recvfromBytes  -2line
12-16 13:56:49.051: E/HttpGetProxy(27624): libcore.io.Posix.recvfrom  131line
12-16 13:56:49.051: E/HttpGetProxy(27624): libcore.io.BlockGuardOs.recvfrom  164line
12-16 13:56:49.051: E/HttpGetProxy(27624): libcore.io.IoBridge.recvfrom  503line
12-16 13:56:49.051: E/HttpGetProxy(27624): java.net.PlainSocketImpl.read  488line
12-16 13:56:49.051: E/HttpGetProxy(27624): java.net.PlainSocketImpl.access$000  46line
12-16 13:56:49.051: E/HttpGetProxy(27624): java.net.PlainSocketImpl$PlainSocketInputStream.read  240line
12-16 13:56:49.051: E/HttpGetProxy(27624): java.io.InputStream.read  163line
12-16 13:56:49.051: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$Proxy.run  288line
12-16 13:56:49.051: E/HttpGetProxy(27624): com.proxy.HttpGetProxy.startProxy  213line
12-16 13:56:49.051: E/HttpGetProxy(27624): com.proxy.HttpGetProxy.access$8  183line
12-16 13:56:49.051: E/HttpGetProxy(27624): com.proxy.HttpGetProxy$1.run  78line
12-16 13:56:49.051: I/HttpGetProxy(27624): ......ready to start...........
12-16 13:56:49.051: I/HttpParser(27624): GET /%E6%89%8B%E6%9C%BA%E7%94%B5%E5%BD%B1/201212/%E5%BF%97%E6%98%8E%E4%B8%8E%E6%98%A5%E5%A8%87-2mp4-800x448.mp4 HTTP/1.1
12-16 13:56:49.051: I/HttpParser(27624): User-Agent: AppleCoreMedia/1.0.0.8C148 (iPad; U; CPU OS 4_2_1 like Mac OS X; zh_cn)
12-16 13:56:49.051: I/HttpParser(27624): Accept: */*
12-16 13:56:49.051: I/HttpParser(27624): Range: bytes=152226030-
12-16 13:56:49.051: I/HttpParser(27624): Connection: close
12-16 13:56:49.051: I/HttpParser(27624): Host: d1.2mp4.net
12-16 13:56:49.051: I/HttpParser(27624):
12-16 13:56:49.051: I/HttpParser(27624): ------->rangePosition:152226030
12-16 13:56:49.311: I/HttpParser<---(27624): HTTP/1.1 206 Partial Content
12-16 13:56:49.311: I/HttpParser<---(27624): Content-Length: 515820679
12-16 13:56:49.311: I/HttpParser<---(27624): Content-Type: application/force-download
12-16 13:56:49.311: I/HttpParser<---(27624): Content-Range: bytes 152226030-668046708/668046709
12-16 13:56:49.311: I/HttpParser<---(27624): Last-Modified: Thu, 13 Dec 2012 14:28:00 GMT
12-16 13:56:49.311: I/HttpParser<---(27624): Accept-Ranges: bytes
12-16 13:56:49.311: I/HttpParser<---(27624): ETag: "80b39bd3ed9cd1:2d6"
12-16 13:56:49.311: I/HttpParser<---(27624): Server: Microsoft-IIS/6.0
12-16 13:56:49.311: I/HttpParser<---(27624): Content-Disposition: attachment
12-16 13:56:49.311: I/HttpParser<---(27624): Date: Sun, 16 Dec 2012 05:56:42 GMT
12-16 13:56:49.311: I/HttpParser<---(27624): Connection: close
12-16 13:56:49.311: I/HttpParser<---(27624):
12-16 13:56:49.311: I/HttpGetProxy(27624): ----------------->需要发送预加载到MediaPlayer
12-16 13:56:49.311: I/HttpGetProxy(27624): >>>不读取预加载文件 range:152226030,buffer:2906976