本文来自http://blog.csdn.net/hellogv/ ,引用.
最近半年都忙着Android TV项目,在春节假期才有时间写点东西。先在这里给大家拜个年,祝大家龙年快乐...
直接进入主题:本文将会教大家如何实现一个简单的代理服务器(仅支持Http Get),与Android的MediaPlayer结合,从而可以扩展出“播放 防盗链的媒体文件”,“边播放边保存”等的功能。
本文的代码可以到这里下载:http://download.csdn.net/detail/hellogv/4047134,代码分为两个工程:
- J2SE工程:HttpGetProxy,在PC上实现简单的代理服务器,核心类是HttpGetProxy.java,非常容易使用,这里就不唠叨了直接贴出运行效果图:
- Android工程:本文重点,必须唠叨一下。MediaPlayer播放网络音频(http://blog.csdn.net/hellogv/article/details/6406732)与HttpGetProxy.java结合,通过代理服务器播放网络音频。
接下来贴出HttpGetProxy.java的原理图:
接下来贴出HttpGetProxy.java的源码:
通过RemoteSocket的out_remoteSocket可以访问防盗链资源,HttpGetProxy通过2个线程来实现转发,可以在两个线程内实现保存的功能。
[java] view
plaincopyprint?
- <span style="font-family:Comic Sans MS;font-size:18px;">package com.musicplayer;
- import java.io.IOException;
- import java.io.InputStream;
- import java.io.OutputStream;
- import java.net.InetAddress;
- import java.net.InetSocketAddress;
- import java.net.ServerSocket;
- import java.net.Socket;
- import java.net.SocketAddress;
- import java.net.UnknownHostException;
- import android.util.Log;
- public class HttpGetProxy {
- final private String LOCAL_IP_ADDRESS = "127.0.0.1";
- final private int HTTP_PORT = 80;
- private ServerSocket localServer = null;
- private Socket localSocket = null;
- private Socket remoteSocket = null;
- private String remoteIPAddress;
- private InputStream in_remoteSocket;
- private OutputStream out_remoteSocket;
- private InputStream in_localSocket;
- private OutputStream out_localSocket;
- private interface OnFinishListener {
- void onFinishListener();
- }
- public HttpGetProxy(int localport) {
- // --------建立代理中转服务器-----------//
- try {
- localServer = new ServerSocket(localport, 1,
- InetAddress.getByName(LOCAL_IP_ADDRESS));
- } catch (UnknownHostException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- /**
- * 结束时,清除所有资源
- */
- private OnFinishListener finishListener =new OnFinishListener(){
- @Override
- public void onFinishListener() {
- System.out.println("..........release all..........");
- Log.e("---->","..........release all..........");
- try {
- in_localSocket.close();
- out_remoteSocket.close();
- in_remoteSocket.close();
- out_localSocket.close();
- localSocket.close();
- remoteSocket.close();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- };
- public void startProxy(String remoteIpAddr) throws IOException {
- remoteIPAddress = remoteIpAddr;
- SocketAddress address = new InetSocketAddress(remoteIPAddress,HTTP_PORT);
- // --------连接目标服务器---------//
- remoteSocket = new Socket();
- remoteSocket.connect(address);
- System.out.println("..........remote Server connected..........");
- Log.e("---->","..........remote Server connected..........");
- in_remoteSocket = remoteSocket.getInputStream();
- out_remoteSocket = remoteSocket.getOutputStream();
- System.out.println("..........init remote Server I/O..........");
- /**
- * 接收本地request,并转发到远程服务器
- */
- new Thread() {
- public void run() {
- int bytes_read;
- byte[] local_request = new byte[5120];
- try {
- // 本地Socket
- localSocket = localServer.accept();
- System.out.println("..........localSocket connected..........");
- Log.e("---->","..........localSocket connected..........");
- in_localSocket = localSocket.getInputStream();
- out_localSocket = localSocket.getOutputStream();
- System.out.println("..........init local Socket I/O..........");
- Log.e("---->","..........init local Socket I/O..........");
- String buffer = "";
- while ((bytes_read = in_localSocket.read(local_request)) != -1) {
- String str = new String(local_request);
- System.out.println("localSocket " + str);
- Log.e("localSocket---->",str);
- buffer = buffer + str;
- if (buffer.contains("GET")
- && buffer.contains("\r\n\r\n")) {
- //---把request中的本地ip改为远程ip---//
- buffer = buffer.replace(LOCAL_IP_ADDRESS,remoteIPAddress);
- System.out.println("已经替换IP");
- out_remoteSocket.write(buffer.getBytes());
- out_remoteSocket.flush();
- continue;
- } else{
- out_remoteSocket.write(buffer.getBytes());
- out_remoteSocket.flush();
- }
- }
- System.out.println("..........local finish receive...........");
- Log.e("---->","..........local finish receive..........");
- finishListener.onFinishListener();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }.start();
- /**
- * 接收远程服务器reply,并转发到本地客户端
- */
- new Thread() {
- public void run() {
- int bytes_read;
- byte[] remote_reply = new byte[5120];
- try {
- System.out.println("..........remote start to receive...........");
- Log.e("---->","..........remote start to receive..........");
- while ((bytes_read = in_remoteSocket.read(remote_reply)) != -1) {
- //System.out.println("remoteSocket " + remote_reply.length);
- //System.out.println("remoteSocket " + new String(remote_reply));
- out_localSocket.write(remote_reply, 0, bytes_read);
- out_localSocket.flush();
- }
- System.out.println("..........remote finish receive...........");
- Log.e("---->","..........remote finish receive..........");
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }.start();
- }
- }
- </span>
时间: 2024-12-25 23:32:15