/**
     * 方法名称：runServer<p>
     * 方法功能：运行代理服务器<p>
     * 参数说明： <p>
     * 返回：void <p>
     * 作者：李明
     * 日期：2006年3月9日
     * @throws IOException
     */
    public void runServer() throws IOException
    {
        // 创建代理服务器监听,端口默认为9999(可以通过属性文档修改其他端口)
        ServerSocket ss = new ServerSocket(localport);
        final com.zte.ums.zxnm01.cpe.common.http.ProxyUtil proxyUtil = new com.zte.ums.zxnm01.cpe.common.http.ProxyUtil();
        final byte[] request = new byte[1024];
        byte[] reply = new byte[4096];

        while(true)
        {
            Socket client = null, server = null;
            try
            {
                // 等待客户连接
                client = ss.accept();
                log.info("*******Client logon*******");
                log.info(client);
                final InputStream streamFromClient = client.getInputStream();
                final OutputStream streamToClient = client.getOutputStream();

                // 连接真实的服务器,如果不能连接成功,将向客户发送错误信息,断开本次连接
                // 并且继续等待连接.
                try
                {
                    server = new Socket(host, remoteport);
                }
                catch(IOException e)
                {
                    PrintWriter out = new PrintWriter(streamToClient);
                    out.print("Proxy server cannot connect to " + host + ":" + remoteport + ":\n" + e + "\n");
                    out.flush();
                    client.close();
                    continue;
                }

                // 得到连接服务器的输入输出流.
                final InputStream streamFromServer = server.getInputStream();
                final OutputStream streamToServer = server.getOutputStream();

                // 构建一个单独线程读客户请求并传给服务器,此线程为异步.
                Thread t = new Thread()
                {
                    public void run()
                    {
                        int bytesRead;
                        String context = null;
                        try
                        {
                            while((bytesRead = streamFromClient.read(request)) != -1)
                            {
                                streamToServer.write(request, 0, bytesRead);
                                context = new String(request).trim();
                                streamToServer.flush();
                            }
                            // 打印客户浏览器发来的信息
                            log.info("#################S##############");
                            log.info(context);
                            log.info("#################E##############");
                            // 解析发来的信息,获取请求的主机地址和端口.
                            proxyUtil.setUrl(context);
                            host = proxyUtil.getHost();
                            remoteport = proxyUtil.getPort();
                            log.info("host : '" + host + "'" + " port : '" + remoteport + "'");

                        }
                        catch(IOException e)
                        {
                            // e.printStackTrace();
                        }

                        // 关闭请求服务器连接,屏蔽无意义的异常,减少代理服务器负担.
                        try
                        {
                            streamToServer.close();
                        }
                        catch(IOException e)
                        {
                            // e.printStackTrace();
                        }
                    }
                };

                // 开启客户端到服务器请求线程
                t.start();

                // 读服务器的请求,成功后返回信息给客户端.
                int bytesRead;
                try
                {
                    while((bytesRead = streamFromServer.read(reply)) != -1)
                    {
                        streamToClient.write(reply, 0, bytesRead);
                        streamToClient.flush();
                    }
                }
                catch(IOException e)
                {
                    // e.printStackTrace();
                }

                // 关闭客户连接.
                streamToClient.close();
            }
            catch(IOException e)
            {
                System.err.println(e);
            }
            finally
            {
                try
                {
                    if(server != null)
                    {
                        server.close();
                    }
                    if(client != null)
                    {
                        client.close();
                    }
                }
                catch(IOException e)
                {
                    e.printStackTrace();
                }
            }
        }
    }