请大家帮小弟我看下socket实现HTTP通信的有关问题（有源代码），解决了200分没的说！

#include <stdio.h>
#include <iostream>
#include <winsock2.h>
#include <process.h>
#include "SockInit.h"
using namespace std;

#define MAX_REQUESTLINE_LEN  2048  // IE请求行长度

void __cdecl ServerThreadProc(void *param);
int TCPsend(SOCKET s,const char*buf,int len,int flags);
int TCPrecv(SOCKET s,const char*buf,int len,int flags);
/************************************************

 调试环境:Visual C++6.0 SP6+platform SDK 2003 R2

 程序名称:HTTP proxy Server(HttpProxySvr.cpp)

 功能    :IE通过设置代理方式上网,IE所有请求均
          先发到该代理服务器,代理服务器
          将请求直接转发给webserver, 
          后从webserver读取响应后发回IE

 存在的问题: IE设置代理后只能显示网页文本内容,图片
             显示不了,若网页嵌有歌曲,歌曲也下载不
             下来(自然歌曲也播放不了)...

 Date:    2007/10/12
 author:  liqisong
 eamil :  liqisong611@yahoo.com.cn
 
**************************************************/

int main()
{
    USHORT uPort=9999;   // 通信端口
    
         WORD wVersionRequested;
       WSADATA wsaData;
      int err;
 
      wVersionRequested = MAKEWORD( 2, 2 );
 
      err = WSAStartup( wVersionRequested, &wsaData );
      if ( err != 0 ) 
      {
         return 0;
      }
 
                             
 
   if ( LOBYTE( wsaData.wVersion ) != 2 ||
        HIBYTE( wsaData.wVersion ) != 2 ) 
     {
                                 
    WSACleanup( );
    return  0; 
    }
    SOCKET sListen = socket(AF_INET,SOCK_STREAM,0);
    if(sListen == INVALID_SOCKET)
    {
        printf("Failed socket(),error code :%d",WSAGetLastError());
        return 0;
    }

    sockaddr_in sin;
    sin.sin_addr.S_un.S_addr = INADDR_ANY;
    sin.sin_family =AF_INET;
    sin.sin_port = htons(uPort);
 
    if(bind(sListen,(sockaddr*)&sin,sizeof(sin))==SOCKET_ERROR)
    {
        printf("Failed bind(),error code :%d",WSAGetLastError());
        closesocket(sListen);
        return 0;
    }

    int res =listen(sListen,200);

    sockaddr_in addrRemote;
    int len =sizeof(addrRemote);
    while(true)
    {
        SOCKET sNew = accept(sListen,(sockaddr*)&addrRemote,&len);
        if(sNew == INVALID_SOCKET)
        {
            printf("Failed accept(),error code :%d",WSAGetLastError());
            return 0;
        }
        
        printf("收到一个IE连接(IP:%s)\n",inet_ntoa(addrRemote.sin_addr));

        // 创建一个线程处理该连接 (每客户单线程模式...)
        _beginthread(ServerThreadProc,0,(void*)sNew);
    }
   
    closesocket(sListen);

    return 0;
}

void __cdecl ServerThreadProc(void *param)
{
    SOCKET sock = (SOCKET)param;   //与浏览器连接的套接口

    char request[MAX_REQUESTLINE_LEN];
    memset(request,0,MAX_REQUESTLINE_LEN);
    int res =recv(sock,request,MAX_REQUESTLINE_LEN,0);  // 接收浏览器(客户端)发来的请求
    if(res==0)
    {
        
        printf("连接断开\n");
        
        closesocket(sock);
        return;
    }
    shutdown(sock,SD_RECEIVE);
    //  打印收到的请求
    printf("header length :%d  header: %s\n",res,request);
    
    // 分析请求行(分离出WebServer域名)
    char szAddrName[1024]={0}; //域名
    int i =11;
    while(request[i]!='/'&&i<res)
    {
        szAddrName[i-11] = request[i];
        i++;
        
    }
    szAddrName[i-11]='\0';    
    
    printf("WebServer address: %s\n\n",szAddrName);
    
    // 向WebServer提交请求
    SOCKADDR_IN   saServer;   
    LPHOSTENT     lphostent;     
    SOCKET        hsocket;
    int   nRet;   
    
    lphostent=gethostbyname(szAddrName); // 通过域名获得目标WebServer的IP 
    if(lphostent==NULL)
    {
        printf("Failed gethostbyname(),error code:%d\n",WSAGetLastError());
        return ;       
    }

    hsocket = socket(AF_INET,SOCK_STREAM,0); 
    if(hsocket==INVALID_SOCKET)
    {
       printf("Failed socket(),error code:%d\n",WSAGetLastError());
       return ;       
    }
    saServer.sin_family = AF_INET;   
    saServer.sin_port = htons(80);    
    saServer.sin_addr= *((LPIN_ADDR)*lphostent->h_addr_list);   
    
    nRet = connect(hsocket,(LPSOCKADDR)&saServer,sizeof(SOCKADDR_IN));   
    if(nRet==SOCKET_ERROR)   
    {   
        printf("Failed connect(),error code:%d\n",WSAGetLastError());
        closesocket(hsocket);   
        return;   
    } 
    
    //  向webserver转发IE请求 
    nRet = TCPsend(hsocket,request,strlen(request),0);
    
    char   dest[1000];   
    nRet=1; 
    int senlen=0;
    while(nRet>0)   
    {   
        memset(dest,0,1000);
        nRet=recv(hsocket,dest,sizeof(dest)-1,0);  // 从webserver获取数据 
        if(nRet==0)   
        {
            printf("与webserver(%s)的连接关闭\n",szAddrName);
            
            break;
        }
        else  if(nRet==SOCKET_ERROR )
        {
           printf("Failed recv(),error code:%d\n",WSAGetLastError());       
           break;
        }
        dest[nRet]='\0';

        senlen = TCPsend(sock,dest,strlen(dest),0);  //将数据转发给IE浏览器
        if(senlen==0)
        {
            sockaddr_in sin;
            int len = sizeof(sin);
            if(getpeername(sock,(sockaddr*)&sin,&len)== SOCKET_ERROR)
            {
                printf("Failed getpeername(),error code:%d\n",WSAGetLastError());
                break;
            }
            printf("与浏览器(%s)的一个连接关闭...\n",inet_ntoa(sin.sin_addr));
            break;
        }
        else if(senlen==SOCKET_ERROR)
        {
           printf("Failed send(),error code:%d\n",WSAGetLastError());       
           break;
        }

        // printf("%s\n",dest);

    } // end of while(nRet>0)   


    closesocket(sock);
    closesocket(hsocket);

}

int TCPsend(SOCKET s,const char*buf,int len,int flags)
{
    int n=0,sendCount=0;
    int length =len;
    if(buf==NULL)
        return 0;
    while(length>0)
    {
        n=send(s,buf+sendCount,length,flags); //发送数据，
        if(n==SOCKET_ERROR)//网络出现异常
        {
            printf("Failed send(),error code:%d\n",WSAGetLastError());
            break;
            
        }
        length-=n;
        sendCount+=n; 
    }

    return sendCount; // 返回已发送的字节数
}

int TCPrecv(SOCKET s,char *buf,int len,int flags)
{
    
    int nRev=0,recvCount=0;
    int length =len;

    if(buf==NULL)
        return 0;

    // 循环接收数据
    while(length>0)
    {
        nRev =recv(s,buf+recvCount,length,flags);
        if(nRev==SOCKET_ERROR)//网络出现异常
        {
            printf("Failed recv(),error code:%d\n",WSAGetLastError());
            break;
        }
        length-=nRev;
        recvCount+=nRev;
    }

    return recvCount; //返回接收到的字节数
}