使用wsock32抓一个http页面，能编译通过，能运行，就是得不到结果。

2014-02-09 06:46:04 378 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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#include <windows.h>

#include <stdio.h>

#pragma comment(lib,"wsock32.lib")





void SendString(SOCKET sock,LPCSTR str);

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

                    PSTR szCmdLine, int iCmdShow)

{

	WSADATA  wsaData;

 SOCKET  sock;

 SOCKADDR_IN tcpaddr;

 hostent * remoteHost;

 char   host[] = {"www.hao123.com"};     //主机名就直接写了

 int   Ret,l;

 BOOL  done;

 int   port = 80;

 int   chars = 0;

 char  buffer[512];



 if( (Ret = WSAStartup(MAKEWORD(1,1), &wsaData) ) != 0 )

 {

  MessageBox (NULL, TEXT ("msg!"), TEXT ("WSAStartup failed with error %d\n"), 0) ;

  return 1;

 }



 if( (remoteHost = gethostbyname(host)) == NULL )       //通过主机名获取地址

 {

  MessageBox (NULL, TEXT ("msg!"), TEXT ("gethostbyname error!"), 0) ;

  return 1;

 }

 

 sock = socket (AF_INET, SOCK_STREAM, 0);

 

 tcpaddr.sin_family = AF_INET;

 tcpaddr.sin_port = htons( (unsigned short)port );

 tcpaddr.sin_addr.s_addr = *((unsigned long *)*remoteHost->h_addr_list);  //转换地址



 if( connect(sock, (const sockaddr * )&tcpaddr, sizeof(tcpaddr)) )

 {

  MessageBox (NULL, TEXT ("msg!"), TEXT ("connect error!"), 0) ;

  return 1;

 }

//这里是要发送的http头部

 SendString(sock,"GET / HTTP/1.1/r/n");

 SendString(sock,"Host:www.hao123.com/r/n");

 SendString(sock,"Accept: */*/r/n");

 SendString(sock,"User-Agent: Mozilla/4.0");

 SendString(sock,"(compatible; MSIE 5.00; Windows 98)/r/n");

 SendString(sock,"Connection:Keep-Alive/r/n");

 SendString(sock,"/r/n");

 SendString(sock,"/r/n");//最后要加空行



 done = FALSE;

 FILE * fp;

 fp = fopen("1.txt","w");

//打印并保存http响应的头部

    while(!done)

    {

        l = recv(sock,buffer,1,0);

        if(l<0)

            done=TRUE;

		switch(*buffer)

        {

            case '/r':

                break;

            case '/n':

                if(chars==0)

                    done = TRUE;

                chars=0;

                break;

            default:

                chars++;

                break;

        }

		fputc(buffer[0],fp);

    }



//接收正文部分

 int sum = 0;

 do

 {

  l = recv(sock,buffer,sizeof(buffer)-1,0);

  if( l < 0 )

   break;

  sum += l;

  *(buffer + l) = 0;

  fputs(buffer,fp);

 } while( l > 0 );



 //这里输出正文部分大小，发现其实和响应消息头部的Content-length大小是一样的

//这样就可以检查是否接受完毕





 closesocket(sock);



 if( WSACleanup() == SOCKET_ERROR )

 {

	  MessageBox (NULL, TEXT ("msg!"), TEXT ("WSACleanup failed with error \n"), 0) ;

 }



 return 0;

}



void SendString(SOCKET sock,LPCSTR str)

{

    send(sock,str,strlen(str),0);

}