一个c++的 http get 代码

代码如下（摘自：http://bbs.csdn.net/topics/320012075）：

#include <winsock2.h>
#include<windows.h>
#include<stdio.h>
#pragma comment(lib, "ws2_32.lib")
 
int main(int argc, char* argv[])
{
    char server_name[256]= "www.163.com";
 
    WSADATA wsaData;
    struct sockaddr_in srv_addr;
 
    if (WSAStartup(0x202,&wsaData) == SOCKET_ERROR) {
        WSACleanup();
        return -1;
    }
 
    SOCKET cli_sock=socket(PF_INET,SOCK_STREAM,0);
    if (cli_sock==INVALID_SOCKET)
        return -1;
 
    // connect to server
 
    srv_addr.sin_family = AF_INET;
    LPHOSTENT lphost = gethostbyname(server_name);
    if (lphost != NULL)
        srv_addr.sin_addr.s_addr = ((LPIN_ADDR)lphost->h_addr)->s_addr;
    srv_addr.sin_port= ntohs(80);
    if (connect(cli_sock,(LPSOCKADDR)&srv_addr,sizeof(srv_addr))==SOCKET_ERROR){
        return -1;
    }
 
    char sz[]="GET / HTTP/1.1\r\nHost:www.163.com\r\n\r\n";
    int retval = send(cli_sock,sz,sizeof(sz)-1,0);
    if( SOCKET_ERROR == retval )
        return 0;
    char buffer[1024]={0};
    while( SOCKET_ERROR != retval ){
        retval = recv(cli_sock ,buffer,1000,0);
        printf("%s\n",buffer);
    }
    closesocket(cli_sock);
    return 0;
}

VC6下运行可用。

对于http get请求报文格式说明。

如将下面的URL转化成GET请求报文：
 http://192.168.11.240/[email protected]

转换为：

GET(space)/[email protected](space)HTTP/1.1(\r\n) 
Host:192.168.11.240(\r\n) 
Accept:*/*(\r\n) 
User-Agent:MSIE 6.00(\r\n) 
Connection:Keep-Alive(\r\n)