#include<iostream>
#include <WINSOCK2.H>
#pragma comment(lib,"ws2_32.lib")
#define LEN 1024 //接收數(shù)據(jù)的大小
using namespace std;
 
 
int main()
{
 //加載套接字庫
 WORD wVersionRequested;
 WSADATA wsaData;
 int err;
 
 wVersionRequested = MAKEWORD( 1, 1 );  //初始化Socket動態(tài)連接庫,請求1.1版本的winsocket庫
 
 err = WSAStartup( wVersionRequested, &wsaData );
 if ( err != 0 ) {
 return 0;
 }
 
 if ( LOBYTE( wsaData.wVersion ) != 1 ||  //判斷請求的winsocket是不是1.1的版本
    HIBYTE( wsaData.wVersion ) != 1 ) {
 WSACleanup( );  //清盤
 return 0;   //終止對winsocket使用
 }
 //WSADATA ws;
 //WSAStartup(MAKEWORD(2,2),&ws);//
 char http[60] = "www.google.com";  //訪問谷歌網(wǎng)頁
 SOCKET sock = socket(AF_INET,SOCK_STREAM,0);//建立socket
 if (sock == INVALID_SOCKET)
 {
 cout<<"建立訪問socket套接字失敗!"<<endl;
 return 0;
 }
 sockaddr_in hostadd;
 hostent* host = gethostbyname(http);//取得主機的IP地址
 if(host==NULL)
 {
 cout<<"主機處于沒有聯(lián)網(wǎng)狀態(tài);"<<endl;
 return 0;
 }
 cout<<"主機處于聯(lián)網(wǎng)狀態(tài)，現(xiàn)在可以進行通信!"<<endl;
 memcpy(&hostadd,host->h_addr,sizeof(hostadd));//將返回的IP信息Copy到地址結構
 hostadd.sin_family = AF_INET;
 hostadd.sin_port = htons(80);
 
 
 char buf[LEN]="GET / HTTP/1.1\r\nHost: ";//構造Http請求數(shù)據(jù)包
 strcat(buf,inet_ntoa(hostadd.sin_addr));
 strcat(buf," \r\nContent-Length: 10\r\n\r\n");
 strcat(buf,"Connection:close");
 
 
 int time = 1000; //超時時間
 setsockopt(sock,SOL_SOCKET,SO_RCVTIMEO,(char*)&time,sizeof(time));
 
 
 if (connect(sock,(sockaddr*)&hostadd,sizeof(hostadd)) == SOCKET_ERROR)//連接請求
 {
 cout<<"與網(wǎng)頁建立連接失敗!"<<endl;
 return 0;
 }
 if (SOCKET_ERROR == send(sock,buf,strlen(buf)+1,0))//發(fā)送構造好的Http請求包
 {
 cout<<"發(fā)送數(shù)據(jù)包失敗!"<<endl;
 return 0;
 }
 memset(buf,0,LEN);
 recv(sock,buf,LEN,0);  //接收返回的數(shù)據(jù)
 cout<<"從網(wǎng)頁中獲取的數(shù)據(jù)為:"<<buf;
 closesocket(sock);
 WSACleanup();
return 0;
}