http传输.cpp

TCP一个简单应用,功能不完善,刚学的, 运用一下刚学的知识

#include<Winsock2.h>
#include<iostream>
using namespace std;
#pragma comment(lib,"ws2_32.lib")
#define MAXLENTH 100
void SendString(SOCKET sock,LPCSTR str);

void main()
{
	WSADATA ws;
	//使用的套接字
	SOCKET s;
	//HTTP 服务器地址
	struct sockaddr_in addr;
	//下载的文件名
	char filename[MAXLENTH];
	int iResult;
	long lResult;
	char strSubAddr[1000],strBuffer[10000];
	//创建一个流式Socket
	lResult = WSAStartup(MAKEWORD(2,2),&ws);
	s = socket(AF_INET,SOCK_STREAM,0);
	addr.sin_family = AF_INET;
	//使用http的端口80
	addr.sin_port = htons(80);
	//地址转换
	addr.sin_addr.S_un.S_addr = inet_addr("220.181.3.20");
	//
	iResult = connect(s,(struct sockaddr*)&addr,sizeof(addr));
	if(iResult == SOCKET_ERROR)
	{
		//连接失败
		cout << "连接失败！"<< WSAGetLastError();
		WSACleanup();	
	}
	else
	{
		//连接成功
		//使用Get命令取根目录下的文件
		strcpy(strSubAddr,"GET/HTTP/1.1\r\n Host:www.hao123.com\r\nAccept: txt/html\r\nUser-Agent: Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)\r\nConnection:Keep-Alive\r\n\r\n");
	  //strcpy(strSubAddr,"GET / HTTP/1.1\r\nHost:www.hao123.com\r\n Accept: txt/html\r\nUser-Agent: Mozilla/4.0compatible; MSIE 5.00; Windows 98)\r\nConnection:Keep-Alive\r\n\r\n");
			//1.1 Host:www.sina.com.cn Accept:*/* User-Agent:Mozilla/4.0 (compatible; MSIE 5.00; Windows NT) Connection:Keep-Alive");
	   /*SendString(s,"GET / HTTP/1.1\r\n");
       SendString(s,"Host:www.hao123.com\r\n");
       SendString(s,"Accept: txt/html\r\n");
       SendString(s,"User-Agent: Mozilla/4.0");
       SendString(s,"(compatible; MSIE 5.00; Windows 98)\r\n");
       SendString(s,"Connection:Keep-Alive\r\n");
       SendString(s,"\r\n");
       SendString(s,"\r\n");//最后要加空行*/
		//strcpy(filename,"index.html");
		iResult = send(s,strSubAddr,strlen(strSubAddr),0);
        if(iResult == SOCKET_ERROR)
	    {
		   //连接失败
		   cout << "失败！"<< WSAGetLastError();
		   WSACleanup();	
	    }
		//下载文件
		strset(strBuffer,' ');
		do
		{//cout << "hello1" ;
			
			//cout << "hello2" ;
			
			iResult = recv(s,strBuffer,sizeof(strBuffer),0);
			if(iResult == SOCKET_ERROR)
	        {
		         //连接失败
		         cout << "接受失败！"<< WSAGetLastError()<<endl;
		         WSACleanup();	
	        }		
    		//cout << "hello3";
			//cout << strBuffer;
		}while(iResult != 0);
	}	
	cout << strBuffer <<endl;
	closesocket(s);
	WSACleanup();
}
void SendString(SOCKET sock,LPCSTR str)
{
    send(sock,str,strlen(str),0);
}