#include <WinSock2.h>

#include <iostream>

#include <string>

#include <fstream>

#pragma comment(lib, "ws2_32.lib")

using namespace std;

const int		g_nPort		= 80;

const string	g_strAddr	= "www.cnblogs.com";

const string	g_strPath	= "/hangj/";

int main(int argc, char* argv[])

{

	WSADATA	WSAData;

	if (WSAStartup(MAKEWORD(2,2), &WSAData)){

		printf("initializationing error!\n");

		WSACleanup();

		exit(-1);

	}

	struct hostent	*he;

	if ((he = gethostbyname(g_strAddr.c_str()))==NULL){

		printf("gethostbyname failed.\n");

		WSACleanup();

		exit(-1);

	}

	struct sockaddr_in		CliAddr = {0};

	CliAddr.sin_family		= AF_INET;

	CliAddr.sin_port		= htons(g_nPort);

	CliAddr.sin_addr		= *((struct in_addr*)he->h_addr_list[0]);

	cout <<"ip: "<< inet_ntoa(*(struct in_addr*)he->h_addr_list[0]) <<endl;

	int sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

	if (INVALID_SOCKET == sockfd){

		printf("socket failed.\n");

		WSACleanup();

		exit(-1);

	}

	if (0 > connect(sockfd, (struct sockaddr*)&CliAddr, sizeof(CliAddr))){

		printf("connect failed.\n");

		WSACleanup();

		exit(-1);

	}

	string strSend="";

	strSend += "GET " + g_strPath + " HTTP/1.1\n";	// URL

	strSend += "Host: " + g_strAddr + "\n\n";		// Host

	char bufSend[1024]={0};

	sprintf(bufSend, "%s", strSend.c_str());

	if (0 > send(sockfd, bufSend, strlen(bufSend), 0)){

		printf("send failed.\n");

		WSACleanup();

		exit(-1);

	}

	ofstream os("hangj.html");

	char bufRecv[10]={0};

	int nRet=0;

	printf("recv: \n");

	while (sizeof(bufRecv)-1 <= (nRet=recv(sockfd, bufRecv, sizeof(bufRecv)-1, 0))){

		bufRecv[nRet] = 0;

		printf("%s", bufRecv);

		os << bufRecv;

	}

	bufRecv[nRet] = 0;

	printf("%s\n", bufRecv);

	os << bufRecv;

	os.close();
　　　　　closesocket(sockfd);

	WSACleanup();

	getchar();

	return 0;

}