#include "stdafx.h"
#include <windows.h>
#include <iostream>
#include "Wininet.h"
#pragma comment(lib,"Wininet.lib")

using std::cout;
using std::endl;

//模擬瀏覽器發送HTTP請求函數
std::string HttpRequest(char * lpHostName, short sPort, char * lpUrl, char * lpMethod, char * lpPostData, int
 
 nPostDataLen)
{
HINTERNET hInternet, hConnect, hRequest;

BOOL bRet;

std::string strResponse;

hInternet = NULL;
hConnect = NULL;
hRequest = NULL;

hInternet = (HINSTANCE)InternetOpen("User-Agent", INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
if (!hInternet)
goto Ret0;

hConnect = (HINSTANCE)InternetConnect(hInternet, lpHostName, sPort, NULL, "
 
HTTP/1.1", INTERNET_SERVICE_HTTP, 0, 0);
if (!hConnect)
goto Ret0;

hRequest = (HINSTANCE)HttpOpenRequest(hConnect, lpMethod, lpUrl, "HTTP/1.1", NULL, NULL, INTERNET_FLAG_RELOAD, 0);
if (!hRequest)
goto Ret0;

//bRet = HttpAddRequestHeaders(hRequest,"Content-Type: application/x-www-form-urlencoded",Len(FORMHEADERS),HTTP_ADDREQ_FLAG_REPLACE | HTTP_ADDREQ_FLAG_ADD);
 
//if(!bRet)
//goto Ret0;

bRet = HttpSendRequest(hRequest, NULL, 0, lpPostData, nPostDataLen);
while (TRUE)
{
char cReadBuffer[4096];
unsigned long lNumberOfBytesRead;
bRet = InternetReadFile(hRequest, cReadBuffer, sizeof(cReadBuffer) - 1, &lNumberOfBytesRead);
if (!bRet || !lNumberOfBytesRead)
break;
cReadBuffer[lNumberOfBytesRead] = 0;
strResponse = strResponse + cReadBuffer;
}

Ret0:
if (hRequest)
InternetCloseHandle(hRequest);
if (hConnect)
InternetCloseHandle(hConnect);
if (hInternet)
InternetCloseHandle(hInternet);

return strResponse;
}

這是一個函數，只要調用這個函數，就可以獲取網頁的內容

調用方法

int main()
{
	//CString strResponse = HttpRequest("translate.google.com",80,"/translate_t?langpair=en|zh-CN","POST","hl=zh-CN&ie=UTF-8&text=this is me&langpair=en|zh-CN",strlen("hl=zh-CN&ie=UTF-8&text=this is me&langpair=en|zh-CN"));
	std::string strResponse = HttpRequest("www.qsxck.com", 80, "/", "GET", NULL, 0);
	
	//cout << strResponse.c_str();
	
	FILE * fp;
	errno_t t =  fopen_s(&fp,"D:\\old.html", "w");
	
	fwrite(strResponse.c_str(),1, strResponse.length(), fp);

	fclose(fp);
	getchar();
    return 0;
}

【C++】純C++實現http打開網頁下載內容的功能