winhttp简单用法（1）--header

#include <string>

#include <iostream>

#include <windows.h>

#include <winhttp.h> 

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

#pragma comment(lib,"user32.lib")





void main()

{



	

    DWORD dwSize = 0;

	LPVOID lpOutBuffer = NULL;

	HINTERNET  hSession = NULL,

			   hConnect = NULL,

			   hRequest = NULL;



	BOOL  bResults = FALSE;



	hSession=WinHttpOpen(L"User Agent",WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,WINHTTP_NO_PROXY_NAME,WINHTTP_NO_PROXY_BYPASS,0);



	if(hSession)

	{

		hConnect=WinHttpConnect(hSession,L"192.168.0.8",INTERNET_DEFAULT_HTTP_PORT,0);

	}



	if(hConnect)

	{

		hRequest=WinHttpOpenRequest(hConnect, L"GET",L"login.html",L"HTTP/1.1", WINHTTP_NO_REFERER,WINHTTP_DEFAULT_ACCEPT_TYPES,0);

	}



	if(hRequest)

	{

		bResults=WinHttpSendRequest(hRequest,WINHTTP_NO_ADDITIONAL_HEADERS, 0,WINHTTP_NO_REQUEST_DATA, 0, 0, 0 );

	}



	if(bResults)

	{

		bResults=WinHttpReceiveResponse(hRequest,NULL);



	}



	

	if(bResults)

	{

		bResults=WinHttpQueryHeaders(hRequest,WINHTTP_QUERY_RAW_HEADERS_CRLF, WINHTTP_HEADER_NAME_BY_INDEX,NULL,&dwSize,WINHTTP_NO_HEADER_INDEX);



		if( GetLastError( ) == ERROR_INSUFFICIENT_BUFFER)

		{

			lpOutBuffer = new WCHAR[dwSize/sizeof(WCHAR)];

			

			bResults = WinHttpQueryHeaders(hRequest,WINHTTP_QUERY_RAW_HEADERS_CRLF,WINHTTP_HEADER_NAME_BY_INDEX, lpOutBuffer, &dwSize,WINHTTP_NO_HEADER_INDEX);

		}

	}

	

	if(bResults)

	{

		printf("Header contents: \n%S",lpOutBuffer);

	}

	

	delete [] lpOutBuffer;



    if (hRequest) WinHttpCloseHandle(hRequest);

    if (hConnect) WinHttpCloseHandle(hConnect);

    if (hSession) WinHttpCloseHandle(hSession);



	



	 system("pause");





}