winnet api 实现Get请求

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#include <windows.h>
#include <WinInet.h>
#include <string>

using namespace std;

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

char* GetUrl2(const char* strName,char* strObject)
{
	HINTERNET hSession = ::InternetOpen("MSDN SurfBear", 
		PRE_CONFIG_INTERNET_ACCESS, 
		NULL, 
		INTERNET_INVALID_PORT_NUMBER, 
		0) ; 

	// Connect to www.microsoft.com. 
	HINTERNET hConnect = ::InternetConnect(hSession, 
		strName, 
		INTERNET_INVALID_PORT_NUMBER, 
		"", 
		"", 
		INTERNET_SERVICE_HTTP, 
		0, 
		0) ; 

	// Request the file /MSDN/MSDNINFO/ from the server. 
	HINTERNET hHttpFile = ::HttpOpenRequest(hConnect, 
		"GET", 
		strObject,
		HTTP_VERSION, 
		NULL, 
		0, 
		INTERNET_FLAG_DONT_CACHE, 
		1); 

	// Send the request. 
	BOOL bSendRequest = ::HttpSendRequest(hHttpFile, NULL, 0, 0, 0); 

	// Get the length of the file. 
	char bufQuery[32] ; 
	DWORD dwLengthBufQuery = sizeof(bufQuery); 
	BOOL bQuery = ::HttpQueryInfo(hHttpFile, HTTP_QUERY_CONTENT_LENGTH,bufQuery,&dwLengthBufQuery,NULL) ; 

	// Convert length from ASCII string to a DWORD. 
	DWORD dwFileSize = (DWORD)atol(bufQuery) ; 

	if (dwFileSize <= 2)
	{
		return 0;
	}
	// Allocate a buffer for the file. 
	char* buffer = new char[dwFileSize+1] ; 

	ZeroMemory(buffer,0,sizeof(buffer));

	// Read the file into the buffer. 
	DWORD dwBytesRead ; 
	BOOL bRead = ::InternetReadFile(hHttpFile, 
		buffer, 
		dwFileSize+1, 
		&dwBytesRead); 
	// Put a zero on the end of the buffer. 
	buffer[dwBytesRead] = 0 ;

	return buffer;
}

 

 

调用 GetUrl2("www.hao123.com","/task.asp?uid=123");