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| #include "stdafx.h"
#include <winhttp.h>
#pragma comment(lib, "winhttp")
using namespace std;
void do_work();
int _tmain(int argc, _TCHAR* argv[])
{
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
do_work();
}
void do_work()
{
DWORD dwSize = 0;
DWORD dwDownloaded = 0;
LPSTR pszOutBuffer;
BOOL bResults = FALSE;
HINTERNET hSession = NULL,
hConnect = NULL,
hRequest = NULL;
// Use WinHttpOpen to obtain a session handle.
hSession = WinHttpOpen(L"A WinHTTP Example Program/1.0",
WINHTTP_ACCESS_TYPE_DEFAULT_PROXY,
WINHTTP_NO_PROXY_NAME,
WINHTTP_NO_PROXY_BYPASS, 0);
// Specify an HTTP server
if (hSession)
hConnect = WinHttpConnect(hSession, L"baidu.com",
INTERNET_DEFAULT_HTTP_PORT, 0);
// Create an HTTP Request handle.
if (hConnect)
hRequest = WinHttpOpenRequest(hConnect, L"GET",
L"",
NULL, WINHTTP_NO_REFERER,
WINHTTP_DEFAULT_ACCEPT_TYPES,
0);
// Send a Request.
if (hRequest)
bResults = WinHttpSendRequest(hRequest,
WINHTTP_NO_ADDITIONAL_HEADERS,
0, WINHTTP_NO_REQUEST_DATA, 0,
0, 0);
// End the request.
if (bResults)
bResults = WinHttpReceiveResponse(hRequest, NULL);
// Continue to verify data until there is nothing left.
if (bResults)
{
do
{
// Verify available data.
dwSize = 0;
if (!WinHttpQueryDataAvailable(hRequest, &dwSize))
printf("Error %u in WinHttpQueryDataAvailable.\n",
GetLastError());
// Allocate space for the buffer.
pszOutBuffer = new char[dwSize+1];
// Read the Data.
ZeroMemory(pszOutBuffer, dwSize+1);
if (!WinHttpReadData(hRequest, (LPVOID)pszOutBuffer,
dwSize, &dwDownloaded))
printf("Error %u in WinHttpReadData.\n", GetLastError());
else
printf("%s\n", pszOutBuffer);
// Free the memory allocated to the buffer.
delete[] pszOutBuffer;
} while (dwSize > 0);
}
// Report errors.
if (!bResults)
printf("Error %d has occurred.\n", GetLastError());
// Close open handles.
if (hRequest) WinHttpCloseHandle(hRequest);
if (hConnect) WinHttpCloseHandle(hConnect);
if (hSession) WinHttpCloseHandle(hSession);
}
|