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WinInet を使ってフォームの POST 要求をシミュレートする方法

MFC WinInet クラスを使用する場合

   CString strHeaders =
      _T("Content-Type: application/x-www-form-urlencoded");
   // URL-encoded form variables -
   // name = "John Doe", userid = "hithere", other = "P&Q"
   CString strFormData = _T("name=John+Doe&userid=hithere&other=P%26Q");

   CInternetSession session;
   CHttpConnection* pConnection =
      session.GetHttpConnection(_T("ServerNameHere"));
   CHttpFile* pFile =
      pConnection->OpenRequest(CHttpConnection::HTTP_VERB_POST,
                              _T("FormActionHere"));
   BOOL result = pFile->SendRequest(strHeaders,
      (LPVOID)(LPCTSTR)strFormData, strFormData.GetLength());

MFC を使用しない場合

   static TCHAR hdrs[] =
      _T("Content-Type: application/x-www-form-urlencoded");
   static TCHAR frmdata[] =
      _T("name=John+Doe&userid=hithere&other=P%26Q");
   statuc TCHAR accept[] =
      _T("Accept: */*");

   // for clarity, error-checking has been removed
   HINTERNET hSession = InternetOpen("MyAgent",
      INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0);
   HINTERNET hConnect = InternetConnect(hSession, _T("ServerNameHere"),
      INTERNET_DEFAULT_HTTP_PORT, NULL, NULL, INTERNET_SERVICE_HTTP, 0, 1);
   HINTERNET hRequest = HttpOpenRequest(hConnect, "POST",
      _T("FormActionHere"), NULL, NULL, accept, 0, 1);
   HttpSendRequest(hRequest, hdrs, strlen(hdrs), frmdata, strlen(frmdata));
   // close any valid internet-handles

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