gistfile1.cpp

	void Win32DownloadUrl(const TString& url, std::vector<char>& out_responsePayload)
	{
		OutputDebugString(boost::str(boost::wformat(L"Win32DownloadUrl(inner)\r\n")).c_str()); 
		HINTERNET hINet = InternetOpen(TEXT("InetURL/1.0"), INTERNET_OPEN_TYPE_PRECONFIG, NULL, NULL, 0 ); //INTERNET_OPEN_TYPE_DIRECT INTERNET_OPEN_TYPE_PRECONFIG
		if (!hINet)
		{
			OutputDebugString(boost::str(boost::wformat(L"Win32DownloadUrl(inner): couldn't fetch URL\r\n")).c_str()); 

			DWORD lastError = GetLastError();
			OutputDebugString(boost::str(boost::wformat(L"...GetLastError=%1%\r\n")%lastError).c_str()); 
			
			DWORD error; 
			std::vector<wchar_t> buffer(1000); 
			DWORD size = buffer.size();
			BOOL retval = InternetGetLastResponseInfo(&error, &buffer[0], &size);
			assert(retval == TRUE);
			OutputDebugString(boost::str(boost::wformat(L"...InternetGetLastResponseInfo=%1%\r\n")%(&buffer[0])).c_str()); 

			throw boost::str(boost::wformat(L"Couldn't fetch URL: %1%\r\n") % url);
		}

		LPCTSTR headers = NULL;
		DWORD headersLen = 0;
		//DWORD dwFlags = 0;
		DWORD dwFlags = INTERNET_FLAG_NO_CACHE_WRITE|INTERNET_FLAG_NO_UI|INTERNET_FLAG_RELOAD|INTERNET_FLAG_NO_COOKIES;
		DWORD_PTR dwContext = 0;
		HINTERNET hFile = InternetOpenUrl( hINet, url.c_str(), headers, headersLen, dwFlags, dwContext);
		
		if (!hFile)
		{
			OutputDebugString(boost::str(boost::wformat(L"Win32DownloadUrl(inner): couldn't fetch URL\r\n")).c_str()); 

			DWORD lastError = GetLastError();
			OutputDebugString(boost::str(boost::wformat(L"...GetLastError=%1%\r\n")%lastError).c_str()); 
			
			DWORD error; 
			std::vector<wchar_t> buffer(1000); 
			DWORD size = buffer.size();
			BOOL retval = InternetGetLastResponseInfo(&error, &buffer[0], &size);
			assert(retval == TRUE);
			OutputDebugString(boost::str(boost::wformat(L"...InternetGetLastResponseInfo=%1%\r\n")%(&buffer[0])).c_str()); 

			InternetCloseHandle( hINet );
			OutputDebugString(boost::str(boost::wformat(L"Win32DownloadUrl(inner): couldn't fetch url\r\n")).c_str()); 
			throw boost::str(boost::wformat(L"Couldn't fetch URL: %1%") % url);
		}

		std::size_t response_i = 0;
		DWORD dwRead;
		while ( InternetReadFile( hFile, &out_responsePayload[response_i], 
			out_responsePayload.size() - response_i, &dwRead ) )
		{
			if ( dwRead == 0 )
				break; //um what if its not done
			response_i += dwRead;

			bool atCapacity = (0 == out_responsePayload.size() - response_i);
			if (atCapacity)
				out_responsePayload.resize(2 * out_responsePayload.size());
		}
		InternetCloseHandle( hFile );
		InternetCloseHandle( hINet );
		OutputDebugString(boost::str(boost::wformat(L"Win32DownloadUrl(inner): succeeded")).c_str()); 
	}