Method Download

WinArk/SymbolFileInfo.cpp:93–227

}

downslib_error SymbolFileInfo::Download(std::string url, std::wstring fileName, std::string userAgent,
	unsigned int timeout,downslib_cb cb, void* userdata){
	HINTERNET hInternet = nullptr;
	HINTERNET hUrl = nullptr;
	HANDLE hFile = nullptr;
	HINTERNET hConnect = nullptr;

	Cleanup cleanup([&]()
	{
		DWORD lastError = ::GetLastError();
		if (hFile != INVALID_HANDLE_VALUE) {
			bool doDelete = false;
			LARGE_INTEGER fileSize;
			if (lastError != ERROR_SUCCESS || (::GetFileSizeEx(hFile, &fileSize) && fileSize.QuadPart == 0)) {
				doDelete = true;
			}
			::CloseHandle(hFile);
			if (doDelete)
				DeleteFile(fileName.c_str());
		}
		if (hUrl != nullptr)
			::InternetCloseHandle(hUrl);
		if (hInternet != NULL)
			::InternetCloseHandle(hInternet);
		if (hConnect != nullptr)
			::InternetCloseHandle(hConnect);
		::SetLastError(lastError);
	});

	hFile = ::CreateFile(fileName.c_str(), GENERIC_WRITE | FILE_READ_ATTRIBUTES, 0, nullptr, CREATE_ALWAYS, 0, nullptr);
	if (hFile == INVALID_HANDLE_VALUE)
		return downslib_error::createfile;

	hInternet = ::InternetOpenA(userAgent.c_str(), INTERNET_OPEN_TYPE_PRECONFIG,
		nullptr, nullptr, 0);
	

	if (!hInternet)
		return downslib_error::inetopen;

	DWORD flags;
	DWORD len = sizeof(flags);
	
	::InternetSetOptionA(hInternet, INTERNET_OPTION_RECEIVE_TIMEOUT, &timeout, sizeof(timeout));
	flags = INTERNET_FLAG_RELOAD;
	if (strncmp(url.c_str(), "https://", 8) == 0)
		flags |= INTERNET_FLAG_SECURE;

	hUrl = InternetOpenUrlA(hInternet, url.c_str(), nullptr, 0, flags, 0);
	DWORD error = ::GetLastError();
	if (error == ERROR_INTERNET_INVALID_CA) {
		std::string serviceName = "msdl.microsoft.com";
		// Connect to the http server
		hConnect = InternetConnectA(hInternet, serviceName.c_str(),
			INTERNET_DEFAULT_HTTP_PORT, nullptr,
			nullptr, INTERNET_SERVICE_HTTP, 0, 0);
		int pos = url.find(".com") + 4;
		std::string objName(url.begin() + pos, url.end());