Method Connect

src/network/core/http_winhttp.cpp:213–259

* Start the HTTP request handling. * * This is done in an async manner, so we can do other things while waiting for * the HTTP request to finish. The actual receiving of the data is done in * Receive(). */

 * Receive().
 */
void NetworkHTTPRequest::Connect()
{
	Debug(net, 1, "HTTP request to {}", std::string(uri.begin(), uri.end()));

	URL_COMPONENTS url_components = {};
	wchar_t scheme[32];
	wchar_t hostname[128];
	wchar_t url_path[4096];

	/* Convert the URL to its components. */
	url_components.dwStructSize = sizeof(url_components);
	url_components.lpszScheme = scheme;
	url_components.dwSchemeLength = static_cast<DWORD>(std::size(scheme));
	url_components.lpszHostName = hostname;
	url_components.dwHostNameLength = static_cast<DWORD>(std::size(hostname));
	url_components.lpszUrlPath = url_path;
	url_components.dwUrlPathLength = static_cast<DWORD>(std::size(url_path));
	WinHttpCrackUrl(this->uri.c_str(), 0, 0, &url_components);

	/* Create the HTTP connection. */
	this->connection = WinHttpConnect(_winhttp_session, url_components.lpszHostName, url_components.nPort, 0);
	if (this->connection == nullptr) {
		Debug(net, 0, "HTTP request failed: {}", GetLastErrorAsString());
		this->callback.OnFailure();
		this->finished = true;
		return;
	}

	this->request = WinHttpOpenRequest(connection, data.empty() ? L"GET" : L"POST", url_components.lpszUrlPath, nullptr, WINHTTP_NO_REFERER, WINHTTP_DEFAULT_ACCEPT_TYPES, url_components.nScheme == INTERNET_SCHEME_HTTPS ? WINHTTP_FLAG_SECURE : 0);
	if (this->request == nullptr) {
		WinHttpCloseHandle(this->connection);

		Debug(net, 0, "HTTP request failed: {}", GetLastErrorAsString());
		this->callback.OnFailure();
		this->finished = true;
		return;
	}

	/* Send the request (possibly with a payload). */
	if (data.empty()) {
		WinHttpSendRequest(this->request, WINHTTP_NO_ADDITIONAL_HEADERS, 0, WINHTTP_NO_REQUEST_DATA, 0, 0, reinterpret_cast<DWORD_PTR>(this));
	} else {
		/* When the payload starts with a '{', it is a JSON payload. */
		LPCWSTR content_type = data.starts_with("{") ? L"Content-Type: application/json\r\n" : L"Content-Type: application/x-www-form-urlencoded\r\n";
		WinHttpSendRequest(this->request, content_type, -1, const_cast<char *>(data.data()), static_cast<DWORD>(data.size()), static_cast<DWORD>(data.size()), reinterpret_cast<DWORD_PTR>(this));
	}
}

/**
 * Poll and process the HTTP request/response.