Method OnFailure

src/network/core/http_shared.h:39–43

* Similar to HTTPCallback::OnFailure, but thread-safe. */

	 * Similar to HTTPCallback::OnFailure, but thread-safe.
	 */
	void OnFailure()
	{
		std::lock_guard<std::mutex> lock(this->mutex);
		this->queue.emplace_back();
	}

	/**
	 * Similar to HTTPCallback::OnReceiveData, but thread-safe.