datachannel-sys 0.11.4

Native bindings to libdatachannel.
Documentation 
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/**
 * Copyright (c) 2019 Paul-Louis Ageneau
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "rtc/rtc.hpp"

#if RTC_ENABLE_WEBSOCKET

#include <atomic>
#include <chrono>
#include <iostream>
#include <memory>
#include <thread>

using namespace rtc;
using namespace std;

template <class T> weak_ptr<T> make_weak_ptr(shared_ptr<T> ptr) { return ptr; }

void test_websocket() {
	InitLogger(LogLevel::Debug);

	const string myMessage = "Hello world from libdatachannel";

	auto ws = std::make_shared<WebSocket>();

	// Certificate verification can be disabled
	// auto ws = std::make_shared<WebSocket>(WebSocket::Configuration{.disableTlsVerification =
	// true});

	ws->onOpen([wws = make_weak_ptr(ws), &myMessage]() {
		auto ws = wws.lock();
		if (!ws)
			return;
		cout << "WebSocket: Open" << endl;
		ws->send(myMessage);
	});

	ws->onClosed([]() { cout << "WebSocket: Closed" << endl; });

	std::atomic<bool> received = false;
	ws->onMessage([&received, &myMessage](variant<binary, string> message) {
		if (holds_alternative<string>(message)) {
			string str = std::move(get<string>(message));
			if ((received = (str == myMessage)))
				cout << "WebSocket: Received expected message" << endl;
			else
				cout << "WebSocket: Received UNEXPECTED message" << endl;
		}
	});

	ws->open("wss://echo.websocket.org:443/");

	int attempts = 10;
	while ((!ws->isOpen() || !received) && attempts--)
		this_thread::sleep_for(1s);

	if (!ws->isOpen())
		throw runtime_error("WebSocket is not open");

	if (!received)
		throw runtime_error("Expected message not received");

	ws->close();
	this_thread::sleep_for(1s);

	// You may call rtc::Cleanup() when finished to free static resources
	rtc::Cleanup();
	this_thread::sleep_for(1s);

	cout << "Success" << endl;
}

#endif