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/***
This file is part of snapcast
Copyright (C) 2014-2025 Johannes Pohl
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#pragma once
// local headers
#include "stream_session.hpp"
// 3rd party headers
#include <boost/asio/strand.hpp>
#include <boost/beast/core.hpp>
#include <boost/beast/websocket.hpp>
#ifdef HAS_OPENSSL
#include <boost/beast/ssl.hpp>
#endif
// standard headers
namespace beast = boost::beast; // from <boost/beast.hpp>
namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
using tcp_socket = boost::asio::ip::tcp::socket;
using tcp_websocket = websocket::stream<tcp_socket>;
#ifdef HAS_OPENSSL
using ssl_socket = boost::asio::ssl::stream<tcp_socket>;
using ssl_websocket = websocket::stream<ssl_socket>;
#endif
/// Endpoint for a connected control client.
/**
* Endpoint for a connected control client.
* Messages are sent to the client with the "send" method.
* Received messages from the client are passed to the ControlMessageReceiver callback
*/
class StreamSessionWebsocket : public StreamSession
{
public:
#ifdef HAS_OPENSSL
/// c'tor for SSL. Received message from the client are passed to StreamMessageReceiver
StreamSessionWebsocket(StreamMessageReceiver* receiver, const ServerSettings& server_settings, ssl_websocket&& ssl_ws);
#endif
/// c'tor for TCP
StreamSessionWebsocket(StreamMessageReceiver* receiver, const ServerSettings& server_settings, tcp_websocket&& tcp_ws);
~StreamSessionWebsocket() override;
void start() override;
void stop() override;
std::string getIP() override;
private:
/// Send message @p buffer and pass result to @p handler
void sendAsync(const shared_const_buffer& buffer, WriteHandler&& handler) override;
/// Read callback
void on_read_ws(beast::error_code ec, std::size_t bytes_transferred);
/// Read loop
void do_read_ws();
std::optional<tcp_websocket> tcp_ws_; ///< TCP websocket
#ifdef HAS_OPENSSL
std::optional<ssl_websocket> ssl_ws_; ///< SSL websocket
#endif
beast::flat_buffer buffer_; ///< read buffer
bool is_ssl_; ///< are we in SSL mode?
};
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