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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/>.
***/
// prototype/interface header file
#include "control_session_ws.hpp"
// local headers
#include "common/aixlog.hpp"
// 3rd party headers
// standard headers
#include <iostream>
using namespace std;
static constexpr auto LOG_TAG = "ControlSessionWS";
ControlSessionWebsocket::ControlSessionWebsocket(ControlMessageReceiver* receiver, ssl_websocket&& ssl_ws, const ServerSettings& settings)
: ControlSession(receiver, settings), ssl_ws_(std::move(ssl_ws)), strand_(boost::asio::make_strand(ssl_ws_->get_executor())), is_ssl_(true)
{
LOG(DEBUG, LOG_TAG) << "ControlSessionWebsocket, mode: ssl\n";
}
ControlSessionWebsocket::ControlSessionWebsocket(ControlMessageReceiver* receiver, tcp_websocket&& tcp_ws, const ServerSettings& settings)
: ControlSession(receiver, settings), tcp_ws_(std::move(tcp_ws)), strand_(boost::asio::make_strand(tcp_ws_->get_executor())), is_ssl_(false)
{
LOG(DEBUG, LOG_TAG) << "ControlSessionWebsocket, mode: tcp\n";
}
ControlSessionWebsocket::~ControlSessionWebsocket()
{
LOG(DEBUG, LOG_TAG) << "ControlSessionWebsocket::~ControlSessionWebsocket()\n";
stop();
}
void ControlSessionWebsocket::start()
{
// Read a message
do_read_ws();
}
void ControlSessionWebsocket::stop()
{
// if (ws_.is_open())
// {
// boost::beast::error_code ec;
// ws_.close(beast::websocket::close_code::normal, ec);
// if (ec)
// LOG(ERROR, LOG_TAG) << "Error in socket close: " << ec.message() << "\n";
// }
}
void ControlSessionWebsocket::sendAsync(const std::string& message)
{
boost::asio::post(strand_, [this, self = shared_from_this(), msg = message]() mutable
{
messages_.push_back(std::move(msg));
if (messages_.size() > 1)
{
LOG(DEBUG, LOG_TAG) << "HTTP session outstanding async_writes: " << messages_.size() << "\n";
return;
}
send_next();
});
}
void ControlSessionWebsocket::send_next()
{
const std::string& message = messages_.front();
auto write_handler = [this, self = shared_from_this()](std::error_code ec, std::size_t length)
{
messages_.pop_front();
if (ec)
{
LOG(ERROR, LOG_TAG) << "Error while writing to web socket: " << ec.message() << "\n";
}
else
{
LOG(TRACE, LOG_TAG) << "Wrote " << length << " bytes to web socket\n";
}
if (!messages_.empty())
send_next();
};
if (is_ssl_)
{
ssl_ws_->async_write(boost::asio::buffer(message), [write_handler](std::error_code ec, std::size_t length) { write_handler(ec, length); });
}
else
{
tcp_ws_->async_write(boost::asio::buffer(message), [write_handler](std::error_code ec, std::size_t length) { write_handler(ec, length); });
}
}
void ControlSessionWebsocket::do_read_ws()
{
// Read a message into our buffer
if (is_ssl_)
ssl_ws_->async_read(buffer_,
[this, self = shared_from_this()](beast::error_code ec, std::size_t bytes_transferred) { on_read_ws(ec, bytes_transferred); });
else
tcp_ws_->async_read(buffer_,
[this, self = shared_from_this()](beast::error_code ec, std::size_t bytes_transferred) { on_read_ws(ec, bytes_transferred); });
}
void ControlSessionWebsocket::on_read_ws(beast::error_code ec, std::size_t bytes_transferred)
{
// This indicates that the session was closed
if (ec == websocket::error::closed)
return;
if (ec)
{
LOG(ERROR, LOG_TAG) << "ControlSessionWebsocket::on_read_ws error: " << ec.message() << "\n";
return;
}
std::string line{boost::beast::buffers_to_string(buffer_.data())};
if (!line.empty())
{
// LOG(DEBUG, LOG_TAG) << "received: " << line << "\n";
if (message_receiver_ != nullptr)
{
message_receiver_->onMessageReceived(shared_from_this(), line, [this](const std::string& response)
{
if (!response.empty())
{
sendAsync(response);
}
});
}
}
buffer_.consume(bytes_transferred);
do_read_ws();
}
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