// Called when the timer expires.
// We operate the timer continuously this simplifies the code.
//
void on_timer(error_code ec)
{
if(ec && ec != boost::asio::error::operation_aborted)
return fail("timer", ec);
// Verify that the timer really expired
// since the deadline may have moved.
//
if(timer_.expires_at() <= clock_type::now())
{
// Closing the socket cancels all outstanding
// operations. They will complete with
// boost::asio::error::operation_aborted
//
ws_.next_layer().close(ec);
return;
}
// Wait on the timer
timer_.async_wait(
strand_.wrap(std::bind(
&connection::on_timer,
shared_from_this(),
std::placeholders::_1)));
}
void accept()
{
// Clean up any previous connection.
boost::beast::error_code ec;
socket_.close(ec);
buffer_.consume(buffer_.size());
acceptor_.async_accept(
socket_,
[this](boost::beast::error_code ec)
{
if (ec)
{
accept();
}
else
{
// Request must be fully processed within 60 seconds.
request_deadline_.expires_after(
std::chrono::seconds(60));
read_request();
}
});
}
void
onTimer (boost::system::error_code ec)
{
if (ec)
{
if (ec != boost::asio::error::operation_aborted)
journal_.error <<
"onTimer: " << ec.message();
return;
}
logic_.onTimer();
timer_.expires_from_now(std::chrono::seconds(1), ec);
timer_.async_wait(strand_.wrap(exec_.wrap(
std::bind(&ManagerImp::onTimer, this,
beast::asio::placeholders::error))));
}
void onStop()
{
boost::system::error_code ec;
timer_.cancel(ec);
logic_.stop();
exec_.async_wait([this]() { stopped(); });
}
void check_deadline()
{
// The deadline may have moved, so check it has really passed.
if (request_deadline_.expiry() <= std::chrono::steady_clock::now())
{
// Close socket to cancel any outstanding operation.
boost::beast::error_code ec;
socket_.close();
// Sleep indefinitely until we're given a new deadline.
request_deadline_.expires_at(
std::chrono::steady_clock::time_point::max());
}
request_deadline_.async_wait(
[this](boost::beast::error_code)
{
check_deadline();
});
}
// Read a message from the websocket stream
void do_read()
{
// Put the read on the timer
timer_.expires_from_now(std::chrono::seconds(15));
// Read a message
ws_.async_read(buffer_,
strand_.wrap(std::bind(
&connection::on_read,
shared_from_this(),
std::placeholders::_1)));
}
// Called immediately after the connection is created.
// We keep this separate from the constructor because
// shared_from_this may not be called from constructors.
void run()
{
// Run the timer
on_timer({});
// Put the handshake on the timer
timer_.expires_from_now(std::chrono::seconds(15));
// Read the websocket handshake and send the response
ws_.async_accept_ex(
[](websocket::response_type& res)
{
res.insert(http::field::server, "websocket-server-async");
},
strand_.wrap(std::bind(
&connection::on_accept,
shared_from_this(),
std::placeholders::_1)));
}
// Called after the message read completes
void on_read(error_code ec)
{
// This error means the other side
// closed the websocket stream.
if(ec == websocket::error::closed)
return;
if(ec)
return fail("read", ec);
// Put the write on the timer
timer_.expires_from_now(std::chrono::seconds(15));
// Write the received message back
ws_.binary(ws_.got_binary());
ws_.async_write(buffer_.data(),
strand_.wrap(std::bind(
&connection::on_write,
shared_from_this(),
std::placeholders::_1)));
}