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// license:Boost
// copyright-holders:Christopher M. Kohlhoff
#include "server.hpp"
#include <signal.h>
#include <utility>
namespace http {
namespace server {
server::server(const std::string& address, const std::string& port, const std::string& doc_root)
: m_io_context(1),
m_signals(m_io_context),
m_acceptor(m_io_context),
m_connection_manager(),
m_request_handler(doc_root)
{
// Register to handle the signals that indicate when the server should exit.
// It is safe to register for the same signal multiple times in a program,
// provided all registration for the specified signal is made through Asio.
m_signals.add(SIGINT);
m_signals.add(SIGTERM);
#if defined(SIGQUIT)
signals_.add(SIGQUIT);
#endif // defined(SIGQUIT)
do_await_stop();
// Open the acceptor with the option to reuse the address (i.e. SO_REUSEADDR).
asio::ip::tcp::resolver resolver(m_io_context);
asio::ip::tcp::endpoint endpoint =
*resolver.resolve(address, port).begin();
m_acceptor.open(endpoint.protocol());
m_acceptor.set_option(asio::ip::tcp::acceptor::reuse_address(true));
m_acceptor.bind(endpoint);
m_acceptor.listen();
do_accept();
}
void server::run()
{
// The io_context::run() call will block until all asynchronous operations
// have finished. While the server is running, there is always at least one
// asynchronous operation outstanding: the asynchronous accept call waiting
// for new incoming connections.
m_io_context.run();
}
void server::do_accept()
{
m_acceptor.async_accept(
[this](std::error_code ec, asio::ip::tcp::socket socket)
{
// Check whether the server was stopped by a signal before this
// completion handler had a chance to run.
if (!m_acceptor.is_open())
{
return;
}
if (!ec)
{
m_connection_manager.start(std::make_shared<connection>(
std::move(socket), m_connection_manager, m_request_handler));
}
do_accept();
});
}
void server::do_await_stop()
{
m_signals.async_wait(
[this](std::error_code /*ec*/, int /*signo*/)
{
// The server is stopped by cancelling all outstanding asynchronous
// operations. Once all operations have finished the io_context::run()
// call will exit.
m_acceptor.close();
m_connection_manager.stop_all();
});
}
} // namespace server
} // namespace http
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