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/*
* Copyright (c) 2014, Peter Thorson. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of the WebSocket++ Project nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef WEBSOCKETPP_SERVER_ENDPOINT_HPP
#define WEBSOCKETPP_SERVER_ENDPOINT_HPP
#include <websocketpp/endpoint.hpp>
#include <websocketpp/logger/levels.hpp>
#include <websocketpp/common/system_error.hpp>
namespace websocketpp {
/// Server endpoint role based on the given config
/**
*
*/
template <typename config>
class server : public endpoint<connection<config>,config> {
public:
/// Type of this endpoint
typedef server<config> type;
/// Type of the endpoint concurrency component
typedef typename config::concurrency_type concurrency_type;
/// Type of the endpoint transport component
typedef typename config::transport_type transport_type;
/// Type of the connections this server will create
typedef connection<config> connection_type;
/// Type of a shared pointer to the connections this server will create
typedef typename connection_type::ptr connection_ptr;
/// Type of the connection transport component
typedef typename transport_type::transport_con_type transport_con_type;
/// Type of a shared pointer to the connection transport component
typedef typename transport_con_type::ptr transport_con_ptr;
/// Type of the endpoint component of this server
typedef endpoint<connection_type,config> endpoint_type;
friend class connection<config>;
explicit server() : endpoint_type(true)
{
endpoint_type::m_alog.write(log::alevel::devel, "server constructor");
}
/// Destructor
~server<config>() {}
#ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
// no copy constructor because endpoints are not copyable
server<config>(server<config> &) = delete;
// no copy assignment operator because endpoints are not copyable
server<config> & operator=(server<config> const &) = delete;
#endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
#ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
/// Move constructor
server<config>(server<config> && o) : endpoint<connection<config>,config>(std::move(o)) {}
#ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
// no move assignment operator because of const member variables
server<config> & operator=(server<config> &&) = delete;
#endif // _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
#endif // _WEBSOCKETPP_MOVE_SEMANTICS_
/// Create and initialize a new connection
/**
* The connection will be initialized and ready to begin. Call its start()
* method to begin the processing loop.
*
* Note: The connection must either be started or terminated using
* connection::terminate in order to avoid memory leaks.
*
* @return A pointer to the new connection.
*/
connection_ptr get_connection() {
return endpoint_type::create_connection();
}
/// Starts the server's async connection acceptance loop (exception free)
/**
* Initiates the server connection acceptance loop. Must be called after
* listen. This method will have no effect until the underlying io_service
* starts running. It may be called after the io_service is already running.
*
* Refer to documentation for the transport policy you are using for
* instructions on how to stop this acceptance loop.
*
* @param [out] ec A status code indicating an error, if any.
*/
void start_accept(lib::error_code & ec) {
if (!transport_type::is_listening()) {
ec = error::make_error_code(error::async_accept_not_listening);
return;
}
ec = lib::error_code();
connection_ptr con = get_connection();
transport_type::async_accept(
lib::static_pointer_cast<transport_con_type>(con),
lib::bind(&type::handle_accept,this,con,lib::placeholders::_1),
ec
);
if (ec && con) {
// If the connection was constructed but the accept failed,
// terminate the connection to prevent memory leaks
con->terminate(lib::error_code());
}
}
/// Starts the server's async connection acceptance loop
/**
* Initiates the server connection acceptance loop. Must be called after
* listen. This method will have no effect until the underlying io_service
* starts running. It may be called after the io_service is already running.
*
* Refer to documentation for the transport policy you are using for
* instructions on how to stop this acceptance loop.
*/
void start_accept() {
lib::error_code ec;
start_accept(ec);
if (ec) {
throw exception(ec);
}
}
/// Handler callback for start_accept
void handle_accept(connection_ptr con, lib::error_code const & ec) {
if (ec) {
con->terminate(ec);
if (ec == error::operation_canceled) {
endpoint_type::m_elog.write(log::elevel::info,
"handle_accept error: "+ec.message());
} else {
endpoint_type::m_elog.write(log::elevel::rerror,
"handle_accept error: "+ec.message());
}
} else {
con->start();
}
lib::error_code start_ec;
start_accept(start_ec);
if (start_ec == error::async_accept_not_listening) {
endpoint_type::m_elog.write(log::elevel::info,
"Stopping acceptance of new connections because the underlying transport is no longer listening.");
} else if (start_ec) {
endpoint_type::m_elog.write(log::elevel::rerror,
"Restarting async_accept loop failed: "+ec.message());
}
}
};
} // namespace websocketpp
#endif //WEBSOCKETPP_SERVER_ENDPOINT_HPP
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