external_io_service.cpp

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/*
 * Copyright (c) 2015, 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.
 */
 
#include "tcp_echo_server.hpp"
 
#include <websocketpp/config/asio_no_tls.hpp>
#include <websocketpp/server.hpp>
 
#include <iostream>
 
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
 
typedef websocketpp::server<websocketpp::config::asio> ws_echo_server;
 
// Define a callback to handle incoming messages
void on_message(ws_echo_server* s, websocketpp::connection_hdl hdl, ws_echo_server::message_ptr msg) {
    std::cout << "on_message called with hdl: " << hdl.lock().get()
              << " and message: " << msg->get_payload()
              << std::endl;
 
    // check for a special command to instruct the server to stop listening so
    // it can be cleanly exited.
    if (msg->get_payload() == "stop-listening") {
        s->stop_listening();
        return;
    }
 
    try {
        s->send(hdl, msg->get_payload(), msg->get_opcode());
    } catch (websocketpp::lib::error_code const & e) {
        std::cout << "Echo failed because: " << e
                  << "(" << e.message() << ")" << std::endl;
    }
}
 
int main() {
    asio::io_service service;
 
    // Add a TCP echo server on port 9003
    tcp_echo_server custom_http_server(service, 9003);
 
    // Add a WebSocket echo server on port 9002
    ws_echo_server ws_server;
    ws_server.set_access_channels(websocketpp::log::alevel::all);
    ws_server.clear_access_channels(websocketpp::log::alevel::frame_payload);
 
    // The only difference in this code between an internal and external
    // io_service is the different constructor to init_asio
    ws_server.init_asio(&service);
 
    // Register our message handler
    ws_server.set_message_handler(bind(&on_message,&ws_server,::_1,::_2));
    ws_server.listen(9002);
    ws_server.start_accept();
 
    // TODO: add a timer?
 
    // Start the Asio io_service run loop for all
    service.run();
}