echo_client.cpp

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/*
 * Copyright (c) 2016, 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 <websocketpp/config/asio_no_tls_client.hpp>
#include <websocketpp/client.hpp>
 
#include <iostream>
 
typedef websocketpp::client<websocketpp::config::asio_client> client;
 
using websocketpp::lib::placeholders::_1;
using websocketpp::lib::placeholders::_2;
using websocketpp::lib::bind;
 
// pull out the type of messages sent by our config
typedef websocketpp::config::asio_client::message_type::ptr message_ptr;
 
// This message handler will be invoked once for each incoming message. It
// prints the message and then sends a copy of the message back to the server.
void on_message(client* c, websocketpp::connection_hdl hdl, message_ptr msg) {
    std::cout << "on_message called with hdl: " << hdl.lock().get()
              << " and message: " << msg->get_payload()
              << std::endl;
 
 
    websocketpp::lib::error_code ec;
 
    c->send(hdl, msg->get_payload(), msg->get_opcode(), ec);
    if (ec) {
        std::cout << "Echo failed because: " << ec.message() << std::endl;
    }
}
 
int main(int argc, char* argv[]) {
    // Create a client endpoint
    client c;
 
    std::string uri = "ws://localhost:9002";
 
    if (argc == 2) {
        uri = argv[1];
    }
 
    try {
        // Set logging to be pretty verbose (everything except message payloads)
        c.set_access_channels(websocketpp::log::alevel::all);
        c.clear_access_channels(websocketpp::log::alevel::frame_payload);
 
        // Initialize ASIO
        c.init_asio();
 
        // Register our message handler
        c.set_message_handler(bind(&on_message,&c,::_1,::_2));
 
        websocketpp::lib::error_code ec;
        client::connection_ptr con = c.get_connection(uri, ec);
        if (ec) {
            std::cout << "could not create connection because: " << ec.message() << std::endl;
            return 0;
        }
 
        // Note that connect here only requests a connection. No network messages are
        // exchanged until the event loop starts running in the next line.
        c.connect(con);
 
        // Start the ASIO io_service run loop
        // this will cause a single connection to be made to the server. c.run()
        // will exit when this connection is closed.
        c.run();
    } catch (websocketpp::exception const & e) {
        std::cout << e.what() << std::endl;
    }
}