WebSocket++

. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .

server

docker run --detach -p 10001:8080 jmalloc/echo-server

client

#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;

// Handlers
void on_open(client* c, websocketpp::connection_hdl hdl) {
    std::string msg = "Hello";
    c->send(hdl,msg,websocketpp::frame::opcode::text);
    c->get_alog().write(websocketpp::log::alevel::app, "Sent Message: "+msg);
}

void on_fail(client* c, websocketpp::connection_hdl hdl) {
    c->get_alog().write(websocketpp::log::alevel::app, "Connection Failed");
}

void on_message(client* c, websocketpp::connection_hdl hdl, message_ptr msg) {
    c->get_alog().write(websocketpp::log::alevel::app, "Received Reply: "+msg->get_payload());
    c->close(hdl,websocketpp::close::status::normal,"");
}

void on_close(client* c, websocketpp::connection_hdl hdl) {
    c->get_alog().write(websocketpp::log::alevel::app, "Connection Closed");
}

int main(int argc, char* argv[]) {
    client c;

    std::string uri = "ws://localhost:9002";

    if (argc == 2) {
        uri = argv[1];
    }

    try {
        // set logging policy if needed
        c.clear_access_channels(websocketpp::log::alevel::frame_header);
        c.clear_access_channels(websocketpp::log::alevel::frame_payload);
        //c.set_error_channels(websocketpp::log::elevel::none);

        // Initialize ASIO
        c.init_asio();

        // Register our handlers
        c.set_open_handler(bind(&on_open,&c,::_1));
        c.set_fail_handler(bind(&on_fail,&c,::_1));
        c.set_message_handler(bind(&on_message,&c,::_1,::_2));
        c.set_close_handler(bind(&on_close,&c,::_1));

        // Create a connection to the given URI and queue it for connection once
        // the event loop starts
        websocketpp::lib::error_code ec;
        client::connection_ptr con = c.get_connection(uri, ec);
        c.connect(con);

        // Start the ASIO io_service run loop
        c.run();
    } catch (const std::exception & e) {
        std::cout << e.what() << std::endl;
    } catch (websocketpp::lib::error_code e) {
        std::cout << e.message() << std::endl;
    } catch (...) {
        std::cout << "other exception" << std::endl;
    }
}

sudo apt install libwebsocketpp-dev

g++ basic_client.cpp -lpthread
./a.out http://localhost:10001/.ws