Skip to content

Instantly share code, notes, and snippets.

@SCG82
Forked from zaphoyd/basic_client.cpp
Created April 30, 2019 09:51
Show Gist options
  • Save SCG82/e307725daa4488127c6da146d727c48d to your computer and use it in GitHub Desktop.
Save SCG82/e307725daa4488127c6da146d727c48d to your computer and use it in GitHub Desktop.
An example of a basic WebSocket++ client that sends a message, waits for a response, then closes the connection
#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;
}
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment