WebsocketRailsClient++ is a C++ library that uses the implementation of RFC6455 (The WebSocket Protocol) implemented in the WebSocket++ library, the Json++ light-weight JSON parser and the Boost library. It allows connections to the Ruby Websocket-Rails server and supports the Websocket-Rails protocol.
- Boost library up and running, http://www.boost.org/ (>= 1.48 | see own license)
- WebSocket++ library, https://github.com/zaphoyd/websocketpp (>= 0.3.0 | see own license)
- Jsonxx library, https://github.com/hjiang/jsonxx (latest | see own license)
- Websocket-Rails server, https://github.com/websocket-rails/websocket-rails (v0.7.0)
- Full support for RFC6455
- Full Websocket-Rails protocol support
- Message/event based interface
- Supports secure WebSockets (TLS), IPv6, and explicit proxies.
- Callbacks with member and non-member functions
- Thread-safe
connect(std::string url): Start connection of the client.disconnect(): Disconnect client.reconnect(): Re-connect the client with all registered channels.
onOpen(boost::bind cb): callback on open connection.onClose(boost::bind cb): callback on close connection.onFail(boost::bind cb): callback on fail connection.
trigger(std::string event_name, jsonxx::Object event_data): trigger event with data without callback.trigger(std::string event_name, jsonxx::Object event_data, boost::bind cb_succ, boost::bind cb_fail): trigger event with data and callbacks.
bind(std::string event_name, boost::bind cb): Bind to an event name with callback.
unbindAll(std::string event_name): Unbind all callbacks on a specific event name.
getChannel(std::string channel_name): Get a channel after subscribed to it.subscribe(std::string channel_name): Subscribe to a channel.subscribePrivate(std::string channel_name, boost::bind cb_succ, boost::bind cb_fail): Subscribe to a private channel with callbacks.unsubscribe(std::string channel_name): Unsubscribe a channel.unsubscribe(std::string channel_name, boost::bind cb_succ, boost::bind cb_fail): Unsubscribe a private channel with callbacks.
trigger(std::string event_name, jsonxx::Object event_data): trigger channel event with data without callback.
bind(std::string event_name, boost::bind cb): Bind to a channel event with callback.
unbindAll(std::string event_name): Unbind all callbacks on a specific event name.
- Boost libraries: boost_system, boost_thread
- System libraries: pthread, rt
- TSL libraries: ssl, crypto
-D_WEBSOCKETPP_CPP11_STL_
-I"/path/to/includes"
-std=c++11
- Includes
#include <iostream>
#include "websocket-rails-client/websocket_rails.hpp"- Callback definitions
/* Non-member callback function for onOpen */
void on_open(jsonxx::Object data) {
std::cout << "Function on_open called" << std::endl;
std::cout << data.json() << std::endl;
}
/* Non-member callback functions */
void callback(jsonxx::Object data) {
std::cout << "Function callback called" << std::endl;
std::cout << data.json() << std::endl;
}
void success_func(jsonxx::Object data) { ... }
void failure_func(jsonxx::Object data) { ... }
void bind_func_with_params(jsonxx::Object data, int number, bool valid) { ... }- Initialization
WebsocketRails dispatcher("ws://localhost:3000/websocket");
/* Connection callbacks definitions */
dispatcher.onOpen(boost::bind(on_open, _1));
dispatcher.onClose(boost::bind(on_close, _1));
dispatcher.onFail(boost::bind(on_fail, _1));
/* Define binds before connect. */
/* Start Websocket-Rails connection handshake */
dispatcher.connect();- Bind and unbind events to callbacks
/* Event bind callback definition */
dispatcher.bind("users_pool", boost::bind(callback, _1));
/* Event bind callback definition with member function callback */
Foo my_foo;
dispatcher.bind("users_pool", boost::bind(&Foo::success_func, my_foo, _1));
/* Event unbind callback definition */
dispatcher.unbindAll("users_pool");- Trigger events
/* Trigger an event */
dispatcher.trigger("users_create", jsonxx::Object("name", "Hans Mustermann"));
dispatcher.trigger("users_create", jsonxx::Object("name", "Frau Mustermann"), boost::bind(success_func, _1), boost::bind(failure_func, _1));
/* Trigger an event with member function callback */
Bar my_bar;
dispatcher.trigger("users_pool", boost::bind(&Foo::success_func, my_bar, _1), boost::bind(&Foo::failure_func, my_bar, _1));- Use channels
/* Subscribe to channels */
dispatcher.subscribe("Authors");
dispatcher.subscribe("Users", boost::bind(success_func, _1), boost::bind(failure_func, _1));
dispatcher.subscribePrivate("Administrators");
dispatcher.subscribePrivate("Moderators", boost::bind(success_func, _1), boost::bind(failure_func, _1));
/* Unsubscribe channels */
dispatcher.unsubscribe("Authors");
dispatcher.unsubscribe("Users", boost::bind(success_func, _1), boost::bind(failure_func, _1));- Trigger, bind and unbind channel-events
/* Trigger an event on channel */
dispatcher.getChannel("Authors").trigger("users_create", jsonxx::Object("name", "Hans Mustermann"));
/* Channel event bind callback definition */
dispatcher.getChannel("Authors").bind("users_pool", boost::bind(callback, _1));
/* Event unbind callback definition */
dispatcher.getChannel("Authors").unbindAll("users_pool");- Callback additional parameters
/* Define boost binds with additional parameters for the callback function */
boost::bind(bind_func_with_params, _1, param1, param2);
boost::bind(bind_func_with_params, _1, 123, true);
boost::bind(bind_func_with_params, _1, 123, param2);
- To authenticate a user a separate C++ HTTP client library is required.
- Add timestamp to events so that it is possible to clean the events queue with old events without response.
- Implement a clean-up method for the queue.
Egon Zemmer, Phlegx Systems - @phlegx
The MIT License (http://opensource.org/licenses/MIT)
Copyright (C) 2015 Egon Zemmer, Phlegx Systems
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