WebSocketServer Cocos2djs - part 2 - c++ and javascript binding

This is the second blog entry where to explain what was the procedure i follow to create a native WebSocket Server for Cocos2dJs and examples to test it in android and ios.

In this second entry i'm going to explain a little bit about the c++ implementation of the Websocket server, the javascript binding and the javascript code that can be used.

(tested with cocos2djs 3.13.1)

Cocos2djs WebSocket Server

Websocket Server Implementation

The implementation comes from a copy of the files Websocket.h and Websocket.cpp from the same cocos2d-x. (cocos2d-x\cocos\network).

• I get some ideas from https://github.com/mnisjk/cppWebSockets.
• Used the same thread management than in Websocket client.
• Created all callbacks to the server. 
• Maintains a list of all the clients and their messages.
• Create a delegate class with the methods onStart, onStop, onMessage, onConnection, onDisconnection.
• I'm not a very skilled C++ developer so the thread and memory management can be improved. (Anyone that wants to contribute is welcome)

Javascript Binding

The implementation comes from a copy of the files jsb_websocket.h and jsb_websocket.cpp from the same cocos2d-x. (cocos2d-x\cocos\scriptting\js\network).

Javascript Api

The javascript api includes a class with following interface.

Class Name: WebSocketServer

Constructor: WebSocketServer(port, protocol) 

Methods:

• stop()
• send(clientId, message)
• broadcast(message)

Listeners:

• onServerUp()
• onServerDown ()
• onMessage(clientId, message)
• onConnection(clientId)
• onDiscconection(clientId)
• onError(error)

Attributes:

• readyState  (possible values are WebSocketServer.UP, WebSocketServer.DOWN, WebSocketServer.STARTING, WebSocketServerSTOPPING)

The best way to see how it works is to see the "app.js" in the GitHub repository and follow the examples for android and ios.

https://github.com/carlgira/wsserver-cocos2djs.git


Part 1 - WebSocketServer Cocos2djs - libwebsocket
Part 2 - WebSocketServer Cocos2djs - c++ and javascript binding
Part 3 - WebSocketServer Cocos2djs - android
Part 4 - WebSocketServer Cocos2djs - ios