Ruby(Opal) + Express.js + Socket.io. Real time chat Server implementation

#ruby #realtime #node #socketio

Opal implementation of a simple server with Express and Socket.io

Link to the implementation: https://github.com/sebyx07/opal-express-socketio

Demo https://opal-realtime-socket-express.herokuapp.com/

Run

Installation

git clone https://github.com/sebyx07/opal-express-socketio.git opal-server cd opal-server bundle install && yarn install # install deps

Update index.html

var socket = io.connect('https://opal-realtime-socket-express.herokuapp.com', {transports:['websocket']}); // with var socket = io.connect('http://localhost:8000', {transports:['websocket']});

Usage

Replace

rake it's the default rake task that starts the server

go to http://localhost:8000

Server.new(8000) do |s, io| s # you can access express methods: with get, post, use, etc. Most is supported # callbacks, you replace them with do; end blocks io # you can use socket-io methods: on, emit etc. Most is supported # socket must be wrapped using Native() end

Example server usage

Server.new(8000) do |s, io| # express part s.use(Logger) # use middlewares s.start! # start the server s.get("/") do |_, res| # handle get to root request res.sendFile(s.view("index.html")) # send the index html file end s.get("/:name") do |req, res| # handle dynamic requests res.send(req.params.name) end # socket io part io.on 'connection' do |socket| # initialize socket io connection socket = Native(socket) # if you have problems with apply for a object, just Native() it socket.on('chat message') do |msg| # listen for messages io.emit('chat message', msg) # send it back, to all clients end socket.on('disconnect') do # handle disconnect p "disconnect" end end end