socket.io-reqev

A framework for socket.io (server and client). this version corresponds to socket.io >= ver 1.0 if you want to use socket.io ver 0.9.x, choose socket.io-reqev ver 0.1.4

It is designed to make pub-sub and GET request easier. It allows you to write less code and easy to understand.

socket.io-reqev ties a path to an object and ties an event to a room.

Install

npm install socket.io-reqev

How to use

server(node.js)

var events = require('events');

var Sample = function(time){
  setInterval(function(){this.emit("alarm", {time: new Date().toString()})}.bind(this),time);
  this.events = ["alarm"];
}
Sample.prototype = new events.EventEmitter();
Sample.prototype.request = function(req,cb){ return req == "now" ?  cb(null,new Date().toString()) : cb("invalid")}

var IOReqEv = require('socket.io-reqev');
var ioReqEv = new IOReqEv(require('socket.io').listen(50000));

ioReqEv.register("/sample",new Sample(1000));
ioReqEv.register("/sample1",new Sample(10000));

client(browser)

//<script src="http://cdnjs.cloudflare.com/ajax/libs/socket.io/0.9.16/socket.io.min.js"></script>
//<script src="https://raw.github.com/takeshy/socket.io-reqev/master/dist/io-reqev-client.js"></script>
sock = new IOReqEvClient("http://localhost:50000/sample", function(obj){console.log(obj)})
sock.watch({requests: ["now"],events: ["alarm"]})
// when no need to use.
// sock.unwatch() 

API

Node.js

IOReqEv

Create a new IOReqEv with Socket.IO object.

var IOReqEv = require('socket.io-reqev')`
var ioReqEv = new IOReqEv(require('socket.io').listen(50000));

register(path:string,service:object)

• path is tied path of socket.io url(SocketIO Host Name + /path)

• service consists two parts.

  • events

    (optional) it is array and including event names. if the object emits an event included this field,socket.io-reqev sends to the subscribers that event.

  • request

    (optional)it is method function(reqest,callback). param request is a request of requests from a client. param callback is a function(error,value). when this method completes the request, this method shuold call the callback with the value and socket.io-recv replies the value to the client.

var events = require('events');

var Sample = function(time){
  setInterval(function(){this.emit("alarm", {time: new Date().toString()})}.bind(this),time);
  this.events = ["alarm"];
}
Sample.prototype = new events.EventEmitter();
Sample.prototype.request = function(req,cb){ return req == "now" ?  cb(null,new Date().toString()) : cb("invalid")}
ioReqEv.register("/sample",new Sample(1000));

Browser

IOReqEvClient(url:string,callback:function,errorCallback:function)

• url socket.io host + path
• callback it is called when socket.io host replies successful.
• errorCallback it is called when socket.io host replies unsuccessful.

watch(requests:array,events:array)

you call this method whenever you want.

• requests(optional)

An array of request. Each request passes server side object's method named 'request'. it is similar to HTTP GET but you can include multiple requests at once.

• events(optional)

An array of event name you want to subscribe. if you called watch already,socket-io-recv unsubscribes befores events. For that reason,if you want to keep subscribe,you should include all events you want subscribe or if events is not passed or null,socket-io-recv subscribing befores events. if you don't subscribe any event anymore,you should set empty array.

sock = new IOReqEvClient("http://localhost:50000/sample", function(obj){console.log(obj)})
sock.watch({requests: ["now"],events: ["alarm"]})

unwatch()

you don't need any request and event,then you call this method.

var socket.unwatch();

demo

if you don't understand, you can use demo and view demo/app.js and demo/index.html.

git clone https://github.com/takeshy/socket.io-reqev.git
cd socket.io-reqev/demo
npm install
node app.js

• browser

  http://localhost:8080

License

MIT