Socket.IO & Realtime application

We all once believed that the development of a realtime application is difficult . But that's worng

in fact it's not that difficult especialy for web developer the Reaseon ? 


Socket.IO 

   


To simplify things Socket.io is nodejs module (server side JavaScript)  to send and receive a kind of 

events.

Basically, you send and listen to emit events on both side front and back end 


 To install it on your project
npm install socket.io
you need also to include javascript library in the front end

<script src="/socket.io/socket.io.js"></script><script>

exemple

 Client side :
socket.on   means we listen to an event called  news
socket.emit we send an event called my other event to the server




Server Side :

io.on('connection' is listen to when the user is connected  when logged or not i takes socket
as parametre socket conatins all connected users
socket.emit  send an event called news to the client
socket.on means we listen to an event 'my other event'
To sum it the when the user is connected the server emit news event  and when the user recive it,he send another event  'my  other event' and the server listen it

 NB : you can also send an event to all users exept you by using emit.broadcast
ex when chat user is connected notify all user exept you


Comments

Post a Comment

Popular posts from this blog

Realtime Chat Application with CakePHP and Socket.IO #1

Image
In this blog we will build a Realtime Chat Application with CakePHP and Socket.IO Your are free to use another framework, the idea is just learning the basics and a few (Socket.IO) tips Database :  To store our data for this application we need 4 tables :  users :         contains user's informations such as username and password hash ,email ...  messages : contains messages between users, it also store the information of sender and destination  user companies : or teams table ,in order to organise groups i add this table to give the user the freedom  of organizing his contact it stores the company name with his owner .   companies_users : it contains the users and their respective  companies here the SQL file fo database structure     file in the next tutorial we'r gone started building the frontend using cakephp  
Read more

Twitter API with PHP

Image
In order to use a communicante with a website ( in this case twitter) , we need to call it's  api But there too many standars to communicate with api ( OAuth1, OAuth2...) , hopefully they provides api documentation . In this tutoriel we are gonna use twitter api ( 1.1  ) as exemple to get ou last tweets , but first we have to create twitter application Creating twitter application give us  some random strings `consumer_secret`, `consumer_key`, `access_token` and  `access_token_secret` We will use these strings later in OAuth process. Don't panic no need to knowing all OAuth process using  php , Moreover, there are many php libraries and packages to do this for us , there is a very popular one ( twitter-api-php ) first we create an empty folder for our project then require the package : composer require  j7mbo/twitter-api-php copy and past random strings from your twitter application in to this array  variable :...
Read more

Let's build a mobile application with Ionic Framework #3

Image
Today We 're gonna start to write some code , first is make a main controller to our ionic application , of course by controller i mean angularjs controller . we start by add ng-controller to our body tag , but this is just a reference to controller we need also to create this controller (MainController) .  The idea is just use http call to get the data.json AngularJS comes with built in $ http service  to make (GET,UPDATE,POST,DELETE) in our case we are are doing get call app.controller('MainController',function ($scope,$http) {   // body...   $http.get("data.json")     .then(function(response) {         console.log(response)     }); }) we are just login data in the console. NB : the http call could make some time before it returns the  data in , our case we are working localy, but in real life we have to work with web services and  probably internet connection like mine lo...
Read more