CODEWITHSUNDEEP
javascriptnode.jssocket.io
Adam
Adam

Reputation: 2225

Socket.io connect with server offline

How do I detect if the server is offline, or for some other reason cannot connect. My code looks something like this.

this.socket = io.connect(connectionInfo, {
    reconnect:false
});

It does not throw any error, so a try/catch clause is not working.

Upvotes: 12

Views: 17989

Answers (3)

Kurt Pattyn
Kurt Pattyn

Reputation: 2788

Use

  • this.socket.on("connect", callback) to catch connection events
  • this.socket.on("disconnect", callback) to catch disconnection events
  • this.socket.on("connect_failed", callback) to catch failed connection attempts
  • this.socket.io.on("connect_error", callback) to catch if the server is offline

You can find all events, at https://github.com/LearnBoost/socket.io/wiki/Exposed-events

Upvotes: 24

onok
onok

Reputation: 271

Since the 1.0 update, connection events are different. read this page for more info: http://socket.io/docs/migrating-from-0-9/

In my case, i could detect a connection error like so:

var manager = io.Manager('http://'+window.location.hostname+':3000', { /* options */ });
manager.socket('/namespace');
manager.on('connect_error', function() {
    console.log("Connection error!");
});

this.socket = io.connect('http://'+window.location.hostname+':3000');

Upvotes: 4

Zombi
Zombi

Reputation: 1070

If your server is offline and Client tries to connect use:

socket.on('error', function (err) {
    console.log(err);
});

So Client knows he can not reach the server.

Upvotes: 2

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