node.js Cannot GET /socket.io

Question

I have the following app with express/socket.io (the app is listening and live without any errors). When I http-request it I get the following error:

GET http://xxxxxxx.com:3035/socket.io/1/?t=1449090610579 400 (Bad Request)

And on the socket.io reponse at http://xxxxxxx.com:3035/socket.io I get:

Cannot GET /socket.io

app.js:

var express = require('express'),
    http = require('http'),
    sio= require('socket.io'),
    fs=require('fs'),
    app = express();

var mysql      = require('mysql');
var connection = mysql.createConnection({
        host: 'localhost',
        user: 'xxxxxxx',
        password: 'xxxxxxx',
        database: 'xxxxxxxxx'
    }
);
connection.connect();

// Start the server
var server=app.listen(3035, function () {
    console.log("Express server listening on port %d",3035);
});
app.io=io=sio.listen(server);
.
.
.

on the client side:

var socket = io.connect('http://xxxxxx.com:3035');

Looks like it can't get the static script file because you're missing a basic static route. — adeneo
– adeneo, Commented Dec 2, 2015 at 21:21
This was running well before I migrate to a new server. not sure what is missing exactly! — mediaroot
– mediaroot, Commented Dec 2, 2015 at 21:22
Then it's probably not the static route thing, Socket.io creates it's own routes if I remember correctly. Something changed when migrating, and the URL is no longer correct, you probably have to do some fault searching on your own. — adeneo
– adeneo, Commented Dec 2, 2015 at 21:25
var express = require('express')(); var http = require('http').Server(express); var sio = require('socket.io')(http); — Gary
– Gary, Commented Dec 2, 2015 at 22:05

Phil Dornfeld · Accepted Answer · 2015-12-02 21:27:51Z

1

Your sio is a function. You need to call it with your server as an argument.

Add server=require('http').Server(app) sio=require('socket.io')(server)

answered Dec 2, 2015 at 21:27

Phil Dornfeld

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1 Comment

mediaroot Over a year ago

I have tried the same in vain. Thank you. I will try around with this!

jfriend00 · Accepted Answer · 2015-12-02 21:37:18Z

1

io.connect() takes a URL such as http://example.com:3035.

You are passing xxxxxx.com:3035 which is not a proper URL form.

Also, note that if you're just trying to connect to the same server and port as the web page came from, you can just use:

io()

or

io.connect()

And the socket.io library will connect back to the same host and port as the web page.

answered Dec 2, 2015 at 21:37

jfriend00

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2 Comments

mediaroot Over a year ago

I was using the full URL with http. Sorry I did a typing mistake while masking the domain, I will correct it. using io() broke my app not sure why!

mediaroot Over a year ago

Thank you by the way for your answer. more hints allows me to figure out the problem!

kaytrance · Accepted Answer · 2015-12-03 11:06:15Z

0

You should initialize default connection on client side by

io.connect( "/" );

According to documentation by default socket.io will connect to the same host and port where rendered webpage is. The / in the path states to connect to default namespace.

answered Dec 3, 2015 at 11:06

kaytrance

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