node.js /socket.io/socket.io.js not found

Question

i keep on getting the error /socket.io/socket.io.js 404 (Not Found) Uncaught ReferenceError: io is not defined

my code is

var express = require('express'), http = require('http'); var app = express(); var server = http.createServer(app); var io = require('socket.io').listen(server);  server.listen(3000); 

and

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

what is the problem ???

any help is welcome!

Answer 1

Copying socket.io.js to a public folder (something as resources/js/socket.io.js) is not the proper way to do it.

If Socket.io server listens properly to your HTTP server, it will automatically serve the client file to via http://localhost:<port>/socket.io/socket.io.js, you don't need to find it or copy in a publicly accessible folder as resources/js/socket.io.js & serve it manually.

Code sample
Express 3.x - Express 3 requires that you instantiate a http.Server to attach socket.io to first

var express = require('express')   , http = require('http'); //make sure you keep this order var app = express(); var server = http.createServer(app); var io = require('socket.io').listen(server);  //...   server.listen(8000); 

Happy Coding :)

Answer 2

How to find socket.io.js for client side

install socket.io

npm install socket.io 

find socket.io client

find ./ | grep client | grep socket.io.js 

result:

./node_modules/socket.io/node_modules/socket.io-client/dist/socket.io.js 

copy socket.io.js to your resources:

cp ./node_modules/socket.io/node_modules/socket.io-client/dist/socket.io.js /home/proyects/example/resources/js/ 

in your html:

<script type="text/javascript" src="resources/js/socket.io.js"></script>