error in connection the socket.io from different server

Question

error in connection the socket.io from different server

I am making a mobile app with node.js REST API as backend and Angular as frontend both will be on different server. the angular app will later be on attached with phonegap to make it hybrid App. I am using socket.io and try to connect the front end to back end to built a built a chat.

I am getting an error when I try to connect the socket through

io.connect("(http://localhost:3000/")

XMLHttpRequest cannot load

http://localhost:3000/socket.io/?EIO=3&transport=polling&t=1412172739903-3

. A wildcard '*' cannot be used in the 'Access-Control-Allow-Origin' header when the credentials flag is true. Origin

'http://localhost:1235'

is therefore not allowed access.

javascript
node.js
angularjs
cordova
socket.io

Answer 1

In your NodeJS serverside code (Assume if you used ExpressJS in backend), did you add

res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "X-Requested-With");

This site might help you: Enable cors in serverside

Answer 2

I recommend use https://www.npmjs.org/package/cors

This module enable http://en.wikipedia.org/wiki/Cross-origin_resource_sharing on you're apps