I'm developing an app that uses socket.io, but it always fallback to xhr polling transportation method, and I can't understand why.
I'm using Chrome, but I already tested with other browsers, and the xhr polling transportation method still be used.
I'm using Cloud9 IDE in c9.io.
Have you ever saw this behaviour?
Cloud9 IDE only supports xhr polling transportation method like heroku https://devcenter.heroku.com/articles/using-socket-io-with-node-js-on-heroku