Allow WebSockets in Google Compute Engine (GCE)

I'm using Compute Engine (GCE) to run my socket server with Socket.IO (Node.js)

It's only working with polling. When I try to use a web client I receive this error code:

WebSocket connection to 'ws://myapp-socket.appspot.com/socket.io/?EIO=3&transport=websocket&sid=Tt4uNFR2fU82zsCIAADo' failed: Unexpected response code: 400  

What am I doing wrong? Is it GCE configuration problem?

1 Answers

Answers 1

You cannot use the myapp-socket.appspot.com domain in your script when using WebSockets. Instead, you will need to use the external ip of the GCE instance and connect directly to that, opening any firewall ports you may be using.

I believe traffic going to the appspot.com domain is also going through frontend webservers and socket.io needs a direct connection to the server.

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