socket.io on Google App Engine using node.js

Contents below are of websockets sample in GAE and setup is also applicable to socket.io. This sample demonstrates how to use WebSockets on Google App Engine Managed VMs with Node.js.

Note: Secure WebSockets are currently not supported by Managed VMs. WebSockets will only work if you load your page over HTTP (not HTTPS).

To use Secure WebSockets now, you can launch a VM on Google Compute Engine using a custom image where you have added SSL support for WebSockets.

Refer to the appengine/README.md file for instructions on running and deploying.

Setup

Before you can run or deploy the sample, you will need to create a new firewall rule to allow traffic on port 65080. This port will be used for websocket connections. You can do this with the Google Cloud SDK with the following command:

gcloud compute firewall-rules create default-allow-websockets \
  --allow tcp:65080 \
  --target-tags websocket \
  --description "Allow websocket traffic on port 65080"