This example is a fork of the chat application that is featured as a demo in the official Socket.IO website: https://socket.io/demos/chat.

The original source has been modified so that the Socket.IO server is implemented using Asynction.

• asyncapi.yml: The specification that drives the Socket.IO server.
• app.py: The server implementation. Includes the event handlers as well as the construction of the flask.Flask and flask_socketio.SocketIO instances.
• mock_app.py: The mock server implementation.
• client/: The client implementation, using express and vanilla JavaScript.
• Makefile: Includes commands for launching the client and server instances.

Both of the server and client applications are dockerised and bundled together in a docker-compose setup.

$ make docker-run  # Launches both client and server

First make sure that you have python 3.7+ and node 12+ installed in your local environment.

$ make run-server  # Installs python deps and launches the server
$ make run-client  # Installs node.js deps and launches the client

Client: http://localhost:3000.
Server: http://localhost:5000.

To connect to the bonus /admin Socket.IO namespace, use the token URL query param when accessing the client app: http://localhost:3000?token=admin.

Server generated docs can be accessed at http://localhost:5000/docs.

$ make run-server-mock  # Listens to localhost:5000 by default
$ make run-client  # The same app client should seamingly integrate with the mock server