This repository demonstrates a simple use case of
- How to make a simple websocket server
- How to make an asynchronous websocket client that can be used from synchronous code
The websocket server is not difficult and can be built from examples of the Tornado library. The websocket client, however, is rather tricky as it involves asyncio event loops being managed across threads. After struggling to get it to work just right, I've made this example to serve as a reminder of how to do it.
The server is simply an echo server. It accepts all connections on ws://localhost:8080/socket. Whenever it receives a message, it simply echos that message back to all clients connected to it (along with printing to the console).
There is an abstract client that can be overwritten with advanced behavior. I provide a simple implementation that just prints all messages it receives from the socket to the console.
- Make sure the requirements are installed (Requires Python 3.7+)
pip install -r requirements.txt
- In one terminal, start the server
python server.py
- In a second terminal, run the client
python client.py
In the client terminal, you can then type messages to send to the server (which will be echoed back). You can type "kill" to kill the client.