instantchat/server/chatserver.py

#!/usr/bin/env python

# Example code from:
# https://websockets.readthedocs.io/en/stable/intro.html

import asyncio
import websockets


async def parse_client_message(websocket, message_text):
    """Parse a message (JSON object) from a client."""

    # TODO parse JSON
    response = f"Hello {message_text}!"

    await websocket.send(response)
    print(f"> {response}")


async def client_handler(websocket, path):
    """Handle client connection."""

    print(f"++ New client")
    try:
        # Read and parse messages until connection is closed
        async for message_text in websocket:
            print(f"< {message_text}")
            await parse_client_message(websocket, message_text)
    finally:
        print(f"-- Client connection closed")

# Create WebSocket listener
start_server = websockets.serve(client_handler, '0.0.0.0', 32715)

asyncio.get_event_loop().run_until_complete(start_server)
asyncio.get_event_loop().run_forever()