simple-websockets

Simple websocket server and client with callback-based API.

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Table of Contents

• Installation
• Usage
• License

Installation

pip install simple-websockets

Usage

Server

Here is a example of websocket echo server:

from simplews import SimpleWSServer

server = SimpleWSServer(host="",
                        port=8765,
                        print_details=True, # Print basic logs
                        print_messages=True) # Print every message received

@server.on_connect
async def on_connect(ws): # called when a client connects
    print(f'Client {ws.remote_address} connected')

@server.on_message
async def on_message(ws, message): # called when a message is received from a client
    await ws.send(message) # send the message back to the client

@server.on_close
async def on_close(ws): # called when a client disconnects
    print(f'Client {ws.remote_address} disconnected')

server.serve() # serve forever

Client

Here is a example of websocket client:

from simplews import SimpleWSClient
client = SimpleWSClient(uri="ws://localhost:8765",
                        print_details=True, # Print basic logs
                        print_messages=True) # Print every message received

@client.on_connect
async def on_connect(ws): # called when the connection is established
    print(f'Connected to {ws.remote_address}')

@client.on_message
async def on_message(ws, message): # called when a message is received
    print(f'Received: {message}')

@client.on_close
async def on_close(ws): # called when the connection is closed
    print(f'Connection to {ws.remote_address} closed')

client.connect() # connect to the server

Tips

• All callbacks are asynchronous, so don't forget async.
• ws.send() is a coroutine, so don't forget await.
• For more information about the ws argument, see WebSocketServerProtocol for server and WebSocketClientProtocol for client.
• server.broadcast() is the preferred way to send a message to all connected clients, and it's not a coroutine, so no await is needed.

License

simple-websockets is distributed under the terms of the GPL-3.0-only license.