Socket.IO server
Project description
Python implementation of the Socket.IO realtime server.
Features
Fully compatible with the Javascript, Swift, C++ and Java official Socket.IO clients, plus any third party clients that comply with the Socket.IO specification.
Compatible with Python 2.7 and Python 3.3+.
Supports large number of clients even on modest hardware when used with an asynchronous server based on eventlet or gevent. For development and testing, any WSGI complaint multi-threaded server can be used.
Includes a WSGI middleware that integrates Socket.IO traffic with standard WSGI applications.
Broadcasting of messages to all connected clients, or to subsets of them assigned to “rooms”.
Optional support for multiple servers, connected through a messaging queue such as Redis or RabbitMQ.
Send messages to clients from external processes, such as Celery workers or auxiliary scripts.
Event-based architecture implemented with decorators that hides the details of the protocol.
Support for HTTP long-polling and WebSocket transports.
Support for XHR2 and XHR browsers.
Support for text and binary messages.
Support for gzip and deflate HTTP compression.
Configurable CORS responses, to avoid cross-origin problems with browsers.
Example
The following application uses Flask to serve the HTML/Javascript to the client:
import socketio
import eventlet
from flask import Flask, render_template
sio = socketio.Server()
app = Flask(__name__)
@app.route('/')
def index():
"""Serve the client-side application."""
return render_template('index.html')
@sio.on('connect', namespace='/chat')
def connect(sid, environ):
print("connect ", sid)
@sio.on('chat message', namespace='/chat')
def message(sid, data):
print("message ", data)
sio.emit(sid, 'reply')
@sio.on('disconnect', namespace='/chat')
def disconnect(sid):
print('disconnect ', sid)
if __name__ == '__main__':
# wrap Flask application with engineio's middleware
app = socketio.Middleware(sio, app)
# deploy as an eventlet WSGI server
eventlet.wsgi.server(eventlet.listen(('', 8000)), app)
Resources
Release history Release notifications | RSS feed
Download files
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
