gevent-websocket is a websocket library for the gevent networking library written written and maintained by Jeffrey Gelens It is licensed under the BSD license.
Install Python 2.4 or newer and gevent and its dependencies. The latest release can be download from PyPi or by cloning the repository.
At the moment gevent-websocket has one handler based on the Pywsgi gevent server. Set the handler_class when creating a pywsgi server instance to make use of the Websocket functionality:
from gevent import pywsgi
from geventwebsocket.handler import WebSocketHandler
server = pywsgi.WSGIServer(('127.0.0.1', 8000), websocket_app,
handler_class=WebSocketHandler)
server.serve_forever()
Afterwards write a WSGI application with a 3rd parameter, namely a websocket instance:
def websocket_app(environ, start_response):
if environ["PATH_INFO"] == '/echo':
ws = environ["wsgi.websocket"]
message = ws.wait()
ws.send(message)
Using Gunicorn it is even more easy to start a server. Only the websocket_app from the previous example is required to start the server. Start Gunicorn using the following command and worker class:
gunicorn -k "geventwebsocket.gunicorn.workers.GeventWebSocketWorker" gunicorn_websocket:websocket_app