/usr/lib/python3/dist-packages/engineio/middleware.py is in python3-engineio 1.6.1-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | class Middleware(object):
"""WSGI middleware for Engine.IO.
This middleware dispatches traffic to an Engine.IO application, and
optionally forwards regular HTTP traffic to a WSGI application.
:param engineio_app: The Engine.IO server.
:param wsgi_app: The WSGI app that receives all other traffic.
:param engineio_path: The endpoint where the Engine.IO application should
be installed. The default value is appropriate for
most cases.
Example usage::
import engineio
import eventlet
from . import wsgi_app
eio = engineio.Server()
app = engineio.Middleware(eio, wsgi_app)
eventlet.wsgi.server(eventlet.listen(('', 8000)), app)
"""
def __init__(self, engineio_app, wsgi_app=None, engineio_path='engine.io'):
self.engineio_app = engineio_app
self.wsgi_app = wsgi_app
self.engineio_path = engineio_path.strip('/')
def __call__(self, environ, start_response):
if 'gunicorn.socket' in environ:
# gunicorn saves the socket under environ['gunicorn.socket'], while
# eventlet saves it under environ['eventlet.input']. Eventlet also
# stores the socket inside a wrapper class, while gunicon writes it
# directly into the environment. To give eventlet's WebSocket
# module access to this socket when running under gunicorn, here we
# copy the socket to the eventlet format.
class Input(object):
def __init__(self, socket):
self.socket = socket
def get_socket(self):
return self.socket
environ['eventlet.input'] = Input(environ['gunicorn.socket'])
path = environ['PATH_INFO']
if path is not None and \
path.startswith('/{0}/'.format(self.engineio_path)):
return self.engineio_app.handle_request(environ, start_response)
elif self.wsgi_app is not None:
return self.wsgi_app(environ, start_response)
else:
start_response("404 Not Found", [('Content-type', 'text/plain')])
return ['Not Found']
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