88 lines
3.7 KiB
Python
88 lines
3.7 KiB
Python
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import os
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from engineio.static_files import get_static_file
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class WSGIApp(object):
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"""WSGI application middleware for Engine.IO.
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This middleware dispatches traffic to an Engine.IO application. It can
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also serve a list of static files to the client, or forward unrelated
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HTTP traffic to another WSGI application.
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:param engineio_app: The Engine.IO server. Must be an instance of the
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``engineio.Server`` class.
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:param wsgi_app: The WSGI app that receives all other traffic.
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:param static_files: A dictionary with static file mapping rules. See the
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documentation for details on this argument.
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:param engineio_path: The endpoint where the Engine.IO application should
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be installed. The default value is appropriate for
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most cases.
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Example usage::
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import engineio
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import eventlet
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eio = engineio.Server()
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app = engineio.WSGIApp(eio, static_files={
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'/': {'content_type': 'text/html', 'filename': 'index.html'},
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'/index.html': {'content_type': 'text/html',
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'filename': 'index.html'},
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})
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eventlet.wsgi.server(eventlet.listen(('', 8000)), app)
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"""
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def __init__(self, engineio_app, wsgi_app=None, static_files=None,
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engineio_path='engine.io'):
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self.engineio_app = engineio_app
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self.wsgi_app = wsgi_app
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self.engineio_path = engineio_path
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if not self.engineio_path.startswith('/'):
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self.engineio_path = '/' + self.engineio_path
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if not self.engineio_path.endswith('/'):
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self.engineio_path += '/'
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self.static_files = static_files or {}
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def __call__(self, environ, start_response):
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if 'gunicorn.socket' in environ:
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# gunicorn saves the socket under environ['gunicorn.socket'], while
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# eventlet saves it under environ['eventlet.input']. Eventlet also
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# stores the socket inside a wrapper class, while gunicon writes it
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# directly into the environment. To give eventlet's WebSocket
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# module access to this socket when running under gunicorn, here we
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# copy the socket to the eventlet format.
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class Input(object):
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def __init__(self, socket):
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self.socket = socket
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def get_socket(self):
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return self.socket
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environ['eventlet.input'] = Input(environ['gunicorn.socket'])
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path = environ['PATH_INFO']
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if path is not None and path.startswith(self.engineio_path):
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return self.engineio_app.handle_request(environ, start_response)
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else:
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static_file = get_static_file(path, self.static_files) \
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if self.static_files else None
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if static_file and os.path.exists(static_file['filename']):
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start_response(
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'200 OK',
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[('Content-Type', static_file['content_type'])])
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with open(static_file['filename'], 'rb') as f:
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return [f.read()]
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elif self.wsgi_app is not None:
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return self.wsgi_app(environ, start_response)
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return self.not_found(start_response)
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def not_found(self, start_response):
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start_response("404 Not Found", [('Content-Type', 'text/plain')])
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return [b'Not Found']
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class Middleware(WSGIApp):
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"""This class has been renamed to ``WSGIApp`` and is now deprecated."""
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def __init__(self, engineio_app, wsgi_app=None,
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engineio_path='engine.io'):
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super(Middleware, self).__init__(engineio_app, wsgi_app,
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engineio_path=engineio_path)
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