tornado.wsgi
— Interoperability with other Python frameworks and servers¶
WSGI support for the Tornado web framework.
WSGI is the Python standard for web servers, and allows for interoperability between Tornado and other Python web frameworks and servers. This module provides WSGI support in two ways:
WSGIApplication
is a version oftornado.web.Application
that can run inside a WSGI server. This is useful for running a Tornado app on another HTTP server, such as Google App Engine. See theWSGIApplication
class documentation for limitations that apply.WSGIContainer
lets you run other WSGI applications and frameworks on the Tornado HTTP server. For example, with this class you can mix Django and Tornado handlers in a single server.
WSGIApplication¶
-
class
tornado.wsgi.
WSGIApplication
(handlers=None, default_host='', **settings)[source]¶ A WSGI equivalent of
tornado.web.Application
.WSGIApplication
is very similar totornado.web.Application
, except no asynchronous methods are supported (since WSGI does not support non-blocking requests properly). If you callself.flush()
or other asynchronous methods in your request handlers running in aWSGIApplication
, we throw an exception.Example usage:
import tornado.web import tornado.wsgi import wsgiref.simple_server class MainHandler(tornado.web.RequestHandler): def get(self): self.write("Hello, world") if __name__ == "__main__": application = tornado.wsgi.WSGIApplication([ (r"/", MainHandler), ]) server = wsgiref.simple_server.make_server('', 8888, application) server.serve_forever()
See the appengine demo for an example of using this module to run a Tornado app on Google App Engine.
WSGI applications use the same
RequestHandler
class, but not@asynchronous
methods orflush()
. This means that it is not possible to useAsyncHTTPClient
, or thetornado.auth
ortornado.websocket
modules.
-
class
tornado.wsgi.
HTTPRequest
(environ)[source]¶ Mimics
tornado.httpserver.HTTPRequest
for WSGI applications.Parses the given WSGI environment to construct the request.
A dictionary of Cookie.Morsel objects.
WSGIContainer¶
-
class
tornado.wsgi.
WSGIContainer
(wsgi_application)[source]¶ Makes a WSGI-compatible function runnable on Tornado’s HTTP server.
Wrap a WSGI function in a
WSGIContainer
and pass it toHTTPServer
to run it. For example:def simple_app(environ, start_response): status = "200 OK" response_headers = [("Content-type", "text/plain")] start_response(status, response_headers) return ["Hello world!\n"] container = tornado.wsgi.WSGIContainer(simple_app) http_server = tornado.httpserver.HTTPServer(container) http_server.listen(8888) tornado.ioloop.IOLoop.instance().start()
This class is intended to let other frameworks (Django, web.py, etc) run on the Tornado HTTP server and I/O loop.
The
tornado.web.FallbackHandler
class is often useful for mixing Tornado and WSGI apps in the same server. See https://github.com/bdarnell/django-tornado-demo for a complete example.-
static
environ
(request)[source]¶ Converts a
tornado.httpserver.HTTPRequest
to a WSGI environment.
-
static