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Tornado Web Server
==================
.. image:: https://badges.gitter.im/Join%20Chat.svg
:alt: Join the chat at https://gitter.im/tornadoweb/tornado
:target: https://gitter.im/tornadoweb/tornado?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge
`Tornado <http://www.tornadoweb.org>`_ is a Python web framework and
asynchronous networking library, originally developed at `FriendFeed
<http://friendfeed.com>`_. By using non-blocking network I/O, Tornado
can scale to tens of thousands of open connections, making it ideal for
`long polling <http://en.wikipedia.org/wiki/Push_technology#Long_Polling>`_,
`WebSockets <http://en.wikipedia.org/wiki/WebSocket>`_, and other
applications that require a long-lived connection to each user.
Hello, world
------------
Here is a simple "Hello, world" example web app for Tornado:
.. code-block:: python
import asyncio
import tornado
class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Hello, world")
def make_app():
return tornado.web.Application([
(r"/", MainHandler),
])
async def main():
app = make_app()
app.listen(8888)
await asyncio.Event().wait()
if __name__ == "__main__":
asyncio.run(main())
This example does not use any of Tornado's asynchronous features; for
that see this `simple chat room
<https://github.com/tornadoweb/tornado/tree/stable/demos/chat>`_.
Documentation
-------------
Documentation and links to additional resources are available at
https://www.tornadoweb.org
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