This article illustrates how to install and test Tornado a scalable, non-blocking web server and web application framework useful to write web application written in Python.

"Because it is non-blocking and uses epoll or kqueue, it can handle thousands of simultaneous standing connections, which means the framework is ideal for real-time web services".

Install Tornado on Aria, Terra or FOX boards

Download and save the file tornado-x.x.x.tar.gz on the CORE9G25 board microSD which contains the latest stable version of Tornado from the following link:

Untar the archive file:

debarm:~# tar xvzf tornado-x.x.x.tar.gz

Move into the new directory and install Tornado by typing:

debarm:~# cd tornado-x.x.x                                                      
debarm:~/tornado-x.x.x# python install

Run your first web server

This is the basic example to build a simple web server which serves static html file., The web server, Position: CD://Debian/playground/python/tornado/

import tornado.ioloop
import tornado.web

application = tornado.web.Application([
	(r"/(.*)", tornado.web.StaticFileHandler, {"path": ".","default_filename": "index.html"})

if __name__ == "__main__":

index.html, A very basic static html file. Position: CD://Debian/playground/python/tornado/index.html

I'm your default index page
  • A binary favicon.ico file

Run it by typing:

debarm:~/playground/python/tornado# python

Open a browser on your PC and take a look to the Tornado web page using this URL:

Let's try now to access the default web pages available on /var/www with our new small web server .

Stop by typing ctrl-c and change this line:

(r"/(.*)", tornado.web.StaticFileHandler, {"path": ".","default_filename": "index.html"})


(r"/(.*)", tornado.web.StaticFileHandler, {"path": "/var/www","default_filename": "index.html"})

In this way we have changed the default path. Start again the web server and reload the web page on your browser.

Related links

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The Acme Systems srl provides this Debian system development and user manual.
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