Getting Started

Links

Links

Install

Make sure you have installed Easy Install!
If you are running a python version less than 2.5:
```
easy_install wsgiref
```
Run the Hello World Sample (see below).

Sample

Hello World with WSGI

Install python 2.5 (or above):

Hello World

Create and run this python script:

from wsgiref.simple_server import make_server, demo_app

httpd = make_server('', 8000, demo_app)
print "Serving HTTP on port 8000..."

httpd.serve_forever()

Open the page, http://localhost:8000/

Simple App

Create and run this in the same way:

class SimpleApp:
    """Produce the same output, but using a class
    """
    def __init__(self, environ, start_response):
        self.environ = environ
        self.start = start_response

    def __iter__(self):
        status = '200 OK'
        response_headers = [('Content-type','text/plain')]
        self.start(status, response_headers)
        yield 'My Own Hello world!\n'

from wsgiref.simple_server import make_server, demo_app

httpd = make_server('', 8000, SimpleApp)

print "Serving HTTP on port 8000..."

httpd.serve_forever()

Getting Started

Why WSGI?

Install Easy Install.

Install the components:

easy_install yaro selector memento static

Checkout the sample application from Subversion: https://weezy/svn/learn/python/wsgi/wsgitest

Run the application:

\development\learn\python\wsgi\wsgitest\run.py

View the application at http://localhost:8000/
While it’s running, try changing the string returned by controllers.index and refresh the page. Your change is reflected automatically and you didn’t need to restart the application.

Memento accomplishes this by forcing Python to re-import all modules on each HTTP request. This is obviously a bad idea in a production setting but it’s great for development.

This application uses the following components:
yaro Yet Another Request Object (for WSGI).
selector WSGI middleware for “RESTful” mapping of URL paths to WSGI applications.
memento WSGI middleware for per request code reloading.

Web Server - Apache, lighttpd etc

See Apache