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The Web Server Gateway Interface. It defines a simple and universal interface between web servers and web applications or frameworks for the [[Python programming language]].
==Idea==
Python currently boasts a wide variety of web application frameworks. This can be a problem for new Python users, because generally speaking, their choice of web framework will limit their choice of usable web servers, and vice versa.
WSGI proposes a simple and universal interface between web servers and web applications or frameworks.
==Specification Overview==
The WSGI interface has two sides: the "server" or "gateway" side, and the "application" or "framework" side. The server side invokes a callable object that is provided by the application side. Additionally WSGI provides middlewares, components that play both sides.
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* Perform content postprocessing, such as applying XSL stylesheets
==Example Application==
A WSGI compatible "[[Hello World]]" application:
<pre>
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</pre>
==WSGI compatible Applications and Frameworks==
There are numerous [[Web application framework]]s supporting WSGI:
* [[Django web framework|Django]]
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* [http://wsgiarea.pocoo.org/colubrid/ Colubrid]
==Wrappers==
The server or gateway invokes the application callable once for each request it receives from an HTTP client, that is directed at the application.
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