Looking for a diagram to explain WSGI [closed]

Question

To help further my understanding of WSGI I'm looking for a diagram which explains the flow of an application, from webserver (eg. apache) through a number of middlewares to "code" (as in, the print "hello world" bit).

I've read various articles regarding WSGI from wsgi.org, but it's still not "clicking" for me and as for diagrams Google isn't bringing anything useful back except this for django which, while interesting, is expecting the user to understand how middleware links-up and such.

Since "a picture is worth a thousand words", are there any diagrams out there which get a bit lower/more simplistic than this?

Answer 1

As I gained nothing by looking at Ian's fancy tubes I decided to draw a diagram myself. I hope it will help someone understand how WSGI flow works. As long as you have suggestions how to make it better I'm open to modify it. It was created with LUCIDCHART webapp. The original diagram you can find here and the high quality PNG is here.