Chapter 17. Pylons' Internal Architecture

Now that you've seen what WSGI is and how it works, in this chapter you'll look at how Pylons' architecture is built around the opportunities WSGI provides. Before getting into too much detail, though, it is helpful to put the Pylons architecture in context by looking at how it came about in the first place.

A Bit of History

All web frameworks are fundamentally involved in the process of responding to HTTP requests and generating HTTP responses using APIs that are convenient for developers. These APIs might provide session handling, cookie handling, E-Tag caching, error reporting, or other features that read information from the HTTP request and affect the HTTP response. It turns out that the vast majority ...

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