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Crafting Rails 4 Applications, 2nd Edition
book

Crafting Rails 4 Applications, 2nd Edition

by Jose Valim
November 2013
Intermediate to advanced content levelIntermediate to advanced
200 pages
4h 31m
English
Pragmatic Bookshelf
Content preview from Crafting Rails 4 Applications, 2nd Edition

Middleware Stacks

Although web-server adapters and the Rack application API revolutionized the way Ruby web frameworks are developed, you’re probably more familiar with another term related to Rack: middleware.

A middleware wraps around a Rack application. It lets us manipulate both the request sent down to the application and the response the application returns. By piling up many middleware before an application, we create a middleware stack. Any request to an action in a Rails controller passes through three middleware stacks, as the following figure shows.

images/7_stacks.png
Figure 15. The middleware stacks involved in a request to an action in a Rails controller ...
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Publisher Resources

ISBN: 9781941222331Errata