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Programming Phoenix
book

Programming Phoenix

by Chris McCord, Bruce Tate, Jose Valim
April 2016
Beginner to intermediate content levelBeginner to intermediate
300 pages
6h 58m
English
Pragmatic Bookshelf
Content preview from Programming Phoenix

The Anatomy of a Plug

Before we build our plug, let’s take a deep dive into the Plug library and learn how plugs work from the inside. There are two kinds of plugs: module plugs and function plugs. A function plug is a single function. A module plug is a module that provides two functions with some configuration details. Either way, they work the same.

We have seen both kinds of plugs in use. From the endpoint module in lib/rumbl/endpoint.ex, you can see an example of a module plug:

 plug Plug.Logger

You specify a module plug by providing the module name. In the router, you can see an example of a function plug:

 plug ​:protect_from_forgery

You specify a function plug with the name of the function as an atom. Because a module is just a collection ...

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Publisher Resources

ISBN: 9781680501926Errata Page