Middleware

Middleware are functions that run before or after particular actions, normally to perform an authentication action, or to add extra information. For a full explanation of middleware, we recommend reading the express documentation on middleware.

Keystone includes some middleware automatically, to handle login and auth.

All of keystone’ middleware aside from the pre:render middleware are intended to run only within keystone-specific routes, and are added to the express router after your own routes have been registered.

In keystone, there are a number of middleware that can be added globally, which will then be called at defined times during routing. These can be passed into the set method. These are:

name	call time
pre:static
pre:logger
pre:bodyparser
pre:session
pre:admin
pre:routes
pre:render	Called before a keystone view is rendered.
updates
signin	Called before a user signs in to the keystone admin UI and the user is returned a view.
signout	Called before a user signs out of the admin UI and the user is returned a view.