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	Installs Express middleware which is called before a Keystone admin UI route is executed. (i.e. routes starting with /keystone)
pre:adminroutes	Installs Express middleware which is called before the route handlers in the admin UI are executed (i.e. after the admin UI-specific middleware is configured but before routes are matched)
pre:routes	Installs Express middleware which is called before each developer defined route is executed. (i.e. the routes you define besides the /keystone generated ones)
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.