Authentication Middleware

Definitions

1. Middleware that intercepts requests to verify identity, parse credentials, establish user context, or reject unauthenticated calls before application logic runs. It is a common pattern in web frameworks where auth checks need to happen consistently across many routes.

   In plain English: Middleware that checks who a request is coming from before the app handles it.

   Example: "The bug was in the authentication middleware, which accepted expired tokens when the clock skew exceeded the default tolerance."

Related Terms

• JWT
• PWA
• iframe
• progressive web app
• Ruby
• Media Query
• SVG
• Authentication Handler
• Authorization Middleware
• Custom Middleware