Middleware

Middleware gives you the possibility to run code before a request is complete and based on the incoming request, you can rewrite, redirect, add headers or even stream HTML. It can be used for anything that shares logic for a set of pages, including:

Authentication

Bot protection

Redirects and rewrites

Handling unsupported browsers

Feature flags and A/B tests

Server-side analytics

Advanced i18n routing requirements

Logging

• And more!