.NET Core · Module 4 of 10

Middleware pipeline

Process every request through ordered middleware.

📖 Key ideas

Middleware components run in order for each request.
Common: UseHttpsRedirection, UseStaticFiles, UseRouting, UseAuthentication, UseAuthorization.
Custom middleware: app.Use(async (ctx, next) => { ...; await next(); }).
Order matters: authentication before authorization.
Exception handling middleware should come first.

💡 Real-life example: Middleware is a relay race: each runner (component) does its part and passes the baton (request).

MiddlewareComponent in the request pipeline

next()Calls the next middleware

UseAuthenticationIdentifies the user

UseAuthorizationChecks permissions