FlashMessagingMiddleware class

Middleware that manages the lifecycle of flashed session state across requests.

This middleware is responsible for clearing temporary session data after it has survived the expected number of request cycles. In practice, this supports common redirect-and-render flows where flashed data needs to be available briefly and then removed.

Behavior:

  • skips flash lifecycle handling for /api/ routes
  • checks the internal _flashTrips counter in the container
  • clears flashed messages, errors, and old input after two trips
  • advances the trip counter from 1 to 2 when needed

Example:

router.get(
  '/dashboard',
  handler: (request) async => dashboardController.index(request),
  middleware: [FlashMessaging.middleware],
);

Constructors

FlashMessagingMiddleware()

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

middleware(HttpRequest request, Future<void> next()) → Future
Processes flash-message lifecycle state for the current request.