Middleware<R> class

The descendant of this class can be used as a request or response middleware. For the request middleware specify the R generic type as aRestRowRequest, for the response middleware specify the R generic type as a RestRowResponse After extending from the Middleware override the onNext async method and implement your custom logic, after call the next method

await nextMiddleware.next(row)

which will call the next middleware in the chain. Here is the example of request middleware

class CustomMiddleware extends RestMiddleware<RestRowRequest> {

 @override
 Future<RestRowRequest> onNext(
     RestRowRequest row, RestMiddleware<RestRowRequest> nextMiddleware) async {
   // Your logic here
   return await nextMiddleware.next(row);
 }
}

You can also check the RequestLogger and ResponseLogger for more examples.

Implementers

• RequestLogger
• ResponseLogger

Constructors

Middleware()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

addNext(Middleware<R> middleWare) → void

This method adds a middleware to the chain. This method is called by the Rest library, no need to call it manually, instead use RestClientBuilder.addRequestMiddleware and RestClientBuilder.addResponseMiddleware

next(R row) → Future<R>

This method will call next middleware in the chain. Initially this method get called by the RestClient.

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

onNext(R row, Middleware<R> nextMiddleware) → Future<R>

Override this method and implement your custom logic inside it. After call await nextMiddleware.next(row) to run the next middleware in the chain.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited