Filter

All Superinterfaces:

java.util.function.Function<HttpHandler,HttpHandler>

All Known Implementing Classes:

AddSeleniumUserAgent, DumpHttpExchangeFilter, RetryRequest

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface Filter
extends java.util.function.Function<HttpHandler,HttpHandler>
```
Can be wrapped around an HttpHandler in order to either modify incoming HttpRequests or outgoing HttpResponses using the well-known "Filter" pattern. This is very similar to the Servlet spec's javax.servlet.Filter, but takes advantage of lambdas:
```
 Filter filter = next -> {
   return req -> {
     req.addHeader("cheese", "brie");
     HttpResponse res = next.apply(req);
     res.addHeader("vegetable", "peas");
     return res;
   };
 }
 
```
Because each filter returns an HttpHandler, it's easy to do processing before, or after each request, as well as short-circuit things if necessary.

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default HttpHandler`	`andFinally(HttpHandler end)`
`default Routable`	`andFinally(Routable end)`
`default Filter`	`andThen(Filter next)`

Methods inherited from interface java.util.function.Function
andThen, apply, compose

Method Detail

andThen

default Filter andThen(Filter next)

andFinally

default HttpHandler andFinally(HttpHandler end)

andFinally

default Routable andFinally(Routable end)