类型参数:
T - the type of the handler function to filter
R - the type of the response of the function
函数接口:
这是一个函数接口, 因此可用作 lambda 表达式或方法引用的赋值目标。
```
@FunctionalInterface
public interface HandlerFilterFunction<T extends ServerResponse,R extends ServerResponse>
```
Represents a function that filters a handler function.
从以下版本开始:
5.2
作者:
Arjen Poutsma
另请参阅:
RouterFunction.filter(HandlerFilterFunction)

方法概要

所有方法静态方法实例方法抽象方法默认方法
修饰符和类型	方法	说明
`default HandlerFilterFunction<T,R>`	`andThen(HandlerFilterFunction<T,T> after)`	Return a composed filter function that first applies this filter, and then applies the `after` filter.
`default HandlerFunction<R>`	`apply(HandlerFunction<T> handler)`	Apply this filter to the given handler function, resulting in a filtered handler function.
`R`	`filter(ServerRequest request, HandlerFunction<T> next)`	Apply this filter to the given handler function.
`static <T extends ServerResponse> HandlerFilterFunction<T,T>`	`ofErrorHandler(Predicate<Throwable> predicate, BiFunction<Throwable,ServerRequest,T> errorHandler)`	Adapt the given predicate and response provider function to a filter function that returns a `ServerResponse` on a given exception.
`static <T extends ServerResponse> HandlerFilterFunction<T,T>`	`ofRequestProcessor(Function<ServerRequest,ServerRequest> requestProcessor)`	Adapt the given request processor function to a filter function that only operates on the `ServerRequest`.
`static <T extends ServerResponse,R extends ServerResponse> HandlerFilterFunction<T,R>`	`ofResponseProcessor(BiFunction<ServerRequest,T,R> responseProcessor)`	Adapt the given response processor function to a filter function that only operates on the `ServerResponse`.

- 方法详细资料
  - filter
```
R filter(ServerRequest request,
         HandlerFunction<T> next)
  throws Exception
```
    Apply this filter to the given handler function. The given handler function represents the next entity in the chain, and can be invoked in order to proceed to this entity, or not invoked to block the chain.
    参数:
    request - the request
    next - the next handler or filter function in the chain
    返回:
    the filtered response
    抛出:
    Exception
  - andThen
```
default HandlerFilterFunction<T,R> andThen(HandlerFilterFunction<T,T> after)
```
    Return a composed filter function that first applies this filter, and then applies the after filter.
    参数:
    after - the filter to apply after this filter is applied
    返回:
    a composed filter that first applies this function and then applies the after function
  - apply
```
default HandlerFunction<R> apply(HandlerFunction<T> handler)
```
    Apply this filter to the given handler function, resulting in a filtered handler function.
    参数:
    handler - the handler function to filter
    返回:
    the filtered handler function
  - ofRequestProcessor
```
static <T extends ServerResponse> HandlerFilterFunction<T,T> ofRequestProcessor(Function<ServerRequest,ServerRequest> requestProcessor)
```
    Adapt the given request processor function to a filter function that only operates on the ServerRequest.
    参数:
    requestProcessor - the request processor
    返回:
    the filter adaptation of the request processor
  - ofResponseProcessor
```
static <T extends ServerResponse,R extends ServerResponse> HandlerFilterFunction<T,R> ofResponseProcessor(BiFunction<ServerRequest,T,R> responseProcessor)
```
    Adapt the given response processor function to a filter function that only operates on the ServerResponse.
    参数:
    responseProcessor - the response processor
    返回:
    the filter adaptation of the request processor
  - ofErrorHandler
```
static <T extends ServerResponse> HandlerFilterFunction<T,T> ofErrorHandler(Predicate<Throwable> predicate,
                                                                                  BiFunction<Throwable,ServerRequest,T> errorHandler)
```
    Adapt the given predicate and response provider function to a filter function that returns a ServerResponse on a given exception.
    参数:
    predicate - the predicate to match an exception
    errorHandler - the response provider
    返回:
    the filter adaption of the error handler

接口 HandlerFilterFunction<T extends ServerResponse,​R extends ServerResponse>

方法概要

方法详细资料

filter

andThen

apply

ofRequestProcessor

ofResponseProcessor

ofErrorHandler

接口 HandlerFilterFunction<T extends ServerResponse,R extends ServerResponse>