org.springframework.web.server.handler.FilteringWebHandler Maven / Gradle / Ivy
/*
* Copyright 2002-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.server.handler;
import java.util.Arrays;
import java.util.List;
import reactor.core.publisher.Mono;
import org.springframework.util.CollectionUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebHandler;
/**
* WebHandler decorator that invokes a chain of {@link WebFilter}s before the
* delegate {@link WebHandler}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
public class FilteringWebHandler extends WebHandlerDecorator {
private final WebFilter[] filters;
/**
* Constructor.
* @param filters the chain of filters
*/
public FilteringWebHandler(WebHandler webHandler, List filters) {
super(webHandler);
this.filters = !CollectionUtils.isEmpty(filters) ?
filters.toArray(new WebFilter[filters.size()]) : new WebFilter[0];
}
/**
* Return a read-only list of the configured filters.
*/
public List getFilters() {
return Arrays.asList(this.filters);
}
@Override
public Mono handle(ServerWebExchange exchange) {
return this.filters.length != 0 ?
new DefaultWebFilterChain(getDelegate(), this.filters).filter(exchange) :
super.handle(exchange);
}
}