/* * Copyright 2002-2018 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.reactive.accept; import java.util.List; import org.springframework.http.InvalidMediaTypeException; import org.springframework.http.MediaType; import org.springframework.util.CollectionUtils; import org.springframework.web.server.NotAcceptableStatusException; import org.springframework.web.server.ServerWebExchange; /** * Resolver that looks at the 'Accept' header of the request. * * @author Rossen Stoyanchev * @since 5.0 */ public class HeaderContentTypeResolver implements RequestedContentTypeResolver { @Override public List<MediaType> resolveMediaTypes(ServerWebExchange exchange) throws NotAcceptableStatusException { try { List<MediaType> mediaTypes = exchange.getRequest().getHeaders().getAccept(); MediaType.sortBySpecificityAndQuality(mediaTypes); return (!CollectionUtils.isEmpty(mediaTypes) ? mediaTypes : MEDIA_TYPE_ALL_LIST); } catch (InvalidMediaTypeException ex) { String value = exchange.getRequest().getHeaders().getFirst("Accept"); throw new NotAcceptableStatusException( "Could not parse 'Accept' header [" + value + "]: " + ex.getMessage()); } } }