/*
* Copyright 2002-2016 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.web.server.NotAcceptableStatusException;
import org.springframework.web.server.ServerWebExchange;
/**
* A {@link RequestedContentTypeResolver} that checks the 'Accept' request header.
*
* @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 mediaTypes;
}
catch (InvalidMediaTypeException ex) {
String value = exchange.getRequest().getHeaders().getFirst("Accept");
throw new NotAcceptableStatusException(
"Could not parse 'Accept' header [" + value + "]: " + ex.getMessage());
}
}
}