001/* 002 * Copyright 2002-2019 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017package org.springframework.http.codec; 018 019import java.util.Map; 020 021import org.springframework.core.ResolvableType; 022import org.springframework.core.codec.Hints; 023import org.springframework.core.codec.ResourceDecoder; 024import org.springframework.core.io.Resource; 025import org.springframework.http.server.reactive.ServerHttpRequest; 026import org.springframework.http.server.reactive.ServerHttpResponse; 027import org.springframework.util.StringUtils; 028 029/** 030 * {@code HttpMessageReader} that wraps and delegates to a {@link ResourceDecoder} 031 * that extracts the filename from the {@code "Content-Disposition"} header, if 032 * available, and passes it as the {@link ResourceDecoder#FILENAME_HINT}. 033 * 034 * @author Rossen Stoyanchev 035 * @since 5.2 036 */ 037public class ResourceHttpMessageReader extends DecoderHttpMessageReader<Resource> { 038 039 public ResourceHttpMessageReader() { 040 super(new ResourceDecoder()); 041 } 042 043 public ResourceHttpMessageReader(ResourceDecoder resourceDecoder) { 044 super(resourceDecoder); 045 } 046 047 048 @Override 049 protected Map<String, Object> getReadHints(ResolvableType actualType, ResolvableType elementType, 050 ServerHttpRequest request, ServerHttpResponse response) { 051 052 String name = request.getHeaders().getContentDisposition().getFilename(); 053 return StringUtils.hasText(name) ? Hints.from(ResourceDecoder.FILENAME_HINT, name) : Hints.none(); 054 } 055 056}