001/* 002 * Copyright 2002-2018 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.client; 018 019import java.io.IOException; 020import java.net.URI; 021 022import org.springframework.http.HttpMethod; 023 024/** 025 * Wrapper for a {@link ClientHttpRequestFactory} that buffers 026 * all outgoing and incoming streams in memory. 027 * 028 * <p>Using this wrapper allows for multiple reads of the 029 * {@linkplain ClientHttpResponse#getBody() response body}. 030 * 031 * @author Arjen Poutsma 032 * @since 3.1 033 */ 034public class BufferingClientHttpRequestFactory extends AbstractClientHttpRequestFactoryWrapper { 035 036 /** 037 * Create a buffering wrapper for the given {@link ClientHttpRequestFactory}. 038 * @param requestFactory the target request factory to wrap 039 */ 040 public BufferingClientHttpRequestFactory(ClientHttpRequestFactory requestFactory) { 041 super(requestFactory); 042 } 043 044 045 @Override 046 protected ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod, ClientHttpRequestFactory requestFactory) 047 throws IOException { 048 049 ClientHttpRequest request = requestFactory.createRequest(uri, httpMethod); 050 if (shouldBuffer(uri, httpMethod)) { 051 return new BufferingClientHttpRequestWrapper(request); 052 } 053 else { 054 return request; 055 } 056 } 057 058 /** 059 * Indicates whether the request/response exchange for the given URI and method 060 * should be buffered in memory. 061 * <p>The default implementation returns {@code true} for all URIs and methods. 062 * Subclasses can override this method to change this behavior. 063 * @param uri the URI 064 * @param httpMethod the method 065 * @return {@code true} if the exchange should be buffered; {@code false} otherwise 066 */ 067 protected boolean shouldBuffer(URI uri, HttpMethod httpMethod) { 068 return true; 069 } 070 071}