001package org.eclipse.aether.transport.http; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import org.apache.http.HttpResponse; 023import org.apache.http.client.HttpResponseException; 024import org.apache.http.client.methods.HttpUriRequest; 025 026import java.util.Map; 027 028/** 029 * A component extracting included checksums from response of artifact request. 030 * 031 * @since 1.8.0 032 */ 033public abstract class ChecksumExtractor 034{ 035 /** 036 * Prepares request, if needed. 037 */ 038 public void prepareRequest( HttpUriRequest request ) 039 { 040 // nothing 041 } 042 043 /** 044 * May control is request to be retried with checksum extractors disabled. 045 */ 046 public boolean retryWithoutExtractor( HttpResponseException exception ) 047 { 048 return false; // nothing, usually tied to prepareRequest 049 } 050 051 /** 052 * Tries to extract checksums from response headers, if present, otherwise returns {@code null}. 053 */ 054 public abstract Map<String, String> extractChecksums( HttpResponse response ); 055}