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.Header; 023import org.apache.http.HttpResponse; 024 025import javax.inject.Named; 026import javax.inject.Singleton; 027import java.util.HashMap; 028import java.util.Map; 029 030/** 031 * A component extracting {@code x-} non-standard style checksums from response headers. 032 * Tried headers (in order): 033 * <ul> 034 * <li>{@code x-checksum-sha1} - Maven Central and other CDNs</li> 035 * <li>{@code x-checksum-md5} - Maven Central and other CDNs</li> 036 * <li>{@code x-goog-meta-checksum-sha1} - GCS</li> 037 * <li>{@code x-goog-meta-checksum-md5} - GCS</li> 038 * </ul> 039 * 040 * @since 1.8.0 041 */ 042@Singleton 043@Named( XChecksumChecksumExtractor.NAME ) 044public class XChecksumChecksumExtractor 045 extends ChecksumExtractor 046{ 047 public static final String NAME = "x-checksum"; 048 049 @Override 050 public Map<String, String> extractChecksums( HttpResponse response ) 051 { 052 String value; 053 HashMap<String, String> result = new HashMap<>(); 054 // Central style: x-checksum-sha1: c74edb60ca2a0b57ef88d9a7da28f591e3d4ce7b 055 value = extractChecksum( response, "x-checksum-sha1" ); 056 if ( value != null ) 057 { 058 result.put( "SHA-1", value ); 059 } 060 // Central style: x-checksum-md5: 9ad0d8e3482767c122e85f83567b8ce6 061 value = extractChecksum( response, "x-checksum-md5" ); 062 if ( value != null ) 063 { 064 result.put( "MD5", value ); 065 } 066 if ( !result.isEmpty() ) 067 { 068 return result; 069 } 070 // Google style: x-goog-meta-checksum-sha1: c74edb60ca2a0b57ef88d9a7da28f591e3d4ce7b 071 value = extractChecksum( response, "x-goog-meta-checksum-sha1" ); 072 if ( value != null ) 073 { 074 result.put( "SHA-1", value ); 075 } 076 // Central style: x-goog-meta-checksum-sha1: 9ad0d8e3482767c122e85f83567b8ce6 077 value = extractChecksum( response, "x-goog-meta-checksum-md5" ); 078 if ( value != null ) 079 { 080 result.put( "MD5", value ); 081 } 082 083 return result.isEmpty() ? null : result; 084 } 085 086 private String extractChecksum( HttpResponse response, String name ) 087 { 088 Header header = response.getFirstHeader( name ); 089 return header != null ? header.getValue() : null; 090 } 091}