001package org.eclipse.aether.util.repository; 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 java.util.ArrayList; 023import java.util.HashMap; 024import java.util.List; 025import java.util.Locale; 026import java.util.Map; 027import static java.util.Objects.requireNonNull; 028import java.util.StringTokenizer; 029import java.util.regex.Pattern; 030 031import org.eclipse.aether.repository.Proxy; 032import org.eclipse.aether.repository.ProxySelector; 033import org.eclipse.aether.repository.RemoteRepository; 034 035/** 036 * A simple proxy selector that selects the first matching proxy from a list of configured proxies. 037 */ 038public final class DefaultProxySelector 039 implements ProxySelector 040{ 041 042 private final List<ProxyDef> proxies = new ArrayList<>(); 043 044 /** 045 * Adds the specified proxy definition to the selector. Proxy definitions are ordered, the first matching proxy for 046 * a given repository will be used. 047 * 048 * @param proxy The proxy definition to add, must not be {@code null}. 049 * @param nonProxyHosts The list of (case-insensitive) host names to exclude from proxying, may be {@code null}. 050 * @return This proxy selector for chaining, never {@code null}. 051 */ 052 public DefaultProxySelector add( Proxy proxy, String nonProxyHosts ) 053 { 054 requireNonNull( proxy, "proxy cannot be null" ); 055 proxies.add( new ProxyDef( proxy, nonProxyHosts ) ); 056 057 return this; 058 } 059 060 public Proxy getProxy( RemoteRepository repository ) 061 { 062 requireNonNull( repository, "repository cannot be null" ); 063 Map<String, ProxyDef> candidates = new HashMap<>(); 064 065 String host = repository.getHost(); 066 for ( ProxyDef proxy : proxies ) 067 { 068 if ( !proxy.nonProxyHosts.isNonProxyHost( host ) ) 069 { 070 String key = proxy.proxy.getType().toLowerCase( Locale.ENGLISH ); 071 if ( !candidates.containsKey( key ) ) 072 { 073 candidates.put( key, proxy ); 074 } 075 } 076 } 077 078 String protocol = repository.getProtocol().toLowerCase( Locale.ENGLISH ); 079 080 if ( "davs".equals( protocol ) ) 081 { 082 protocol = "https"; 083 } 084 else if ( "dav".equals( protocol ) ) 085 { 086 protocol = "http"; 087 } 088 else if ( protocol.startsWith( "dav:" ) ) 089 { 090 protocol = protocol.substring( "dav:".length() ); 091 } 092 093 ProxyDef proxy = candidates.get( protocol ); 094 if ( proxy == null && "https".equals( protocol ) ) 095 { 096 proxy = candidates.get( "http" ); 097 } 098 099 return ( proxy != null ) ? proxy.proxy : null; 100 } 101 102 static class NonProxyHosts 103 { 104 105 private final Pattern[] patterns; 106 107 NonProxyHosts( String nonProxyHosts ) 108 { 109 List<Pattern> patterns = new ArrayList<>(); 110 if ( nonProxyHosts != null ) 111 { 112 for ( StringTokenizer tokenizer = new StringTokenizer( nonProxyHosts, "|" ); 113 tokenizer.hasMoreTokens(); ) 114 { 115 String pattern = tokenizer.nextToken(); 116 pattern = pattern.replace( ".", "\\." ).replace( "*", ".*" ); 117 patterns.add( Pattern.compile( pattern, Pattern.CASE_INSENSITIVE ) ); 118 } 119 } 120 this.patterns = patterns.toArray( new Pattern[0] ); 121 } 122 123 boolean isNonProxyHost( String host ) 124 { 125 if ( host != null ) 126 { 127 for ( Pattern pattern : patterns ) 128 { 129 if ( pattern.matcher( host ).matches() ) 130 { 131 return true; 132 } 133 } 134 } 135 return false; 136 } 137 138 } 139 140 static class ProxyDef 141 { 142 143 final Proxy proxy; 144 145 final NonProxyHosts nonProxyHosts; 146 147 ProxyDef( Proxy proxy, String nonProxyHosts ) 148 { 149 this.proxy = proxy; 150 this.nonProxyHosts = new NonProxyHosts( nonProxyHosts ); 151 } 152 153 } 154 155}