1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/cookie/RFC2965DomainAttributeHandler.java $ 3 * $Revision: 653041 $ 4 * $Date: 2008-05-03 03:39:28 -0700 (Sat, 03 May 2008) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.impl.cookie; 33 34 import java.util.Locale; 35 36 import org.apache.http.cookie.ClientCookie; 37 import org.apache.http.cookie.Cookie; 38 import org.apache.http.cookie.CookieAttributeHandler; 39 import org.apache.http.cookie.CookieOrigin; 40 import org.apache.http.cookie.MalformedCookieException; 41 import org.apache.http.cookie.SetCookie; 42 43 /** 44 * <tt>"Domain"</tt> cookie attribute handler for RFC 2965 cookie spec. 45 * 46 * @author jain.samit (at) gmail.com (Samit Jain) 47 * 48 * @since 3.1 49 */ 50 public class RFC2965DomainAttributeHandler implements CookieAttributeHandler { 51 52 public RFC2965DomainAttributeHandler() { 53 super(); 54 } 55 56 /** 57 * Parse cookie domain attribute. 58 */ 59 public void parse(final SetCookie cookie, String domain) 60 throws MalformedCookieException { 61 if (cookie == null) { 62 throw new IllegalArgumentException("Cookie may not be null"); 63 } 64 if (domain == null) { 65 throw new MalformedCookieException( 66 "Missing value for domain attribute"); 67 } 68 if (domain.trim().length() == 0) { 69 throw new MalformedCookieException( 70 "Blank value for domain attribute"); 71 } 72 domain = domain.toLowerCase(Locale.ENGLISH); 73 if (!domain.startsWith(".")) { 74 // Per RFC 2965 section 3.2.2 75 // "... If an explicitly specified value does not start with 76 // a dot, the user agent supplies a leading dot ..." 77 // That effectively implies that the domain attribute 78 // MAY NOT be an IP address of a host name 79 domain = '.' + domain; 80 } 81 cookie.setDomain(domain); 82 } 83 84 /** 85 * Performs domain-match as defined by the RFC2965. 86 * <p> 87 * Host A's name domain-matches host B's if 88 * <ol> 89 * <ul>their host name strings string-compare equal; or</ul> 90 * <ul>A is a HDN string and has the form NB, where N is a non-empty 91 * name string, B has the form .B', and B' is a HDN string. (So, 92 * x.y.com domain-matches .Y.com but not Y.com.)</ul> 93 * </ol> 94 * 95 * @param host host name where cookie is received from or being sent to. 96 * @param domain The cookie domain attribute. 97 * @return true if the specified host matches the given domain. 98 */ 99 public boolean domainMatch(String host, String domain) { 100 boolean match = host.equals(domain) 101 || (domain.startsWith(".") && host.endsWith(domain)); 102 103 return match; 104 } 105 106 /** 107 * Validate cookie domain attribute. 108 */ 109 public void validate(final Cookie cookie, final CookieOrigin origin) 110 throws MalformedCookieException { 111 if (cookie == null) { 112 throw new IllegalArgumentException("Cookie may not be null"); 113 } 114 if (origin == null) { 115 throw new IllegalArgumentException("Cookie origin may not be null"); 116 } 117 String host = origin.getHost().toLowerCase(Locale.ENGLISH); 118 if (cookie.getDomain() == null) { 119 throw new MalformedCookieException("Invalid cookie state: " + 120 "domain not specified"); 121 } 122 String cookieDomain = cookie.getDomain().toLowerCase(Locale.ENGLISH); 123 124 if (cookie instanceof ClientCookie 125 && ((ClientCookie) cookie).containsAttribute(ClientCookie.DOMAIN_ATTR)) { 126 // Domain attribute must start with a dot 127 if (!cookieDomain.startsWith(".")) { 128 throw new MalformedCookieException("Domain attribute \"" + 129 cookie.getDomain() + "\" violates RFC 2109: domain must start with a dot"); 130 } 131 132 // Domain attribute must contain at least one embedded dot, 133 // or the value must be equal to .local. 134 int dotIndex = cookieDomain.indexOf('.', 1); 135 if (((dotIndex < 0) || (dotIndex == cookieDomain.length() - 1)) 136 && (!cookieDomain.equals(".local"))) { 137 throw new MalformedCookieException( 138 "Domain attribute \"" + cookie.getDomain() 139 + "\" violates RFC 2965: the value contains no embedded dots " 140 + "and the value is not .local"); 141 } 142 143 // The effective host name must domain-match domain attribute. 144 if (!domainMatch(host, cookieDomain)) { 145 throw new MalformedCookieException( 146 "Domain attribute \"" + cookie.getDomain() 147 + "\" violates RFC 2965: effective host name does not " 148 + "domain-match domain attribute."); 149 } 150 151 // effective host name minus domain must not contain any dots 152 String effectiveHostWithoutDomain = host.substring( 153 0, host.length() - cookieDomain.length()); 154 if (effectiveHostWithoutDomain.indexOf('.') != -1) { 155 throw new MalformedCookieException("Domain attribute \"" 156 + cookie.getDomain() + "\" violates RFC 2965: " 157 + "effective host minus domain may not contain any dots"); 158 } 159 } else { 160 // Domain was not specified in header. In this case, domain must 161 // string match request host (case-insensitive). 162 if (!cookie.getDomain().equals(host)) { 163 throw new MalformedCookieException("Illegal domain attribute: \"" 164 + cookie.getDomain() + "\"." 165 + "Domain of origin: \"" 166 + host + "\""); 167 } 168 } 169 } 170 171 /** 172 * Match cookie domain attribute. 173 */ 174 public boolean match(final Cookie cookie, final CookieOrigin origin) { 175 if (cookie == null) { 176 throw new IllegalArgumentException("Cookie may not be null"); 177 } 178 if (origin == null) { 179 throw new IllegalArgumentException("Cookie origin may not be null"); 180 } 181 String host = origin.getHost().toLowerCase(Locale.ENGLISH); 182 String cookieDomain = cookie.getDomain(); 183 184 // The effective host name MUST domain-match the Domain 185 // attribute of the cookie. 186 if (!domainMatch(host, cookieDomain)) { 187 return false; 188 } 189 // effective host name minus domain must not contain any dots 190 String effectiveHostWithoutDomain = host.substring( 191 0, host.length() - cookieDomain.length()); 192 return effectiveHostWithoutDomain.indexOf('.') == -1; 193 } 194 195 }
