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      1 /*
      2  * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk/module-client/src/main/java/org/apache/http/impl/cookie/RFC2109DomainHandler.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 package org.apache.http.impl.cookie;
     32 
     33 import java.util.Locale;
     34 
     35 import org.apache.http.cookie.Cookie;
     36 import org.apache.http.cookie.CookieAttributeHandler;
     37 import org.apache.http.cookie.CookieOrigin;
     38 import org.apache.http.cookie.MalformedCookieException;
     39 import org.apache.http.cookie.SetCookie;
     40 
     41 public class RFC2109DomainHandler implements CookieAttributeHandler {
     42 
     43     public RFC2109DomainHandler() {
     44         super();
     45     }
     46 
     47     public void parse(final SetCookie cookie, final String value)
     48             throws MalformedCookieException {
     49         if (cookie == null) {
     50             throw new IllegalArgumentException("Cookie may not be null");
     51         }
     52         if (value == null) {
     53             throw new MalformedCookieException("Missing value for domain attribute");
     54         }
     55         if (value.trim().length() == 0) {
     56             throw new MalformedCookieException("Blank value for domain attribute");
     57         }
     58         cookie.setDomain(value);
     59     }
     60 
     61     public void validate(final Cookie cookie, final CookieOrigin origin)
     62             throws MalformedCookieException {
     63         if (cookie == null) {
     64             throw new IllegalArgumentException("Cookie may not be null");
     65         }
     66         if (origin == null) {
     67             throw new IllegalArgumentException("Cookie origin may not be null");
     68         }
     69         String host = origin.getHost();
     70         String domain = cookie.getDomain();
     71         if (domain == null) {
     72             throw new MalformedCookieException("Cookie domain may not be null");
     73         }
     74         if (!domain.equals(host)) {
     75             int dotIndex = domain.indexOf('.');
     76             if (dotIndex == -1) {
     77                 throw new MalformedCookieException("Domain attribute \""
     78                         + domain
     79                         + "\" does not match the host \""
     80                         + host + "\"");
     81             }
     82             // domain must start with dot
     83             if (!domain.startsWith(".")) {
     84                 throw new MalformedCookieException("Domain attribute \""
     85                     + domain
     86                     + "\" violates RFC 2109: domain must start with a dot");
     87             }
     88             // domain must have at least one embedded dot
     89             dotIndex = domain.indexOf('.', 1);
     90             if (dotIndex < 0 || dotIndex == domain.length() - 1) {
     91                 throw new MalformedCookieException("Domain attribute \""
     92                     + domain
     93                     + "\" violates RFC 2109: domain must contain an embedded dot");
     94             }
     95             host = host.toLowerCase(Locale.ENGLISH);
     96             if (!host.endsWith(domain)) {
     97                 throw new MalformedCookieException(
     98                     "Illegal domain attribute \"" + domain
     99                     + "\". Domain of origin: \"" + host + "\"");
    100             }
    101             // host minus domain may not contain any dots
    102             String hostWithoutDomain = host.substring(0, host.length() - domain.length());
    103             if (hostWithoutDomain.indexOf('.') != -1) {
    104                 throw new MalformedCookieException("Domain attribute \""
    105                     + domain
    106                     + "\" violates RFC 2109: host minus domain may not contain any dots");
    107             }
    108         }
    109     }
    110 
    111     public boolean match(final Cookie cookie, final CookieOrigin origin) {
    112         if (cookie == null) {
    113             throw new IllegalArgumentException("Cookie may not be null");
    114         }
    115         if (origin == null) {
    116             throw new IllegalArgumentException("Cookie origin may not be null");
    117         }
    118         String host = origin.getHost();
    119         String domain = cookie.getDomain();
    120         if (domain == null) {
    121             return false;
    122         }
    123         return host.equals(domain) || (domain.startsWith(".") && host.endsWith(domain));
    124     }
    125 
    126 }
    127