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Java example source code file (BasicDomainHandler.java)

This example source code file (BasicDomainHandler.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java tags/keywords

basicdomainhandler, blank, cookie, cookieattributehandler, cookieorigin, illegalargumentexception, immutable, malformedcookieexception, missing, setcookie, string

The BasicDomainHandler.java example source code

/*
 * ====================================================================
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 */ 
package org.apache.http.impl.cookie;

import org.apache.http.annotation.Immutable;

import org.apache.http.cookie.Cookie;
import org.apache.http.cookie.CookieAttributeHandler;
import org.apache.http.cookie.CookieOrigin;
import org.apache.http.cookie.MalformedCookieException;
import org.apache.http.cookie.SetCookie;

/**
 *
 * @since 4.0
 */
@Immutable
public class BasicDomainHandler implements CookieAttributeHandler {

    public BasicDomainHandler() {
        super();
    }
    
    public void parse(final SetCookie cookie, final String value) 
            throws MalformedCookieException {
        if (cookie == null) {
            throw new IllegalArgumentException("Cookie may not be null");
        }
        if (value == null) {
            throw new MalformedCookieException("Missing value for domain attribute");
        }
        if (value.trim().length() == 0) {
            throw new MalformedCookieException("Blank value for domain attribute");
        }
        cookie.setDomain(value);
    }

    public void validate(final Cookie cookie, final CookieOrigin origin) 
            throws MalformedCookieException {
        if (cookie == null) {
            throw new IllegalArgumentException("Cookie may not be null");
        }
        if (origin == null) {
            throw new IllegalArgumentException("Cookie origin may not be null");
        }
        // Validate the cookies domain attribute.  NOTE:  Domains without 
        // any dots are allowed to support hosts on private LANs that don't 
        // have DNS names.  Since they have no dots, to domain-match the 
        // request-host and domain must be identical for the cookie to sent 
        // back to the origin-server.
        String host = origin.getHost();
        String domain = cookie.getDomain();
        if (domain == null) {
            throw new MalformedCookieException("Cookie domain may not be null");
        }
        if (host.contains(".")) {
            // Not required to have at least two dots.  RFC 2965.
            // A Set-Cookie2 with Domain=ajax.com will be accepted.

            // domain must match host
            if (!host.endsWith(domain)) {
                if (domain.startsWith(".")) {
                    domain = domain.substring(1, domain.length());
                }
                if (!host.equals(domain)) { 
                    throw new MalformedCookieException(
                        "Illegal domain attribute \"" + domain 
                        + "\". Domain of origin: \"" + host + "\"");
                }
            }
        } else {
            if (!host.equals(domain)) {
                throw new MalformedCookieException(
                    "Illegal domain attribute \"" + domain 
                    + "\". Domain of origin: \"" + host + "\"");
            }
        }
    }
    
    public boolean match(final Cookie cookie, final CookieOrigin origin) {
        if (cookie == null) {
            throw new IllegalArgumentException("Cookie may not be null");
        }
        if (origin == null) {
            throw new IllegalArgumentException("Cookie origin may not be null");
        }
        String host = origin.getHost();
        String domain = cookie.getDomain();
        if (domain == null) {
            return false;
        }
        if (host.equals(domain)) {
            return true;
        }
        if (!domain.startsWith(".")) {
            domain = '.' + domain;
        }
        return host.endsWith(domain) || host.equals(domain.substring(1));
    }
    
}

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