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/*
 * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/auth/RFC2617Scheme.java,v 1.4 2003/04/22 17:00:25 olegk Exp $
 * $Revision: 1.4 $
 * $Date: 2003/04/22 17:00:25 $
 *
 * ====================================================================
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 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002-2003 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    distribution.
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 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Commons", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
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 *    permission, please contact apache@apache.org.
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 * 5. Products derived from this software may not be called "Apache"
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * ====================================================================
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 * This software consists of voluntary contributions made by many
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 * information on the Apache Software Foundation, please see
 * .
 *
 * [Additional notices, if required by prior licensing conditions]
 *
 */

package org.apache.commons.httpclient.auth;

import java.util.Map;

/**
 * 

* Abstract authentication scheme class that lays foundation for all * RFC 2617 compliant authetication schemes and provides capabilities common * to all authentication schemes defined in RFC 2617. *

* * @author Oleg Kalnichevski */ public abstract class RFC2617Scheme extends AuthSchemeBase { /** * Authentication parameter map. */ private Map params = null; /** * Default constructor for RFC2617 compliant authetication schemes. * * @param challenge authentication challenge * * @throws MalformedChallengeException is thrown if the authentication challenge * is malformed */ public RFC2617Scheme(final String challenge) throws MalformedChallengeException { super(challenge); String s = AuthChallengeParser.extractScheme(challenge); if (!s.equalsIgnoreCase(getSchemeName())) { throw new MalformedChallengeException( "Invalid " + getSchemeName() + " challenge: " + challenge); } this.params = AuthChallengeParser.extractParams(challenge); } /** * Returns authentication parameters map. Keys in the map are lower-cased. * * @return the map of authentication parameters */ protected Map getParameters() { return this.params; } /** * Returns authentication parameter with the given name, if available. * * @param name The name of the parameter to be returned * * @return the parameter with the given name */ public String getParameter(String name) { if (name == null) { throw new IllegalArgumentException("Parameter name may not be null"); } return (String) this.params.get(name.toLowerCase()); } /** * Returns authentication realm. The realm may not be null. * * @return the authentication realm */ public String getRealm() { return getParameter("realm"); } /** * Returns a String identifying the authentication challenge. This is * used, in combination with the host and port to determine if * authorization has already been attempted or not. Schemes which * require multiple requests to complete the authentication should * return a different value for each stage in the request. * *

Additionally, the ID should take into account any changes to the * authentication challenge and return a different value when appropriate. * For example when the realm changes in basic authentication it should be * considered a different authentication attempt and a different value should * be returned.

* *

This method simply returns the realm for the challenge.

* * @return String a String identifying the authentication challenge. The * returned value may be null. */ public String getID() { return getRealm(); } }
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