/*
 * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

package sun.net.www.protocol.http;

import java.io.IOException;
import java.net.URL;
import java.util.Hashtable;
import java.util.LinkedList;
import java.util.ListIterator;
import java.util.Enumeration;
import java.util.HashMap;

/**
 * @author Michael McMahon
 *
 * Interface provided by internal http authentication cache.
 * NB. This API will be replaced in a future release, and should
 * not be made public.
 */

public interface AuthCache {

    /**
     * Put an entry in the cache. pkey is a string specified as follows:
     *
     * A:[B:]C:D:E[:F]   Between 4 and 6 fields separated by ":"
     *          where the fields have the following meaning:
     * A is "s" or "p" for server or proxy authentication respectively
     * B is optional and is "D", "B", or "N" for digest, basic or ntlm auth.
     * C is either "http" or "https"
     * D is the hostname
     * E is the port number
     * F is optional and if present is the realm
     *
     * Generally, two entries are created for each AuthCacheValue,
     * one including the realm and one without the realm.
     * Also, for some schemes (digest) multiple entries may be created
     * with the same pkey, but with a different path value in
     * the AuthCacheValue.
     */
    public void put (String pkey, AuthCacheValue value);

    /**
     * Get an entry from the cache based on pkey as described above, but also
     * using a pathname (skey) and the cache must return an entry
     * if skey is a sub-path of the AuthCacheValue.path field.
     */
    public AuthCacheValue get (String pkey, String skey);

    /**
     * remove the entry from the cache whose pkey is specified and
     * whose path is equal to entry.path. If entry is null then
     * all entries with the same pkey should be removed.
     */
    public void remove (String pkey, AuthCacheValue entry);
}