home | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Java example source code file (RFC2617Scheme.java)

This example source code file (RFC2617Scheme.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

authentication, authschemebase, chararraybuffer, hashmap, headerelement, headervalueparser, illegalargumentexception, malformedchallengeexception, map, override, parameter, parsercursor, rfc2617scheme, string, util

The RFC2617Scheme.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.auth;

import java.util.HashMap;
import java.util.Locale;
import java.util.Map;

import org.apache.http.annotation.NotThreadSafe;

import org.apache.http.HeaderElement;
import org.apache.http.auth.MalformedChallengeException;
import org.apache.http.message.BasicHeaderValueParser;
import org.apache.http.message.HeaderValueParser;
import org.apache.http.message.ParserCursor;
import org.apache.http.util.CharArrayBuffer;

/**
 * Abstract authentication scheme class that lays foundation for all
 * RFC 2617 compliant authentication schemes and provides capabilities common 
 * to all authentication schemes defined in RFC 2617.
 *
 * @since 4.0
 */
@NotThreadSafe // AuthSchemeBase, params
public abstract class RFC2617Scheme extends AuthSchemeBase {

    /**
     * Authentication parameter map.
     */
    private Map<String, String> params;

    /**
     * Default constructor for RFC2617 compliant authentication schemes.
     */
    public RFC2617Scheme() {
        super();
    }

    @Override
    protected void parseChallenge(
            final CharArrayBuffer buffer, int pos, int len) throws MalformedChallengeException {
        HeaderValueParser parser = BasicHeaderValueParser.DEFAULT;
        ParserCursor cursor = new ParserCursor(pos, buffer.length()); 
        HeaderElement[] elements = parser.parseElements(buffer, cursor);
        if (elements.length == 0) {
            throw new MalformedChallengeException("Authentication challenge is empty");
        }
        
        this.params = new HashMap<String, String>(elements.length);
        for (HeaderElement element : elements) {
            this.params.put(element.getName(), element.getValue());
        }
    }

    /**
     * Returns authentication parameters map. Keys in the map are lower-cased.
     * 
     * @return the map of authentication parameters
     */
    protected Map<String, String> getParameters() {
        if (this.params == null) {
            this.params = new HashMap<String, String>();
        }
        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(final String name) {
        if (name == null) {
            throw new IllegalArgumentException("Parameter name may not be null"); 
        }
        if (this.params == null) {
            return null;
        }
        return this.params.get(name.toLowerCase(Locale.ENGLISH));
    }

    /**
     * Returns authentication realm. The realm may not be null.
     * 
     * @return the authentication realm
     */
    public String getRealm() {
        return getParameter("realm");
    }

}

Other Java examples (source code examples)

Here is a short list of links related to this Java RFC2617Scheme.java source code file:



my book on functional programming

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.