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/*
 * Copyright 2001-2004 The Apache Software Foundation.
 * 
 * Licensed 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.
 */

package org.apache.axis.handlers.http;

import org.apache.axis.AxisFault;
import org.apache.axis.MessageContext;
import org.apache.axis.components.logger.LogFactory;
import org.apache.axis.encoding.Base64;
import org.apache.axis.handlers.BasicHandler;
import org.apache.axis.transport.http.HTTPConstants;
import org.apache.axis.utils.Messages;
import org.apache.commons.logging.Log;


/** An HTTPAuthHandler simply sets the context's username
 * and password properties from the HTTP auth headers.
 * 
 * @author Glen Daniels ([email protected])
 * @author Doug Davis ([email protected])
 */
public class HTTPAuthHandler extends BasicHandler
{
    protected static Log log =
        LogFactory.getLog(HTTPAuthHandler.class.getName());

    public void invoke(MessageContext msgContext) throws AxisFault
    {
        log.debug("Enter: HTTPAuthHandler::invoke");
        
        /* Process the Basic Auth stuff in the headers */
        /***********************************************/
        String tmp = (String)msgContext.getProperty(HTTPConstants.HEADER_AUTHORIZATION);
        if ( tmp != null ) tmp = tmp.trim();
        if ( tmp != null && tmp.startsWith("Basic ") ) {
            String user=null ;
            int  i ;

            tmp = new String( Base64.decode( tmp.substring(6) ) );
            i = tmp.indexOf( ':' );
            if ( i == -1 ) user = tmp ;
            else           user = tmp.substring( 0, i);
            msgContext.setUsername( user );
            log.debug( Messages.getMessage("httpUser00", user) );
            if ( i != -1 )  {
                String pwd = tmp.substring(i+1);
                if ( pwd != null && pwd.equals("") ) pwd = null ;
                if ( pwd != null ) {
                    msgContext.setPassword( pwd );
                    log.debug( Messages.getMessage("httpPassword00", pwd) );
                }
            }
        }

        log.debug("Exit: HTTPAuthHandler::invoke");
    }
}