logincommand.java

java 开发的邮件服务器平台。支持以下协议。 协议可以修改为自己的专门标识

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 * Copyright (c) 2000-2004 The Apache Software Foundation.             *
 * All rights reserved.                                                *
 * ------------------------------------------------------------------- *
 * 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.                      *
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package org.apache.james.imapserver.commands;

import org.apache.james.imapserver.ImapRequestLineReader;
import org.apache.james.imapserver.ImapResponse;
import org.apache.james.imapserver.ImapSession;
import org.apache.james.imapserver.ProtocolException;
import org.apache.james.services.User;

/**
 * Handles processeing for the LOGIN imap command.
 *
 *
 * @version $Revision: 1.3.2.3 $
 */
class LoginCommand extends NonAuthenticatedStateCommand
{
    public static final String NAME = "LOGIN";
    public static final String ARGS = "<userid> <password>";

    /** @see CommandTemplate#doProcess */
    protected void doProcess( ImapRequestLineReader request,
                              ImapResponse response,
                              ImapSession session )
            throws ProtocolException
    {
        String userid = parser.astring( request );
        String password = parser.astring( request );
        parser.endLine( request );

        if ( session.getUsers().test( userid, password ) ) {
            User user = session.getUsers().getUserByName( userid );
            session.setAuthenticated( user );
            response.commandComplete( this );

        }
        else {
            response.commandFailed( this, "Invalid login/password" );
        }
    }

    /** @see ImapCommand#getName */
    public String getName()
    {
        return NAME;
    }

    /** @see CommandTemplate#getArgSyntax */
    public String getArgSyntax()
    {
        return ARGS;
    }
}

/*
6.2.2.  LOGIN Command

   Arguments:  user name
               password

   Responses:  no specific responses for this command

   Result:     OK - login completed, now in authenticated state
               NO - login failure: user name or password rejected
               BAD - command unknown or arguments invalid

      The LOGIN command identifies the client to the server and carries
      the plaintext password authenticating this user.

   Example:    C: a001 LOGIN SMITH SESAME
               S: a001 OK LOGIN completed
*/