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1   /*****************************************************************
2    * Licensed to the Apache Software Foundation (ASF) under one   *
3    * or more contributor license agreements.  See the NOTICE file *
4    * distributed with this work for additional information        *
5    * regarding copyright ownership.  The ASF licenses this file   *
6    * to you under the Apache License, Version 2.0 (the            *
7    * "License"); you may not use this file except in compliance   *
8    * with the License.  You may obtain a copy of the License at   *
9    *                                                              *
10   *   http://www.apache.org/licenses/LICENSE-2.0                 *
11   *                                                              *
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14   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY       *
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16   * specific language governing permissions and limitations      *
17   * under the License.                                           *
18   ****************************************************************/
19  
20  package org.apache.james.smtpserver;
21  
22  import org.apache.james.util.mail.dsn.DSNStatus;
23  
24  /***
25    * Handles RSET command
26    */
27  public class RsetCmdHandler implements CommandHandler {
28      /***
29       * The name of the command handled by the command handler
30       */
31      private final static String COMMAND_NAME = "RSET";
32  
33      /*
34       * handles RSET command
35       *
36       * @see org.apache.james.smtpserver.CommandHandler#onCommand(SMTPSession)
37      **/
38      public void onCommand(SMTPSession session) {
39          doRSET(session, session.getCommandArgument());
40      }
41  
42  
43      /***
44       * Handler method called upon receipt of a RSET command.
45       * Resets message-specific, but not authenticated user, state.
46       *
47       * @param session SMTP session object
48       * @param argument the argument passed in with the command by the SMTP client
49       */
50      private void doRSET(SMTPSession session, String argument) {
51          String responseString = "";
52          if ((argument == null) || (argument.length() == 0)) {
53              // remember the ehlo mode
54              Object currentHeloMode = session.getState().get(SMTPSession.CURRENT_HELO_MODE);
55              session.resetState();
56              // start again with the old helo mode
57              if (currentHeloMode != null) {
58                  session.getState().put(SMTPSession.CURRENT_HELO_MODE,currentHeloMode);
59              }
60              responseString = "250 "+DSNStatus.getStatus(DSNStatus.SUCCESS,DSNStatus.UNDEFINED_STATUS)+" OK";
61          } else {
62              responseString = "500 "+DSNStatus.getStatus(DSNStatus.PERMANENT,DSNStatus.DELIVERY_INVALID_ARG)+" Unexpected argument provided with RSET command";
63          }
64          session.writeResponse(responseString);
65      }
66  
67  
68  
69  }