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1   /*
2    * This file is part of Waarp Project (named also Waarp or GG).
3    *
4    *  Copyright (c) 2019, Waarp SAS, and individual contributors by the @author
5    *  tags. See the COPYRIGHT.txt in the distribution for a full listing of
6    * individual contributors.
7    *
8    *  All Waarp Project is free software: you can redistribute it and/or
9    * modify it under the terms of the GNU General Public License as published by
10   * the Free Software Foundation, either version 3 of the License, or (at your
11   * option) any later version.
12   *
13   * Waarp is distributed in the hope that it will be useful, but WITHOUT ANY
14   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
15   * A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16   *
17   *  You should have received a copy of the GNU General Public License along with
18   * Waarp . If not, see <http://www.gnu.org/licenses/>.
19   */
20  package org.waarp.ftp.core.command.parameter;
21  
22  import org.waarp.common.command.ReplyCode;
23  import org.waarp.common.command.exception.Reply501Exception;
24  import org.waarp.common.command.exception.Reply504Exception;
25  import org.waarp.common.exception.InvalidArgumentException;
26  import org.waarp.ftp.core.command.AbstractCommand;
27  import org.waarp.ftp.core.command.FtpArgumentCode;
28  import org.waarp.ftp.core.command.FtpArgumentCode.TransferMode;
29  
30  /**
31   * MODE command
32   */
33  public class MODE extends AbstractCommand {
34    @Override
35    public final void exec() throws Reply501Exception, Reply504Exception {
36      // First Check if any argument
37      if (!hasArg()) {
38        // Default
39        getSession().getDataConn().setMode(FtpArgumentCode.TransferMode.STREAM);
40        getSession().setReplyCode(ReplyCode.REPLY_200_COMMAND_OKAY,
41                                  "Mode set to " +
42                                  FtpArgumentCode.TransferMode.STREAM.name());
43        return;
44      }
45      final FtpArgumentCode.TransferMode transferMode;
46      try {
47        transferMode = FtpArgumentCode.getTransferMode(getArg().charAt(0));
48      } catch (final InvalidArgumentException e) {
49        throw new Reply501Exception("Unrecognize Mode: " + getArg());
50      }
51      if (transferMode == FtpArgumentCode.TransferMode.BLOCK) {
52        getSession().getDataConn().setMode(FtpArgumentCode.TransferMode.BLOCK);
53      } else if (transferMode == FtpArgumentCode.TransferMode.STREAM) {
54        getSession().getDataConn().setMode(FtpArgumentCode.TransferMode.STREAM);
55      } else if (transferMode == TransferMode.ZLIB) {
56        getSession().getDataConn().setMode(FtpArgumentCode.TransferMode.ZLIB);
57      } else {
58        throw new Reply504Exception(
59            "Mode not implemented: " + transferMode.name());
60      }
61      getSession().setReplyCode(ReplyCode.REPLY_200_COMMAND_OKAY,
62                                "Mode set to " + transferMode.name());
63    }
64  
65  }