| /* |
| * 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. |
| */ |
| |
| package org.apache.ftpserver.command.impl; |
| |
| import java.io.IOException; |
| |
| import org.apache.ftpserver.command.AbstractCommand; |
| import org.apache.ftpserver.ftplet.FtpReply; |
| import org.apache.ftpserver.ftplet.FtpRequest; |
| import org.apache.ftpserver.impl.FtpIoSession; |
| import org.apache.ftpserver.impl.FtpServerContext; |
| import org.apache.ftpserver.impl.LocalizedFtpReply; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * <strong>Internal class, do not use directly.</strong> |
| * |
| * <code>REST <SP> <marker> <CRLF></code><br> |
| * |
| * The argument field represents the server marker at which file transfer is to |
| * be restarted. This command does not cause file transfer but skips over the |
| * file to the specified data checkpoint. This command shall be immediately |
| * followed by the appropriate FTP service command which shall cause file |
| * transfer to resume. |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class REST extends AbstractCommand { |
| |
| private final Logger LOG = LoggerFactory.getLogger(REST.class); |
| |
| /** |
| * Execute command |
| */ |
| public void execute(final FtpIoSession session, |
| final FtpServerContext context, final FtpRequest request) |
| throws IOException { |
| |
| // argument check |
| String argument = request.getArgument(); |
| if (argument == null) { |
| session.write(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, |
| "REST", null)); |
| return; |
| } |
| |
| // get offset number |
| session.resetState(); |
| long skipLen = 0L; |
| try { |
| skipLen = Long.parseLong(argument); |
| |
| // check offset number |
| if (skipLen < 0L) { |
| skipLen = 0L; |
| session |
| .write(LocalizedFtpReply |
| .translate( |
| session, |
| request, |
| context, |
| FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, |
| "REST.negetive", null)); |
| } else { |
| session |
| .write(LocalizedFtpReply |
| .translate( |
| session, |
| request, |
| context, |
| FtpReply.REPLY_350_REQUESTED_FILE_ACTION_PENDING_FURTHER_INFORMATION, |
| "REST", null)); |
| } |
| } catch (NumberFormatException ex) { |
| LOG.debug("Invalid restart position: " + argument, ex); |
| session.write(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, |
| "REST.invalid", null)); |
| } |
| |
| session.setFileOffset(skipLen); |
| } |
| |
| } |