org.argeo.slc.support/src/org/argeo/slc/jsch/SshShell.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.slc.jsch;
  17
  18 import java.io.BufferedReader;
  19 import java.io.BufferedWriter;
  20 import java.io.IOException;
  21 import java.io.InputStreamReader;
  22 import java.io.OutputStreamWriter;
  23
  24 import org.apache.commons.io.IOUtils;
  25 import org.apache.commons.logging.Log;
  26 import org.apache.commons.logging.LogFactory;
  27 import org.argeo.slc.SlcException;
  28 import org.springframework.core.io.Resource;
  29 import org.springframework.util.StringUtils;
  30
  31 import com.jcraft.jsch.Channel;
  32 import com.jcraft.jsch.Session;
  33
  34 public class SshShell extends AbstractJschTask {
  35         private final static Log log = LogFactory.getLog(SshShell.class);
  36         private Resource input;
  37
  38         @Override
  39         void run(Session session) {
  40                 try {
  41                         final Channel channel = session.openChannel("shell");
  42
  43                         // Enable agent-forwarding.
  44                         // ((ChannelShell)channel).setAgentForwarding(true);
  45
  46                         // channel.setInputStream(System.in);
  47                         // channel.setInputStream(input.getInputStream());
  48                         /*
  49                          * // a hack for MS-DOS prompt on Windows.
  50                          * channel.setInputStream(new FilterInputStream(System.in){ public
  51                          * int read(byte[] b, int off, int len)throws IOException{ return
  52                          * in.read(b, off, (len>1024?1024:len)); } });
  53                          */
  54
  55                         // channel.setOutputStream(System.out);
  56
  57                         /*
  58                          * // Choose the pty-type "vt102".
  59                          * ((ChannelShell)channel).setPtyType("vt102");
  60                          */
  61
  62                         /*
  63                          * // Set environment variable "LANG" as "ja_JP.eucJP".
  64                          * ((ChannelShell)channel).setEnv("LANG", "ja_JP.eucJP");
  65                          */
  66
  67                         // Writer thread
  68                         final BufferedWriter writer = new BufferedWriter(
  69                                         new OutputStreamWriter(channel.getOutputStream()));
  70
  71                         // channel.connect();
  72                         channel.connect(3 * 1000);
  73
  74                         // while (!channel.isConnected())
  75                         // try {
  76                         // Thread.sleep(500);
  77                         // } catch (InterruptedException e1) {
  78                         // // silent
  79                         // }
  80
  81                         Thread writerThread = new Thread("Shell writer " + getSshTarget()) {
  82
  83                                 @Override
  84                                 public void run() {
  85
  86                                         if (log.isDebugEnabled())
  87                                                 log.debug("Start writing to shell");
  88
  89                                         BufferedReader reader = null;
  90                                         try {
  91                                                 reader = new BufferedReader(new InputStreamReader(input
  92                                                                 .getInputStream()));
  93                                                 String line = null;
  94                                                 while ((line = reader.readLine()) != null) {
  95                                                         if (!StringUtils.hasText(line))
  96                                                                 continue;
  97                                                         writer.write(line);
  98                                                         writer.newLine();
  99                                                 }
 100                                                 writer.append("exit");
 101                                                 writer.newLine();
 102                                                 writer.flush();
 103                                                 // channel.disconnect();
 104                                         } catch (IOException e) {
 105                                                 throw new SlcException("Cannot write to shell on "
 106                                                                 + getSshTarget(), e);
 107                                         } finally {
 108                                                 IOUtils.closeQuietly(reader);
 109                                         }
 110                                 }
 111                         };
 112                         writerThread.start();
 113
 114                         BufferedReader execIn = null;
 115                         try {
 116                                 execIn = new BufferedReader(new InputStreamReader(channel
 117                                                 .getInputStream()));
 118                                 String line = null;
 119                                 while ((line = execIn.readLine()) != null) {
 120                                         if (!line.trim().equals(""))
 121                                                 log.info(line);
 122                                 }
 123                         } catch (Exception e) {
 124                                 throw new SlcException("Cannot read from shell on "
 125                                                 + getSshTarget(), e);
 126                         } finally {
 127                                 IOUtils.closeQuietly(execIn);
 128                         }
 129
 130                 } catch (Exception e) {
 131                         throw new SlcException("Cannot use SSH shell on " + getSshTarget(),
 132                                         e);
 133                 }
 134         }
 135
 136         public void setInput(Resource input) {
 137                 this.input = input;
 138         }
 139
 140 }