legacy/org.argeo.slc.support/src/org/argeo/slc/jsch/ScpFrom.java

   1 package org.argeo.slc.jsch;
   2
   3 import java.io.File;
   4 import java.io.FileOutputStream;
   5 import java.io.IOException;
   6 import java.io.InputStream;
   7 import java.io.OutputStream;
   8
   9 import org.apache.commons.io.IOUtils;
  10 import org.argeo.api.cms.CmsLog;
  11 import org.argeo.slc.SlcException;
  12 import org.springframework.core.io.Resource;
  13
  14 import com.jcraft.jsch.Channel;
  15 import com.jcraft.jsch.ChannelExec;
  16 import com.jcraft.jsch.Session;
  17
  18 public class ScpFrom extends AbstractJschTask {
  19         private final static CmsLog log = CmsLog.getLog(ScpFrom.class);
  20
  21         private Resource localResource;
  22         private String remotePath;
  23         private Boolean mkdir = false;
  24
  25         public void run(Session session) {
  26                 if (localResource != null) {
  27                         File lFile;
  28                         try {
  29                                 lFile = localResource.getFile();
  30                         } catch (IOException e) {
  31                                 throw new SlcException("Cannot interpret resource "
  32                                                 + localResource + " as file.", e);
  33                         }
  34                         downloadFile(session, lFile, remotePath);
  35                 }
  36         }
  37
  38         protected void downloadFile(Session session, File localFile,
  39                         String remoteFile) {
  40                 OutputStream out = null;
  41                 OutputStream channelOut;
  42                 InputStream channelIn;
  43                 try {
  44                         // exec 'scp -f rfile' remotely
  45                         String command = "scp -f " + remoteFile;
  46                         Channel channel = session.openChannel("exec");
  47                         ((ChannelExec) channel).setCommand(command);
  48
  49                         // get I/O streams for remote scp
  50                         channelOut = channel.getOutputStream();
  51                         channelIn = channel.getInputStream();
  52
  53                         channel.connect();
  54
  55                         byte[] buf = new byte[1024];
  56
  57                         // send '\0'
  58                         buf[0] = 0;
  59                         channelOut.write(buf, 0, 1);
  60                         channelOut.flush();
  61
  62                         while (true) {
  63                                 int c = checkAck(channelIn);
  64                                 if (c != 'C') {
  65                                         break;
  66                                 }
  67
  68                                 // read '0644 '
  69                                 channelIn.read(buf, 0, 5);
  70
  71                                 long filesize = 0L;
  72                                 while (true) {
  73                                         if (channelIn.read(buf, 0, 1) < 0) {
  74                                                 // error
  75                                                 break;
  76                                         }
  77                                         if (buf[0] == ' ')
  78                                                 break;
  79                                         filesize = filesize * 10L + (long) (buf[0] - '0');
  80                                 }
  81
  82                                 String remoteFileName = null;
  83                                 for (int i = 0;; i++) {
  84                                         channelIn.read(buf, i, 1);
  85                                         if (buf[i] == (byte) 0x0a) {
  86                                                 remoteFileName = new String(buf, 0, i);
  87                                                 break;
  88                                         }
  89                                 }
  90
  91                                 // System.out.println("filesize="+filesize+", file="+file);
  92
  93                                 // send '\0'
  94                                 buf[0] = 0;
  95                                 channelOut.write(buf, 0, 1);
  96                                 channelOut.flush();
  97
  98                                 // Create a s adirectory if it doesn't exists
  99                                 if (!localFile.exists() && mkdir)
 100                                         localFile.mkdirs();
 101
 102                                 // read a content of lfile
 103                                 String localPath = localFile.isDirectory() ? localFile
 104                                                 .getPath()
 105                                                 + File.separator + remoteFileName : localFile.getPath();
 106
 107                                 out = new FileOutputStream(localPath);
 108                                 int foo;
 109                                 while (true) {
 110                                         if (buf.length < filesize)
 111                                                 foo = buf.length;
 112                                         else
 113                                                 foo = (int) filesize;
 114                                         foo = channelIn.read(buf, 0, foo);
 115                                         if (foo < 0) {
 116                                                 // error
 117                                                 break;
 118                                         }
 119                                         out.write(buf, 0, foo);
 120                                         filesize -= foo;
 121                                         if (filesize == 0L)
 122                                                 break;
 123                                 }
 124
 125                                 checkAck(channelIn);
 126
 127                                 // send '\0'
 128                                 buf[0] = 0;
 129                                 channelOut.write(buf, 0, 1);
 130                                 channelOut.flush();
 131
 132                                 if (log.isDebugEnabled())
 133                                         log.debug("Finished downloading " + remoteFile + " on "
 134                                                         + getSshTarget() + " to " + localPath);
 135                         }
 136
 137                         channel.disconnect();
 138                         // session.disconnect();
 139                 } catch (Exception e) {
 140                         throw new SlcException("Cannot download " + remoteFile + " to "
 141                                         + localFile, e);
 142                 } finally {
 143                         IOUtils.closeQuietly(out);
 144                 }
 145         }
 146
 147         public void setLocalResource(Resource localFile) {
 148                 this.localResource = localFile;
 149         }
 150
 151         public void setRemotePath(String remoteFile) {
 152                 this.remotePath = remoteFile;
 153         }
 154
 155         public void setMkdir(Boolean mkdir) {
 156                 this.mkdir = mkdir;
 157         }
 158 }