Move SLC Support

[gpl/argeo-slc.git] / org.argeo.slc.support / src / org / argeo / slc / jsch / ScpFrom.java

diff --git a/org.argeo.slc.support/src/org/argeo/slc/jsch/ScpFrom.java b/org.argeo.slc.support/src/org/argeo/slc/jsch/ScpFrom.java
new file mode 100644 (file)
index 0000000..3f83778
--- /dev/null
+++ b/org.argeo.slc.support/src/org/argeo/slc/jsch/ScpFrom.java
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed 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.argeo.slc.jsch;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+import org.apache.commons.io.IOUtils;
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.argeo.slc.SlcException;
+import org.springframework.core.io.Resource;
+
+import com.jcraft.jsch.Channel;
+import com.jcraft.jsch.ChannelExec;
+import com.jcraft.jsch.Session;
+
+public class ScpFrom extends AbstractJschTask {
+       private final static Log log = LogFactory.getLog(ScpFrom.class);
+
+       private Resource localResource;
+       private String remotePath;
+       private Boolean mkdir = false;
+
+       public void run(Session session) {
+               if (localResource != null) {
+                       File lFile;
+                       try {
+                               lFile = localResource.getFile();
+                       } catch (IOException e) {
+                               throw new SlcException("Cannot interpret resource "
+                                               + localResource + " as file.", e);
+                       }
+                       downloadFile(session, lFile, remotePath);
+               }
+       }
+
+       protected void downloadFile(Session session, File localFile,
+                       String remoteFile) {
+               OutputStream out = null;
+               OutputStream channelOut;
+               InputStream channelIn;
+               try {
+                       // exec 'scp -f rfile' remotely
+                       String command = "scp -f " + remoteFile;
+                       Channel channel = session.openChannel("exec");
+                       ((ChannelExec) channel).setCommand(command);
+
+                       // get I/O streams for remote scp
+                       channelOut = channel.getOutputStream();
+                       channelIn = channel.getInputStream();
+
+                       channel.connect();
+
+                       byte[] buf = new byte[1024];
+
+                       // send '\0'
+                       buf[0] = 0;
+                       channelOut.write(buf, 0, 1);
+                       channelOut.flush();
+
+                       while (true) {
+                               int c = checkAck(channelIn);
+                               if (c != 'C') {
+                                       break;
+                               }
+
+                               // read '0644 '
+                               channelIn.read(buf, 0, 5);
+
+                               long filesize = 0L;
+                               while (true) {
+                                       if (channelIn.read(buf, 0, 1) < 0) {
+                                               // error
+                                               break;
+                                       }
+                                       if (buf[0] == ' ')
+                                               break;
+                                       filesize = filesize * 10L + (long) (buf[0] - '0');
+                               }
+
+                               String remoteFileName = null;
+                               for (int i = 0;; i++) {
+                                       channelIn.read(buf, i, 1);
+                                       if (buf[i] == (byte) 0x0a) {
+                                               remoteFileName = new String(buf, 0, i);
+                                               break;
+                                       }
+                               }
+
+                               // System.out.println("filesize="+filesize+", file="+file);
+
+                               // send '\0'
+                               buf[0] = 0;
+                               channelOut.write(buf, 0, 1);
+                               channelOut.flush();
+
+                               // Create a s adirectory if it doesn't exists
+                               if (!localFile.exists() && mkdir)
+                                       localFile.mkdirs();
+
+                               // read a content of lfile
+                               String localPath = localFile.isDirectory() ? localFile
+                                               .getPath()
+                                               + File.separator + remoteFileName : localFile.getPath();
+
+                               out = new FileOutputStream(localPath);
+                               int foo;
+                               while (true) {
+                                       if (buf.length < filesize)
+                                               foo = buf.length;
+                                       else
+                                               foo = (int) filesize;
+                                       foo = channelIn.read(buf, 0, foo);
+                                       if (foo < 0) {
+                                               // error
+                                               break;
+                                       }
+                                       out.write(buf, 0, foo);
+                                       filesize -= foo;
+                                       if (filesize == 0L)
+                                               break;
+                               }
+
+                               checkAck(channelIn);
+
+                               // send '\0'
+                               buf[0] = 0;
+                               channelOut.write(buf, 0, 1);
+                               channelOut.flush();
+
+                               if (log.isDebugEnabled())
+                                       log.debug("Finished downloading " + remoteFile + " on "
+                                                       + getSshTarget() + " to " + localPath);
+                       }
+
+                       channel.disconnect();
+                       // session.disconnect();
+               } catch (Exception e) {
+                       throw new SlcException("Cannot download " + remoteFile + " to "
+                                       + localFile, e);
+               } finally {
+                       IOUtils.closeQuietly(out);
+               }
+       }
+
+       public void setLocalResource(Resource localFile) {
+               this.localResource = localFile;
+       }
+
+       public void setRemotePath(String remoteFile) {
+               this.remotePath = remoteFile;
+       }
+
+       public void setMkdir(Boolean mkdir) {
+               this.mkdir = mkdir;
+       }
+}