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1   /*
2    * Copyright 2007-2008 the original author or authors. Licensed under the Apache License, Version 2.0 (the
3    * "License"); you may not use this file except in compliance with the License. You may obtain a copy of the
4    * License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in
5    * writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
6    * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing
7    * permissions and limitations under the License.
8    */
9   
10  package org.gwe.drivers.fileSystems.handles;
11  
12  import java.io.InputStream;
13  import java.io.OutputStream;
14  import java.io.PrintStream;
15  
16  import org.apache.commons.logging.Log;
17  import org.apache.commons.logging.LogFactory;
18  import org.gwe.drivers.HandleCreationException;
19  import org.gwe.drivers.HandleOperationException;
20  import org.gwe.drivers.fileSystems.FileHandle;
21  import org.gwe.drivers.netAccess.handles.JSchConnection;
22  import org.gwe.utils.security.ProtocolScheme;
23  import org.gwe.utils.security.ResourceLink;
24  
25  import com.jcraft.jsch.Channel;
26  import com.jcraft.jsch.ChannelSftp;
27  import com.jcraft.jsch.JSchException;
28  import com.jcraft.jsch.SftpException;
29  
30  /**
31   * @author Marco Ruiz
32   * @since Aug 23, 2007
33   */
34  public class JSchHandle extends FileHandle {
35  	
36  	private static Log log = LogFactory.getLog(JSchHandle.class);
37  	
38  	private JSchConnection conn;
39  	private ChannelSftp sftpChannel;
40  	private String fileName;
41  	
42  	public JSchHandle(ResourceLink<FileHandle> link) throws HandleCreationException {
43  		super(link);
44  		try {
45  			conn = new JSchConnection(link.cloneToHostLink(ProtocolScheme.SSH));
46  	        sftpChannel = createChannel();
47  		} catch (Exception ex) {
48  			log.info("Connection failed: aborting", ex);
49  			throw new HandleCreationException("Jsch unable to establish a connection.", ex);
50  		}
51  	}
52  	
53  	private ChannelSftp createChannel() throws HandleOperationException {
54  	    try {
55      		Channel channel = conn.getSessionObj().openChannel("sftp");
56  			channel.connect();
57  			return (ChannelSftp)channel;
58          } catch (JSchException e1) {
59          	throw new HandleOperationException("");
60          }
61      }
62  
63  	@Override
64      public void createFolder() throws HandleOperationException {
65      }
66  	
67  	@Override
68  	public boolean exists() throws HandleOperationException {
69  		InputStream in = System.in;
70  		PrintStream out = System.out;
71  				
72  		byte[] buf = new byte[1024];
73  		int i;
74  		String str;
75  		int level=0;
76  
77  		try {
78  			sftpChannel.cd("");
79  			sftpChannel.lcd("");
80  		} catch(SftpException e){
81  			System.out.println(e.toString());
82  		}
83  		return true;
84  	}
85  	
86  	@Override
87  	public FileHandle[] getChildren() throws HandleOperationException {
88  		// TODO Auto-generated method stub
89  		return null;
90  	}
91  	
92  	@Override
93  	public InputStream getInputStream() throws HandleOperationException {
94  		// TODO Auto-generated method stub
95  		return null;
96  	}
97  	
98  	@Override
99  	public OutputStream getOutputStream() throws HandleOperationException {
100 		// TODO Auto-generated method stub
101 		return null;
102 	}
103 	
104 	@Override
105 	public long getSize() throws HandleOperationException {
106 		// TODO Auto-generated method stub
107 		return 0;
108 	}
109 	
110 	@Override
111 	public boolean isDirectory() throws HandleOperationException {
112 		// TODO Auto-generated method stub
113 		return false;
114 	}
115 }
116