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1		/*
2		* Copyright 2001-2005 The Apache Software Foundation
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 examples;
17
18		import java.io.FileInputStream;
19		import java.io.FileOutputStream;
20		import java.io.IOException;
21		import java.io.InputStream;
22		import java.io.OutputStream;
23		import java.io.PrintWriter;
24		import org.apache.commons.net.ftp.FTP;
25		import org.apache.commons.net.ftp.FTPClient;
26		import org.apache.commons.net.ftp.FTPConnectionClosedException;
27		import org.apache.commons.net.ftp.FTPReply;
28
29		/***
30		* This is an example program demonstrating how to use the FTPClient class.
31		* This program connects to an FTP server and retrieves the specified
32		* file. If the -s flag is used, it stores the local file at the FTP server.
33		* Just so you can see what's happening, all reply strings are printed.
34		* If the -b flag is used, a binary transfer is assumed (default is ASCII).
35		* <p>
36		* Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file>
37		* <p>
38		***/
39	0	public final class ftp
40		{
41
42		public static final String USAGE =
43		"Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file>\n" +
44		"\nDefault behavior is to download a file and use ASCII transfer mode.\n" +
45		"\t-s store file on server (upload)\n" +
46		"\t-b use binary transfer mode\n";
47
48		public static final void main(String[] args)
49		{
50	0	int base = 0;
51	0	boolean storeFile = false, binaryTransfer = false, error = false;
52		String server, username, password, remote, local;
53		FTPClient ftp;
54
55	0	for (base = 0; base < args.length; base++)
56		{
57	0	if (args[base].startsWith("-s"))
58	0	storeFile = true;
59	0	else if (args[base].startsWith("-b"))
60	0	binaryTransfer = true;
61		else
62		break;
63		}
64
65	0	if ((args.length - base) != 5)
66		{
67	0	System.err.println(USAGE);
68	0	System.exit(1);
69		}
70
71	0	server = args[base++];
72	0	username = args[base++];
73	0	password = args[base++];
74	0	remote = args[base++];
75	0	local = args[base];
76
77	0	ftp = new FTPClient();
78	0	ftp.addProtocolCommandListener(new PrintCommandListener(
79		new PrintWriter(System.out)));
80
81		try
82		{
83		int reply;
84	0	ftp.connect(server);
85	0	System.out.println("Connected to " + server + ".");
86
87		// After connection attempt, you should check the reply code to verify
88		// success.
89	0	reply = ftp.getReplyCode();
90
91	0	if (!FTPReply.isPositiveCompletion(reply))
92		{
93	0	ftp.disconnect();
94	0	System.err.println("FTP server refused connection.");
95	0	System.exit(1);
96		}
97		}
98	0	catch (IOException e)
99		{
100	0	if (ftp.isConnected())
101		{
102		try
103		{
104	0	ftp.disconnect();
105		}
106	0	catch (IOException f)
107		{
108		// do nothing
109	0	}
110		}
111	0	System.err.println("Could not connect to server.");
112	0	e.printStackTrace();
113	0	System.exit(1);
114	0	}
115
116		__main:
117		try
118		{
119	0	if (!ftp.login(username, password))
120		{
121	0	ftp.logout();
122	0	error = true;
123		break __main;
124		}
125
126	0	System.out.println("Remote system is " + ftp.getSystemName());
127
128	0	if (binaryTransfer)
129	0	ftp.setFileType(FTP.BINARY_FILE_TYPE);
130
131		// Use passive mode as default because most of us are
132		// behind firewalls these days.
133	0	ftp.enterLocalPassiveMode();
134
135	0	if (storeFile)
136		{
137		InputStream input;
138
139	0	input = new FileInputStream(local);
140
141	0	ftp.storeFile(remote, input);
142
143	0	input.close();
144		}
145		else
146		{
147		OutputStream output;
148
149	0	output = new FileOutputStream(local);
150
151	0	ftp.retrieveFile(remote, output);
152
153	0	output.close();
154		}
155
156	0	ftp.logout();
157		}
158	0	catch (FTPConnectionClosedException e)
159		{
160	0	error = true;
161	0	System.err.println("Server closed connection.");
162	0	e.printStackTrace();
163		}
164	0	catch (IOException e)
165		{
166	0	error = true;
167	0	e.printStackTrace();
168		}
169		finally
170		{
171	0	if (ftp.isConnected())
172		{
173		try
174		{
175	0	ftp.disconnect();
176		}
177	0	catch (IOException f)
178		{
179		// do nothing
180	0	}
181		}
182		}
183
184	0	System.exit(error ? 1 : 0);
185	0	} // end main
186
187		}
188

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