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16 package examples;
17
18 import java.io.File  ;
19 import java.io.FileInputStream ;
20 import java.io.FileOutputStream ;
21 import java.io.IOException ;
22 import java.net.SocketException ;
23 import java.net.UnknownHostException ;
24 import org.apache.commons.net.tftp.TFTP;
25 import org.apache.commons.net.tftp.TFTPClient;
26
27
45 public final class tftp
46 {
47 static final String USAGE =
48 "Usage: tftp [options] hostname localfile remotefile\n\n" +
49 "hostname - The name of the remote host\n" +
50 "localfile - The name of the local file to send or the name to use for\n" +
51 "\tthe received file\n" +
52 "remotefile - The name of the remote file to receive or the name for\n" +
53 "\tthe remote server to use to name the local file being sent.\n\n" +
54 "options: (The default is to assume -r -b)\n" +
55 "\t-s Send a local file\n" +
56 "\t-r Receive a remote file\n" +
57 "\t-a Use ASCII transfer mode\n" +
58 "\t-b Use binary transfer mode\n";
59
60 public final static void main(String [] args)
61 {
62 boolean receiveFile = true, closed;
63 int transferMode = TFTP.BINARY_MODE, argc;
64 String arg, hostname, localFilename, remoteFilename;
65 TFTPClient tftp;
66
67 for (argc = 0; argc < args.length; argc++)
69 {
70 arg = args[argc];
71 if (arg.startsWith("-"))
72 {
73 if (arg.equals("-r"))
74 receiveFile = true;
75 else if (arg.equals("-s"))
76 receiveFile = false;
77 else if (arg.equals("-a"))
78 transferMode = TFTP.ASCII_MODE;
79 else if (arg.equals("-b"))
80 transferMode = TFTP.BINARY_MODE;
81 else
82 {
83 System.err.println("Error: unrecognized option.");
84 System.err.print(USAGE);
85 System.exit(1);
86 }
87 }
88 else
89 break;
90 }
91
92 if (args.length - argc != 3)
94 {
95 System.err.println("Error: invalid number of arguments.");
96 System.err.print(USAGE);
97 System.exit(1);
98 }
99
100 hostname = args[argc];
102 localFilename = args[argc + 1];
103 remoteFilename = args[argc + 2];
104
105 tftp = new TFTPClient();
107
108 tftp.setDefaultTimeout(60000);
110
111 try
113 {
114 tftp.open();
115 }
116 catch (SocketException e)
117 {
118 System.err.println("Error: could not open local UDP socket.");
119 System.err.println(e.getMessage());
120 System.exit(1);
121 }
122
123 closed = false;
125
126 if (receiveFile)
128 {
129 FileOutputStream output = null;
130 File file;
131
132 file = new File (localFilename);
133
134 if (file.exists())
136 {
137 System.err.println("Error: " + localFilename + " already exists.");
138 System.exit(1);
139 }
140
141 try
143 {
144 output = new FileOutputStream (file);
145 }
146 catch (IOException e)
147 {
148 tftp.close();
149 System.err.println("Error: could not open local file for writing.");
150 System.err.println(e.getMessage());
151 System.exit(1);
152 }
153
154 try
156 {
157 tftp.receiveFile(remoteFilename, transferMode, output, hostname);
158 }
159 catch (UnknownHostException e)
160 {
161 System.err.println("Error: could not resolve hostname.");
162 System.err.println(e.getMessage());
163 System.exit(1);
164 }
165 catch (IOException e)
166 {
167 System.err.println(
168 "Error: I/O exception occurred while receiving file.");
169 System.err.println(e.getMessage());
170 System.exit(1);
171 }
172 finally
173 {
174 tftp.close();
176 try
177 {
178 output.close();
179 closed = true;
180 }
181 catch (IOException e)
182 {
183 closed = false;
184 System.err.println("Error: error closing file.");
185 System.err.println(e.getMessage());
186 }
187 }
188
189 if (!closed)
190 System.exit(1);
191
192 }
193 else
194 {
195 FileInputStream input = null;
197
198 try
200 {
201 input = new FileInputStream (localFilename);
202 }
203 catch (IOException e)
204 {
205 tftp.close();
206 System.err.println("Error: could not open local file for reading.");
207 System.err.println(e.getMessage());
208 System.exit(1);
209 }
210
211 try
213 {
214 tftp.sendFile(remoteFilename, transferMode, input, hostname);
215 }
216 catch (UnknownHostException e)
217 {
218 System.err.println("Error: could not resolve hostname.");
219 System.err.println(e.getMessage());
220 System.exit(1);
221 }
222 catch (IOException e)
223 {
224 System.err.println(
225 "Error: I/O exception occurred while sending file.");
226 System.err.println(e.getMessage());
227 System.exit(1);
228 }
229 finally
230 {
231 tftp.close();
233 try
234 {
235 input.close();
236 closed = true;
237 }
238 catch (IOException e)
239 {
240 closed = false;
241 System.err.println("Error: error closing file.");
242 System.err.println(e.getMessage());
243 }
244 }
245
246 if (!closed)
247 System.exit(1);
248
249 }
250
251 }
252
253 }
254
255
256 |
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