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1 package examples; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache Commons" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import java.io.File; 58 import java.io.FileInputStream; 59 import java.io.FileOutputStream; 60 import java.io.IOException; 61 import java.net.SocketException; 62 import java.net.UnknownHostException; 63 import org.apache.commons.net.tftp.TFTP; 64 import org.apache.commons.net.tftp.TFTPClient; 65 66 /**** 67 * This is an example of a simple Java tftp client using NetComponents. 68 * Notice how all of the code is really just argument processing and 69 * error handling. 70 * <p> 71 * Usage: tftp [options] hostname localfile remotefile 72 * hostname - The name of the remote host 73 * localfile - The name of the local file to send or the name to use for 74 * the received file 75 * remotefile - The name of the remote file to receive or the name for 76 * the remote server to use to name the local file being sent. 77 * options: (The default is to assume -r -b) 78 * -s Send a local file 79 * -r Receive a remote file 80 * -a Use ASCII transfer mode 81 * -b Use binary transfer mode 82 * <p> 83 ***/ 84 public final class tftp 85 { 86 static final String USAGE = 87 "Usage: tftp [options] hostname localfile remotefile\n\n" + 88 "hostname - The name of the remote host\n" + 89 "localfile - The name of the local file to send or the name to use for\n" + 90 "\tthe received file\n" + 91 "remotefile - The name of the remote file to receive or the name for\n" + 92 "\tthe remote server to use to name the local file being sent.\n\n" + 93 "options: (The default is to assume -r -b)\n" + 94 "\t-s Send a local file\n" + 95 "\t-r Receive a remote file\n" + 96 "\t-a Use ASCII transfer mode\n" + 97 "\t-b Use binary transfer mode\n"; 98 99 public final static void main(String[] args) 100 { 101 boolean receiveFile = true, closed; 102 int transferMode = TFTP.BINARY_MODE, argc; 103 String arg, hostname, localFilename, remoteFilename; 104 TFTPClient tftp; 105 106 // Parse options 107 for (argc = 0; argc < args.length; argc++) 108 { 109 arg = args[argc]; 110 if (arg.startsWith("-")) 111 { 112 if (arg.equals("-r")) 113 receiveFile = true; 114 else if (arg.equals("-s")) 115 receiveFile = false; 116 else if (arg.equals("-a")) 117 transferMode = TFTP.ASCII_MODE; 118 else if (arg.equals("-b")) 119 transferMode = TFTP.BINARY_MODE; 120 else 121 { 122 System.err.println("Error: unrecognized option."); 123 System.err.print(USAGE); 124 System.exit(1); 125 } 126 } 127 else 128 break; 129 } 130 131 // Make sure there are enough arguments 132 if (args.length - argc != 3) 133 { 134 System.err.println("Error: invalid number of arguments."); 135 System.err.print(USAGE); 136 System.exit(1); 137 } 138 139 // Get host and file arguments 140 hostname = args[argc]; 141 localFilename = args[argc + 1]; 142 remoteFilename = args[argc + 2]; 143 144 // Create our TFTP instance to handle the file transfer. 145 tftp = new TFTPClient(); 146 147 // We want to timeout if a response takes longer than 60 seconds 148 tftp.setDefaultTimeout(60000); 149 150 // Open local socket 151 try 152 { 153 tftp.open(); 154 } 155 catch (SocketException e) 156 { 157 System.err.println("Error: could not open local UDP socket."); 158 System.err.println(e.getMessage()); 159 System.exit(1); 160 } 161 162 // We haven't closed the local file yet. 163 closed = false; 164 165 // If we're receiving a file, receive, otherwise send. 166 if (receiveFile) 167 { 168 FileOutputStream output = null; 169 File file; 170 171 file = new File(localFilename); 172 173 // If file exists, don't overwrite it. 174 if (file.exists()) 175 { 176 System.err.println("Error: " + localFilename + " already exists."); 177 System.exit(1); 178 } 179 180 // Try to open local file for writing 181 try 182 { 183 output = new FileOutputStream(file); 184 } 185 catch (IOException e) 186 { 187 tftp.close(); 188 System.err.println("Error: could not open local file for writing."); 189 System.err.println(e.getMessage()); 190 System.exit(1); 191 } 192 193 // Try to receive remote file via TFTP 194 try 195 { 196 tftp.receiveFile(remoteFilename, transferMode, output, hostname); 197 } 198 catch (UnknownHostException e) 199 { 200 System.err.println("Error: could not resolve hostname."); 201 System.err.println(e.getMessage()); 202 System.exit(1); 203 } 204 catch (IOException e) 205 { 206 System.err.println( 207 "Error: I/O exception occurred while receiving file."); 208 System.err.println(e.getMessage()); 209 System.exit(1); 210 } 211 finally 212 { 213 // Close local socket and output file 214 tftp.close(); 215 try 216 { 217 output.close(); 218 closed = true; 219 } 220 catch (IOException e) 221 { 222 closed = false; 223 System.err.println("Error: error closing file."); 224 System.err.println(e.getMessage()); 225 } 226 } 227 228 if (!closed) 229 System.exit(1); 230 231 } 232 else 233 { 234 // We're sending a file 235 FileInputStream input = null; 236 237 // Try to open local file for reading 238 try 239 { 240 input = new FileInputStream(localFilename); 241 } 242 catch (IOException e) 243 { 244 tftp.close(); 245 System.err.println("Error: could not open local file for reading."); 246 System.err.println(e.getMessage()); 247 System.exit(1); 248 } 249 250 // Try to send local file via TFTP 251 try 252 { 253 tftp.sendFile(remoteFilename, transferMode, input, hostname); 254 } 255 catch (UnknownHostException e) 256 { 257 System.err.println("Error: could not resolve hostname."); 258 System.err.println(e.getMessage()); 259 System.exit(1); 260 } 261 catch (IOException e) 262 { 263 System.err.println( 264 "Error: I/O exception occurred while sending file."); 265 System.err.println(e.getMessage()); 266 System.exit(1); 267 } 268 finally 269 { 270 // Close local socket and input file 271 tftp.close(); 272 try 273 { 274 input.close(); 275 closed = true; 276 } 277 catch (IOException e) 278 { 279 closed = false; 280 System.err.println("Error: error closing file."); 281 System.err.println(e.getMessage()); 282 } 283 } 284 285 if (!closed) 286 System.exit(1); 287 288 } 289 290 } 291 292 } 293 294

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