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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.FileInputStream; 58 import java.io.FileOutputStream; 59 import java.io.IOException; 60 import java.io.InputStream; 61 import java.io.OutputStream; 62 import java.io.PrintWriter; 63 import org.apache.commons.net.ftp.FTP; 64 import org.apache.commons.net.ftp.FTPClient; 65 import org.apache.commons.net.ftp.FTPConnectionClosedException; 66 import org.apache.commons.net.ftp.FTPReply; 67 68 /**** 69 * This is an example program demonstrating how to use the FTPClient class. 70 * This program connects to an FTP server and retrieves the specified 71 * file. If the -s flag is used, it stores the local file at the FTP server. 72 * Just so you can see what's happening, all reply strings are printed. 73 * If the -b flag is used, a binary transfer is assumed (default is ASCII). 74 * <p> 75 * Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file> 76 * <p> 77 ***/ 78 public final class ftp 79 { 80 81 public static final String USAGE = 82 "Usage: ftp [-s] [-b] <hostname> <username> <password> <remote file> <local file>\n" + 83 "\nDefault behavior is to download a file and use ASCII transfer mode.\n" + 84 "\t-s store file on server (upload)\n" + 85 "\t-b use binary transfer mode\n"; 86 87 public static final void main(String[] args) 88 { 89 int base = 0; 90 boolean storeFile = false, binaryTransfer = false, error = false; 91 String server, username, password, remote, local; 92 FTPClient ftp; 93 94 for (base = 0; base < args.length; base++) 95 { 96 if (args[base].startsWith("-s")) 97 storeFile = true; 98 else if (args[base].startsWith("-b")) 99 binaryTransfer = true; 100 else 101 break; 102 } 103 104 if ((args.length - base) != 5) 105 { 106 System.err.println(USAGE); 107 System.exit(1); 108 } 109 110 server = args[base++]; 111 username = args[base++]; 112 password = args[base++]; 113 remote = args[base++]; 114 local = args[base]; 115 116 ftp = new FTPClient(); 117 ftp.addProtocolCommandListener(new PrintCommandListener( 118 new PrintWriter(System.out))); 119 120 try 121 { 122 int reply; 123 ftp.connect(server); 124 System.out.println("Connected to " + server + "."); 125 126 // After connection attempt, you should check the reply code to verify 127 // success. 128 reply = ftp.getReplyCode(); 129 130 if (!FTPReply.isPositiveCompletion(reply)) 131 { 132 ftp.disconnect(); 133 System.err.println("FTP server refused connection."); 134 System.exit(1); 135 } 136 } 137 catch (IOException e) 138 { 139 if (ftp.isConnected()) 140 { 141 try 142 { 143 ftp.disconnect(); 144 } 145 catch (IOException f) 146 { 147 // do nothing 148 } 149 } 150 System.err.println("Could not connect to server."); 151 e.printStackTrace(); 152 System.exit(1); 153 } 154 155 __main: 156 try 157 { 158 if (!ftp.login(username, password)) 159 { 160 ftp.logout(); 161 error = true; 162 break __main; 163 } 164 165 System.out.println("Remote system is " + ftp.getSystemName()); 166 167 if (binaryTransfer) 168 ftp.setFileType(FTP.BINARY_FILE_TYPE); 169 170 // Use passive mode as default because most of us are 171 // behind firewalls these days. 172 ftp.enterLocalPassiveMode(); 173 174 if (storeFile) 175 { 176 InputStream input; 177 178 input = new FileInputStream(local); 179 ftp.storeFile(remote, input); 180 } 181 else 182 { 183 OutputStream output; 184 185 output = new FileOutputStream(local); 186 ftp.retrieveFile(remote, output); 187 } 188 189 ftp.logout(); 190 } 191 catch (FTPConnectionClosedException e) 192 { 193 error = true; 194 System.err.println("Server closed connection."); 195 e.printStackTrace(); 196 } 197 catch (IOException e) 198 { 199 error = true; 200 e.printStackTrace(); 201 } 202 finally 203 { 204 if (ftp.isConnected()) 205 { 206 try 207 { 208 ftp.disconnect(); 209 } 210 catch (IOException f) 211 { 212 // do nothing 213 } 214 } 215 } 216 217 System.exit(error ? 1 : 0); 218 } // end main 219 220 } 221

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