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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.IOException; 58 import java.io.PrintWriter; 59 import java.net.InetAddress; 60 import org.apache.commons.net.ProtocolCommandListener; 61 import org.apache.commons.net.ftp.FTPClient; 62 import org.apache.commons.net.ftp.FTPReply; 63 64 /**** 65 * This is an example program demonstrating how to use the FTPClient class. 66 * This program arranges a server to server file transfer that transfers 67 * a file from host1 to host2. Keep in mind, this program might only work 68 * if host2 is the same as the host you run it on (for security reasons, 69 * some ftp servers only allow PORT commands to be issued with a host 70 * argument equal to the client host). 71 * <p> 72 * Usage: ftp <host1> <user1> <pass1> <file1> <host2> <user2> <pass2> <file2> 73 * <p> 74 ***/ 75 public final class server2serverFTP 76 { 77 78 public static final void main(String[] args) 79 { 80 String server1, username1, password1, file1; 81 String server2, username2, password2, file2; 82 FTPClient ftp1, ftp2; 83 ProtocolCommandListener listener; 84 85 if (args.length < 8) 86 { 87 System.err.println( 88 "Usage: ftp <host1> <user1> <pass1> <file1> <host2> <user2> <pass2> <file2>" 89 ); 90 System.exit(1); 91 } 92 93 server1 = args[0]; 94 username1 = args[1]; 95 password1 = args[2]; 96 file1 = args[3]; 97 server2 = args[4]; 98 username2 = args[5]; 99 password2 = args[6]; 100 file2 = args[7]; 101 102 listener = new PrintCommandListener(new PrintWriter(System.out)); 103 ftp1 = new FTPClient(); 104 ftp1.addProtocolCommandListener(listener); 105 ftp2 = new FTPClient(); 106 ftp2.addProtocolCommandListener(listener); 107 108 try 109 { 110 int reply; 111 ftp1.connect(server1); 112 System.out.println("Connected to " + server1 + "."); 113 114 reply = ftp1.getReplyCode(); 115 116 if (!FTPReply.isPositiveCompletion(reply)) 117 { 118 ftp1.disconnect(); 119 System.err.println("FTP server1 refused connection."); 120 System.exit(1); 121 } 122 } 123 catch (IOException e) 124 { 125 if (ftp1.isConnected()) 126 { 127 try 128 { 129 ftp1.disconnect(); 130 } 131 catch (IOException f) 132 { 133 // do nothing 134 } 135 } 136 System.err.println("Could not connect to server1."); 137 e.printStackTrace(); 138 System.exit(1); 139 } 140 141 try 142 { 143 int reply; 144 ftp2.connect(server2); 145 System.out.println("Connected to " + server2 + "."); 146 147 reply = ftp2.getReplyCode(); 148 149 if (!FTPReply.isPositiveCompletion(reply)) 150 { 151 ftp2.disconnect(); 152 System.err.println("FTP server2 refused connection."); 153 System.exit(1); 154 } 155 } 156 catch (IOException e) 157 { 158 if (ftp2.isConnected()) 159 { 160 try 161 { 162 ftp2.disconnect(); 163 } 164 catch (IOException f) 165 { 166 // do nothing 167 } 168 } 169 System.err.println("Could not connect to server2."); 170 e.printStackTrace(); 171 System.exit(1); 172 } 173 174 __main: 175 try 176 { 177 if (!ftp1.login(username1, password1)) 178 { 179 System.err.println("Could not login to " + server1); 180 break __main; 181 } 182 183 if (!ftp2.login(username2, password2)) 184 { 185 System.err.println("Could not login to " + server2); 186 break __main; 187 } 188 189 // Let's just assume success for now. 190 ftp2.enterRemotePassiveMode(); 191 192 ftp1.enterRemoteActiveMode(InetAddress.getByName(ftp2.getPassiveHost()), 193 ftp2.getPassivePort()); 194 195 // Although you would think the store command should be sent to server2 196 // first, in reality, ftp servers like wu-ftpd start accepting data 197 // connections right after entering passive mode. Additionally, they 198 // don't even send the positive preliminary reply until after the 199 // transfer is completed (in the case of passive mode transfers). 200 // Therefore, calling store first would hang waiting for a preliminary 201 // reply. 202 if (ftp1.remoteRetrieve(file1) && ftp2.remoteStoreUnique(file2)) 203 { 204 // if(ftp1.remoteRetrieve(file1) && ftp2.remoteStore(file2)) { 205 // We have to fetch the positive completion reply. 206 ftp1.completePendingCommand(); 207 ftp2.completePendingCommand(); 208 } 209 else 210 { 211 System.err.println( 212 "Couldn't initiate transfer. Check that filenames are valid."); 213 break __main; 214 } 215 216 } 217 catch (IOException e) 218 { 219 e.printStackTrace(); 220 System.exit(1); 221 } 222 finally 223 { 224 try 225 { 226 if (ftp1.isConnected()) 227 { 228 ftp1.logout(); 229 ftp1.disconnect(); 230 } 231 } 232 catch (IOException e) 233 { 234 // do nothing 235 } 236 237 try 238 { 239 if (ftp2.isConnected()) 240 { 241 ftp2.logout(); 242 ftp2.disconnect(); 243 } 244 } 245 catch (IOException e) 246 { 247 // do nothing 248 } 249 } 250 } 251 }

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