| 1 | /* PassiveModeDTP.java -- |
| 2 | Copyright (C) 2003, 2004 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Classpath. |
| 5 | |
| 6 | GNU Classpath is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Classpath is distributed in the hope that it will be useful, but |
| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Classpath; see the file COPYING. If not, write to the |
| 18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 19 | 02110-1301 USA. |
| 20 | |
| 21 | Linking this library statically or dynamically with other modules is |
| 22 | making a combined work based on this library. Thus, the terms and |
| 23 | conditions of the GNU General Public License cover the whole |
| 24 | combination. |
| 25 | |
| 26 | As a special exception, the copyright holders of this library give you |
| 27 | permission to link this library with independent modules to produce an |
| 28 | executable, regardless of the license terms of these independent |
| 29 | modules, and to copy and distribute the resulting executable under |
| 30 | terms of your choice, provided that you also meet, for each linked |
| 31 | independent module, the terms and conditions of the license of that |
| 32 | module. An independent module is a module which is not derived from |
| 33 | or based on this library. If you modify this library, you may extend |
| 34 | this exception to your version of the library, but you are not |
| 35 | obligated to do so. If you do not wish to do so, delete this |
| 36 | exception statement from your version. */ |
| 37 | |
| 38 | |
| 39 | package gnu.java.net.protocol.ftp; |
| 40 | |
| 41 | import java.io.IOException; |
| 42 | import java.io.InputStream; |
| 43 | import java.io.OutputStream; |
| 44 | import java.net.InetAddress; |
| 45 | import java.net.InetSocketAddress; |
| 46 | import java.net.Socket; |
| 47 | |
| 48 | /** |
| 49 | * A passive mode FTP data transfer process. |
| 50 | * This connects to the host specified and proxies the resulting socket's |
| 51 | * input and output streams. |
| 52 | * |
| 53 | * @author Chris Burdess (dog@gnu.org) |
| 54 | */ |
| 55 | final class PassiveModeDTP |
| 56 | implements DTP |
| 57 | { |
| 58 | |
| 59 | final String address; |
| 60 | final int port; |
| 61 | Socket socket; |
| 62 | DTPInputStream in; |
| 63 | DTPOutputStream out; |
| 64 | boolean completed; |
| 65 | boolean inProgress; |
| 66 | int transferMode; |
| 67 | |
| 68 | PassiveModeDTP(String address, int port, InetAddress localhost, |
| 69 | int connectionTimeout, int timeout) |
| 70 | throws IOException |
| 71 | { |
| 72 | this.address = address; |
| 73 | this.port = port; |
| 74 | completed = false; |
| 75 | inProgress = false; |
| 76 | socket = new Socket(); |
| 77 | InetSocketAddress remote = new InetSocketAddress(address, port); |
| 78 | InetSocketAddress local = new InetSocketAddress(localhost, port + 1); |
| 79 | socket.bind(local); |
| 80 | if (connectionTimeout > 0) |
| 81 | { |
| 82 | socket.connect(remote, connectionTimeout); |
| 83 | } |
| 84 | else |
| 85 | { |
| 86 | socket.connect(remote); |
| 87 | } |
| 88 | if (timeout > 0) |
| 89 | { |
| 90 | socket.setSoTimeout(timeout); |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | /** |
| 95 | * Returns an input stream from which a remote file can be read. |
| 96 | */ |
| 97 | public InputStream getInputStream() |
| 98 | throws IOException |
| 99 | { |
| 100 | if (inProgress) |
| 101 | { |
| 102 | throw new IOException("Transfer in progress"); |
| 103 | } |
| 104 | switch (transferMode) |
| 105 | { |
| 106 | case FTPConnection.MODE_STREAM: |
| 107 | in = new StreamInputStream(this, socket.getInputStream()); |
| 108 | break; |
| 109 | case FTPConnection.MODE_BLOCK: |
| 110 | in = new BlockInputStream(this, socket.getInputStream()); |
| 111 | break; |
| 112 | case FTPConnection.MODE_COMPRESSED: |
| 113 | in = new CompressedInputStream(this, socket.getInputStream()); |
| 114 | break; |
| 115 | default: |
| 116 | throw new IllegalStateException("Invalid transfer mode"); |
| 117 | } |
| 118 | in.setTransferComplete(false); |
| 119 | return in; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Returns an output stream to which a local file can be written for |
| 124 | * upload. |
| 125 | */ |
| 126 | public OutputStream getOutputStream() |
| 127 | throws IOException |
| 128 | { |
| 129 | if (inProgress) |
| 130 | { |
| 131 | throw new IOException("Transfer in progress"); |
| 132 | } |
| 133 | switch (transferMode) |
| 134 | { |
| 135 | case FTPConnection.MODE_STREAM: |
| 136 | out = new StreamOutputStream(this, socket.getOutputStream()); |
| 137 | break; |
| 138 | case FTPConnection.MODE_BLOCK: |
| 139 | out = new BlockOutputStream(this, socket.getOutputStream()); |
| 140 | break; |
| 141 | case FTPConnection.MODE_COMPRESSED: |
| 142 | out = new CompressedOutputStream(this, socket.getOutputStream()); |
| 143 | break; |
| 144 | default: |
| 145 | throw new IllegalStateException("Invalid transfer mode"); |
| 146 | } |
| 147 | out.setTransferComplete(false); |
| 148 | return out; |
| 149 | } |
| 150 | |
| 151 | public void setTransferMode(int mode) |
| 152 | { |
| 153 | transferMode = mode; |
| 154 | } |
| 155 | |
| 156 | public void complete() |
| 157 | { |
| 158 | completed = true; |
| 159 | if (!inProgress) |
| 160 | { |
| 161 | transferComplete(); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | public boolean abort() |
| 166 | { |
| 167 | completed = true; |
| 168 | transferComplete(); |
| 169 | return inProgress; |
| 170 | } |
| 171 | |
| 172 | /* |
| 173 | * Called by DTPInputStream or DTPOutputStream when end of |
| 174 | * stream is reached. |
| 175 | */ |
| 176 | public void transferComplete() |
| 177 | { |
| 178 | if (in != null) |
| 179 | { |
| 180 | in.setTransferComplete(true); |
| 181 | } |
| 182 | if (out != null) |
| 183 | { |
| 184 | out.setTransferComplete(true); |
| 185 | } |
| 186 | inProgress = false; |
| 187 | completed = completed ||(transferMode == FTPConnection.MODE_STREAM); |
| 188 | if (completed && socket != null) |
| 189 | { |
| 190 | try |
| 191 | { |
| 192 | socket.close(); |
| 193 | } |
| 194 | catch (IOException e) |
| 195 | { |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | |
| 200 | } |
| 201 | |