Source Code Cross Referenced for FTPDataSocket.java in  » Groupware » hipergate » com » enterprisedt » net » ftp » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Groupware » hipergate » com.enterprisedt.net.ftp 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         *
003:         *  Java FTP client library.
004:         *
005:         *  Copyright (C) 2000-2003  Enterprise Distributed Technologies Ltd
006:         *
007:         *  www.enterprisedt.com
008:         *
009:         *  This library is free software; you can redistribute it and/or
010:         *  modify it under the terms of the GNU Lesser General Public
011:         *  License as published by the Free Software Foundation; either
012:         *  version 2.1 of the License, or (at your option) any later version.
013:         *
014:         *  This library is distributed in the hope that it will be useful,
015:         *  but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
017:         *  Lesser General Public License for more details.
018:         *
019:         *  You should have received a copy of the GNU Lesser General Public
020:         *  License along with this library; if not, write to the Free Software
021:         *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
022:         *
023:         *  Bug fixes, suggestions and comments should be sent to bruce@enterprisedt.com
024:         *
025:         *  Change Log:
026:         *
027:         *        $Log: FTPDataSocket.java,v $
028:         *        Revision 1.1.1.1  2005/06/23 15:22:58  smontoro
029:         *        hipergate backend
030:         *
031:         *        Revision 1.1  2004/02/07 03:15:20  hipergate
032:         *        v2.0 pre-alpha
033:         *
034:         *        Revision 1.3  2003/05/31 14:53:44  bruceb
035:         *        1.2.2 changes
036:         *
037:         *        Revision 1.2  2002/11/19 22:01:25  bruceb
038:         *        changes for 1.2
039:         *
040:         *        Revision 1.1  2001/10/09 20:53:46  bruceb
041:         *        Active mode changes
042:         *
043:         *        Revision 1.1  2001/10/05 14:42:03  bruceb
044:         *        moved from old project
045:         *
046:         */package com.enterprisedt.net.ftp;
047:
048:        import java.io.IOException;
049:        import java.io.InputStream;
050:        import java.io.OutputStream;
051:
052:        import java.net.Socket;
053:        import java.net.ServerSocket;
054:
055:        /**
056:         *  Supports client-side FTP DataSocket in Passive and Active Mode.
057:         *  Wrapper for Socket and ServerSocket. Methods are package access
058:         *  only - not for public use.
059:         *
060:         *  @author      Vladyslav Skarzhevsky
061:         *  @version     $Revision: 1.1.1.1 $
062:         */
063:
064:        public class FTPDataSocket {
065:
066:            /**
067:             *  Revision control id
068:             */
069:            private static String cvsId = "@(#)$Id: FTPDataSocket.java,v 1.1.1.1 2005/06/23 15:22:58 smontoro Exp $";
070:
071:            /**
072:             *  The underlying socket for Active connection.
073:             */
074:            private ServerSocket activeSocket = null;
075:
076:            /**
077:             *  The underlying socket for PASV connection or Socket accepted from server.
078:             */
079:            private Socket passiveSocket = null;
080:
081:            /**
082:             *  Create socket wrapper for Active connection.
083:             */
084:            FTPDataSocket(ServerSocket s) {
085:                activeSocket = s;
086:            }
087:
088:            /**
089:             *  Create socket wrapper for PASV connection.
090:             */
091:            FTPDataSocket(Socket s) {
092:                passiveSocket = s;
093:            }
094:
095:            /**
096:             *   Set the TCP timeout on the underlying control socket.
097:             *
098:             *   If a timeout is set, then any operation which
099:             *   takes longer than the timeout value will be
100:             *   killed with a java.io.InterruptedException.
101:             *
102:             *   @param millis The length of the timeout, in milliseconds
103:             */
104:            void setTimeout(int millis) throws IOException {
105:
106:                if (passiveSocket != null)
107:                    passiveSocket.setSoTimeout(millis);
108:                else if (activeSocket != null)
109:                    activeSocket.setSoTimeout(millis);
110:            }
111:
112:            /**
113:             *  If active mode, accepts the FTP server's connection - in PASV,
114:             *  we are already connected. Then gets the output stream of
115:             *  the connection
116:             *
117:             *  @return  output stream for underlying socket.
118:             */
119:            OutputStream getOutputStream() throws IOException {
120:
121:                if (passiveSocket != null) {
122:                    return passiveSocket.getOutputStream();
123:                } else {
124:                    // accept socket from server, in Active mode
125:                    passiveSocket = activeSocket.accept();
126:                    // get and return its OutputStream
127:                    return passiveSocket.getOutputStream();
128:                }
129:            }
130:
131:            /**
132:             *  If active mode, accepts the FTP server's connection - in PASV,
133:             *  we are already connected. Then gets the input stream of
134:             *  the connection
135:             *
136:             *  @return  input stream for underlying socket.
137:             */
138:            InputStream getInputStream() throws IOException {
139:
140:                if (passiveSocket != null) {
141:                    return passiveSocket.getInputStream();
142:                } else {
143:                    // accept socket from server, in Active mode
144:                    passiveSocket = activeSocket.accept();
145:                    // get and return it's InputStream
146:                    return passiveSocket.getInputStream();
147:                }
148:            }
149:
150:            /**
151:             *  Closes underlying sockets.
152:             */
153:            void close() throws IOException {
154:
155:                if (passiveSocket != null)
156:                    passiveSocket.close();
157:                if (activeSocket != null)
158:                    activeSocket.close();
159:            }
160:        }
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