Source Code Cross Referenced for ClientAuthenticationHandler.java in  » Net » QuickServer » org » quickserver » net » server » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Net » QuickServer » org.quickserver.net.server 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file is part of the QuickServer library 
003:         * Copyright (C) 2003-2005 QuickServer.org
004:         *
005:         * Use, modification, copying and distribution of this software is subject to
006:         * the terms and conditions of the GNU Lesser General Public License. 
007:         * You should have received a copy of the GNU LGP License along with this 
008:         * library; if not, you can download a copy from <http://www.quickserver.org/>.
009:         *
010:         * For questions, suggestions, bug-reports, enhancement-requests etc.
011:         * visit http://www.quickserver.org
012:         *
013:         */
014:
015:        package org.quickserver.net.server;
016:
017:        import java.io.*;
018:        import org.quickserver.net.AppException;
019:
020:        /**
021:         * This interface defines a class that can be used by 
022:         * QuickServer to authenticate a client when new connection is
023:         * made to QuickServer. 
024:         * 
025:         * <p>
026:         * Recommendations to be followed when implementing ClientAuthenticationHandler
027:         * <ul>
028:         * <li>Should have a default constructor. 
029:         * <li>Should be thread safe.
030:         * <li>It should not store any data that may is associated with a particular client. 
031:         * <li>If any client data is need to be saved from the client session,  
032:         * it should be saved to a {@link ClientData} class, which can be retrieved 
033:         * using handler.getClientData() method.
034:         * </ul>
035:         * </p>
036:         * <p>
037:         * Ex:
038:         * <code><BLOCKQUOTE><pre>
039:         package echoserver;
040:
041:         import java.net.*;
042:         import java.io.*;
043:         import org.quickserver.net.server.ClientAuthenticationHandler;
044:         import org.quickserver.net.server.ClientHandler;
045:
046:         public class EchoAuthenticationHandler 
047:         implements ClientAuthenticationHandler {
048:
049:         public AuthStatus askAuthentication(ClientHandler handler) 
050:         throws IOException, AppException {
051:         handler.sendClientMsg("Password :");
052:         return null;
053:         }
054:
055:         public AuthStatus handleAuthentication(ClientHandler handler, String data) 
056:         throws IOException, AppException {
057:         if(data.equals("password"))
058:         return AuthStatus.SUCCESS;
059:         else
060:         return AuthStatus.FAILURE;
061:         }
062:
063:         public AuthStatus handleAuthentication(ClientHandler handler, Object data) 
064:         throws IOException, AppException {
065:         if(true) throw new IOException("Object mode not implemented!");
066:         }
067:
068:         public AuthStatus handleAuthentication(ClientHandler handler, byte data[]) 
069:         throws IOException {
070:         if(true) throw new IOException("Byte mode not implemented!");
071:         }
072:         }
073:         </pre></BLOCKQUOTE></code></p>
074:         * @author Akshathkumar Shetty
075:         * @since 1.4.6
076:         */
077:        public interface ClientAuthenticationHandler {
078:            /**
079:             * Method called first time after gotConnected() method is caled on
080:             * ClientEventHandler, if Authenticator is set.
081:             * Should be used to initate a authorisation process, like asking for username.
082:             * @exception java.io.IOException if io error in socket
083:             * @exception AppException if client socket needs to be closed.
084:             * @return AuthStatus that indicates if authorisation states, if null it 
085:             * is treated as authentication not yet finished.
086:             */
087:            public AuthStatus askAuthentication(ClientHandler handler)
088:                    throws IOException, AppException;
089:
090:            /**
091:             * Method called when ever a client sends character/string data
092:             * before authentication.
093:             * @exception java.io.IOException if io error in socket
094:             * @exception AppException if client socket needs to be closed.
095:             * @return AuthStatus that indicates if authorisation states, if null it 
096:             * is treated as authentication not yet finished.
097:             */
098:            public AuthStatus handleAuthentication(ClientHandler handler,
099:                    String data) throws IOException, AppException;
100:
101:            /**
102:             * Method called when ever a client sends Object data
103:             * before authentication.
104:             * @exception java.io.IOException if io error in socket
105:             * @exception AppException if client socket needs to be closed.
106:             * @return AuthStatus that indicates if authorisation states, if null it 
107:             * is treated as authentication not yet finished.
108:             */
109:            public AuthStatus handleAuthentication(ClientHandler handler,
110:                    Object data) throws IOException, AppException;
111:
112:            /**
113:             * Method called when ever a client sends binary data
114:             * before authentication.
115:             * @exception java.io.IOException if io error in socket
116:             * @exception AppException if client socket needs to be closed.
117:             * @return AuthStatus that indicates if authorisation states, if null it 
118:             * is treated as authentication not yet finished.
119:             */
120:            public AuthStatus handleAuthentication(ClientHandler handler,
121:                    byte data[]) throws IOException, AppException;
122:        }
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