Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
CommandLineAccessHandler |
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1 | /* | |
2 | * $Source$ | |
3 | * $Revision$ | |
4 | * | |
5 | * Copyright (C) 2006 Tim Pizey | |
6 | * | |
7 | * Part of Melati (http://melati.org), a framework for the rapid | |
8 | * development of clean, maintainable web applications. | |
9 | * | |
10 | * Melati is free software; Permission is granted to copy, distribute | |
11 | * and/or modify this software under the terms either: | |
12 | * | |
13 | * a) the GNU General Public License as published by the Free Software | |
14 | * Foundation; either version 2 of the License, or (at your option) | |
15 | * any later version, | |
16 | * | |
17 | * or | |
18 | * | |
19 | * b) any version of the Melati Software License, as published | |
20 | * at http://melati.org | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License and | |
23 | * the Melati Software License along with this program; | |
24 | * if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the | |
26 | * GNU General Public License and visit http://melati.org to obtain the | |
27 | * Melati Software License. | |
28 | * | |
29 | * Feel free to contact the Developers of Melati (http://melati.org), | |
30 | * if you would like to work out a different arrangement than the options | |
31 | * outlined here. It is our intention to allow Melati to be used by as | |
32 | * wide an audience as possible. | |
33 | * | |
34 | * This program is distributed in the hope that it will be useful, | |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
37 | * GNU General Public License for more details. | |
38 | * | |
39 | * Contact details for copyright holder: | |
40 | * | |
41 | * Tim Pizey <timp At paneris.org> | |
42 | * http://paneris.org/~timp | |
43 | */ | |
44 | package org.melati.login; | |
45 | ||
46 | import java.io.BufferedReader; | |
47 | import java.io.IOException; | |
48 | import java.io.InputStream; | |
49 | import java.io.InputStreamReader; | |
50 | import java.io.PrintStream; | |
51 | ||
52 | import org.melati.Melati; | |
53 | import org.melati.poem.AccessPoemException; | |
54 | import org.melati.poem.PoemThread; | |
55 | import org.melati.poem.User; | |
56 | import org.melati.poem.util.ArrayUtils; | |
57 | import org.melati.util.MelatiException; | |
58 | ||
59 | /** | |
60 | * A handler invoked when an {@link AccessPoemException} is thrown. | |
61 | * | |
62 | * If the application is invoked without a username and password on the command | |
63 | * line then the user will be prompted for them. | |
64 | * | |
65 | * If the usename is supplied then the user will not be prompted as this migth | |
66 | * interfere with use in a scripting environment. | |
67 | * | |
68 | * @see org.melati.login.AccessHandler | |
69 | */ | |
70 | public class CommandLineAccessHandler implements AccessHandler { | |
71 | ||
72 | 16 | private PrintStream output = System.out; |
73 | ||
74 | 16 | private InputStream input = System.in; |
75 | ||
76 | 16 | private boolean commandLineUserCredentialsSet = false; |
77 | ||
78 | 16 | BufferedReader inputReader = null; |
79 | ||
80 | /** | |
81 | * Constructor. | |
82 | */ | |
83 | public CommandLineAccessHandler() { | |
84 | 16 | super(); |
85 | 16 | commandLineUserCredentialsSet = false; |
86 | 16 | } |
87 | ||
88 | ||
89 | /** | |
90 | * Actually handle the {@link AccessPoemException}. | |
91 | * | |
92 | * {@inheritDoc} | |
93 | * | |
94 | * @see org.melati.login.AccessHandler#handleAccessException | |
95 | * (org.melati.Melati, org.melati.poem.AccessPoemException) | |
96 | */ | |
97 | public void handleAccessException(Melati melati, | |
98 | AccessPoemException accessException) throws Exception { | |
99 | 6 | Authorization auth = null; |
100 | 6 | boolean loggedIn = false; |
101 | 6 | if (!commandLineUserCredentialsSet) { |
102 | 4 | inputReader = new BufferedReader(new InputStreamReader(input)); |
103 | 4 | System.err.println(accessException.getMessage()); |
104 | 4 | int goes = 0; |
105 | 12 | while (goes < 3 && loggedIn == false) { |
106 | 8 | goes++; |
107 | 8 | auth = Authorization.from(inputReader, output); |
108 | 8 | if (auth != null) { |
109 | ||
110 | 8 | User user = null; |
111 | // They have tried to log in | |
112 | 8 | if (auth.username != null) { |
113 | 8 | user = (User) melati.getDatabase().getUserTable().getLoginColumn() |
114 | 8 | .firstWhereEq(auth.username); |
115 | } | |
116 | 8 | if (user != null && user.getPassword_unsafe().equals(auth.password)) { |
117 | // Login/password authentication succeeded | |
118 | // Add the arguments to the stored Melati | |
119 | 3 | String[] args = melati.getArguments(); |
120 | 3 | args = (String[]) ArrayUtils.added(args, "-u"); |
121 | 3 | args = (String[]) ArrayUtils.added(args, auth.username); |
122 | 3 | args = (String[]) ArrayUtils.added(args, "-p"); |
123 | 3 | args = (String[]) ArrayUtils.added(args, auth.password); |
124 | 3 | melati.setArguments(args); |
125 | 3 | loggedIn = true; |
126 | 3 | } else { |
127 | 5 | System.err.println("Unknown username"); // ;) |
128 | } | |
129 | 8 | } |
130 | } | |
131 | } | |
132 | 6 | if (!loggedIn) |
133 | 3 | throw accessException; |
134 | 3 | } |
135 | ||
136 | /** | |
137 | * Called when the PoemTask is initialised, recalled after a login. | |
138 | * {@inheritDoc} | |
139 | * | |
140 | * @see org.melati.login.AccessHandler#establishUser(org.melati.Melati) | |
141 | */ | |
142 | public Melati establishUser(Melati melati) { | |
143 | 15 | Authorization auth = Authorization.from(melati.getArguments()); |
144 | 15 | if (auth == null) { |
145 | // No attempt to log in: become `guest' | |
146 | 5 | PoemThread.setAccessToken(melati.getDatabase().guestAccessToken()); |
147 | 5 | return melati; |
148 | } else { | |
149 | 10 | commandLineUserCredentialsSet = true; |
150 | // They have tried to login or set command line parameters | |
151 | 10 | User user = null; |
152 | 10 | user = (User) melati.getDatabase().getUserTable().getLoginColumn() |
153 | 10 | .firstWhereEq(auth.username); |
154 | 10 | if (user == null || !user.getPassword_unsafe().equals(auth.password)) { |
155 | // We just let the user try again as | |
156 | // `guest' and hopefully trigger the same problem and get the same | |
157 | // message all over again. | |
158 | 2 | PoemThread.setAccessToken(melati.getDatabase().guestAccessToken()); |
159 | 2 | return melati; |
160 | } else { | |
161 | // Login/password authentication succeeded | |
162 | 8 | PoemThread.setAccessToken(user); |
163 | 8 | return melati; |
164 | } | |
165 | } | |
166 | } | |
167 | ||
168 | /** | |
169 | * A no-op in a command line application. | |
170 | * | |
171 | * {@inheritDoc} | |
172 | * | |
173 | * @see org.melati.login.AccessHandler#buildRequest(org.melati.Melati) | |
174 | */ | |
175 | public void buildRequest(Melati melati) throws MelatiException, IOException { | |
176 | // Nothing to do here | |
177 | 11 | } |
178 | ||
179 | /** | |
180 | * @param input | |
181 | * The input to set. | |
182 | */ | |
183 | public void setInput(InputStream input) { | |
184 | 10 | this.input = input; |
185 | 10 | } |
186 | ||
187 | /** | |
188 | * @param output | |
189 | * The output to set. | |
190 | */ | |
191 | public void setOutput(PrintStream output) { | |
192 | 3 | this.output = output; |
193 | 3 | } |
194 | ||
195 | } |