1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
<?php
/**
* MediaWiki exception
* @addtogroup Exception
*/
class MWException extends Exception
{
function useOutputPage() {
return !empty( $GLOBALS['wgFullyInitialised'] ) &&
!empty( $GLOBALS['wgArticle'] ) && !empty( $GLOBALS['wgTitle'] );
}
function useMessageCache() {
global $wgLang;
return is_object( $wgLang );
}
/** Get a message from i18n */
function msg( $key, $fallback /*[, params...] */ ) {
$args = array_slice( func_get_args(), 2 );
if ( $this->useMessageCache() ) {
return wfMsgReal( $key, $args );
} else {
return wfMsgReplaceArgs( $fallback, $args );
}
}
/* If wgShowExceptionDetails, return a HTML message with a backtrace to the error. */
function getHTML() {
global $wgShowExceptionDetails;
if( $wgShowExceptionDetails ) {
return '<p>' . htmlspecialchars( $this->getMessage() ) .
'</p><p>Backtrace:</p><p>' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ) .
"</p>\n";
} else {
return "<p>Set <b><tt>\$wgShowExceptionDetails = true;</tt></b> " .
"in LocalSettings.php to show detailed debugging information.</p>";
}
}
/* If wgShowExceptionDetails, return a text message with a backtrace to the error */
function getText() {
global $wgShowExceptionDetails;
if( $wgShowExceptionDetails ) {
return $this->getMessage() .
"\nBacktrace:\n" . $this->getTraceAsString() . "\n";
} else {
return "<p>Set <tt>\$wgShowExceptionDetails = true;</tt> " .
"in LocalSettings.php to show detailed debugging information.</p>";
}
}
/* Return titles of this error page */
function getPageTitle() {
if ( $this->useMessageCache() ) {
return wfMsg( 'internalerror' );
} else {
global $wgSitename;
return "$wgSitename error";
}
}
/** Return the requested URL and point to file and line number from which the
* exception occured
*/
function getLogMessage() {
global $wgRequest;
$file = $this->getFile();
$line = $this->getLine();
$message = $this->getMessage();
return $wgRequest->getRequestURL() . " Exception from line $line of $file: $message";
}
/** Output the exception report using HTML */
function reportHTML() {
global $wgOut;
if ( $this->useOutputPage() ) {
$wgOut->setPageTitle( $this->getPageTitle() );
$wgOut->setRobotpolicy( "noindex,nofollow" );
$wgOut->setArticleRelated( false );
$wgOut->enableClientCache( false );
$wgOut->redirect( '' );
$wgOut->clearHTML();
$wgOut->addHTML( $this->getHTML() );
$wgOut->output();
} else {
echo $this->htmlHeader();
echo $this->getHTML();
echo $this->htmlFooter();
}
}
/** Print the exception report using text */
function reportText() {
echo $this->getText();
}
/* Output a report about the exception and takes care of formatting.
* It will be either HTML or plain text based on $wgCommandLineMode.
*/
function report() {
global $wgCommandLineMode;
if ( $wgCommandLineMode ) {
$this->reportText();
} else {
$log = $this->getLogMessage();
if ( $log ) {
wfDebugLog( 'exception', $log );
}
$this->reportHTML();
}
}
function htmlHeader() {
global $wgLogo, $wgSitename, $wgOutputEncoding;
if ( !headers_sent() ) {
header( 'HTTP/1.0 500 Internal Server Error' );
header( 'Content-type: text/html; charset='.$wgOutputEncoding );
/* Don't cache error pages! They cause no end of trouble... */
header( 'Cache-control: none' );
header( 'Pragma: nocache' );
}
$title = $this->getPageTitle();
echo "<html>
<head>
<title>$title</title>
</head>
<body>
<h1><img src='$wgLogo' style='float:left;margin-right:1em' alt=''>$title</h1>
";
}
function htmlFooter() {
echo "</body></html>";
}
}
/**
* Exception class which takes an HTML error message, and does not
* produce a backtrace. Replacement for OutputPage::fatalError().
* @addtogroup Exception
*/
class FatalError extends MWException {
function getHTML() {
return $this->getMessage();
}
function getText() {
return $this->getMessage();
}
}
/**
* @addtogroup Exception
*/
class ErrorPageError extends MWException {
public $title, $msg;
/**
* Note: these arguments are keys into wfMsg(), not text!
*/
function __construct( $title, $msg ) {
$this->title = $title;
$this->msg = $msg;
parent::__construct( wfMsg( $msg ) );
}
function report() {
global $wgOut;
$wgOut->showErrorPage( $this->title, $this->msg );
$wgOut->output();
}
}
/**
* Install an exception handler for MediaWiki exception types.
*/
function wfInstallExceptionHandler() {
set_exception_handler( 'wfExceptionHandler' );
}
/**
* Report an exception to the user
*/
function wfReportException( Exception $e ) {
if ( $e instanceof MWException ) {
try {
$e->report();
} catch ( Exception $e2 ) {
// Exception occurred from within exception handler
// Show a simpler error message for the original exception,
// don't try to invoke report()
$message = "MediaWiki internal error.\n\n" .
"Original exception: " . $e->__toString() .
"\n\nException caught inside exception handler: " .
$e2->__toString() . "\n";
if ( !empty( $GLOBALS['wgCommandLineMode'] ) ) {
echo $message;
} else {
echo nl2br( htmlspecialchars( $message ) ). "\n";
}
}
} else {
echo $e->__toString();
}
}
/**
* Exception handler which simulates the appropriate catch() handling:
*
* try {
* ...
* } catch ( MWException $e ) {
* $e->report();
* } catch ( Exception $e ) {
* echo $e->__toString();
* }
*/
function wfExceptionHandler( $e ) {
global $wgFullyInitialised;
wfReportException( $e );
// Final cleanup, similar to wfErrorExit()
if ( $wgFullyInitialised ) {
try {
wfLogProfilingData(); // uses $wgRequest, hence the $wgFullyInitialised condition
} catch ( Exception $e ) {}
}
// Exit value should be nonzero for the benefit of shell jobs
exit( 1 );
}
|
