summaryrefslogtreecommitdiff
path: root/includes/upload/UploadBase.php
blob: 89ce2b3a167f545fff51c1384efd7bba51a0ac53 (plain)
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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
<?php
/**
 * Base class for the backend of file upload.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 * http://www.gnu.org/copyleft/gpl.html
 *
 * @file
 * @ingroup Upload
 */

/**
 * @defgroup Upload Upload related
 */

/**
 * @ingroup Upload
 *
 * UploadBase and subclasses are the backend of MediaWiki's file uploads.
 * The frontends are formed by ApiUpload and SpecialUpload.
 *
 * @author Brion Vibber
 * @author Bryan Tong Minh
 * @author Michael Dale
 */
abstract class UploadBase {
	protected $mTempPath;
	protected $mDesiredDestName, $mDestName, $mRemoveTempFile, $mSourceType;
	protected $mTitle = false, $mTitleError = 0;
	protected $mFilteredName, $mFinalExtension;
	protected $mLocalFile, $mFileSize, $mFileProps;
	protected $mBlackListedExtensions;
	protected $mJavaDetected, $mSVGNSError;

	protected static $safeXmlEncodings = array(
		'UTF-8',
		'ISO-8859-1',
		'ISO-8859-2',
		'UTF-16',
		'UTF-32'
	);

	const SUCCESS = 0;
	const OK = 0;
	const EMPTY_FILE = 3;
	const MIN_LENGTH_PARTNAME = 4;
	const ILLEGAL_FILENAME = 5;
	const OVERWRITE_EXISTING_FILE = 7; # Not used anymore; handled by verifyTitlePermissions()
	const FILETYPE_MISSING = 8;
	const FILETYPE_BADTYPE = 9;
	const VERIFICATION_ERROR = 10;

	# HOOK_ABORTED is the new name of UPLOAD_VERIFICATION_ERROR
	const UPLOAD_VERIFICATION_ERROR = 11;
	const HOOK_ABORTED = 11;
	const FILE_TOO_LARGE = 12;
	const WINDOWS_NONASCII_FILENAME = 13;
	const FILENAME_TOO_LONG = 14;

	const SESSION_STATUS_KEY = 'wsUploadStatusData';

	/**
	 * @param int $error
	 * @return string
	 */
	public function getVerificationErrorCode( $error ) {
		$code_to_status = array(
			self::EMPTY_FILE => 'empty-file',
			self::FILE_TOO_LARGE => 'file-too-large',
			self::FILETYPE_MISSING => 'filetype-missing',
			self::FILETYPE_BADTYPE => 'filetype-banned',
			self::MIN_LENGTH_PARTNAME => 'filename-tooshort',
			self::ILLEGAL_FILENAME => 'illegal-filename',
			self::OVERWRITE_EXISTING_FILE => 'overwrite',
			self::VERIFICATION_ERROR => 'verification-error',
			self::HOOK_ABORTED => 'hookaborted',
			self::WINDOWS_NONASCII_FILENAME => 'windows-nonascii-filename',
			self::FILENAME_TOO_LONG => 'filename-toolong',
		);
		if ( isset( $code_to_status[$error] ) ) {
			return $code_to_status[$error];
		}

		return 'unknown-error';
	}

	/**
	 * Returns true if uploads are enabled.
	 * Can be override by subclasses.
	 * @return bool
	 */
	public static function isEnabled() {
		global $wgEnableUploads;

		if ( !$wgEnableUploads ) {
			return false;
		}

		# Check php's file_uploads setting
		return wfIsHHVM() || wfIniGetBool( 'file_uploads' );
	}

	/**
	 * Returns true if the user can use this upload module or else a string
	 * identifying the missing permission.
	 * Can be overridden by subclasses.
	 *
	 * @param User $user
	 * @return bool|string
	 */
	public static function isAllowed( $user ) {
		foreach ( array( 'upload', 'edit' ) as $permission ) {
			if ( !$user->isAllowed( $permission ) ) {
				return $permission;
			}
		}

		return true;
	}

	// Upload handlers. Should probably just be a global.
	private static $uploadHandlers = array( 'Stash', 'File', 'Url' );

	/**
	 * Create a form of UploadBase depending on wpSourceType and initializes it
	 *
	 * @param WebRequest $request
	 * @param string|null $type
	 * @return null|UploadBase
	 */
	public static function createFromRequest( &$request, $type = null ) {
		$type = $type ? $type : $request->getVal( 'wpSourceType', 'File' );

		if ( !$type ) {
			return null;
		}

		// Get the upload class
		$type = ucfirst( $type );

		// Give hooks the chance to handle this request
		$className = null;
		wfRunHooks( 'UploadCreateFromRequest', array( $type, &$className ) );
		if ( is_null( $className ) ) {
			$className = 'UploadFrom' . $type;
			wfDebug( __METHOD__ . ": class name: $className\n" );
			if ( !in_array( $type, self::$uploadHandlers ) ) {
				return null;
			}
		}

		// Check whether this upload class is enabled
		if ( !call_user_func( array( $className, 'isEnabled' ) ) ) {
			return null;
		}

		// Check whether the request is valid
		if ( !call_user_func( array( $className, 'isValidRequest' ), $request ) ) {
			return null;
		}

		/** @var UploadBase $handler */
		$handler = new $className;

		$handler->initializeFromRequest( $request );

		return $handler;
	}

	/**
	 * Check whether a request if valid for this handler
	 * @param WebRequest $request
	 * @return bool
	 */
	public static function isValidRequest( $request ) {
		return false;
	}

	public function __construct() {
	}

	/**
	 * Returns the upload type. Should be overridden by child classes
	 *
	 * @since 1.18
	 * @return string
	 */
	public function getSourceType() {
		return null;
	}

	/**
	 * Initialize the path information
	 * @param string $name The desired destination name
	 * @param string $tempPath The temporary path
	 * @param int $fileSize The file size
	 * @param bool $removeTempFile (false) remove the temporary file?
	 * @throws MWException
	 */
	public function initializePathInfo( $name, $tempPath, $fileSize, $removeTempFile = false ) {
		$this->mDesiredDestName = $name;
		if ( FileBackend::isStoragePath( $tempPath ) ) {
			throw new MWException( __METHOD__ . " given storage path `$tempPath`." );
		}
		$this->mTempPath = $tempPath;
		$this->mFileSize = $fileSize;
		$this->mRemoveTempFile = $removeTempFile;
	}

	/**
	 * Initialize from a WebRequest. Override this in a subclass.
	 *
	 * @param WebRequest $request
	 */
	abstract public function initializeFromRequest( &$request );

	/**
	 * Fetch the file. Usually a no-op
	 * @return Status
	 */
	public function fetchFile() {
		return Status::newGood();
	}

	/**
	 * Return true if the file is empty
	 * @return bool
	 */
	public function isEmptyFile() {
		return empty( $this->mFileSize );
	}

	/**
	 * Return the file size
	 * @return int
	 */
	public function getFileSize() {
		return $this->mFileSize;
	}

	/**
	 * Get the base 36 SHA1 of the file
	 * @return string
	 */
	public function getTempFileSha1Base36() {
		return FSFile::getSha1Base36FromPath( $this->mTempPath );
	}

	/**
	 * @param string $srcPath The source path
	 * @return string|bool The real path if it was a virtual URL Returns false on failure
	 */
	function getRealPath( $srcPath ) {
		wfProfileIn( __METHOD__ );
		$repo = RepoGroup::singleton()->getLocalRepo();
		if ( $repo->isVirtualUrl( $srcPath ) ) {
			/** @todo Just make uploads work with storage paths UploadFromStash
			 *  loads files via virtual URLs.
			 */
			$tmpFile = $repo->getLocalCopy( $srcPath );
			if ( $tmpFile ) {
				$tmpFile->bind( $this ); // keep alive with $this
			}
			$path = $tmpFile ? $tmpFile->getPath() : false;
		} else {
			$path = $srcPath;
		}
		wfProfileOut( __METHOD__ );

		return $path;
	}

	/**
	 * Verify whether the upload is sane.
	 * @return mixed Const self::OK or else an array with error information
	 */
	public function verifyUpload() {
		wfProfileIn( __METHOD__ );

		/**
		 * If there was no filename or a zero size given, give up quick.
		 */
		if ( $this->isEmptyFile() ) {
			wfProfileOut( __METHOD__ );

			return array( 'status' => self::EMPTY_FILE );
		}

		/**
		 * Honor $wgMaxUploadSize
		 */
		$maxSize = self::getMaxUploadSize( $this->getSourceType() );
		if ( $this->mFileSize > $maxSize ) {
			wfProfileOut( __METHOD__ );

			return array(
				'status' => self::FILE_TOO_LARGE,
				'max' => $maxSize,
			);
		}

		/**
		 * Look at the contents of the file; if we can recognize the
		 * type but it's corrupt or data of the wrong type, we should
		 * probably not accept it.
		 */
		$verification = $this->verifyFile();
		if ( $verification !== true ) {
			wfProfileOut( __METHOD__ );

			return array(
				'status' => self::VERIFICATION_ERROR,
				'details' => $verification
			);
		}

		/**
		 * Make sure this file can be created
		 */
		$result = $this->validateName();
		if ( $result !== true ) {
			wfProfileOut( __METHOD__ );

			return $result;
		}

		$error = '';
		if ( !wfRunHooks( 'UploadVerification',
			array( $this->mDestName, $this->mTempPath, &$error ) )
		) {
			wfProfileOut( __METHOD__ );

			return array( 'status' => self::HOOK_ABORTED, 'error' => $error );
		}

		wfProfileOut( __METHOD__ );

		return array( 'status' => self::OK );
	}

	/**
	 * Verify that the name is valid and, if necessary, that we can overwrite
	 *
	 * @return mixed True if valid, otherwise and array with 'status'
	 * and other keys
	 */
	public function validateName() {
		$nt = $this->getTitle();
		if ( is_null( $nt ) ) {
			$result = array( 'status' => $this->mTitleError );
			if ( $this->mTitleError == self::ILLEGAL_FILENAME ) {
				$result['filtered'] = $this->mFilteredName;
			}
			if ( $this->mTitleError == self::FILETYPE_BADTYPE ) {
				$result['finalExt'] = $this->mFinalExtension;
				if ( count( $this->mBlackListedExtensions ) ) {
					$result['blacklistedExt'] = $this->mBlackListedExtensions;
				}
			}

			return $result;
		}
		$this->mDestName = $this->getLocalFile()->getName();

		return true;
	}

	/**
	 * Verify the MIME type.
	 *
	 * @note Only checks that it is not an evil MIME. The "does it have
	 *  correct extension given its MIME type?" check is in verifyFile.
	 *  in `verifyFile()` that MIME type and file extension correlate.
	 * @param string $mime Representing the MIME
	 * @return mixed True if the file is verified, an array otherwise
	 */
	protected function verifyMimeType( $mime ) {
		global $wgVerifyMimeType;
		wfProfileIn( __METHOD__ );
		if ( $wgVerifyMimeType ) {
			wfDebug( "mime: <$mime> extension: <{$this->mFinalExtension}>\n" );
			global $wgMimeTypeBlacklist;
			if ( $this->checkFileExtension( $mime, $wgMimeTypeBlacklist ) ) {
				wfProfileOut( __METHOD__ );

				return array( 'filetype-badmime', $mime );
			}

			# Check what Internet Explorer would detect
			$fp = fopen( $this->mTempPath, 'rb' );
			$chunk = fread( $fp, 256 );
			fclose( $fp );

			$magic = MimeMagic::singleton();
			$extMime = $magic->guessTypesForExtension( $this->mFinalExtension );
			$ieTypes = $magic->getIEMimeTypes( $this->mTempPath, $chunk, $extMime );
			foreach ( $ieTypes as $ieType ) {
				if ( $this->checkFileExtension( $ieType, $wgMimeTypeBlacklist ) ) {
					wfProfileOut( __METHOD__ );

					return array( 'filetype-bad-ie-mime', $ieType );
				}
			}
		}

		wfProfileOut( __METHOD__ );

		return true;
	}

	/**
	 * Verifies that it's ok to include the uploaded file
	 *
	 * @return mixed True of the file is verified, array otherwise.
	 */
	protected function verifyFile() {
		global $wgVerifyMimeType;
		wfProfileIn( __METHOD__ );

		$status = $this->verifyPartialFile();
		if ( $status !== true ) {
			wfProfileOut( __METHOD__ );

			return $status;
		}

		$this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );
		$mime = $this->mFileProps['mime'];

		if ( $wgVerifyMimeType ) {
			# XXX: Missing extension will be caught by validateName() via getTitle()
			if ( $this->mFinalExtension != '' && !$this->verifyExtension( $mime, $this->mFinalExtension ) ) {
				wfProfileOut( __METHOD__ );

				return array( 'filetype-mime-mismatch', $this->mFinalExtension, $mime );
			}
		}

		$handler = MediaHandler::getHandler( $mime );
		if ( $handler ) {
			$handlerStatus = $handler->verifyUpload( $this->mTempPath );
			if ( !$handlerStatus->isOK() ) {
				$errors = $handlerStatus->getErrorsArray();
				wfProfileOut( __METHOD__ );

				return reset( $errors );
			}
		}

		wfRunHooks( 'UploadVerifyFile', array( $this, $mime, &$status ) );
		if ( $status !== true ) {
			wfProfileOut( __METHOD__ );

			return $status;
		}

		wfDebug( __METHOD__ . ": all clear; passing.\n" );
		wfProfileOut( __METHOD__ );

		return true;
	}

	/**
	 * A verification routine suitable for partial files
	 *
	 * Runs the blacklist checks, but not any checks that may
	 * assume the entire file is present.
	 *
	 * @return mixed True for valid or array with error message key.
	 */
	protected function verifyPartialFile() {
		global $wgAllowJavaUploads, $wgDisableUploadScriptChecks;
		wfProfileIn( __METHOD__ );

		# getTitle() sets some internal parameters like $this->mFinalExtension
		$this->getTitle();

		$this->mFileProps = FSFile::getPropsFromPath( $this->mTempPath, $this->mFinalExtension );

		# check MIME type, if desired
		$mime = $this->mFileProps['file-mime'];
		$status = $this->verifyMimeType( $mime );
		if ( $status !== true ) {
			wfProfileOut( __METHOD__ );

			return $status;
		}

		# check for htmlish code and javascript
		if ( !$wgDisableUploadScriptChecks ) {
			if ( self::detectScript( $this->mTempPath, $mime, $this->mFinalExtension ) ) {
				wfProfileOut( __METHOD__ );

				return array( 'uploadscripted' );
			}
			if ( $this->mFinalExtension == 'svg' || $mime == 'image/svg+xml' ) {
				$svgStatus = $this->detectScriptInSvg( $this->mTempPath );
				if ( $svgStatus !== false ) {
					wfProfileOut( __METHOD__ );

					return $svgStatus;
				}
			}
		}

		# Check for Java applets, which if uploaded can bypass cross-site
		# restrictions.
		if ( !$wgAllowJavaUploads ) {
			$this->mJavaDetected = false;
			$zipStatus = ZipDirectoryReader::read( $this->mTempPath,
				array( $this, 'zipEntryCallback' ) );
			if ( !$zipStatus->isOK() ) {
				$errors = $zipStatus->getErrorsArray();
				$error = reset( $errors );
				if ( $error[0] !== 'zip-wrong-format' ) {
					wfProfileOut( __METHOD__ );

					return $error;
				}
			}
			if ( $this->mJavaDetected ) {
				wfProfileOut( __METHOD__ );

				return array( 'uploadjava' );
			}
		}

		# Scan the uploaded file for viruses
		$virus = $this->detectVirus( $this->mTempPath );
		if ( $virus ) {
			wfProfileOut( __METHOD__ );

			return array( 'uploadvirus', $virus );
		}

		wfProfileOut( __METHOD__ );

		return true;
	}

	/**
	 * Callback for ZipDirectoryReader to detect Java class files.
	 *
	 * @param array $entry
	 */
	function zipEntryCallback( $entry ) {
		$names = array( $entry['name'] );

		// If there is a null character, cut off the name at it, because JDK's
		// ZIP_GetEntry() uses strcmp() if the name hashes match. If a file name
		// were constructed which had ".class\0" followed by a string chosen to
		// make the hash collide with the truncated name, that file could be
		// returned in response to a request for the .class file.
		$nullPos = strpos( $entry['name'], "\000" );
		if ( $nullPos !== false ) {
			$names[] = substr( $entry['name'], 0, $nullPos );
		}

		// If there is a trailing slash in the file name, we have to strip it,
		// because that's what ZIP_GetEntry() does.
		if ( preg_grep( '!\.class/?$!', $names ) ) {
			$this->mJavaDetected = true;
		}
	}

	/**
	 * Alias for verifyTitlePermissions. The function was originally
	 * 'verifyPermissions', but that suggests it's checking the user, when it's
	 * really checking the title + user combination.
	 *
	 * @param User $user User object to verify the permissions against
	 * @return mixed An array as returned by getUserPermissionsErrors or true
	 *   in case the user has proper permissions.
	 */
	public function verifyPermissions( $user ) {
		return $this->verifyTitlePermissions( $user );
	}

	/**
	 * Check whether the user can edit, upload and create the image. This
	 * checks only against the current title; if it returns errors, it may
	 * very well be that another title will not give errors. Therefore
	 * isAllowed() should be called as well for generic is-user-blocked or
	 * can-user-upload checking.
	 *
	 * @param User $user User object to verify the permissions against
	 * @return mixed An array as returned by getUserPermissionsErrors or true
	 *   in case the user has proper permissions.
	 */
	public function verifyTitlePermissions( $user ) {
		/**
		 * If the image is protected, non-sysop users won't be able
		 * to modify it by uploading a new revision.
		 */
		$nt = $this->getTitle();
		if ( is_null( $nt ) ) {
			return true;
		}
		$permErrors = $nt->getUserPermissionsErrors( 'edit', $user );
		$permErrorsUpload = $nt->getUserPermissionsErrors( 'upload', $user );
		if ( !$nt->exists() ) {
			$permErrorsCreate = $nt->getUserPermissionsErrors( 'create', $user );
		} else {
			$permErrorsCreate = array();
		}
		if ( $permErrors || $permErrorsUpload || $permErrorsCreate ) {
			$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsUpload, $permErrors ) );
			$permErrors = array_merge( $permErrors, wfArrayDiff2( $permErrorsCreate, $permErrors ) );

			return $permErrors;
		}

		$overwriteError = $this->checkOverwrite( $user );
		if ( $overwriteError !== true ) {
			return array( $overwriteError );
		}

		return true;
	}

	/**
	 * Check for non fatal problems with the file.
	 *
	 * This should not assume that mTempPath is set.
	 *
	 * @return array Array of warnings
	 */
	public function checkWarnings() {
		global $wgLang;
		wfProfileIn( __METHOD__ );

		$warnings = array();

		$localFile = $this->getLocalFile();
		$filename = $localFile->getName();

		/**
		 * Check whether the resulting filename is different from the desired one,
		 * but ignore things like ucfirst() and spaces/underscore things
		 */
		$comparableName = str_replace( ' ', '_', $this->mDesiredDestName );
		$comparableName = Title::capitalize( $comparableName, NS_FILE );

		if ( $this->mDesiredDestName != $filename && $comparableName != $filename ) {
			$warnings['badfilename'] = $filename;
			// Debugging for bug 62241
			wfDebugLog( 'upload', "Filename: '$filename', mDesiredDestName: "
				. "'$this->mDesiredDestName', comparableName: '$comparableName'" );
		}

		// Check whether the file extension is on the unwanted list
		global $wgCheckFileExtensions, $wgFileExtensions;
		if ( $wgCheckFileExtensions ) {
			$extensions = array_unique( $wgFileExtensions );
			if ( !$this->checkFileExtension( $this->mFinalExtension, $extensions ) ) {
				$warnings['filetype-unwanted-type'] = array( $this->mFinalExtension,
					$wgLang->commaList( $extensions ), count( $extensions ) );
			}
		}

		global $wgUploadSizeWarning;
		if ( $wgUploadSizeWarning && ( $this->mFileSize > $wgUploadSizeWarning ) ) {
			$warnings['large-file'] = array( $wgUploadSizeWarning, $this->mFileSize );
		}

		if ( $this->mFileSize == 0 ) {
			$warnings['emptyfile'] = true;
		}

		$exists = self::getExistsWarning( $localFile );
		if ( $exists !== false ) {
			$warnings['exists'] = $exists;
		}

		// Check dupes against existing files
		$hash = $this->getTempFileSha1Base36();
		$dupes = RepoGroup::singleton()->findBySha1( $hash );
		$title = $this->getTitle();
		// Remove all matches against self
		foreach ( $dupes as $key => $dupe ) {
			if ( $title->equals( $dupe->getTitle() ) ) {
				unset( $dupes[$key] );
			}
		}
		if ( $dupes ) {
			$warnings['duplicate'] = $dupes;
		}

		// Check dupes against archives
		$archivedImage = new ArchivedFile( null, 0, "{$hash}.{$this->mFinalExtension}" );
		if ( $archivedImage->getID() > 0 ) {
			if ( $archivedImage->userCan( File::DELETED_FILE ) ) {
				$warnings['duplicate-archive'] = $archivedImage->getName();
			} else {
				$warnings['duplicate-archive'] = '';
			}
		}

		wfProfileOut( __METHOD__ );

		return $warnings;
	}

	/**
	 * Really perform the upload. Stores the file in the local repo, watches
	 * if necessary and runs the UploadComplete hook.
	 *
	 * @param string $comment
	 * @param string $pageText
	 * @param bool $watch
	 * @param User $user
	 *
	 * @return Status Indicating the whether the upload succeeded.
	 */
	public function performUpload( $comment, $pageText, $watch, $user ) {
		wfProfileIn( __METHOD__ );

		$status = $this->getLocalFile()->upload(
			$this->mTempPath,
			$comment,
			$pageText,
			File::DELETE_SOURCE,
			$this->mFileProps,
			false,
			$user
		);

		if ( $status->isGood() ) {
			if ( $watch ) {
				WatchAction::doWatch(
					$this->getLocalFile()->getTitle(),
					$user,
					WatchedItem::IGNORE_USER_RIGHTS
				);
			}
			wfRunHooks( 'UploadComplete', array( &$this ) );
		}

		wfProfileOut( __METHOD__ );

		return $status;
	}

	/**
	 * Returns the title of the file to be uploaded. Sets mTitleError in case
	 * the name was illegal.
	 *
	 * @return Title The title of the file or null in case the name was illegal
	 */
	public function getTitle() {
		if ( $this->mTitle !== false ) {
			return $this->mTitle;
		}
		/* Assume that if a user specified File:Something.jpg, this is an error
		 * and that the namespace prefix needs to be stripped of.
		 */
		$title = Title::newFromText( $this->mDesiredDestName );
		if ( $title && $title->getNamespace() == NS_FILE ) {
			$this->mFilteredName = $title->getDBkey();
		} else {
			$this->mFilteredName = $this->mDesiredDestName;
		}

		# oi_archive_name is max 255 bytes, which include a timestamp and an
		# exclamation mark, so restrict file name to 240 bytes.
		if ( strlen( $this->mFilteredName ) > 240 ) {
			$this->mTitleError = self::FILENAME_TOO_LONG;
			$this->mTitle = null;

			return $this->mTitle;
		}

		/**
		 * Chop off any directories in the given filename. Then
		 * filter out illegal characters, and try to make a legible name
		 * out of it. We'll strip some silently that Title would die on.
		 */
		$this->mFilteredName = wfStripIllegalFilenameChars( $this->mFilteredName );
		/* Normalize to title form before we do any further processing */
		$nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
		if ( is_null( $nt ) ) {
			$this->mTitleError = self::ILLEGAL_FILENAME;
			$this->mTitle = null;

			return $this->mTitle;
		}
		$this->mFilteredName = $nt->getDBkey();

		/**
		 * We'll want to blacklist against *any* 'extension', and use
		 * only the final one for the whitelist.
		 */
		list( $partname, $ext ) = $this->splitExtensions( $this->mFilteredName );

		if ( count( $ext ) ) {
			$this->mFinalExtension = trim( $ext[count( $ext ) - 1] );
		} else {
			$this->mFinalExtension = '';

			# No extension, try guessing one
			$magic = MimeMagic::singleton();
			$mime = $magic->guessMimeType( $this->mTempPath );
			if ( $mime !== 'unknown/unknown' ) {
				# Get a space separated list of extensions
				$extList = $magic->getExtensionsForType( $mime );
				if ( $extList ) {
					# Set the extension to the canonical extension
					$this->mFinalExtension = strtok( $extList, ' ' );

					# Fix up the other variables
					$this->mFilteredName .= ".{$this->mFinalExtension}";
					$nt = Title::makeTitleSafe( NS_FILE, $this->mFilteredName );
					$ext = array( $this->mFinalExtension );
				}
			}
		}

		/* Don't allow users to override the blacklist (check file extension) */
		global $wgCheckFileExtensions, $wgStrictFileExtensions;
		global $wgFileExtensions, $wgFileBlacklist;

		$blackListedExtensions = $this->checkFileExtensionList( $ext, $wgFileBlacklist );

		if ( $this->mFinalExtension == '' ) {
			$this->mTitleError = self::FILETYPE_MISSING;
			$this->mTitle = null;

			return $this->mTitle;
		} elseif ( $blackListedExtensions ||
			( $wgCheckFileExtensions && $wgStrictFileExtensions &&
				!$this->checkFileExtension( $this->mFinalExtension, $wgFileExtensions ) )
		) {
			$this->mBlackListedExtensions = $blackListedExtensions;
			$this->mTitleError = self::FILETYPE_BADTYPE;
			$this->mTitle = null;

			return $this->mTitle;
		}

		// Windows may be broken with special characters, see bug 1780
		if ( !preg_match( '/^[\x0-\x7f]*$/', $nt->getText() )
			&& !RepoGroup::singleton()->getLocalRepo()->backendSupportsUnicodePaths()
		) {
			$this->mTitleError = self::WINDOWS_NONASCII_FILENAME;
			$this->mTitle = null;

			return $this->mTitle;
		}

		# If there was more than one "extension", reassemble the base
		# filename to prevent bogus complaints about length
		if ( count( $ext ) > 1 ) {
			$iterations = count( $ext ) - 1;
			for ( $i = 0; $i < $iterations; $i++ ) {
				$partname .= '.' . $ext[$i];
			}
		}

		if ( strlen( $partname ) < 1 ) {
			$this->mTitleError = self::MIN_LENGTH_PARTNAME;
			$this->mTitle = null;

			return $this->mTitle;
		}

		$this->mTitle = $nt;

		return $this->mTitle;
	}

	/**
	 * Return the local file and initializes if necessary.
	 *
	 * @return LocalFile|UploadStashFile|null
	 */
	public function getLocalFile() {
		if ( is_null( $this->mLocalFile ) ) {
			$nt = $this->getTitle();
			$this->mLocalFile = is_null( $nt ) ? null : wfLocalFile( $nt );
		}

		return $this->mLocalFile;
	}

	/**
	 * If the user does not supply all necessary information in the first upload
	 * form submission (either by accident or by design) then we may want to
	 * stash the file temporarily, get more information, and publish the file
	 * later.
	 *
	 * This method will stash a file in a temporary directory for later
	 * processing, and save the necessary descriptive info into the database.
	 * This method returns the file object, which also has a 'fileKey' property
	 * which can be passed through a form or API request to find this stashed
	 * file again.
	 *
	 * @param User $user
	 * @return UploadStashFile Stashed file
	 */
	public function stashFile( User $user = null ) {
		// was stashSessionFile
		wfProfileIn( __METHOD__ );

		$stash = RepoGroup::singleton()->getLocalRepo()->getUploadStash( $user );
		$file = $stash->stashFile( $this->mTempPath, $this->getSourceType() );
		$this->mLocalFile = $file;

		wfProfileOut( __METHOD__ );

		return $file;
	}

	/**
	 * Stash a file in a temporary directory, returning a key which can be used
	 * to find the file again. See stashFile().
	 *
	 * @return string File key
	 */
	public function stashFileGetKey() {
		return $this->stashFile()->getFileKey();
	}

	/**
	 * alias for stashFileGetKey, for backwards compatibility
	 *
	 * @return string File key
	 */
	public function stashSession() {
		return $this->stashFileGetKey();
	}

	/**
	 * If we've modified the upload file we need to manually remove it
	 * on exit to clean up.
	 */
	public function cleanupTempFile() {
		if ( $this->mRemoveTempFile && $this->mTempPath && file_exists( $this->mTempPath ) ) {
			wfDebug( __METHOD__ . ": Removing temporary file {$this->mTempPath}\n" );
			unlink( $this->mTempPath );
		}
	}

	public function getTempPath() {
		return $this->mTempPath;
	}

	/**
	 * Split a file into a base name and all dot-delimited 'extensions'
	 * on the end. Some web server configurations will fall back to
	 * earlier pseudo-'extensions' to determine type and execute
	 * scripts, so the blacklist needs to check them all.
	 *
	 * @param string $filename
	 * @return array
	 */
	public static function splitExtensions( $filename ) {
		$bits = explode( '.', $filename );
		$basename = array_shift( $bits );

		return array( $basename, $bits );
	}

	/**
	 * Perform case-insensitive match against a list of file extensions.
	 * Returns true if the extension is in the list.
	 *
	 * @param string $ext
	 * @param array $list
	 * @return bool
	 */
	public static function checkFileExtension( $ext, $list ) {
		return in_array( strtolower( $ext ), $list );
	}

	/**
	 * Perform case-insensitive match against a list of file extensions.
	 * Returns an array of matching extensions.
	 *
	 * @param array $ext
	 * @param array $list
	 * @return bool
	 */
	public static function checkFileExtensionList( $ext, $list ) {
		return array_intersect( array_map( 'strtolower', $ext ), $list );
	}

	/**
	 * Checks if the MIME type of the uploaded file matches the file extension.
	 *
	 * @param string $mime The MIME type of the uploaded file
	 * @param string $extension The filename extension that the file is to be served with
	 * @return bool
	 */
	public static function verifyExtension( $mime, $extension ) {
		$magic = MimeMagic::singleton();

		if ( !$mime || $mime == 'unknown' || $mime == 'unknown/unknown' ) {
			if ( !$magic->isRecognizableExtension( $extension ) ) {
				wfDebug( __METHOD__ . ": passing file with unknown detected mime type; " .
					"unrecognized extension '$extension', can't verify\n" );

				return true;
			} else {
				wfDebug( __METHOD__ . ": rejecting file with unknown detected mime type; " .
					"recognized extension '$extension', so probably invalid file\n" );

				return false;
			}
		}

		$match = $magic->isMatchingExtension( $extension, $mime );

		if ( $match === null ) {
			if ( $magic->getTypesForExtension( $extension ) !== null ) {
				wfDebug( __METHOD__ . ": No extension known for $mime, but we know a mime for $extension\n" );

				return false;
			} else {
				wfDebug( __METHOD__ . ": no file extension known for mime type $mime, passing file\n" );

				return true;
			}
		} elseif ( $match === true ) {
			wfDebug( __METHOD__ . ": mime type $mime matches extension $extension, passing file\n" );

			/** @todo If it's a bitmap, make sure PHP or ImageMagick resp. can handle it! */
			return true;
		} else {
			wfDebug( __METHOD__
				. ": mime type $mime mismatches file extension $extension, rejecting file\n" );

			return false;
		}
	}

	/**
	 * Heuristic for detecting files that *could* contain JavaScript instructions or
	 * things that may look like HTML to a browser and are thus
	 * potentially harmful. The present implementation will produce false
	 * positives in some situations.
	 *
	 * @param string $file Pathname to the temporary upload file
	 * @param string $mime The MIME type of the file
	 * @param string $extension The extension of the file
	 * @return bool True if the file contains something looking like embedded scripts
	 */
	public static function detectScript( $file, $mime, $extension ) {
		global $wgAllowTitlesInSVG;
		wfProfileIn( __METHOD__ );

		# ugly hack: for text files, always look at the entire file.
		# For binary field, just check the first K.

		if ( strpos( $mime, 'text/' ) === 0 ) {
			$chunk = file_get_contents( $file );
		} else {
			$fp = fopen( $file, 'rb' );
			$chunk = fread( $fp, 1024 );
			fclose( $fp );
		}

		$chunk = strtolower( $chunk );

		if ( !$chunk ) {
			wfProfileOut( __METHOD__ );

			return false;
		}

		# decode from UTF-16 if needed (could be used for obfuscation).
		if ( substr( $chunk, 0, 2 ) == "\xfe\xff" ) {
			$enc = 'UTF-16BE';
		} elseif ( substr( $chunk, 0, 2 ) == "\xff\xfe" ) {
			$enc = 'UTF-16LE';
		} else {
			$enc = null;
		}

		if ( $enc ) {
			$chunk = iconv( $enc, "ASCII//IGNORE", $chunk );
		}

		$chunk = trim( $chunk );

		/** @todo FIXME: Convert from UTF-16 if necessary! */
		wfDebug( __METHOD__ . ": checking for embedded scripts and HTML stuff\n" );

		# check for HTML doctype
		if ( preg_match( "/<!DOCTYPE *X?HTML/i", $chunk ) ) {
			wfProfileOut( __METHOD__ );

			return true;
		}

		// Some browsers will interpret obscure xml encodings as UTF-8, while
		// PHP/expat will interpret the given encoding in the xml declaration (bug 47304)
		if ( $extension == 'svg' || strpos( $mime, 'image/svg' ) === 0 ) {
			if ( self::checkXMLEncodingMissmatch( $file ) ) {
				wfProfileOut( __METHOD__ );

				return true;
			}
		}

		/**
		 * Internet Explorer for Windows performs some really stupid file type
		 * autodetection which can cause it to interpret valid image files as HTML
		 * and potentially execute JavaScript, creating a cross-site scripting
		 * attack vectors.
		 *
		 * Apple's Safari browser also performs some unsafe file type autodetection
		 * which can cause legitimate files to be interpreted as HTML if the
		 * web server is not correctly configured to send the right content-type
		 * (or if you're really uploading plain text and octet streams!)
		 *
		 * Returns true if IE is likely to mistake the given file for HTML.
		 * Also returns true if Safari would mistake the given file for HTML
		 * when served with a generic content-type.
		 */
		$tags = array(
			'<a href',
			'<body',
			'<head',
			'<html', #also in safari
			'<img',
			'<pre',
			'<script', #also in safari
			'<table'
		);

		if ( !$wgAllowTitlesInSVG && $extension !== 'svg' && $mime !== 'image/svg' ) {
			$tags[] = '<title';
		}

		foreach ( $tags as $tag ) {
			if ( false !== strpos( $chunk, $tag ) ) {
				wfDebug( __METHOD__ . ": found something that may make it be mistaken for html: $tag\n" );
				wfProfileOut( __METHOD__ );

				return true;
			}
		}

		/*
		 * look for JavaScript
		 */

		# resolve entity-refs to look at attributes. may be harsh on big files... cache result?
		$chunk = Sanitizer::decodeCharReferences( $chunk );

		# look for script-types
		if ( preg_match( '!type\s*=\s*[\'"]?\s*(?:\w*/)?(?:ecma|java)!sim', $chunk ) ) {
			wfDebug( __METHOD__ . ": found script types\n" );
			wfProfileOut( __METHOD__ );

			return true;
		}

		# look for html-style script-urls
		if ( preg_match( '!(?:href|src|data)\s*=\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
			wfDebug( __METHOD__ . ": found html-style script urls\n" );
			wfProfileOut( __METHOD__ );

			return true;
		}

		# look for css-style script-urls
		if ( preg_match( '!url\s*\(\s*[\'"]?\s*(?:ecma|java)script:!sim', $chunk ) ) {
			wfDebug( __METHOD__ . ": found css-style script urls\n" );
			wfProfileOut( __METHOD__ );

			return true;
		}

		wfDebug( __METHOD__ . ": no scripts found\n" );
		wfProfileOut( __METHOD__ );

		return false;
	}

	/**
	 * Check a whitelist of xml encodings that are known not to be interpreted differently
	 * by the server's xml parser (expat) and some common browsers.
	 *
	 * @param string $file Pathname to the temporary upload file
	 * @return bool True if the file contains an encoding that could be misinterpreted
	 */
	public static function checkXMLEncodingMissmatch( $file ) {
		global $wgSVGMetadataCutoff;
		$contents = file_get_contents( $file, false, null, -1, $wgSVGMetadataCutoff );
		$encodingRegex = '!encoding[ \t\n\r]*=[ \t\n\r]*[\'"](.*?)[\'"]!si';

		if ( preg_match( "!<\?xml\b(.*?)\?>!si", $contents, $matches ) ) {
			if ( preg_match( $encodingRegex, $matches[1], $encMatch )
				&& !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
			) {
				wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );

				return true;
			}
		} elseif ( preg_match( "!<\?xml\b!si", $contents ) ) {
			// Start of XML declaration without an end in the first $wgSVGMetadataCutoff
			// bytes. There shouldn't be a legitimate reason for this to happen.
			wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );

			return true;
		} elseif ( substr( $contents, 0, 4 ) == "\x4C\x6F\xA7\x94" ) {
			// EBCDIC encoded XML
			wfDebug( __METHOD__ . ": EBCDIC Encoded XML\n" );

			return true;
		}

		// It's possible the file is encoded with multi-byte encoding, so re-encode attempt to
		// detect the encoding in case is specifies an encoding not whitelisted in self::$safeXmlEncodings
		$attemptEncodings = array( 'UTF-16', 'UTF-16BE', 'UTF-32', 'UTF-32BE' );
		foreach ( $attemptEncodings as $encoding ) {
			wfSuppressWarnings();
			$str = iconv( $encoding, 'UTF-8', $contents );
			wfRestoreWarnings();
			if ( $str != '' && preg_match( "!<\?xml\b(.*?)\?>!si", $str, $matches ) ) {
				if ( preg_match( $encodingRegex, $matches[1], $encMatch )
					&& !in_array( strtoupper( $encMatch[1] ), self::$safeXmlEncodings )
				) {
					wfDebug( __METHOD__ . ": Found unsafe XML encoding '{$encMatch[1]}'\n" );

					return true;
				}
			} elseif ( $str != '' && preg_match( "!<\?xml\b!si", $str ) ) {
				// Start of XML declaration without an end in the first $wgSVGMetadataCutoff
				// bytes. There shouldn't be a legitimate reason for this to happen.
				wfDebug( __METHOD__ . ": Unmatched XML declaration start\n" );

				return true;
			}
		}

		return false;
	}

	/**
	 * @param string $filename
	 * @return mixed False of the file is verified (does not contain scripts), array otherwise.
	 */
	protected function detectScriptInSvg( $filename ) {
		$this->mSVGNSError = false;
		$check = new XmlTypeCheck(
			$filename,
			array( $this, 'checkSvgScriptCallback' ),
			true,
			array( 'processing_instruction_handler' => 'UploadBase::checkSvgPICallback' )
		);
		if ( $check->wellFormed !== true ) {
			// Invalid xml (bug 58553)
			return array( 'uploadinvalidxml' );
		} elseif ( $check->filterMatch ) {
			if ( $this->mSVGNSError ) {
				return array( 'uploadscriptednamespace', $this->mSVGNSError );
			}

			return array( 'uploadscripted' );
		}

		return false;
	}

	/**
	 * Callback to filter SVG Processing Instructions.
	 * @param string $target Processing instruction name
	 * @param string $data Processing instruction attribute and value
	 * @return bool (true if the filter identified something bad)
	 */
	public static function checkSvgPICallback( $target, $data ) {
		// Don't allow external stylesheets (bug 57550)
		if ( preg_match( '/xml-stylesheet/i', $target ) ) {
			return true;
		}

		return false;
	}

	/**
	 * @todo Replace this with a whitelist filter!
	 * @param string $element
	 * @param array $attribs
	 * @return bool
	 */
	public function checkSvgScriptCallback( $element, $attribs, $data = null ) {

		list( $namespace, $strippedElement ) = $this->splitXmlNamespace( $element );

		// We specifically don't include:
		// http://www.w3.org/1999/xhtml (bug 60771)
		static $validNamespaces = array(
			'',
			'adobe:ns:meta/',
			'http://creativecommons.org/ns#',
			'http://inkscape.sourceforge.net/dtd/sodipodi-0.dtd',
			'http://ns.adobe.com/adobeillustrator/10.0/',
			'http://ns.adobe.com/adobesvgviewerextensions/3.0/',
			'http://ns.adobe.com/extensibility/1.0/',
			'http://ns.adobe.com/flows/1.0/',
			'http://ns.adobe.com/illustrator/1.0/',
			'http://ns.adobe.com/imagereplacement/1.0/',
			'http://ns.adobe.com/pdf/1.3/',
			'http://ns.adobe.com/photoshop/1.0/',
			'http://ns.adobe.com/saveforweb/1.0/',
			'http://ns.adobe.com/variables/1.0/',
			'http://ns.adobe.com/xap/1.0/',
			'http://ns.adobe.com/xap/1.0/g/',
			'http://ns.adobe.com/xap/1.0/g/img/',
			'http://ns.adobe.com/xap/1.0/mm/',
			'http://ns.adobe.com/xap/1.0/rights/',
			'http://ns.adobe.com/xap/1.0/stype/dimensions#',
			'http://ns.adobe.com/xap/1.0/stype/font#',
			'http://ns.adobe.com/xap/1.0/stype/manifestitem#',
			'http://ns.adobe.com/xap/1.0/stype/resourceevent#',
			'http://ns.adobe.com/xap/1.0/stype/resourceref#',
			'http://ns.adobe.com/xap/1.0/t/pg/',
			'http://purl.org/dc/elements/1.1/',
			'http://purl.org/dc/elements/1.1',
			'http://schemas.microsoft.com/visio/2003/svgextensions/',
			'http://sodipodi.sourceforge.net/dtd/sodipodi-0.dtd',
			'http://taptrix.com/inkpad/svg_extensions',
			'http://web.resource.org/cc/',
			'http://www.freesoftware.fsf.org/bkchem/cdml',
			'http://www.inkscape.org/namespaces/inkscape',
			'http://www.opengis.net/gml',
			'http://www.w3.org/1999/02/22-rdf-syntax-ns#',
			'http://www.w3.org/2000/svg',
			'http://www.w3.org/tr/rec-rdf-syntax/',
		);

		if ( !in_array( $namespace, $validNamespaces ) ) {
			wfDebug( __METHOD__ . ": Non-svg namespace '$namespace' in uploaded file.\n" );
			/** @todo Return a status object to a closure in XmlTypeCheck, for MW1.21+ */
			$this->mSVGNSError = $namespace;

			return true;
		}

		/*
		 * check for elements that can contain javascript
		 */
		if ( $strippedElement == 'script' ) {
			wfDebug( __METHOD__ . ": Found script element '$element' in uploaded file.\n" );

			return true;
		}

		# e.g., <svg xmlns="http://www.w3.org/2000/svg">
		#  <handler xmlns:ev="http://www.w3.org/2001/xml-events" ev:event="load">alert(1)</handler> </svg>
		if ( $strippedElement == 'handler' ) {
			wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );

			return true;
		}

		# SVG reported in Feb '12 that used xml:stylesheet to generate javascript block
		if ( $strippedElement == 'stylesheet' ) {
			wfDebug( __METHOD__ . ": Found scriptable element '$element' in uploaded file.\n" );

			return true;
		}

		# Block iframes, in case they pass the namespace check
		if ( $strippedElement == 'iframe' ) {
			wfDebug( __METHOD__ . ": iframe in uploaded file.\n" );

			return true;
		}

		# Check <style> css
		if ( $strippedElement == 'style'
			&& self::checkCssFragment( Sanitizer::normalizeCss( $data ) )
		) {
			wfDebug( __METHOD__ . ": hostile css in style element.\n" );
			return true;
		}

		foreach ( $attribs as $attrib => $value ) {
			$stripped = $this->stripXmlNamespace( $attrib );
			$value = strtolower( $value );

			if ( substr( $stripped, 0, 2 ) == 'on' ) {
				wfDebug( __METHOD__
					. ": Found event-handler attribute '$attrib'='$value' in uploaded file.\n" );

				return true;
			}

			# href with non-local target (don't allow http://, javascript:, etc)
			if ( $stripped == 'href'
				&& strpos( $value, 'data:' ) !== 0
				&& strpos( $value, '#' ) !== 0
			) {
				if ( !( $strippedElement === 'a'
					&& preg_match( '!^https?://!im', $value ) )
				) {
					wfDebug( __METHOD__ . ": Found href attribute <$strippedElement "
						. "'$attrib'='$value' in uploaded file.\n" );

					return true;
				}
			}

			# href with embedded svg as target
			if ( $stripped == 'href' && preg_match( '!data:[^,]*image/svg[^,]*,!sim', $value ) ) {
				wfDebug( __METHOD__ . ": Found href to embedded svg "
					. "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );

				return true;
			}

			# href with embedded (text/xml) svg as target
			if ( $stripped == 'href' && preg_match( '!data:[^,]*text/xml[^,]*,!sim', $value ) ) {
				wfDebug( __METHOD__ . ": Found href to embedded svg "
					. "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );

				return true;
			}

			# Change href with animate from (http://html5sec.org/#137). This doesn't seem
			# possible without embedding the svg, but filter here in case.
			if ( $stripped == 'from'
				&& $strippedElement === 'animate'
				&& !preg_match( '!^https?://!im', $value )
			) {
				wfDebug( __METHOD__ . ": Found animate that might be changing href using from "
					. "\"<$strippedElement '$attrib'='$value'...\" in uploaded file.\n" );

				return true;
			}

			# use set/animate to add event-handler attribute to parent
			if ( ( $strippedElement == 'set' || $strippedElement == 'animate' )
				&& $stripped == 'attributename'
				&& substr( $value, 0, 2 ) == 'on'
			) {
				wfDebug( __METHOD__ . ": Found svg setting event-handler attribute with "
					. "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );

				return true;
			}

			# use set to add href attribute to parent element
			if ( $strippedElement == 'set'
				&& $stripped == 'attributename'
				&& strpos( $value, 'href' ) !== false
			) {
				wfDebug( __METHOD__ . ": Found svg setting href attribute '$value' in uploaded file.\n" );

				return true;
			}

			# use set to add a remote / data / script target to an element
			if ( $strippedElement == 'set'
				&& $stripped == 'to'
				&& preg_match( '!(http|https|data|script):!sim', $value )
			) {
				wfDebug( __METHOD__ . ": Found svg setting attribute to '$value' in uploaded file.\n" );

				return true;
			}

			# use handler attribute with remote / data / script
			if ( $stripped == 'handler' && preg_match( '!(http|https|data|script):!sim', $value ) ) {
				wfDebug( __METHOD__ . ": Found svg setting handler with remote/data/script "
					. "'$attrib'='$value' in uploaded file.\n" );

				return true;
			}

			# use CSS styles to bring in remote code
			if ( $stripped == 'style'
				&& self::checkCssFragment( Sanitizer::normalizeCss( $value ) )
			) {
				wfDebug( __METHOD__ . ": Found svg setting a style with "
					. "remote url '$attrib'='$value' in uploaded file.\n" );
				return true;
			}

			# Several attributes can include css, css character escaping isn't allowed
			$cssAttrs = array( 'font', 'clip-path', 'fill', 'filter', 'marker',
				'marker-end', 'marker-mid', 'marker-start', 'mask', 'stroke' );
			if ( in_array( $stripped, $cssAttrs )
				&& self::checkCssFragment( $value )
			) {
				wfDebug( __METHOD__ . ": Found svg setting a style with "
					. "remote url '$attrib'='$value' in uploaded file.\n" );
				return true;
			}

			# image filters can pull in url, which could be svg that executes scripts
			if ( $strippedElement == 'image'
				&& $stripped == 'filter'
				&& preg_match( '!url\s*\(!sim', $value )
			) {
				wfDebug( __METHOD__ . ": Found image filter with url: "
					. "\"<$strippedElement $stripped='$value'...\" in uploaded file.\n" );

				return true;
			}
		}

		return false; //No scripts detected
	}

	/**
	 * Check a block of CSS or CSS fragment for anything that looks like
	 * it is bringing in remote code.
	 * @param string $value a string of CSS
	 * @param bool $propOnly only check css properties (start regex with :)
	 * @return bool true if the CSS contains an illegal string, false if otherwise
	 */
	private static function checkCssFragment( $value ) {

		# Forbid external stylesheets, for both reliability and to protect viewer's privacy
		if ( strpos( $value, '@import' ) !== false ) {
			return true;
		}

		# We allow @font-face to embed fonts with data: urls, so we snip the string
		# 'url' out so this case won't match when we check for urls below
		$pattern = '!(@font-face\s*{[^}]*src:)url(\("data:;base64,)!im';
		$value = preg_replace( $pattern, '$1$2', $value );

		# Check for remote and executable CSS. Unlike in Sanitizer::checkCss, the CSS
		# properties filter and accelerator don't seem to be useful for xss in SVG files.
		# Expression and -o-link don't seem to work either, but filtering them here in case.
		# Additionally, we catch remote urls like url("http:..., url('http:..., url(http:...,
		# but not local ones such as url("#..., url('#..., url(#....
		if ( preg_match( '!expression
				| -o-link\s*:
				| -o-link-source\s*:
				| -o-replace\s*:!imx', $value ) ) {
			return true;
		}

		if ( preg_match_all(
				"!(\s*(url|image|image-set)\s*\(\s*[\"']?\s*[^#]+.*?\))!sim",
				$value,
				$matches
			) !== 0
		) {
			# TODO: redo this in one regex. Until then, url("#whatever") matches the first
			foreach ( $matches[1] as $match ) {
				if ( !preg_match( "!\s*(url|image|image-set)\s*\(\s*(#|'#|\"#)!im", $match ) ) {
					return true;
				}
			}
		}

		if ( preg_match( '/[\000-\010\013\016-\037\177]/', $value ) ) {
			return true;
		}

		return false;
	}

	/**
	 * Divide the element name passed by the xml parser to the callback into URI and prifix.
	 * @param string $element
	 * @return array Containing the namespace URI and prefix
	 */
	private static function splitXmlNamespace( $element ) {
		// 'http://www.w3.org/2000/svg:script' -> array( 'http://www.w3.org/2000/svg', 'script' )
		$parts = explode( ':', strtolower( $element ) );
		$name = array_pop( $parts );
		$ns = implode( ':', $parts );

		return array( $ns, $name );
	}

	/**
	 * @param string $name
	 * @return string
	 */
	private function stripXmlNamespace( $name ) {
		// 'http://www.w3.org/2000/svg:script' -> 'script'
		$parts = explode( ':', strtolower( $name ) );

		return array_pop( $parts );
	}

	/**
	 * Generic wrapper function for a virus scanner program.
	 * This relies on the $wgAntivirus and $wgAntivirusSetup variables.
	 * $wgAntivirusRequired may be used to deny upload if the scan fails.
	 *
	 * @param string $file Pathname to the temporary upload file
	 * @return mixed False if not virus is found, null if the scan fails or is disabled,
	 *   or a string containing feedback from the virus scanner if a virus was found.
	 *   If textual feedback is missing but a virus was found, this function returns true.
	 */
	public static function detectVirus( $file ) {
		global $wgAntivirus, $wgAntivirusSetup, $wgAntivirusRequired, $wgOut;
		wfProfileIn( __METHOD__ );

		if ( !$wgAntivirus ) {
			wfDebug( __METHOD__ . ": virus scanner disabled\n" );
			wfProfileOut( __METHOD__ );

			return null;
		}

		if ( !$wgAntivirusSetup[$wgAntivirus] ) {
			wfDebug( __METHOD__ . ": unknown virus scanner: $wgAntivirus\n" );
			$wgOut->wrapWikiMsg( "<div class=\"error\">\n$1\n</div>",
				array( 'virus-badscanner', $wgAntivirus ) );
			wfProfileOut( __METHOD__ );

			return wfMessage( 'virus-unknownscanner' )->text() . " $wgAntivirus";
		}

		# look up scanner configuration
		$command = $wgAntivirusSetup[$wgAntivirus]['command'];
		$exitCodeMap = $wgAntivirusSetup[$wgAntivirus]['codemap'];
		$msgPattern = isset( $wgAntivirusSetup[$wgAntivirus]['messagepattern'] ) ?
			$wgAntivirusSetup[$wgAntivirus]['messagepattern'] : null;

		if ( strpos( $command, "%f" ) === false ) {
			# simple pattern: append file to scan
			$command .= " " . wfEscapeShellArg( $file );
		} else {
			# complex pattern: replace "%f" with file to scan
			$command = str_replace( "%f", wfEscapeShellArg( $file ), $command );
		}

		wfDebug( __METHOD__ . ": running virus scan: $command \n" );

		# execute virus scanner
		$exitCode = false;

		# NOTE: there's a 50 line workaround to make stderr redirection work on windows, too.
		#      that does not seem to be worth the pain.
		#      Ask me (Duesentrieb) about it if it's ever needed.
		$output = wfShellExecWithStderr( $command, $exitCode );

		# map exit code to AV_xxx constants.
		$mappedCode = $exitCode;
		if ( $exitCodeMap ) {
			if ( isset( $exitCodeMap[$exitCode] ) ) {
				$mappedCode = $exitCodeMap[$exitCode];
			} elseif ( isset( $exitCodeMap["*"] ) ) {
				$mappedCode = $exitCodeMap["*"];
			}
		}

		/* NB: AV_NO_VIRUS is 0 but AV_SCAN_FAILED is false,
		 * so we need the strict equalities === and thus can't use a switch here
		 */
		if ( $mappedCode === AV_SCAN_FAILED ) {
			# scan failed (code was mapped to false by $exitCodeMap)
			wfDebug( __METHOD__ . ": failed to scan $file (code $exitCode).\n" );

			$output = $wgAntivirusRequired
				? wfMessage( 'virus-scanfailed', array( $exitCode ) )->text()
				: null;
		} elseif ( $mappedCode === AV_SCAN_ABORTED ) {
			# scan failed because filetype is unknown (probably imune)
			wfDebug( __METHOD__ . ": unsupported file type $file (code $exitCode).\n" );
			$output = null;
		} elseif ( $mappedCode === AV_NO_VIRUS ) {
			# no virus found
			wfDebug( __METHOD__ . ": file passed virus scan.\n" );
			$output = false;
		} else {
			$output = trim( $output );

			if ( !$output ) {
				$output = true; #if there's no output, return true
			} elseif ( $msgPattern ) {
				$groups = array();
				if ( preg_match( $msgPattern, $output, $groups ) ) {
					if ( $groups[1] ) {
						$output = $groups[1];
					}
				}
			}

			wfDebug( __METHOD__ . ": FOUND VIRUS! scanner feedback: $output \n" );
		}

		wfProfileOut( __METHOD__ );

		return $output;
	}

	/**
	 * Check if there's an overwrite conflict and, if so, if restrictions
	 * forbid this user from performing the upload.
	 *
	 * @param User $user
	 *
	 * @return mixed True on success, array on failure
	 */
	private function checkOverwrite( $user ) {
		// First check whether the local file can be overwritten
		$file = $this->getLocalFile();
		if ( $file->exists() ) {
			if ( !self::userCanReUpload( $user, $file ) ) {
				return array( 'fileexists-forbidden', $file->getName() );
			} else {
				return true;
			}
		}

		/* Check shared conflicts: if the local file does not exist, but
		 * wfFindFile finds a file, it exists in a shared repository.
		 */
		$file = wfFindFile( $this->getTitle() );
		if ( $file && !$user->isAllowed( 'reupload-shared' ) ) {
			return array( 'fileexists-shared-forbidden', $file->getName() );
		}

		return true;
	}

	/**
	 * Check if a user is the last uploader
	 *
	 * @param User $user
	 * @param string $img Image name
	 * @return bool
	 */
	public static function userCanReUpload( User $user, $img ) {
		if ( $user->isAllowed( 'reupload' ) ) {
			return true; // non-conditional
		}
		if ( !$user->isAllowed( 'reupload-own' ) ) {
			return false;
		}
		if ( is_string( $img ) ) {
			$img = wfLocalFile( $img );
		}
		if ( !( $img instanceof LocalFile ) ) {
			return false;
		}

		return $user->getId() == $img->getUser( 'id' );
	}

	/**
	 * Helper function that does various existence checks for a file.
	 * The following checks are performed:
	 * - The file exists
	 * - Article with the same name as the file exists
	 * - File exists with normalized extension
	 * - The file looks like a thumbnail and the original exists
	 *
	 * @param File $file The File object to check
	 * @return mixed False if the file does not exists, else an array
	 */
	public static function getExistsWarning( $file ) {
		if ( $file->exists() ) {
			return array( 'warning' => 'exists', 'file' => $file );
		}

		if ( $file->getTitle()->getArticleID() ) {
			return array( 'warning' => 'page-exists', 'file' => $file );
		}

		if ( $file->wasDeleted() && !$file->exists() ) {
			return array( 'warning' => 'was-deleted', 'file' => $file );
		}

		if ( strpos( $file->getName(), '.' ) == false ) {
			$partname = $file->getName();
			$extension = '';
		} else {
			$n = strrpos( $file->getName(), '.' );
			$extension = substr( $file->getName(), $n + 1 );
			$partname = substr( $file->getName(), 0, $n );
		}
		$normalizedExtension = File::normalizeExtension( $extension );

		if ( $normalizedExtension != $extension ) {
			// We're not using the normalized form of the extension.
			// Normal form is lowercase, using most common of alternate
			// extensions (eg 'jpg' rather than 'JPEG').
			//
			// Check for another file using the normalized form...
			$nt_lc = Title::makeTitle( NS_FILE, "{$partname}.{$normalizedExtension}" );
			$file_lc = wfLocalFile( $nt_lc );

			if ( $file_lc->exists() ) {
				return array(
					'warning' => 'exists-normalized',
					'file' => $file,
					'normalizedFile' => $file_lc
				);
			}
		}

		// Check for files with the same name but a different extension
		$similarFiles = RepoGroup::singleton()->getLocalRepo()->findFilesByPrefix(
			"{$partname}.", 1 );
		if ( count( $similarFiles ) ) {
			return array(
				'warning' => 'exists-normalized',
				'file' => $file,
				'normalizedFile' => $similarFiles[0],
			);
		}

		if ( self::isThumbName( $file->getName() ) ) {
			# Check for filenames like 50px- or 180px-, these are mostly thumbnails
			$nt_thb = Title::newFromText(
				substr( $partname, strpos( $partname, '-' ) + 1 ) . '.' . $extension,
				NS_FILE
			);
			$file_thb = wfLocalFile( $nt_thb );
			if ( $file_thb->exists() ) {
				return array(
					'warning' => 'thumb',
					'file' => $file,
					'thumbFile' => $file_thb
				);
			} else {
				// File does not exist, but we just don't like the name
				return array(
					'warning' => 'thumb-name',
					'file' => $file,
					'thumbFile' => $file_thb
				);
			}
		}

		foreach ( self::getFilenamePrefixBlacklist() as $prefix ) {
			if ( substr( $partname, 0, strlen( $prefix ) ) == $prefix ) {
				return array(
					'warning' => 'bad-prefix',
					'file' => $file,
					'prefix' => $prefix
				);
			}
		}

		return false;
	}

	/**
	 * Helper function that checks whether the filename looks like a thumbnail
	 * @param string $filename
	 * @return bool
	 */
	public static function isThumbName( $filename ) {
		$n = strrpos( $filename, '.' );
		$partname = $n ? substr( $filename, 0, $n ) : $filename;

		return (
			substr( $partname, 3, 3 ) == 'px-' ||
			substr( $partname, 2, 3 ) == 'px-'
		) &&
		preg_match( "/[0-9]{2}/", substr( $partname, 0, 2 ) );
	}

	/**
	 * Get a list of blacklisted filename prefixes from [[MediaWiki:Filename-prefix-blacklist]]
	 *
	 * @return array List of prefixes
	 */
	public static function getFilenamePrefixBlacklist() {
		$blacklist = array();
		$message = wfMessage( 'filename-prefix-blacklist' )->inContentLanguage();
		if ( !$message->isDisabled() ) {
			$lines = explode( "\n", $message->plain() );
			foreach ( $lines as $line ) {
				// Remove comment lines
				$comment = substr( trim( $line ), 0, 1 );
				if ( $comment == '#' || $comment == '' ) {
					continue;
				}
				// Remove additional comments after a prefix
				$comment = strpos( $line, '#' );
				if ( $comment > 0 ) {
					$line = substr( $line, 0, $comment - 1 );
				}
				$blacklist[] = trim( $line );
			}
		}

		return $blacklist;
	}

	/**
	 * Gets image info about the file just uploaded.
	 *
	 * Also has the effect of setting metadata to be an 'indexed tag name' in
	 * returned API result if 'metadata' was requested. Oddly, we have to pass
	 * the "result" object down just so it can do that with the appropriate
	 * format, presumably.
	 *
	 * @param ApiResult $result
	 * @return array Image info
	 */
	public function getImageInfo( $result ) {
		$file = $this->getLocalFile();
		/** @todo This cries out for refactoring.
		 *  We really want to say $file->getAllInfo(); here.
		 * Perhaps "info" methods should be moved into files, and the API should
		 * just wrap them in queries.
		 */
		if ( $file instanceof UploadStashFile ) {
			$imParam = ApiQueryStashImageInfo::getPropertyNames();
			$info = ApiQueryStashImageInfo::getInfo( $file, array_flip( $imParam ), $result );
		} else {
			$imParam = ApiQueryImageInfo::getPropertyNames();
			$info = ApiQueryImageInfo::getInfo( $file, array_flip( $imParam ), $result );
		}

		return $info;
	}

	/**
	 * @param array $error
	 * @return Status
	 */
	public function convertVerifyErrorToStatus( $error ) {
		$code = $error['status'];
		unset( $code['status'] );

		return Status::newFatal( $this->getVerificationErrorCode( $code ), $error );
	}

	/**
	 * @param null|string $forType
	 * @return int
	 */
	public static function getMaxUploadSize( $forType = null ) {
		global $wgMaxUploadSize;

		if ( is_array( $wgMaxUploadSize ) ) {
			if ( !is_null( $forType ) && isset( $wgMaxUploadSize[$forType] ) ) {
				return $wgMaxUploadSize[$forType];
			} else {
				return $wgMaxUploadSize['*'];
			}
		} else {
			return intval( $wgMaxUploadSize );
		}
	}

	/**
	 * Get the current status of a chunked upload (used for polling).
	 * The status will be read from the *current* user session.
	 * @param string $statusKey
	 * @return Status[]|bool
	 */
	public static function getSessionStatus( $statusKey ) {
		return isset( $_SESSION[self::SESSION_STATUS_KEY][$statusKey] )
			? $_SESSION[self::SESSION_STATUS_KEY][$statusKey]
			: false;
	}

	/**
	 * Set the current status of a chunked upload (used for polling).
	 * The status will be stored in the *current* user session.
	 * @param string $statusKey
	 * @param array|bool $value
	 * @return void
	 */
	public static function setSessionStatus( $statusKey, $value ) {
		if ( $value === false ) {
			unset( $_SESSION[self::SESSION_STATUS_KEY][$statusKey] );
		} else {
			$_SESSION[self::SESSION_STATUS_KEY][$statusKey] = $value;
		}
	}
}