MediaWiki  master
IEContentAnalyzer.php
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1 <?php
31  protected $baseTypeTable = [
32  'ambiguous' /*1*/ => [
33  'text/plain',
34  'application/octet-stream',
35  'application/x-netcdf', // [sic]
36  ],
37  'text' /*3*/ => [
38  'text/richtext', 'image/x-bitmap', 'application/postscript', 'application/base64',
39  'application/macbinhex40', 'application/x-cdf', 'text/scriptlet'
40  ],
41  'binary' /*4*/ => [
42  'application/pdf', 'audio/x-aiff', 'audio/basic', 'audio/wav', 'image/gif',
43  'image/pjpeg', 'image/jpeg', 'image/tiff', 'image/x-png', 'image/png', 'image/bmp',
44  'image/x-jg', 'image/x-art', 'image/x-emf', 'image/x-wmf', 'video/avi',
45  'video/x-msvideo', 'video/mpeg', 'application/x-compressed',
46  'application/x-zip-compressed', 'application/x-gzip-compressed', 'application/java',
47  'application/x-msdownload'
48  ],
49  'html' /*5*/ => [ 'text/html' ],
50  ];
51 
55  protected $addedTypes = [
56  'ie07' => [
57  'text' => [ 'text/xml', 'application/xml' ]
58  ],
59  ];
60 
67  protected $registry = [
68  '.323' => 'text/h323',
69  '.3g2' => 'video/3gpp2',
70  '.3gp' => 'video/3gpp',
71  '.3gp2' => 'video/3gpp2',
72  '.3gpp' => 'video/3gpp',
73  '.aac' => 'audio/aac',
74  '.ac3' => 'audio/ac3',
75  '.accda' => 'application/msaccess',
76  '.accdb' => 'application/msaccess',
77  '.accdc' => 'application/msaccess',
78  '.accde' => 'application/msaccess',
79  '.accdr' => 'application/msaccess',
80  '.accdt' => 'application/msaccess',
81  '.ade' => 'application/msaccess',
82  '.adp' => 'application/msaccess',
83  '.adts' => 'audio/aac',
84  '.ai' => 'application/postscript',
85  '.aif' => 'audio/aiff',
86  '.aifc' => 'audio/aiff',
87  '.aiff' => 'audio/aiff',
88  '.amc' => 'application/x-mpeg',
89  '.application' => 'application/x-ms-application',
90  '.asf' => 'video/x-ms-asf',
91  '.asx' => 'video/x-ms-asf',
92  '.au' => 'audio/basic',
93  '.avi' => 'video/avi',
94  '.bmp' => 'image/bmp',
95  '.caf' => 'audio/x-caf',
96  '.cat' => 'application/vnd.ms-pki.seccat',
97  '.cbo' => 'application/sha',
98  '.cdda' => 'audio/aiff',
99  '.cer' => 'application/x-x509-ca-cert',
100  '.conf' => 'text/plain',
101  '.crl' => 'application/pkix-crl',
102  '.crt' => 'application/x-x509-ca-cert',
103  '.css' => 'text/css',
104  '.csv' => 'application/vnd.ms-excel',
105  '.der' => 'application/x-x509-ca-cert',
106  '.dib' => 'image/bmp',
107  '.dif' => 'video/x-dv',
108  '.dll' => 'application/x-msdownload',
109  '.doc' => 'application/msword',
110  '.docm' => 'application/vnd.ms-word.document.macroEnabled.12',
111  '.docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
112  '.dot' => 'application/msword',
113  '.dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
114  '.dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
115  '.dv' => 'video/x-dv',
116  '.dwfx' => 'model/vnd.dwfx+xps',
117  '.edn' => 'application/vnd.adobe.edn',
118  '.eml' => 'message/rfc822',
119  '.eps' => 'application/postscript',
120  '.etd' => 'application/x-ebx',
121  '.exe' => 'application/x-msdownload',
122  '.fdf' => 'application/vnd.fdf',
123  '.fif' => 'application/fractals',
124  '.gif' => 'image/gif',
125  '.gsm' => 'audio/x-gsm',
126  '.hqx' => 'application/mac-binhex40',
127  '.hta' => 'application/hta',
128  '.htc' => 'text/x-component',
129  '.htm' => 'text/html',
130  '.html' => 'text/html',
131  '.htt' => 'text/webviewhtml',
132  '.hxa' => 'application/xml',
133  '.hxc' => 'application/xml',
134  '.hxd' => 'application/octet-stream',
135  '.hxe' => 'application/xml',
136  '.hxf' => 'application/xml',
137  '.hxh' => 'application/octet-stream',
138  '.hxi' => 'application/octet-stream',
139  '.hxk' => 'application/xml',
140  '.hxq' => 'application/octet-stream',
141  '.hxr' => 'application/octet-stream',
142  '.hxs' => 'application/octet-stream',
143  '.hxt' => 'application/xml',
144  '.hxv' => 'application/xml',
145  '.hxw' => 'application/octet-stream',
146  '.ico' => 'image/x-icon',
147  '.iii' => 'application/x-iphone',
148  '.ins' => 'application/x-internet-signup',
149  '.iqy' => 'text/x-ms-iqy',
150  '.isp' => 'application/x-internet-signup',
151  '.jfif' => 'image/jpeg',
152  '.jnlp' => 'application/x-java-jnlp-file',
153  '.jpe' => 'image/jpeg',
154  '.jpeg' => 'image/jpeg',
155  '.jpg' => 'image/jpeg',
156  '.jtx' => 'application/x-jtx+xps',
157  '.latex' => 'application/x-latex',
158  '.log' => 'text/plain',
159  '.m1v' => 'video/mpeg',
160  '.m2v' => 'video/mpeg',
161  '.m3u' => 'audio/x-mpegurl',
162  '.mac' => 'image/x-macpaint',
163  '.man' => 'application/x-troff-man',
164  '.mda' => 'application/msaccess',
165  '.mdb' => 'application/msaccess',
166  '.mde' => 'application/msaccess',
167  '.mfp' => 'application/x-shockwave-flash',
168  '.mht' => 'message/rfc822',
169  '.mhtml' => 'message/rfc822',
170  '.mid' => 'audio/mid',
171  '.midi' => 'audio/mid',
172  '.mod' => 'video/mpeg',
173  '.mov' => 'video/quicktime',
174  '.mp2' => 'video/mpeg',
175  '.mp2v' => 'video/mpeg',
176  '.mp3' => 'audio/mpeg',
177  '.mp4' => 'video/mp4',
178  '.mpa' => 'video/mpeg',
179  '.mpe' => 'video/mpeg',
180  '.mpeg' => 'video/mpeg',
181  '.mpf' => 'application/vnd.ms-mediapackage',
182  '.mpg' => 'video/mpeg',
183  '.mpv2' => 'video/mpeg',
184  '.mqv' => 'video/quicktime',
185  '.NMW' => 'application/nmwb',
186  '.nws' => 'message/rfc822',
187  '.odc' => 'text/x-ms-odc',
188  '.ols' => 'application/vnd.ms-publisher',
189  '.p10' => 'application/pkcs10',
190  '.p12' => 'application/x-pkcs12',
191  '.p7b' => 'application/x-pkcs7-certificates',
192  '.p7c' => 'application/pkcs7-mime',
193  '.p7m' => 'application/pkcs7-mime',
194  '.p7r' => 'application/x-pkcs7-certreqresp',
195  '.p7s' => 'application/pkcs7-signature',
196  '.pct' => 'image/pict',
197  '.pdf' => 'application/pdf',
198  '.pdx' => 'application/vnd.adobe.pdx',
199  '.pfx' => 'application/x-pkcs12',
200  '.pic' => 'image/pict',
201  '.pict' => 'image/pict',
202  '.pinstall' => 'application/x-picasa-detect',
203  '.pko' => 'application/vnd.ms-pki.pko',
204  '.png' => 'image/png',
205  '.pnt' => 'image/x-macpaint',
206  '.pntg' => 'image/x-macpaint',
207  '.pot' => 'application/vnd.ms-powerpoint',
208  '.potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
209  '.potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
210  '.ppa' => 'application/vnd.ms-powerpoint',
211  '.ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
212  '.pps' => 'application/vnd.ms-powerpoint',
213  '.ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
214  '.ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
215  '.ppt' => 'application/vnd.ms-powerpoint',
216  '.pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
217  '.pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
218  '.prf' => 'application/pics-rules',
219  '.ps' => 'application/postscript',
220  '.pub' => 'application/vnd.ms-publisher',
221  '.pwz' => 'application/vnd.ms-powerpoint',
222  '.py' => 'text/plain',
223  '.pyw' => 'text/plain',
224  '.qht' => 'text/x-html-insertion',
225  '.qhtm' => 'text/x-html-insertion',
226  '.qt' => 'video/quicktime',
227  '.qti' => 'image/x-quicktime',
228  '.qtif' => 'image/x-quicktime',
229  '.qtl' => 'application/x-quicktimeplayer',
230  '.rat' => 'application/rat-file',
231  '.rmf' => 'application/vnd.adobe.rmf',
232  '.rmi' => 'audio/mid',
233  '.rqy' => 'text/x-ms-rqy',
234  '.rtf' => 'application/msword',
235  '.sct' => 'text/scriptlet',
236  '.sd2' => 'audio/x-sd2',
237  '.sdp' => 'application/sdp',
238  '.shtml' => 'text/html',
239  '.sit' => 'application/x-stuffit',
240  '.sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
241  '.sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
242  '.slk' => 'application/vnd.ms-excel',
243  '.snd' => 'audio/basic',
244  '.so' => 'application/x-apachemodule',
245  '.sol' => 'text/plain',
246  '.sor' => 'text/plain',
247  '.spc' => 'application/x-pkcs7-certificates',
248  '.spl' => 'application/futuresplash',
249  '.sst' => 'application/vnd.ms-pki.certstore',
250  '.stl' => 'application/vnd.ms-pki.stl',
251  '.swf' => 'application/x-shockwave-flash',
252  '.thmx' => 'application/vnd.ms-officetheme',
253  '.tif' => 'image/tiff',
254  '.tiff' => 'image/tiff',
255  '.txt' => 'text/plain',
256  '.uls' => 'text/iuls',
257  '.vcf' => 'text/x-vcard',
258  '.vdx' => 'application/vnd.ms-visio.viewer',
259  '.vsd' => 'application/vnd.ms-visio.viewer',
260  '.vss' => 'application/vnd.ms-visio.viewer',
261  '.vst' => 'application/vnd.ms-visio.viewer',
262  '.vsx' => 'application/vnd.ms-visio.viewer',
263  '.vtx' => 'application/vnd.ms-visio.viewer',
264  '.wav' => 'audio/wav',
265  '.wax' => 'audio/x-ms-wax',
266  '.wbk' => 'application/msword',
267  '.wdp' => 'image/vnd.ms-photo',
268  '.wiz' => 'application/msword',
269  '.wm' => 'video/x-ms-wm',
270  '.wma' => 'audio/x-ms-wma',
271  '.wmd' => 'application/x-ms-wmd',
272  '.wmv' => 'video/x-ms-wmv',
273  '.wmx' => 'video/x-ms-wmx',
274  '.wmz' => 'application/x-ms-wmz',
275  '.wpl' => 'application/vnd.ms-wpl',
276  '.wsc' => 'text/scriptlet',
277  '.wvx' => 'video/x-ms-wvx',
278  '.xaml' => 'application/xaml+xml',
279  '.xbap' => 'application/x-ms-xbap',
280  '.xdp' => 'application/vnd.adobe.xdp+xml',
281  '.xfdf' => 'application/vnd.adobe.xfdf',
282  '.xht' => 'application/xhtml+xml',
283  '.xhtml' => 'application/xhtml+xml',
284  '.xla' => 'application/vnd.ms-excel',
285  '.xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
286  '.xlk' => 'application/vnd.ms-excel',
287  '.xll' => 'application/vnd.ms-excel',
288  '.xlm' => 'application/vnd.ms-excel',
289  '.xls' => 'application/vnd.ms-excel',
290  '.xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
291  '.xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
292  '.xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
293  '.xlt' => 'application/vnd.ms-excel',
294  '.xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
295  '.xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
296  '.xlw' => 'application/vnd.ms-excel',
297  '.xml' => 'text/xml',
298  '.xps' => 'application/vnd.ms-xpsdocument',
299  '.xsl' => 'text/xml',
300  ];
301 
307  protected $versions = [ 'ie05', 'ie06', 'ie07', 'ie07.strict', 'ie07.nohtml' ];
308 
312  protected $typeTable = [];
313 
314  function __construct() {
315  // Construct versioned type arrays from the base type array plus additions
316  $types = $this->baseTypeTable;
317  foreach ( $this->versions as $version ) {
318  if ( isset( $this->addedTypes[$version] ) ) {
319  foreach ( $this->addedTypes[$version] as $format => $addedTypes ) {
320  $types[$format] = array_merge( $types[$format], $addedTypes );
321  }
322  }
323  $this->typeTable[$version] = $types;
324  }
325  }
326 
337  public function getRealMimesFromData( $fileName, $chunk, $proposed ) {
338  $types = $this->getMimesFromData( $fileName, $chunk, $proposed );
339  $types = array_map( [ $this, 'translateMimeType' ], $types );
340  return $types;
341  }
342 
349  public function translateMimeType( $type ) {
350  static $table = [
351  'image/pjpeg' => 'image/jpeg',
352  'image/x-png' => 'image/png',
353  'image/x-wmf' => 'application/x-msmetafile',
354  'image/bmp' => 'image/x-bmp',
355  'application/x-zip-compressed' => 'application/zip',
356  'application/x-compressed' => 'application/x-compress',
357  'application/x-gzip-compressed' => 'application/x-gzip',
358  'audio/mid' => 'audio/midi',
359  ];
360  if ( isset( $table[$type] ) ) {
361  $type = $table[$type];
362  }
363  return $type;
364  }
365 
375  public function getMimesFromData( $fileName, $chunk, $proposed ) {
376  $types = [];
377  foreach ( $this->versions as $version ) {
378  $types[$version] = $this->getMimeTypeForVersion( $version, $fileName, $chunk, $proposed );
379  }
380  return $types;
381  }
382 
391  protected function getMimeTypeForVersion( $version, $fileName, $chunk, $proposed ) {
392  // Strip text after a semicolon
393  $semiPos = strpos( $proposed, ';' );
394  if ( $semiPos !== false ) {
395  $proposed = substr( $proposed, 0, $semiPos );
396  }
397 
398  $proposedFormat = $this->getDataFormat( $version, $proposed );
399  if ( $proposedFormat == 'unknown'
400  && $proposed != 'multipart/mixed'
401  && $proposed != 'multipart/x-mixed-replace'
402  ) {
403  return $proposed;
404  }
405  if ( strval( $chunk ) === '' ) {
406  return $proposed;
407  }
408 
409  // Truncate chunk at 255 bytes
410  $chunk = substr( $chunk, 0, 255 );
411 
412  // IE does the Check*Headers() calls last, and instead does the following image
413  // type checks by directly looking for the magic numbers. What I do here should
414  // have the same effect since the magic number checks are identical in both cases.
415  $result = $this->sampleData( $version, $chunk );
416  $sampleFound = $result['found'];
417  $counters = $result['counters'];
418  $binaryType = $this->checkBinaryHeaders( $version, $chunk );
419  $textType = $this->checkTextHeaders( $version, $chunk );
420 
421  if ( $proposed == 'text/html' && isset( $sampleFound['html'] ) ) {
422  return 'text/html';
423  }
424  if ( $proposed == 'image/gif' && $binaryType == 'image/gif' ) {
425  return 'image/gif';
426  }
427  if ( ( $proposed == 'image/pjpeg' || $proposed == 'image/jpeg' )
428  && $binaryType == 'image/pjpeg'
429  ) {
430  return $proposed;
431  }
432  // PNG check added in IE 7
433  if ( $version >= 'ie07'
434  && ( $proposed == 'image/x-png' || $proposed == 'image/png' )
435  && $binaryType == 'image/x-png'
436  ) {
437  return $proposed;
438  }
439 
440  // CDF was removed in IE 7 so it won't be in $sampleFound for later versions
441  if ( isset( $sampleFound['cdf'] ) ) {
442  return 'application/x-cdf';
443  }
444 
445  // RSS and Atom were added in IE 7 so they won't be in $sampleFound for
446  // previous versions
447  if ( isset( $sampleFound['rss'] ) ) {
448  return 'application/rss+xml';
449  }
450  if ( isset( $sampleFound['rdf-tag'] )
451  && isset( $sampleFound['rdf-url'] )
452  && isset( $sampleFound['rdf-purl'] )
453  ) {
454  return 'application/rss+xml';
455  }
456  if ( isset( $sampleFound['atom'] ) ) {
457  return 'application/atom+xml';
458  }
459 
460  if ( isset( $sampleFound['xml'] ) ) {
461  // TODO: I'm not sure under what circumstances this flag is enabled
462  if ( strpos( $version, 'strict' ) !== false ) {
463  if ( $proposed == 'text/html' || $proposed == 'text/xml' ) {
464  return 'text/xml';
465  }
466  } else {
467  return 'text/xml';
468  }
469  }
470  if ( isset( $sampleFound['html'] ) ) {
471  // TODO: I'm not sure under what circumstances this flag is enabled
472  if ( strpos( $version, 'nohtml' ) !== false ) {
473  if ( $proposed == 'text/plain' ) {
474  return 'text/html';
475  }
476  } else {
477  return 'text/html';
478  }
479  }
480  if ( isset( $sampleFound['xbm'] ) ) {
481  return 'image/x-bitmap';
482  }
483  if ( isset( $sampleFound['binhex'] ) ) {
484  return 'application/macbinhex40';
485  }
486  if ( isset( $sampleFound['scriptlet'] ) ) {
487  if ( strpos( $version, 'strict' ) !== false ) {
488  if ( $proposed == 'text/plain' || $proposed == 'text/scriptlet' ) {
489  return 'text/scriptlet';
490  }
491  } else {
492  return 'text/scriptlet';
493  }
494  }
495 
496  // Freaky heuristics to determine if the data is text or binary
497  // The heuristic is of course broken for non-ASCII text
498  if ( $counters['ctrl'] != 0 && ( $counters['ff'] + $counters['low'] )
499  < ( $counters['ctrl'] + $counters['high'] ) * 16
500  ) {
501  $kindOfBinary = true;
502  $type = $binaryType ?: $textType;
503  if ( $type === false ) {
504  $type = 'application/octet-stream';
505  }
506  } else {
507  $kindOfBinary = false;
508  $type = $textType ?: $binaryType;
509  if ( $type === false ) {
510  $type = 'text/plain';
511  }
512  }
513 
514  // Check if the output format is ambiguous
515  // This generally means that detection failed, real types aren't ambiguous
516  $detectedFormat = $this->getDataFormat( $version, $type );
517  if ( $detectedFormat != 'ambiguous' ) {
518  return $type;
519  }
520 
521  if ( $proposedFormat != 'ambiguous' ) {
522  // FormatAgreesWithData()
523  if ( $proposedFormat == 'text' && !$kindOfBinary ) {
524  return $proposed;
525  }
526  if ( $proposedFormat == 'binary' && $kindOfBinary ) {
527  return $proposed;
528  }
529  if ( $proposedFormat == 'html' ) {
530  return $proposed;
531  }
532  }
533 
534  // Find a MIME type by searching the registry for the file extension.
535  $dotPos = strrpos( $fileName, '.' );
536  if ( $dotPos === false ) {
537  return $type;
538  }
539  $ext = substr( $fileName, $dotPos );
540  if ( isset( $this->registry[$ext] ) ) {
541  return $this->registry[$ext];
542  }
543 
544  // TODO: If the extension has an application registered to it, IE will return
545  // application/octet-stream. We'll skip that, so we could erroneously
546  // return text/plain or application/x-netcdf where application/octet-stream
547  // would be correct.
548 
549  return $type;
550  }
551 
559  private function checkTextHeaders( $version, $chunk ) {
560  $chunk2 = substr( $chunk, 0, 2 );
561  $chunk4 = substr( $chunk, 0, 4 );
562  $chunk5 = substr( $chunk, 0, 5 );
563  if ( $chunk4 == '%PDF' ) {
564  return 'application/pdf';
565  }
566  if ( $chunk2 == '%!' ) {
567  return 'application/postscript';
568  }
569  if ( $chunk5 == '{\\rtf' ) {
570  return 'text/richtext';
571  }
572  if ( $chunk5 == 'begin' ) {
573  return 'application/base64';
574  }
575  return false;
576  }
577 
585  private function checkBinaryHeaders( $version, $chunk ) {
586  $chunk2 = substr( $chunk, 0, 2 );
587  $chunk3 = substr( $chunk, 0, 3 );
588  $chunk4 = substr( $chunk, 0, 4 );
589  $chunk5 = substr( $chunk, 0, 5 );
590  $chunk5uc = strtoupper( $chunk5 );
591  $chunk8 = substr( $chunk, 0, 8 );
592  if ( $chunk5uc == 'GIF87' || $chunk5uc == 'GIF89' ) {
593  return 'image/gif';
594  }
595  if ( $chunk2 == "\xff\xd8" ) {
596  return 'image/pjpeg'; // actually plain JPEG but this is what IE returns
597  }
598 
599  if ( $chunk2 == 'BM'
600  && substr( $chunk, 6, 2 ) == "\000\000"
601  && substr( $chunk, 8, 2 ) == "\000\000"
602  ) {
603  return 'image/bmp'; // another non-standard MIME
604  }
605  if ( $chunk4 == 'RIFF'
606  && substr( $chunk, 8, 4 ) == 'WAVE'
607  ) {
608  return 'audio/wav';
609  }
610  // These were integer literals in IE
611  // Perhaps the author was not sure what the target endianness was
612  if ( $chunk4 == ".sd\000"
613  || $chunk4 == ".snd"
614  || $chunk4 == "\000ds."
615  || $chunk4 == "dns."
616  ) {
617  return 'audio/basic';
618  }
619  if ( $chunk3 == "MM\000" ) {
620  return 'image/tiff';
621  }
622  if ( $chunk2 == 'MZ' ) {
623  return 'application/x-msdownload';
624  }
625  if ( $chunk8 == "\x89PNG\x0d\x0a\x1a\x0a" ) {
626  return 'image/x-png'; // [sic]
627  }
628  if ( strlen( $chunk ) >= 5 ) {
629  $byte2 = ord( $chunk[2] );
630  $byte4 = ord( $chunk[4] );
631  if ( $byte2 >= 3 && $byte2 <= 31 && $byte4 == 0 && $chunk2 == 'JG' ) {
632  return 'image/x-jg';
633  }
634  }
635  // More endian confusion?
636  if ( $chunk4 == 'MROF' ) {
637  return 'audio/x-aiff';
638  }
639  $chunk4_8 = substr( $chunk, 8, 4 );
640  if ( $chunk4 == 'FORM' && ( $chunk4_8 == 'AIFF' || $chunk4_8 == 'AIFC' ) ) {
641  return 'audio/x-aiff';
642  }
643  if ( $chunk4 == 'RIFF' && $chunk4_8 == 'AVI ' ) {
644  return 'video/avi';
645  }
646  if ( $chunk4 == "\x00\x00\x01\xb3" || $chunk4 == "\x00\x00\x01\xba" ) {
647  return 'video/mpeg';
648  }
649  if ( $chunk4 == "\001\000\000\000"
650  && substr( $chunk, 40, 4 ) == ' EMF'
651  ) {
652  return 'image/x-emf';
653  }
654  if ( $chunk4 == "\xd7\xcd\xc6\x9a" ) {
655  return 'image/x-wmf';
656  }
657  if ( $chunk4 == "\xca\xfe\xba\xbe" ) {
658  return 'application/java';
659  }
660  if ( $chunk2 == 'PK' ) {
661  return 'application/x-zip-compressed';
662  }
663  if ( $chunk2 == "\x1f\x9d" ) {
664  return 'application/x-compressed';
665  }
666  if ( $chunk2 == "\x1f\x8b" ) {
667  return 'application/x-gzip-compressed';
668  }
669  // Skip redundant check for ZIP
670  if ( $chunk5 == "MThd\000" ) {
671  return 'audio/mid';
672  }
673  if ( $chunk4 == '%PDF' ) {
674  return 'application/pdf';
675  }
676  return false;
677  }
678 
686  protected function sampleData( $version, $chunk ) {
687  $found = [];
688  $counters = [
689  'ctrl' => 0,
690  'high' => 0,
691  'low' => 0,
692  'lf' => 0,
693  'cr' => 0,
694  'ff' => 0
695  ];
696  $htmlTags = [
697  'html',
698  'head',
699  'title',
700  'body',
701  'script',
702  'a href',
703  'pre',
704  'img',
705  'plaintext',
706  'table'
707  ];
708  $rdfUrl = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
709  $rdfPurl = 'http://purl.org/rss/1.0/';
710  $xbmMagic1 = '#define';
711  $xbmMagic2 = '_width';
712  $xbmMagic3 = '_bits';
713  $binhexMagic = 'converted with BinHex';
714  $chunkLength = strlen( $chunk );
715 
716  for ( $offset = 0; $offset < $chunkLength; $offset++ ) {
717  $curChar = $chunk[$offset];
718  if ( $curChar == "\x0a" ) {
719  $counters['lf']++;
720  continue;
721  } elseif ( $curChar == "\x0d" ) {
722  $counters['cr']++;
723  continue;
724  } elseif ( $curChar == "\x0c" ) {
725  $counters['ff']++;
726  continue;
727  } elseif ( $curChar == "\t" ) {
728  $counters['low']++;
729  continue;
730  } elseif ( ord( $curChar ) < 32 ) {
731  $counters['ctrl']++;
732  continue;
733  } elseif ( ord( $curChar ) >= 128 ) {
734  $counters['high']++;
735  continue;
736  }
737 
738  $counters['low']++;
739  if ( $curChar == '<' ) {
740  // XML
741  $remainder = substr( $chunk, $offset + 1 );
742  if ( !strncasecmp( $remainder, '?XML', 4 ) ) {
743  $nextChar = substr( $chunk, $offset + 5, 1 );
744  if ( $nextChar == ':' || $nextChar == ' ' || $nextChar == "\t" ) {
745  $found['xml'] = true;
746  }
747  }
748  // Scriptlet (JSP)
749  if ( !strncasecmp( $remainder, 'SCRIPTLET', 9 ) ) {
750  $found['scriptlet'] = true;
751  break;
752  }
753  // HTML
754  foreach ( $htmlTags as $tag ) {
755  if ( !strncasecmp( $remainder, $tag, strlen( $tag ) ) ) {
756  $found['html'] = true;
757  }
758  }
759  // Skip broken check for additional tags (HR etc.)
760 
761  // CHANNEL replaced by RSS, RDF and FEED in IE 7
762  if ( $version < 'ie07' ) {
763  if ( !strncasecmp( $remainder, 'CHANNEL', 7 ) ) {
764  $found['cdf'] = true;
765  }
766  } else {
767  // RSS
768  if ( !strncasecmp( $remainder, 'RSS', 3 ) ) {
769  $found['rss'] = true;
770  break; // return from SampleData
771  }
772  if ( !strncasecmp( $remainder, 'rdf:RDF', 7 ) ) {
773  $found['rdf-tag'] = true;
774  // no break
775  }
776  if ( !strncasecmp( $remainder, 'FEED', 4 ) ) {
777  $found['atom'] = true;
778  break;
779  }
780  }
781  continue;
782  }
783  // Skip broken check for -->
784 
785  // RSS URL checks
786  // For some reason both URLs must appear before it is recognised
787  $remainder = substr( $chunk, $offset );
788  if ( !strncasecmp( $remainder, $rdfUrl, strlen( $rdfUrl ) ) ) {
789  $found['rdf-url'] = true;
790  if ( isset( $found['rdf-tag'] )
791  && isset( $found['rdf-purl'] ) // [sic]
792  ) {
793  break;
794  }
795  continue;
796  }
797 
798  if ( !strncasecmp( $remainder, $rdfPurl, strlen( $rdfPurl ) ) ) {
799  if ( isset( $found['rdf-tag'] )
800  && isset( $found['rdf-url'] ) // [sic]
801  ) {
802  break;
803  }
804  continue;
805  }
806 
807  // XBM checks
808  if ( !strncasecmp( $remainder, $xbmMagic1, strlen( $xbmMagic1 ) ) ) {
809  $found['xbm1'] = true;
810  continue;
811  }
812  if ( $curChar == '_' ) {
813  if ( isset( $found['xbm2'] ) ) {
814  if ( !strncasecmp( $remainder, $xbmMagic3, strlen( $xbmMagic3 ) ) ) {
815  $found['xbm'] = true;
816  break;
817  }
818  } elseif ( isset( $found['xbm1'] ) ) {
819  if ( !strncasecmp( $remainder, $xbmMagic2, strlen( $xbmMagic2 ) ) ) {
820  $found['xbm2'] = true;
821  }
822  }
823  }
824 
825  // BinHex
826  if ( !strncmp( $remainder, $binhexMagic, strlen( $binhexMagic ) ) ) {
827  $found['binhex'] = true;
828  }
829  }
830  return [ 'found' => $found, 'counters' => $counters ];
831  }
832 
838  protected function getDataFormat( $version, $type ) {
839  $types = $this->typeTable[$version];
840  if ( $type == '(null)' || strval( $type ) === '' ) {
841  return 'ambiguous';
842  }
843  foreach ( $types as $format => $list ) {
844  if ( in_array( $type, $list ) ) {
845  return $format;
846  }
847  }
848  return 'unknown';
849  }
850 }
$versions
IE versions which have been analysed to bring you this class, and for which some substantive differen...
getRealMimesFromData( $fileName, $chunk, $proposed)
Get the MIME types from getMimesFromData(), but convert the result from IE&#39;s idiosyncratic private ty...
sampleData( $version, $chunk)
Do heuristic checks on the bulk of the data sample.
$addedTypes
Changes to the type table in later versions of IE.
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImgAuthModifyHeaders':Executed just before a file is streamed to a user via img_auth.php, allowing headers to be modified beforehand. $title:LinkTarget object & $headers:HTTP headers(name=> value, names are case insensitive). Two headers get special handling:If-Modified-Since(value must be a valid HTTP date) and Range(must be of the form "bytes=(\*-\*)") will be honored when streaming the file. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUnknownUser':When a user doesn 't exist locally, this hook is called to give extensions an opportunity to auto-create it. If the auto-creation is successful, return false. $name:User name 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Array with elements of the form "language:title" in the order that they will be output. & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED since 1.28! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
Definition: hooks.txt:1969
$typeTable
Type table with versions expanded.
This class simulates Microsoft Internet Explorer&#39;s terribly broken and insecure MIME type detection a...
getMimesFromData( $fileName, $chunk, $proposed)
Get the untranslated MIME types for all known versions.
getMimeTypeForVersion( $version, $fileName, $chunk, $proposed)
Get the MIME type for a given named version.
$registry
An approximation of the "Content Type" values in HKEY_CLASSES_ROOT in a typical Windows installation...
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
checkTextHeaders( $version, $chunk)
Check for text headers at the start of the chunk Confirmed same in 5 and 7.
$baseTypeTable
Relevant data taken from the type table in IE 5.
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
getDataFormat( $version, $type)
if(!is_readable( $file)) $ext
Definition: router.php:48
checkBinaryHeaders( $version, $chunk)
Check for binary headers at the start of the chunk Confirmed same in 5 and 7.
translateMimeType( $type)
Translate a MIME type from IE&#39;s idiosyncratic private types into more commonly understood type string...