MediaWiki  REL1_31
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 
315  function __construct() {
316  // Construct versioned type arrays from the base type array plus additions
317  $types = $this->baseTypeTable;
318  foreach ( $this->versions as $version ) {
319  if ( isset( $this->addedTypes[$version] ) ) {
320  foreach ( $this->addedTypes[$version] as $format => $addedTypes ) {
321  $types[$format] = array_merge( $types[$format], $addedTypes );
322  }
323  }
324  $this->typeTable[$version] = $types;
325  }
326  }
327 
338  public function getRealMimesFromData( $fileName, $chunk, $proposed ) {
339  $types = $this->getMimesFromData( $fileName, $chunk, $proposed );
340  $types = array_map( [ $this, 'translateMimeType' ], $types );
341  return $types;
342  }
343 
350  public function translateMimeType( $type ) {
351  static $table = [
352  'image/pjpeg' => 'image/jpeg',
353  'image/x-png' => 'image/png',
354  'image/x-wmf' => 'application/x-msmetafile',
355  'image/bmp' => 'image/x-bmp',
356  'application/x-zip-compressed' => 'application/zip',
357  'application/x-compressed' => 'application/x-compress',
358  'application/x-gzip-compressed' => 'application/x-gzip',
359  'audio/mid' => 'audio/midi',
360  ];
361  if ( isset( $table[$type] ) ) {
362  $type = $table[$type];
363  }
364  return $type;
365  }
366 
376  public function getMimesFromData( $fileName, $chunk, $proposed ) {
377  $types = [];
378  foreach ( $this->versions as $version ) {
379  $types[$version] = $this->getMimeTypeForVersion( $version, $fileName, $chunk, $proposed );
380  }
381  return $types;
382  }
383 
392  protected function getMimeTypeForVersion( $version, $fileName, $chunk, $proposed ) {
393  // Strip text after a semicolon
394  $semiPos = strpos( $proposed, ';' );
395  if ( $semiPos !== false ) {
396  $proposed = substr( $proposed, 0, $semiPos );
397  }
398 
399  $proposedFormat = $this->getDataFormat( $version, $proposed );
400  if ( $proposedFormat == 'unknown'
401  && $proposed != 'multipart/mixed'
402  && $proposed != 'multipart/x-mixed-replace'
403  ) {
404  return $proposed;
405  }
406  if ( strval( $chunk ) === '' ) {
407  return $proposed;
408  }
409 
410  // Truncate chunk at 255 bytes
411  $chunk = substr( $chunk, 0, 255 );
412 
413  // IE does the Check*Headers() calls last, and instead does the following image
414  // type checks by directly looking for the magic numbers. What I do here should
415  // have the same effect since the magic number checks are identical in both cases.
416  $result = $this->sampleData( $version, $chunk );
417  $sampleFound = $result['found'];
418  $counters = $result['counters'];
419  $binaryType = $this->checkBinaryHeaders( $version, $chunk );
420  $textType = $this->checkTextHeaders( $version, $chunk );
421 
422  if ( $proposed == 'text/html' && isset( $sampleFound['html'] ) ) {
423  return 'text/html';
424  }
425  if ( $proposed == 'image/gif' && $binaryType == 'image/gif' ) {
426  return 'image/gif';
427  }
428  if ( ( $proposed == 'image/pjpeg' || $proposed == 'image/jpeg' )
429  && $binaryType == 'image/pjpeg'
430  ) {
431  return $proposed;
432  }
433  // PNG check added in IE 7
434  if ( $version >= 'ie07'
435  && ( $proposed == 'image/x-png' || $proposed == 'image/png' )
436  && $binaryType == 'image/x-png'
437  ) {
438  return $proposed;
439  }
440 
441  // CDF was removed in IE 7 so it won't be in $sampleFound for later versions
442  if ( isset( $sampleFound['cdf'] ) ) {
443  return 'application/x-cdf';
444  }
445 
446  // RSS and Atom were added in IE 7 so they won't be in $sampleFound for
447  // previous versions
448  if ( isset( $sampleFound['rss'] ) ) {
449  return 'application/rss+xml';
450  }
451  if ( isset( $sampleFound['rdf-tag'] )
452  && isset( $sampleFound['rdf-url'] )
453  && isset( $sampleFound['rdf-purl'] )
454  ) {
455  return 'application/rss+xml';
456  }
457  if ( isset( $sampleFound['atom'] ) ) {
458  return 'application/atom+xml';
459  }
460 
461  if ( isset( $sampleFound['xml'] ) ) {
462  // TODO: I'm not sure under what circumstances this flag is enabled
463  if ( strpos( $version, 'strict' ) !== false ) {
464  if ( $proposed == 'text/html' || $proposed == 'text/xml' ) {
465  return 'text/xml';
466  }
467  } else {
468  return 'text/xml';
469  }
470  }
471  if ( isset( $sampleFound['html'] ) ) {
472  // TODO: I'm not sure under what circumstances this flag is enabled
473  if ( strpos( $version, 'nohtml' ) !== false ) {
474  if ( $proposed == 'text/plain' ) {
475  return 'text/html';
476  }
477  } else {
478  return 'text/html';
479  }
480  }
481  if ( isset( $sampleFound['xbm'] ) ) {
482  return 'image/x-bitmap';
483  }
484  if ( isset( $sampleFound['binhex'] ) ) {
485  return 'application/macbinhex40';
486  }
487  if ( isset( $sampleFound['scriptlet'] ) ) {
488  if ( strpos( $version, 'strict' ) !== false ) {
489  if ( $proposed == 'text/plain' || $proposed == 'text/scriptlet' ) {
490  return 'text/scriptlet';
491  }
492  } else {
493  return 'text/scriptlet';
494  }
495  }
496 
497  // Freaky heuristics to determine if the data is text or binary
498  // The heuristic is of course broken for non-ASCII text
499  if ( $counters['ctrl'] != 0 && ( $counters['ff'] + $counters['low'] )
500  < ( $counters['ctrl'] + $counters['high'] ) * 16
501  ) {
502  $kindOfBinary = true;
503  $type = $binaryType ? $binaryType : $textType;
504  if ( $type === false ) {
505  $type = 'application/octet-stream';
506  }
507  } else {
508  $kindOfBinary = false;
509  $type = $textType ? $textType : $binaryType;
510  if ( $type === false ) {
511  $type = 'text/plain';
512  }
513  }
514 
515  // Check if the output format is ambiguous
516  // This generally means that detection failed, real types aren't ambiguous
517  $detectedFormat = $this->getDataFormat( $version, $type );
518  if ( $detectedFormat != 'ambiguous' ) {
519  return $type;
520  }
521 
522  if ( $proposedFormat != 'ambiguous' ) {
523  // FormatAgreesWithData()
524  if ( $proposedFormat == 'text' && !$kindOfBinary ) {
525  return $proposed;
526  }
527  if ( $proposedFormat == 'binary' && $kindOfBinary ) {
528  return $proposed;
529  }
530  if ( $proposedFormat == 'html' ) {
531  return $proposed;
532  }
533  }
534 
535  // Find a MIME type by searching the registry for the file extension.
536  $dotPos = strrpos( $fileName, '.' );
537  if ( $dotPos === false ) {
538  return $type;
539  }
540  $ext = substr( $fileName, $dotPos );
541  if ( isset( $this->registry[$ext] ) ) {
542  return $this->registry[$ext];
543  }
544 
545  // TODO: If the extension has an application registered to it, IE will return
546  // application/octet-stream. We'll skip that, so we could erroneously
547  // return text/plain or application/x-netcdf where application/octet-stream
548  // would be correct.
549 
550  return $type;
551  }
552 
560  private function checkTextHeaders( $version, $chunk ) {
561  $chunk2 = substr( $chunk, 0, 2 );
562  $chunk4 = substr( $chunk, 0, 4 );
563  $chunk5 = substr( $chunk, 0, 5 );
564  if ( $chunk4 == '%PDF' ) {
565  return 'application/pdf';
566  }
567  if ( $chunk2 == '%!' ) {
568  return 'application/postscript';
569  }
570  if ( $chunk5 == '{\\rtf' ) {
571  return 'text/richtext';
572  }
573  if ( $chunk5 == 'begin' ) {
574  return 'application/base64';
575  }
576  return false;
577  }
578 
586  private function checkBinaryHeaders( $version, $chunk ) {
587  $chunk2 = substr( $chunk, 0, 2 );
588  $chunk3 = substr( $chunk, 0, 3 );
589  $chunk4 = substr( $chunk, 0, 4 );
590  $chunk5 = substr( $chunk, 0, 5 );
591  $chunk5uc = strtoupper( $chunk5 );
592  $chunk8 = substr( $chunk, 0, 8 );
593  if ( $chunk5uc == 'GIF87' || $chunk5uc == 'GIF89' ) {
594  return 'image/gif';
595  }
596  if ( $chunk2 == "\xff\xd8" ) {
597  return 'image/pjpeg'; // actually plain JPEG but this is what IE returns
598  }
599 
600  if ( $chunk2 == 'BM'
601  && substr( $chunk, 6, 2 ) == "\000\000"
602  && substr( $chunk, 8, 2 ) == "\000\000"
603  ) {
604  return 'image/bmp'; // another non-standard MIME
605  }
606  if ( $chunk4 == 'RIFF'
607  && substr( $chunk, 8, 4 ) == 'WAVE'
608  ) {
609  return 'audio/wav';
610  }
611  // These were integer literals in IE
612  // Perhaps the author was not sure what the target endianness was
613  if ( $chunk4 == ".sd\000"
614  || $chunk4 == ".snd"
615  || $chunk4 == "\000ds."
616  || $chunk4 == "dns."
617  ) {
618  return 'audio/basic';
619  }
620  if ( $chunk3 == "MM\000" ) {
621  return 'image/tiff';
622  }
623  if ( $chunk2 == 'MZ' ) {
624  return 'application/x-msdownload';
625  }
626  if ( $chunk8 == "\x89PNG\x0d\x0a\x1a\x0a" ) {
627  return 'image/x-png'; // [sic]
628  }
629  if ( strlen( $chunk ) >= 5 ) {
630  $byte2 = ord( $chunk[2] );
631  $byte4 = ord( $chunk[4] );
632  if ( $byte2 >= 3 && $byte2 <= 31 && $byte4 == 0 && $chunk2 == 'JG' ) {
633  return 'image/x-jg';
634  }
635  }
636  // More endian confusion?
637  if ( $chunk4 == 'MROF' ) {
638  return 'audio/x-aiff';
639  }
640  $chunk4_8 = substr( $chunk, 8, 4 );
641  if ( $chunk4 == 'FORM' && ( $chunk4_8 == 'AIFF' || $chunk4_8 == 'AIFC' ) ) {
642  return 'audio/x-aiff';
643  }
644  if ( $chunk4 == 'RIFF' && $chunk4_8 == 'AVI ' ) {
645  return 'video/avi';
646  }
647  if ( $chunk4 == "\x00\x00\x01\xb3" || $chunk4 == "\x00\x00\x01\xba" ) {
648  return 'video/mpeg';
649  }
650  if ( $chunk4 == "\001\000\000\000"
651  && substr( $chunk, 40, 4 ) == ' EMF'
652  ) {
653  return 'image/x-emf';
654  }
655  if ( $chunk4 == "\xd7\xcd\xc6\x9a" ) {
656  return 'image/x-wmf';
657  }
658  if ( $chunk4 == "\xca\xfe\xba\xbe" ) {
659  return 'application/java';
660  }
661  if ( $chunk2 == 'PK' ) {
662  return 'application/x-zip-compressed';
663  }
664  if ( $chunk2 == "\x1f\x9d" ) {
665  return 'application/x-compressed';
666  }
667  if ( $chunk2 == "\x1f\x8b" ) {
668  return 'application/x-gzip-compressed';
669  }
670  // Skip redundant check for ZIP
671  if ( $chunk5 == "MThd\000" ) {
672  return 'audio/mid';
673  }
674  if ( $chunk4 == '%PDF' ) {
675  return 'application/pdf';
676  }
677  return false;
678  }
679 
687  protected function sampleData( $version, $chunk ) {
688  $found = [];
689  $counters = [
690  'ctrl' => 0,
691  'high' => 0,
692  'low' => 0,
693  'lf' => 0,
694  'cr' => 0,
695  'ff' => 0
696  ];
697  $htmlTags = [
698  'html',
699  'head',
700  'title',
701  'body',
702  'script',
703  'a href',
704  'pre',
705  'img',
706  'plaintext',
707  'table'
708  ];
709  $rdfUrl = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
710  $rdfPurl = 'http://purl.org/rss/1.0/';
711  $xbmMagic1 = '#define';
712  $xbmMagic2 = '_width';
713  $xbmMagic3 = '_bits';
714  $binhexMagic = 'converted with BinHex';
715  $chunkLength = strlen( $chunk );
716 
717  for ( $offset = 0; $offset < $chunkLength; $offset++ ) {
718  $curChar = $chunk[$offset];
719  if ( $curChar == "\x0a" ) {
720  $counters['lf']++;
721  continue;
722  } elseif ( $curChar == "\x0d" ) {
723  $counters['cr']++;
724  continue;
725  } elseif ( $curChar == "\x0c" ) {
726  $counters['ff']++;
727  continue;
728  } elseif ( $curChar == "\t" ) {
729  $counters['low']++;
730  continue;
731  } elseif ( ord( $curChar ) < 32 ) {
732  $counters['ctrl']++;
733  continue;
734  } elseif ( ord( $curChar ) >= 128 ) {
735  $counters['high']++;
736  continue;
737  }
738 
739  $counters['low']++;
740  if ( $curChar == '<' ) {
741  // XML
742  $remainder = substr( $chunk, $offset + 1 );
743  if ( !strncasecmp( $remainder, '?XML', 4 ) ) {
744  $nextChar = substr( $chunk, $offset + 5, 1 );
745  if ( $nextChar == ':' || $nextChar == ' ' || $nextChar == "\t" ) {
746  $found['xml'] = true;
747  }
748  }
749  // Scriptlet (JSP)
750  if ( !strncasecmp( $remainder, 'SCRIPTLET', 9 ) ) {
751  $found['scriptlet'] = true;
752  break;
753  }
754  // HTML
755  foreach ( $htmlTags as $tag ) {
756  if ( !strncasecmp( $remainder, $tag, strlen( $tag ) ) ) {
757  $found['html'] = true;
758  }
759  }
760  // Skip broken check for additional tags (HR etc.)
761 
762  // CHANNEL replaced by RSS, RDF and FEED in IE 7
763  if ( $version < 'ie07' ) {
764  if ( !strncasecmp( $remainder, 'CHANNEL', 7 ) ) {
765  $found['cdf'] = true;
766  }
767  } else {
768  // RSS
769  if ( !strncasecmp( $remainder, 'RSS', 3 ) ) {
770  $found['rss'] = true;
771  break; // return from SampleData
772  }
773  if ( !strncasecmp( $remainder, 'rdf:RDF', 7 ) ) {
774  $found['rdf-tag'] = true;
775  // no break
776  }
777  if ( !strncasecmp( $remainder, 'FEED', 4 ) ) {
778  $found['atom'] = true;
779  break;
780  }
781  }
782  continue;
783  }
784  // Skip broken check for -->
785 
786  // RSS URL checks
787  // For some reason both URLs must appear before it is recognised
788  $remainder = substr( $chunk, $offset );
789  if ( !strncasecmp( $remainder, $rdfUrl, strlen( $rdfUrl ) ) ) {
790  $found['rdf-url'] = true;
791  if ( isset( $found['rdf-tag'] )
792  && isset( $found['rdf-purl'] ) // [sic]
793  ) {
794  break;
795  }
796  continue;
797  }
798 
799  if ( !strncasecmp( $remainder, $rdfPurl, strlen( $rdfPurl ) ) ) {
800  if ( isset( $found['rdf-tag'] )
801  && isset( $found['rdf-url'] ) // [sic]
802  ) {
803  break;
804  }
805  continue;
806  }
807 
808  // XBM checks
809  if ( !strncasecmp( $remainder, $xbmMagic1, strlen( $xbmMagic1 ) ) ) {
810  $found['xbm1'] = true;
811  continue;
812  }
813  if ( $curChar == '_' ) {
814  if ( isset( $found['xbm2'] ) ) {
815  if ( !strncasecmp( $remainder, $xbmMagic3, strlen( $xbmMagic3 ) ) ) {
816  $found['xbm'] = true;
817  break;
818  }
819  } elseif ( isset( $found['xbm1'] ) ) {
820  if ( !strncasecmp( $remainder, $xbmMagic2, strlen( $xbmMagic2 ) ) ) {
821  $found['xbm2'] = true;
822  }
823  }
824  }
825 
826  // BinHex
827  if ( !strncmp( $remainder, $binhexMagic, strlen( $binhexMagic ) ) ) {
828  $found['binhex'] = true;
829  }
830  }
831  return [ 'found' => $found, 'counters' => $counters ];
832  }
833 
839  protected function getDataFormat( $version, $type ) {
840  $types = $this->typeTable[$version];
841  if ( $type == '(null)' || strval( $type ) === '' ) {
842  return 'ambiguous';
843  }
844  foreach ( $types as $format => $list ) {
845  if ( in_array( $type, $list ) ) {
846  return $format;
847  }
848  }
849  return 'unknown';
850  }
851 }
IEContentAnalyzer\checkBinaryHeaders
checkBinaryHeaders( $version, $chunk)
Check for binary headers at the start of the chunk Confirmed same in 5 and 7.
Definition: IEContentAnalyzer.php:586
IEContentAnalyzer\sampleData
sampleData( $version, $chunk)
Do heuristic checks on the bulk of the data sample.
Definition: IEContentAnalyzer.php:687
IEContentAnalyzer\$addedTypes
$addedTypes
Changes to the type table in later versions of IE.
Definition: IEContentAnalyzer.php:55
IEContentAnalyzer\getRealMimesFromData
getRealMimesFromData( $fileName, $chunk, $proposed)
Get the MIME types from getMimesFromData(), but convert the result from IE's idiosyncratic private ty...
Definition: IEContentAnalyzer.php:338
$result
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=(\d*-\d*)") 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. 'LanguageGetMagic':DEPRECATED! Use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language & $magicExtensions:associative array of magic words synonyms $lang:language code(string) '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 'LanguageGetSpecialPageAliases':DEPRECATED! Use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language & $specialPageAliases:associative array of magic words synonyms $lang:language code(string) '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! 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:1993
php
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:37
IEContentAnalyzer\$typeTable
$typeTable
Type table with versions expanded.
Definition: IEContentAnalyzer.php:312
IEContentAnalyzer\getMimesFromData
getMimesFromData( $fileName, $chunk, $proposed)
Get the untranslated MIME types for all known versions.
Definition: IEContentAnalyzer.php:376
IEContentAnalyzer\$baseTypeTable
$baseTypeTable
Relevant data taken from the type table in IE 5.
Definition: IEContentAnalyzer.php:31
IEContentAnalyzer\$registry
$registry
An approximation of the "Content Type" values in HKEY_CLASSES_ROOT in a typical Windows installation.
Definition: IEContentAnalyzer.php:67
IEContentAnalyzer\checkTextHeaders
checkTextHeaders( $version, $chunk)
Check for text headers at the start of the chunk Confirmed same in 5 and 7.
Definition: IEContentAnalyzer.php:560
IEContentAnalyzer
This class simulates Microsoft Internet Explorer's terribly broken and insecure MIME type detection a...
Definition: IEContentAnalyzer.php:27
IEContentAnalyzer\getMimeTypeForVersion
getMimeTypeForVersion( $version, $fileName, $chunk, $proposed)
Get the MIME type for a given named version.
Definition: IEContentAnalyzer.php:392
IEContentAnalyzer\translateMimeType
translateMimeType( $type)
Translate a MIME type from IE's idiosyncratic private types into more commonly understood type string...
Definition: IEContentAnalyzer.php:350
IEContentAnalyzer\getDataFormat
getDataFormat( $version, $type)
Definition: IEContentAnalyzer.php:839
as
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:22
$ext
$ext
Definition: router.php:55
IEContentAnalyzer\__construct
__construct()
constructor
Definition: IEContentAnalyzer.php:315
IEContentAnalyzer\$versions
$versions
IE versions which have been analysed to bring you this class, and for which some substantive differen...
Definition: IEContentAnalyzer.php:307
$type
$type
Definition: testCompression.php:48