<?php
/** Module defining helper functions for detecting and dealing with mime types.
*
- * @package MediaWiki
*/
/** Defines a set of well known mime types
* This is used as a fallback to mime.types files.
- * An extensive list of well known mime types is provided by
+ * An extensive list of well known mime types is provided by
* the file mime.types in the includes directory.
*/
define('MM_WELL_KNOWN_MIME_TYPES',<<<END_STRING
-application/ogg ogg ogm
+application/ogg ogg ogm ogv
application/pdf pdf
+application/vnd.oasis.opendocument.chart odc
+application/vnd.oasis.opendocument.chart-template otc
+application/vnd.oasis.opendocument.formula odf
+application/vnd.oasis.opendocument.formula-template otf
+application/vnd.oasis.opendocument.graphics odg
+application/vnd.oasis.opendocument.graphics-template otg
+application/vnd.oasis.opendocument.image odi
+application/vnd.oasis.opendocument.image-template oti
+application/vnd.oasis.opendocument.presentation odp
+application/vnd.oasis.opendocument.presentation-template otp
+application/vnd.oasis.opendocument.spreadsheet ods
+application/vnd.oasis.opendocument.spreadsheet-template ots
+application/vnd.oasis.opendocument.text odt
+application/vnd.oasis.opendocument.text-template ott
+application/vnd.oasis.opendocument.text-master otm
+application/vnd.oasis.opendocument.text-web oth
application/x-javascript js
application/x-shockwave-flash swf
audio/midi mid midi kar
image/gif gif
image/jpeg jpeg jpg jpe
image/png png
-image/svg+xml svg
+image/svg+xml image/svg svg
image/tiff tiff tif
+image/vnd.djvu image/x.djvu image/x-djvu djvu
+image/x-portable-pixmap ppm
+image/x-xcf xcf
text/plain txt
-text/html html htm
-video/ogg ogm ogg
+text/html html htm
+video/ogg ogm ogg ogv
video/mpeg mpg mpeg
END_STRING
);
/** Defines a set of well known mime info entries
* This is used as a fallback to mime.info files.
- * An extensive list of well known mime types is provided by
+ * An extensive list of well known mime types is provided by
* the file mime.info in the includes directory.
*/
define('MM_WELL_KNOWN_MIME_INFO', <<<END_STRING
application/pdf [OFFICE]
+application/vnd.oasis.opendocument.chart [OFFICE]
+application/vnd.oasis.opendocument.chart-template [OFFICE]
+application/vnd.oasis.opendocument.formula [OFFICE]
+application/vnd.oasis.opendocument.formula-template [OFFICE]
+application/vnd.oasis.opendocument.graphics [OFFICE]
+application/vnd.oasis.opendocument.graphics-template [OFFICE]
+application/vnd.oasis.opendocument.image [OFFICE]
+application/vnd.oasis.opendocument.image-template [OFFICE]
+application/vnd.oasis.opendocument.presentation [OFFICE]
+application/vnd.oasis.opendocument.presentation-template [OFFICE]
+application/vnd.oasis.opendocument.spreadsheet [OFFICE]
+application/vnd.oasis.opendocument.spreadsheet-template [OFFICE]
+application/vnd.oasis.opendocument.text [OFFICE]
+application/vnd.oasis.opendocument.text-template [OFFICE]
+application/vnd.oasis.opendocument.text-master [OFFICE]
+application/vnd.oasis.opendocument.text-web [OFFICE]
text/javascript application/x-javascript [EXECUTABLE]
application/x-shockwave-flash [MULTIMEDIA]
audio/midi [AUDIO]
image/gif [BITMAP]
image/jpeg [BITMAP]
image/png [BITMAP]
-image/svg image/svg+xml [DRAWING]
+image/svg+xml [DRAWING]
image/tiff [BITMAP]
+image/vnd.djvu [BITMAP]
+image/x-xcf [BITMAP]
+image/x-portable-pixmap [BITMAP]
text/plain [TEXT]
text/html [TEXT]
video/ogg [VIDEO]
END_STRING
);
-#note: because this file is possibly included by a function,
+#note: because this file is possibly included by a function,
#we need to access the global scope explicitely!
global $wgLoadFileinfoExtension;
-if ($wgLoadFileinfoExtension) {
+if ($wgLoadFileinfoExtension) {
if(!extension_loaded('fileinfo')) dl('fileinfo.' . PHP_SHLIB_SUFFIX);
}
-/** Implements functions related to mime types such as detection and mapping to
-* file extension,
-*
-* Instances of this class are stateles, there only needs to be one global instance
-* of MimeMagic. Please use wfGetMimeMagic to get that instance.
-* @package MediaWiki
-*/
+/**
+ * Implements functions related to mime types such as detection and mapping to
+ * file extension.
+ *
+ * Instances of this class are stateles, there only needs to be one global instance
+ * of MimeMagic. Please use MimeMagic::singleton() to get that instance.
+ */
class MimeMagic {
-
+
/**
* Mapping of media types to arrays of mime types.
* This is used by findMediaType and getMediaType, respectively
*/
- var $mMediaTypes= NULL;
-
+ var $mMediaTypes= NULL;
+
/** Map of mime type aliases
*/
var $mMimeTypeAliases= NULL;
-
+
/** map of mime types to file extensions (as a space seprarated list)
*/
- var $mMimeToExt= NULL;
-
+ var $mMimeToExt= NULL;
+
/** map of file extensions types to mime types (as a space seprarated list)
*/
- var $mExtToMime= NULL;
-
- /** Initializes the MimeMagic object. This is called by wfGetMimeMagic when instantiation
- * the global MimeMagic singleton object.
+ var $mExtToMime= NULL;
+
+ /** IEContentAnalyzer instance
+ */
+ var $mIEAnalyzer;
+
+ /** The singleton instance
+ */
+ private static $instance;
+
+ /** Initializes the MimeMagic object. This is called by MimeMagic::singleton().
*
* This constructor parses the mime.types and mime.info files and build internal mappings.
*/
- function MimeMagic() {
+ function __construct() {
/*
* --- load mime.types ---
*/
-
- global $wgMimeTypeFile;
-
- $types= MM_WELL_KNOWN_MIME_TYPES;
-
- if ($wgMimeTypeFile) {
- if (is_file($wgMimeTypeFile) and is_readable($wgMimeTypeFile)) {
- wfDebug("MimeMagic::MimeMagic: loading mime types from $wgMimeTypeFile\n");
-
- $types.= "\n";
- $types.= file_get_contents($wgMimeTypeFile);
+
+ global $wgMimeTypeFile, $IP;
+
+ $types = MM_WELL_KNOWN_MIME_TYPES;
+
+ if ( $wgMimeTypeFile == 'includes/mime.types' ) {
+ $wgMimeTypeFile = "$IP/$wgMimeTypeFile";
+ }
+
+ if ( $wgMimeTypeFile ) {
+ if ( is_file( $wgMimeTypeFile ) and is_readable( $wgMimeTypeFile ) ) {
+ wfDebug( __METHOD__.": loading mime types from $wgMimeTypeFile\n" );
+ $types .= "\n";
+ $types .= file_get_contents( $wgMimeTypeFile );
+ } else {
+ wfDebug( __METHOD__.": can't load mime types from $wgMimeTypeFile\n" );
}
- else wfDebug("MimeMagic::MimeMagic: can't load mime types from $wgMimeTypeFile\n");
+ } else {
+ wfDebug( __METHOD__.": no mime types file defined, using build-ins only.\n" );
}
- else wfDebug("MimeMagic::MimeMagic: no mime types file defined, using build-ins only.\n");
-
- $types= str_replace(array("\r\n","\n\r","\n\n","\r\r","\r"),"\n",$types);
- $types= str_replace("\t"," ",$types);
-
- $this->mMimeToExt= array();
- $this->mToMime= array();
-
- $lines= explode("\n",$types);
- foreach ($lines as $s) {
- $s= trim($s);
- if (empty($s)) continue;
- if (strpos($s,'#')===0) continue;
-
- $s= strtolower($s);
- $i= strpos($s,' ');
-
- if ($i===false) continue;
-
+
+ $types = str_replace( array( "\r\n", "\n\r", "\n\n", "\r\r", "\r" ), "\n", $types );
+ $types = str_replace( "\t", " ", $types );
+
+ $this->mMimeToExt = array();
+ $this->mToMime = array();
+
+ $lines = explode( "\n",$types );
+ foreach ( $lines as $s ) {
+ $s = trim( $s );
+ if ( empty( $s ) ) continue;
+ if ( strpos( $s, '#' ) === 0 ) continue;
+
+ $s = strtolower( $s );
+ $i = strpos( $s, ' ' );
+
+ if ( $i === false ) continue;
+
#print "processing MIME line $s<br>";
-
- $mime= substr($s,0,$i);
- $ext= trim(substr($s,$i+1));
-
- if (empty($ext)) continue;
-
- if (@$this->mMimeToExt[$mime]) $this->mMimeToExt[$mime] .= ' '.$ext;
- else $this->mMimeToExt[$mime]= $ext;
-
- $extensions= explode(' ',$ext);
-
- foreach ($extensions as $e) {
- $e= trim($e);
- if (empty($e)) continue;
-
- if (@$this->mExtToMime[$e]) $this->mExtToMime[$e] .= ' '.$mime;
- else $this->mExtToMime[$e]= $mime;
+
+ $mime = substr( $s, 0, $i );
+ $ext = trim( substr($s, $i+1 ) );
+
+ if ( empty( $ext ) ) continue;
+
+ if ( !empty( $this->mMimeToExt[$mime] ) ) {
+ $this->mMimeToExt[$mime] .= ' ' . $ext;
+ } else {
+ $this->mMimeToExt[$mime] = $ext;
+ }
+
+ $extensions = explode( ' ', $ext );
+
+ foreach ( $extensions as $e ) {
+ $e = trim( $e );
+ if ( empty( $e ) ) continue;
+
+ if ( !empty( $this->mExtToMime[$e] ) ) {
+ $this->mExtToMime[$e] .= ' ' . $mime;
+ } else {
+ $this->mExtToMime[$e] = $mime;
+ }
}
}
-
+
/*
* --- load mime.info ---
*/
-
+
global $wgMimeInfoFile;
-
- $info= MM_WELL_KNOWN_MIME_INFO;
-
- if ($wgMimeInfoFile) {
- if (is_file($wgMimeInfoFile) and is_readable($wgMimeInfoFile)) {
- wfDebug("MimeMagic::MimeMagic: loading mime info from $wgMimeInfoFile\n");
-
- $info.= "\n";
- $info.= file_get_contents($wgMimeInfoFile);
+ if ( $wgMimeInfoFile == 'includes/mime.info' ) {
+ $wgMimeInfoFile = "$IP/$wgMimeInfoFile";
+ }
+
+ $info = MM_WELL_KNOWN_MIME_INFO;
+
+ if ( $wgMimeInfoFile ) {
+ if ( is_file( $wgMimeInfoFile ) and is_readable( $wgMimeInfoFile ) ) {
+ wfDebug( __METHOD__.": loading mime info from $wgMimeInfoFile\n" );
+ $info .= "\n";
+ $info .= file_get_contents( $wgMimeInfoFile );
+ } else {
+ wfDebug(__METHOD__.": can't load mime info from $wgMimeInfoFile\n");
}
- else wfDebug("MimeMagic::MimeMagic: can't load mime info from $wgMimeInfoFile\n");
+ } else {
+ wfDebug(__METHOD__.": no mime info file defined, using build-ins only.\n");
}
- else wfDebug("MimeMagic::MimeMagic: no mime info file defined, using build-ins only.\n");
-
- $info= str_replace(array("\r\n","\n\r","\n\n","\r\r","\r"),"\n",$info);
- $info= str_replace("\t"," ",$info);
-
- $this->mMimeTypeAliases= array();
- $this->mMediaTypes= array();
-
- $lines= explode("\n",$info);
- foreach ($lines as $s) {
- $s= trim($s);
- if (empty($s)) continue;
- if (strpos($s,'#')===0) continue;
-
- $s= strtolower($s);
- $i= strpos($s,' ');
-
- if ($i===false) continue;
-
+
+ $info = str_replace( array( "\r\n", "\n\r", "\n\n", "\r\r", "\r" ), "\n", $info);
+ $info = str_replace( "\t", " ", $info );
+
+ $this->mMimeTypeAliases = array();
+ $this->mMediaTypes = array();
+
+ $lines = explode( "\n", $info );
+ foreach ( $lines as $s ) {
+ $s = trim( $s );
+ if ( empty( $s ) ) continue;
+ if ( strpos( $s, '#' ) === 0 ) continue;
+
+ $s = strtolower( $s );
+ $i = strpos( $s, ' ' );
+
+ if ( $i === false ) continue;
+
#print "processing MIME INFO line $s<br>";
-
- $match= array();
- if (preg_match('!\[\s*(\w+)\s*\]!',$s,$match)) {
- $s= preg_replace('!\[\s*(\w+)\s*\]!','',$s);
- $mtype= trim(strtoupper($match[1]));
+
+ $match = array();
+ if ( preg_match( '!\[\s*(\w+)\s*\]!', $s, $match ) ) {
+ $s = preg_replace( '!\[\s*(\w+)\s*\]!', '', $s );
+ $mtype = trim( strtoupper( $match[1] ) );
+ } else {
+ $mtype = MEDIATYPE_UNKNOWN;
}
- else $mtype= MEDIATYPE_UNKNOWN;
-
- $m= explode(' ',$s);
-
- if (!isset($this->mMediaTypes[$mtype])) $this->mMediaTypes[$mtype]= array();
-
- foreach ($m as $mime) {
- $mime= trim($mime);
- if (empty($mime)) continue;
-
- $this->mMediaTypes[$mtype][]= $mime;
+
+ $m = explode( ' ', $s );
+
+ if ( !isset( $this->mMediaTypes[$mtype] ) ) {
+ $this->mMediaTypes[$mtype] = array();
}
-
- if (sizeof($m)>1) {
- $main= $m[0];
- for ($i=1; $i<sizeof($m); $i+= 1) {
- $mime= $m[$i];
- $this->mMimeTypeAliases[$mime]= $main;
+
+ foreach ( $m as $mime ) {
+ $mime = trim( $mime );
+ if ( empty( $mime ) ) continue;
+
+ $this->mMediaTypes[$mtype][] = $mime;
+ }
+
+ if ( sizeof( $m ) > 1 ) {
+ $main = $m[0];
+ for ( $i=1; $i<sizeof($m); $i += 1 ) {
+ $mime = $m[$i];
+ $this->mMimeTypeAliases[$mime] = $main;
}
}
}
-
+
}
-
+
+ /**
+ * Get an instance of this class
+ */
+ static function &singleton() {
+ if ( !isset( self::$instance ) ) {
+ self::$instance = new MimeMagic;
+ }
+ return self::$instance;
+ }
+
/** returns a list of file extensions for a given mime type
* as a space separated string.
*/
- function getExtensionsForType($mime) {
- $mime= strtolower($mime);
-
- $r= @$this->mMimeToExt[$mime];
-
- if (@!$r and isset($this->mMimeTypeAliases[$mime])) {
- $mime= $this->mMimeTypeAliases[$mime];
- $r= @$this->mMimeToExt[$mime];
+ function getExtensionsForType( $mime ) {
+ $mime = strtolower( $mime );
+
+ $r = @$this->mMimeToExt[$mime];
+
+ if ( @!$r and isset( $this->mMimeTypeAliases[$mime] ) ) {
+ $mime = $this->mMimeTypeAliases[$mime];
+ $r = @$this->mMimeToExt[$mime];
}
-
+
return $r;
}
-
+
/** returns a list of mime types for a given file extension
* as a space separated string.
*/
- function getTypesForExtension($ext) {
- $ext= strtolower($ext);
-
- $r= @$this->mExtToMime[$ext];
+ function getTypesForExtension( $ext ) {
+ $ext = strtolower( $ext );
+
+ $r = isset( $this->mExtToMime[$ext] ) ? $this->mExtToMime[$ext] : null;
return $r;
}
-
+
/** returns a single mime type for a given file extension.
* This is always the first type from the list returned by getTypesForExtension($ext).
*/
- function guessTypesForExtension($ext) {
- $m= $this->getTypesForExtension( $ext );
- if( is_null($m) ) return NULL;
-
- $m= trim( $m );
- $m= preg_replace('/\s.*$/','',$m);
-
+ function guessTypesForExtension( $ext ) {
+ $m = $this->getTypesForExtension( $ext );
+ if ( is_null( $m ) ) return NULL;
+
+ $m = trim( $m );
+ $m = preg_replace( '/\s.*$/', '', $m );
+
return $m;
}
-
-
+
+
/** tests if the extension matches the given mime type.
- * returns true if a match was found, NULL if the mime type is unknown,
+ * returns true if a match was found, NULL if the mime type is unknown,
* and false if the mime type is known but no matches where found.
*/
- function isMatchingExtension($extension,$mime) {
- $ext= $this->getExtensionsForType($mime);
-
- if (!$ext) {
+ function isMatchingExtension( $extension, $mime ) {
+ $ext = $this->getExtensionsForType( $mime );
+
+ if ( !$ext ) {
return NULL; //unknown
}
-
- $ext= explode(' ',$ext);
-
- $extension= strtolower($extension);
- if (in_array($extension,$ext)) {
+
+ $ext = explode( ' ', $ext );
+
+ $extension = strtolower( $extension );
+ if ( in_array( $extension, $ext ) ) {
return true;
}
-
+
return false;
}
-
+
/** returns true if the mime type is known to represent
* an image format supported by the PHP GD library.
*/
function isPHPImageType( $mime ) {
#as defined by imagegetsize and image_type_to_mime
- static $types = array(
- 'image/gif', 'image/jpeg', 'image/png',
+ static $types = array(
+ 'image/gif', 'image/jpeg', 'image/png',
'image/x-bmp', 'image/xbm', 'image/tiff',
- 'image/jp2', 'image/jpeg2000', 'image/iff',
+ 'image/jp2', 'image/jpeg2000', 'image/iff',
'image/xbm', 'image/x-xbitmap',
- 'image/vnd.wap.wbmp', 'image/vnd.xiff',
+ 'image/vnd.wap.wbmp', 'image/vnd.xiff',
'image/x-photoshop',
'application/x-shockwave-flash',
- );
-
+ );
+
return in_array( $mime, $types );
}
-
+
/**
* Returns true if the extension represents a type which can
* be reliably detected from its content. Use this to determine
*/
function isRecognizableExtension( $extension ) {
static $types = array(
+ // Types recognized by getimagesize()
'gif', 'jpeg', 'jpg', 'png', 'swf', 'psd',
'bmp', 'tiff', 'tif', 'jpc', 'jp2',
'jpx', 'jb2', 'swc', 'iff', 'wbmp',
- 'xbm'
+ 'xbm',
+
+ // Formats we recognize magic numbers for
+ 'djvu', 'ogg', 'ogv', 'mid', 'pdf', 'wmf', 'xcf',
+
+ // XML formats we sure hope we recognize reliably
+ 'svg',
);
return in_array( strtolower( $extension ), $types );
}
-
-
- /** mime type detection. This uses detectMimeType to detect the mim type of the file,
+
+
+ /** mime type detection. This uses detectMimeType to detect the mime type of the file,
* but applies additional checks to determine some well known file formats that may be missed
* or misinterpreter by the default mime detection (namely xml based formats like XHTML or SVG).
*
* @param string $file The file to check
- * @param bool $useExt switch for allowing to use the file extension to guess the mime type. true by default.
+ * @param mixed $ext The file extension, or true to extract it from the filename.
+ * Set it to false to ignore the extension.
*
* @return string the mime type of $file
*/
- function guessMimeType( $file, $useExt=true ) {
- $fname = 'MimeMagic::guessMimeType';
- $mime= $this->detectMimeType($file,$useExt);
-
+ function guessMimeType( $file, $ext = true ) {
+ $mime = $this->doGuessMimeType( $file, $ext );
+
+ if( !$mime ) {
+ wfDebug( __METHOD__.": internal type detection failed for $file (.$ext)...\n" );
+ $mime = $this->detectMimeType( $file, $ext );
+ }
+
+ if ( isset( $this->mMimeTypeAliases[$mime] ) ) {
+ $mime = $this->mMimeTypeAliases[$mime];
+ }
+
+ wfDebug(__METHOD__.": final mime type of $file: $mime\n");
+ return $mime;
+ }
+
+ function doGuessMimeType( $file, $ext = true ) {
// Read a chunk of the file
+ wfSuppressWarnings();
$f = fopen( $file, "rt" );
+ wfRestoreWarnings();
if( !$f ) return "unknown/unknown";
$head = fread( $f, 1024 );
+ fseek( $f, -65558, SEEK_END );
+ $tail = fread( $f, 65558 ); // 65558 = maximum size of a zip EOCDR
fclose( $f );
-
- $sub4 = substr( $head, 0, 4 );
- if ( $sub4 == "\x01\x00\x09\x00" || $sub4 == "\xd7\xcd\xc6\x9a" ) {
- // WMF kill kill kill
+
+ // Hardcode a few magic number checks...
+ $headers = array(
+ // Multimedia...
+ 'MThd' => 'audio/midi',
+ 'OggS' => 'application/ogg',
+
+ // Image formats...
// Note that WMF may have a bare header, no magic number.
- // The former of the above two checks is theoretically prone to false positives
- $mime = "application/x-msmetafile";
+ "\x01\x00\x09\x00" => 'application/x-msmetafile', // Possibly prone to false positives?
+ "\xd7\xcd\xc6\x9a" => 'application/x-msmetafile',
+ '%PDF' => 'application/pdf',
+ 'gimp xcf' => 'image/x-xcf',
+
+ // Some forbidden fruit...
+ 'MZ' => 'application/octet-stream', // DOS/Windows executable
+ "\xca\xfe\xba\xbe" => 'application/octet-stream', // Mach-O binary
+ "\x7fELF" => 'application/octet-stream', // ELF binary
+ );
+
+ foreach( $headers as $magic => $candidate ) {
+ if( strncmp( $head, $magic, strlen( $magic ) ) == 0 ) {
+ wfDebug( __METHOD__ . ": magic header in $file recognized as $candidate\n" );
+ return $candidate;
+ }
}
-
- if (strpos($mime,"text/")===0 || $mime==="application/xml") {
-
- $xml_type= NULL;
- $script_type= NULL;
-
- /*
- * look for XML formats (XHTML and SVG)
- */
- if ($mime==="text/sgml" ||
- $mime==="text/plain" ||
- $mime==="text/html" ||
- $mime==="text/xml" ||
- $mime==="application/xml") {
-
- if (substr($head,0,5)=="<?xml") $xml_type= "ASCII";
- elseif (substr($head,0,8)=="\xef\xbb\xbf<?xml") $xml_type= "UTF-8";
- elseif (substr($head,0,10)=="\xfe\xff\x00<\x00?\x00x\x00m\x00l") $xml_type= "UTF-16BE";
- elseif (substr($head,0,10)=="\xff\xfe<\x00?\x00x\x00m\x00l\x00") $xml_type= "UTF-16LE";
-
- if ($xml_type) {
- if ($xml_type!=="UTF-8" && $xml_type!=="ASCII") $head= iconv($xml_type,"ASCII//IGNORE",$head);
-
- $match= array();
- $doctype= "";
- $tag= "";
-
- if (preg_match('%<!DOCTYPE\s+[\w-]+\s+PUBLIC\s+["'."'".'"](.*?)["'."'".'"].*>%sim',$head,$match)) $doctype= $match[1];
- if (preg_match('%<(\w+).*>%sim',$head,$match)) $tag= $match[1];
-
- #print "<br>ANALYSING $file ($mime): doctype= $doctype; tag= $tag<br>";
-
- if (strpos($doctype,"-//W3C//DTD SVG")===0) $mime= "image/svg";
- elseif ($tag==="svg") $mime= "image/svg";
- elseif (strpos($doctype,"-//W3C//DTD XHTML")===0) $mime= "text/html";
- elseif ($tag==="html") $mime= "text/html";
-
- $test_more= false;
- }
+
+ /*
+ * look for PHP
+ * Check for this before HTML/XML...
+ * Warning: this is a heuristic, and won't match a file with a lot of non-PHP before.
+ * It will also match text files which could be PHP. :)
+ */
+ if( ( strpos( $head, '<?php' ) !== false ) ||
+ ( strpos( $head, '<? ' ) !== false ) ||
+ ( strpos( $head, "<?\n" ) !== false ) ||
+ ( strpos( $head, "<?\t" ) !== false ) ||
+ ( strpos( $head, "<?=" ) !== false ) ||
+
+ ( strpos( $head, "<\x00?\x00p\x00h\x00p" ) !== false ) ||
+ ( strpos( $head, "<\x00?\x00 " ) !== false ) ||
+ ( strpos( $head, "<\x00?\x00\n" ) !== false ) ||
+ ( strpos( $head, "<\x00?\x00\t" ) !== false ) ||
+ ( strpos( $head, "<\x00?\x00=" ) !== false ) ) {
+
+ wfDebug( __METHOD__ . ": recognized $file as application/x-php\n" );
+ return "application/x-php";
+ }
+
+ /*
+ * look for XML formats (XHTML and SVG)
+ */
+ $xml = new XmlTypeCheck( $file );
+ if( $xml->wellFormed ) {
+ global $wgXMLMimeTypes;
+ if( isset( $wgXMLMimeTypes[$xml->getRootElement()] ) ) {
+ return $wgXMLMimeTypes[$xml->getRootElement()];
+ } else {
+ return 'application/xml';
}
-
- /*
- * look for shell scripts
- */
- if (!$xml_type) {
- $script_type= NULL;
-
- #detect by shebang
- if (substr($head,0,2)=="#!") $script_type= "ASCII";
- elseif (substr($head,0,5)=="\xef\xbb\xbf#!") $script_type= "UTF-8";
- elseif (substr($head,0,7)=="\xfe\xff\x00#\x00!") $script_type= "UTF-16BE";
- elseif (substr($head,0,7)=="\xff\xfe#\x00!") $script_type= "UTF-16LE";
-
- if ($script_type) {
- if ($script_type!=="UTF-8" && $script_type!=="ASCII") $head= iconv($script_type,"ASCII//IGNORE",$head);
-
- $match= array();
- $prog= "";
-
- if (preg_match('%/?([^\s]+/)(w+)%sim',$head,$match)) $script= $match[2];
-
- $mime= "application/x-$prog";
+ }
+
+ /*
+ * look for shell scripts
+ */
+ $script_type = NULL;
+
+ # detect by shebang
+ if ( substr( $head, 0, 2) == "#!" ) {
+ $script_type = "ASCII";
+ } elseif ( substr( $head, 0, 5) == "\xef\xbb\xbf#!" ) {
+ $script_type = "UTF-8";
+ } elseif ( substr( $head, 0, 7) == "\xfe\xff\x00#\x00!" ) {
+ $script_type = "UTF-16BE";
+ } elseif ( substr( $head, 0, 7 ) == "\xff\xfe#\x00!" ) {
+ $script_type= "UTF-16LE";
+ }
+
+ if ( $script_type ) {
+ if ( $script_type !== "UTF-8" && $script_type !== "ASCII") {
+ // Quick and dirty fold down to ASCII!
+ $pack = array( 'UTF-16BE' => 'n*', 'UTF-16LE' => 'v*' );
+ $chars = unpack( $pack[$script_type], substr( $head, 2 ) );
+ $head = '';
+ foreach( $chars as $codepoint ) {
+ if( $codepoint < 128 ) {
+ $head .= chr( $codepoint );
+ } else {
+ $head .= '?';
+ }
}
}
-
- /*
- * look for PHP
- */
- if( !$xml_type && !$script_type ) {
-
- if( ( strpos( $head, '<?php' ) !== false ) ||
- ( strpos( $head, '<? ' ) !== false ) ||
- ( strpos( $head, "<?\n" ) !== false ) ||
- ( strpos( $head, "<?\t" ) !== false ) ||
- ( strpos( $head, "<?=" ) !== false ) ||
-
- ( strpos( $head, "<\x00?\x00p\x00h\x00p" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00 " ) !== false ) ||
- ( strpos( $head, "<\x00?\x00\n" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00\t" ) !== false ) ||
- ( strpos( $head, "<\x00?\x00=" ) !== false ) ) {
-
- $mime= "application/x-php";
- }
+
+ $match = array();
+
+ if ( preg_match( '%/?([^\s]+/)(\w+)%', $head, $match ) ) {
+ $mime = "application/x-{$match[2]}";
+ wfDebug( __METHOD__.": shell script recognized as $mime\n" );
+ return $mime;
}
-
}
-
- if (isset($this->mMimeTypeAliases[$mime])) $mime= $this->mMimeTypeAliases[$mime];
-
- wfDebug("$fname: final mime type of $file: $mime\n");
- return $mime;
+
+ // Check for ZIP (before getimagesize)
+ if ( strpos( $tail, "PK\x05\x06" ) !== false ) {
+ wfDebug( __METHOD__.": ZIP header present at end of $file\n" );
+ return $this->detectZipType( $head );
+ }
+
+ wfSuppressWarnings();
+ $gis = getimagesize( $file );
+ wfRestoreWarnings();
+
+ if( $gis && isset( $gis['mime'] ) ) {
+ $mime = $gis['mime'];
+ wfDebug( __METHOD__.": getimagesize detected $file as $mime\n" );
+ return $mime;
+ }
+
+ // Also test DjVu
+ $deja = new DjVuImage( $file );
+ if( $deja->isValid() ) {
+ wfDebug( __METHOD__.": detected $file as image/vnd.djvu\n" );
+ return 'image/vnd.djvu';
+ }
+
+ return false;
}
- /** Internal mime type detection, please use guessMimeType() for application code instead.
+ /**
+ * Detect application-specific file type of a given ZIP file from its
+ * header data. Currently works for OpenDocument types...
+ * If can't tell, returns 'application/zip'.
+ *
+ * @param string $header Some reasonably-sized chunk of file header
+ * @return string
+ */
+ function detectZipType( $header ) {
+ $opendocTypes = array(
+ 'chart',
+ 'chart-template',
+ 'formula',
+ 'formula-template',
+ 'graphics',
+ 'graphics-template',
+ 'image',
+ 'image-template',
+ 'presentation',
+ 'presentation-template',
+ 'spreadsheet',
+ 'spreadsheet-template',
+ 'text',
+ 'text-template',
+ 'text-master',
+ 'text-web' );
+
+ // http://lists.oasis-open.org/archives/office/200505/msg00006.html
+ $types = '(?:' . implode( '|', $opendocTypes ) . ')';
+ $opendocRegex = "/^mimetype(application\/vnd\.oasis\.opendocument\.$types)/";
+ wfDebug( __METHOD__.": $opendocRegex\n" );
+
+ if( preg_match( $opendocRegex, substr( $header, 30 ), $matches ) ) {
+ $mime = $matches[1];
+ wfDebug( __METHOD__.": detected $mime from ZIP archive\n" );
+ return $mime;
+ } else {
+ wfDebug( __METHOD__.": unable to identify type of ZIP archive\n" );
+ return 'application/zip';
+ }
+ }
+
+ /** Internal mime type detection, please use guessMimeType() for application code instead.
* Detection is done using an external program, if $wgMimeDetectorCommand is set.
- * Otherwise, the fileinfo extension and mime_content_type are tried (in this order), if they are available.
- * If the dections fails and $useExt is true, the mime type is guessed from the file extension, using guessTypesForExtension.
+ * Otherwise, the fileinfo extension and mime_content_type are tried (in this order), if they are available.
+ * If the dections fails and $ext is not false, the mime type is guessed from the file extension, using
+ * guessTypesForExtension.
* If the mime type is still unknown, getimagesize is used to detect the mime type if the file is an image.
* If no mime type can be determined, this function returns "unknown/unknown".
*
* @param string $file The file to check
- * @param bool $useExt switch for allowing to use the file extension to guess the mime type. true by default.
+ * @param mixed $ext The file extension, or true to extract it from the filename.
+ * Set it to false to ignore the extension.
*
* @return string the mime type of $file
- * @private
+ * @access private
*/
- function detectMimeType( $file, $useExt=true ) {
- $fname = 'MimeMagic::detectMimeType';
-
+ function detectMimeType( $file, $ext = true ) {
global $wgMimeDetectorCommand;
-
- $m= NULL;
- if ($wgMimeDetectorCommand) {
- $fn= wfEscapeShellArg($file);
- $m= `$wgMimeDetectorCommand $fn`;
- }
- else if (function_exists("finfo_open") && function_exists("finfo_file")) {
-
+
+ $m = NULL;
+ if ( $wgMimeDetectorCommand ) {
+ $fn = wfEscapeShellArg( $file );
+ $m = `$wgMimeDetectorCommand $fn`;
+ } elseif ( function_exists( "finfo_open" ) && function_exists( "finfo_file" ) ) {
+
# This required the fileinfo extension by PECL,
# see http://pecl.php.net/package/fileinfo
# This must be compiled into PHP
#
- # finfo is the official replacement for the deprecated
+ # finfo is the official replacement for the deprecated
# mime_content_type function, see below.
#
# If you may need to load the fileinfo extension at runtime, set
# $wgLoadFileinfoExtension in LocalSettings.php
-
+
$mime_magic_resource = finfo_open(FILEINFO_MIME); /* return mime type ala mimetype extension */
-
+
if ($mime_magic_resource) {
- $m= finfo_file($mime_magic_resource, $file);
-
- finfo_close($mime_magic_resource);
+ $m = finfo_file( $mime_magic_resource, $file );
+ finfo_close( $mime_magic_resource );
+ } else {
+ wfDebug( __METHOD__.": finfo_open failed on ".FILEINFO_MIME."!\n" );
}
- else wfDebug("$fname: finfo_open failed on ".FILEINFO_MIME."!\n");
- }
- else if (function_exists("mime_content_type")) {
-
+ } elseif ( function_exists( "mime_content_type" ) ) {
+
# NOTE: this function is available since PHP 4.3.0, but only if
# PHP was compiled with --with-mime-magic or, before 4.3.2, with --enable-mime-magic.
#
- # On Winodws, you must set mime_magic.magicfile in php.ini to point to the mime.magic file bundeled with PHP;
+ # On Windows, you must set mime_magic.magicfile in php.ini to point to the mime.magic file bundeled with PHP;
# sometimes, this may even be needed under linus/unix.
#
# Also note that this has been DEPRECATED in favor of the fileinfo extension by PECL, see above.
# see http://www.php.net/manual/en/ref.mime-magic.php for details.
-
- $m= mime_content_type($file);
- }
- else wfDebug("$fname: no magic mime detector found!\n");
-
- if ($m) {
- #normalize
- $m= preg_replace('![;, ].*$!','',$m); #strip charset, etc
- $m= trim($m);
- $m= strtolower($m);
-
- if (strpos($m,'unknown')!==false) $m= NULL;
- else {
- wfDebug("$fname: magic mime type of $file: $m\n");
- return $m;
- }
+
+ $m = mime_content_type($file);
+ } else {
+ wfDebug( __METHOD__.": no magic mime detector found!\n" );
}
-
- #if still not known, use getimagesize to find out the type of image
- #TODO: skip things that do not have a well-known image extension? Would that be safe?
- wfSuppressWarnings();
- $gis = getimagesize( $file );
- wfRestoreWarnings();
-
- $notAnImage= false;
-
- if ($gis && is_array($gis) && $gis[2]) {
- switch ($gis[2]) {
- case IMAGETYPE_GIF: $m= "image/gif"; break;
- case IMAGETYPE_JPEG: $m= "image/jpeg"; break;
- case IMAGETYPE_PNG: $m= "image/png"; break;
- case IMAGETYPE_SWF: $m= "application/x-shockwave-flash"; break;
- case IMAGETYPE_PSD: $m= "application/photoshop"; break;
- case IMAGETYPE_BMP: $m= "image/bmp"; break;
- case IMAGETYPE_TIFF_II: $m= "image/tiff"; break;
- case IMAGETYPE_TIFF_MM: $m= "image/tiff"; break;
- case IMAGETYPE_JPC: $m= "image"; break;
- case IMAGETYPE_JP2: $m= "image/jpeg2000"; break;
- case IMAGETYPE_JPX: $m= "image/jpeg2000"; break;
- case IMAGETYPE_JB2: $m= "image"; break;
- case IMAGETYPE_SWC: $m= "application/x-shockwave-flash"; break;
- case IMAGETYPE_IFF: $m= "image/vnd.xiff"; break;
- case IMAGETYPE_WBMP: $m= "image/vnd.wap.wbmp"; break;
- case IMAGETYPE_XBM: $m= "image/x-xbitmap"; break;
- }
-
- if ($m) {
- wfDebug("$fname: image mime type of $file: $m\n");
+
+ if ( $m ) {
+ # normalize
+ $m = preg_replace( '![;, ].*$!', '', $m ); #strip charset, etc
+ $m = trim( $m );
+ $m = strtolower( $m );
+
+ if ( strpos( $m, 'unknown' ) !== false ) {
+ $m = NULL;
+ } else {
+ wfDebug( __METHOD__.": magic mime type of $file: $m\n" );
return $m;
}
- else $notAnImage= true;
}
-
- #if desired, look at extension as a fallback.
- if ($useExt) {
+
+ # if desired, look at extension as a fallback.
+ if ( $ext === true ) {
$i = strrpos( $file, '.' );
- $e= strtolower( $i ? substr( $file, $i + 1 ) : '' );
-
- $m= $this->guessTypesForExtension($e);
-
- #TODO: if $notAnImage is set, do not trust the file extension if
- # the results is one of the image types that should have been recognized
- # by getimagesize
-
- if ($m) {
- wfDebug("$fname: extension mime type of $file: $m\n");
- return $m;
+ $ext = strtolower( $i ? substr( $file, $i + 1 ) : '' );
+ }
+ if ( $ext ) {
+ if( $this->isRecognizableExtension( $ext ) ) {
+ wfDebug( __METHOD__. ": refusing to guess mime type for .$ext file, we should have recognized it\n" );
+ } else {
+ $m = $this->guessTypesForExtension( $ext );
+ if ( $m ) {
+ wfDebug( __METHOD__.": extension mime type of $file: $m\n" );
+ return $m;
+ }
}
}
-
- #unknown type
- wfDebug("$fname: failed to guess mime type for $file!\n");
+
+ #unknown type
+ wfDebug( __METHOD__.": failed to guess mime type for $file!\n" );
return "unknown/unknown";
}
-
+
/**
* Determine the media type code for a file, using its mime type, name and possibly
* its contents.
*
- * This function relies on the findMediaType(), mapping extensions and mime
+ * This function relies on the findMediaType(), mapping extensions and mime
* types to media types.
*
- * @todo analyse file if need be
+ * @todo analyse file if need be
* @todo look at multiple extension, separately and together.
*
- * @param string $path full path to the image file, in case we have to look at the contents
+ * @param string $path full path to the image file, in case we have to look at the contents
* (if null, only the mime type is used to determine the media type code).
* @param string $mime mime type. If null it will be guessed using guessMimeType.
- *
+ *
* @return (int?string?) a value to be used with the MEDIATYPE_xxx constants.
*/
- function getMediaType($path=NULL,$mime=NULL) {
+ function getMediaType( $path = NULL, $mime = NULL ) {
if( !$mime && !$path ) return MEDIATYPE_UNKNOWN;
-
- #if mime type is unknown, guess it
- if( !$mime ) $mime= $this->guessMimeType($path,false);
- #special code for ogg - detect if it's video (theora),
- #else label it as sound.
- if( $mime=="application/ogg" && file_exists($path) ) {
-
+ # If mime type is unknown, guess it
+ if( !$mime ) $mime = $this->guessMimeType( $path, false );
+
+ # Special code for ogg - detect if it's video (theora),
+ # else label it as sound.
+ if( $mime == "application/ogg" && file_exists( $path ) ) {
+
// Read a chunk of the file
$f = fopen( $path, "rt" );
- if( !$f ) return MEDIATYPE_UNKNOWN;
+ if ( !$f ) return MEDIATYPE_UNKNOWN;
$head = fread( $f, 256 );
fclose( $f );
-
- $head= strtolower( $head );
-
- #This is an UGLY HACK, file should be parsed correctly
- if( strpos($head,'theora')!==false ) return MEDIATYPE_VIDEO;
- elseif( strpos($head,'vorbis')!==false ) return MEDIATYPE_AUDIO;
- elseif( strpos($head,'flac')!==false ) return MEDIATYPE_AUDIO;
- elseif( strpos($head,'speex')!==false ) return MEDIATYPE_AUDIO;
+
+ $head = strtolower( $head );
+
+ # This is an UGLY HACK, file should be parsed correctly
+ if ( strpos( $head, 'theora' ) !== false ) return MEDIATYPE_VIDEO;
+ elseif ( strpos( $head, 'vorbis' ) !== false ) return MEDIATYPE_AUDIO;
+ elseif ( strpos( $head, 'flac' ) !== false ) return MEDIATYPE_AUDIO;
+ elseif ( strpos( $head, 'speex' ) !== false ) return MEDIATYPE_AUDIO;
else return MEDIATYPE_MULTIMEDIA;
- }
-
- #check for entry for full mime type
+ }
+
+ # check for entry for full mime type
if( $mime ) {
- $type= $this->findMediaType($mime);
- if( $type!==MEDIATYPE_UNKNOWN ) return $type;
+ $type = $this->findMediaType( $mime );
+ if( $type !== MEDIATYPE_UNKNOWN ) return $type;
}
-
- #check for entry for file extension
- $e= NULL;
- if( $path ) {
+
+ # Check for entry for file extension
+ $e = NULL;
+ if ( $path ) {
$i = strrpos( $path, '.' );
- $e= strtolower( $i ? substr( $path, $i + 1 ) : '' );
-
- #TODO: look at multi-extension if this fails, parse from full path
-
- $type= $this->findMediaType('.'.$e);
- if( $type!==MEDIATYPE_UNKNOWN ) return $type;
+ $e = strtolower( $i ? substr( $path, $i + 1 ) : '' );
+
+ # TODO: look at multi-extension if this fails, parse from full path
+
+ $type = $this->findMediaType( '.' . $e );
+ if ( $type !== MEDIATYPE_UNKNOWN ) return $type;
}
-
- #check major mime type
+
+ # Check major mime type
if( $mime ) {
- $i= strpos($mime,'/');
+ $i = strpos( $mime, '/' );
if( $i !== false ) {
- $major= substr($mime,0,$i);
- $type= $this->findMediaType($major);
- if( $type!==MEDIATYPE_UNKNOWN ) return $type;
+ $major = substr( $mime, 0, $i );
+ $type = $this->findMediaType( $major );
+ if( $type !== MEDIATYPE_UNKNOWN ) return $type;
}
}
-
- if( !$type ) $type= MEDIATYPE_UNKNOWN;
-
+
+ if( !$type ) $type = MEDIATYPE_UNKNOWN;
+
return $type;
}
-
+
/** returns a media code matching the given mime type or file extension.
- * File extensions are represented by a string starting with a dot (.) to
+ * File extensions are represented by a string starting with a dot (.) to
* distinguish them from mime types.
*
* This funktion relies on the mapping defined by $this->mMediaTypes
- * @private
+ * @access private
*/
- function findMediaType($extMime) {
-
- if (strpos($extMime,'.')===0) { #if it's an extension, look up the mime types
- $m= $this->getTypesForExtension(substr($extMime,1));
- if (!$m) return MEDIATYPE_UNKNOWN;
-
- $m= explode(' ',$m);
- }
- else { #normalize mime type
- if (isset($this->mMimeTypeAliases[$extMime])) {
- $extMime= $this->mMimeTypeAliases[$extMime];
+ function findMediaType( $extMime ) {
+ if ( strpos( $extMime, '.' ) === 0 ) { #if it's an extension, look up the mime types
+ $m = $this->getTypesForExtension( substr( $extMime, 1 ) );
+ if ( !$m ) return MEDIATYPE_UNKNOWN;
+
+ $m = explode( ' ', $m );
+ } else {
+ # Normalize mime type
+ if ( isset( $this->mMimeTypeAliases[$extMime] ) ) {
+ $extMime = $this->mMimeTypeAliases[$extMime];
}
-
- $m= array($extMime);
+
+ $m = array($extMime);
}
-
- foreach ($m as $mime) {
- foreach ($this->mMediaTypes as $type => $codes) {
- if (in_array($mime,$codes,true)) return $type;
+
+ foreach ( $m as $mime ) {
+ foreach ( $this->mMediaTypes as $type => $codes ) {
+ if ( in_array($mime, $codes, true ) ) {
+ return $type;
+ }
}
}
-
+
return MEDIATYPE_UNKNOWN;
}
-}
-?>
+ /**
+ * Get the MIME types that various versions of Internet Explorer would
+ * detect from a chunk of the content.
+ *
+ * @param string $fileName The file name (unused at present)
+ * @param string $chunk The first 256 bytes of the file
+ * @param string $proposed The MIME type proposed by the server
+ */
+ public function getIEMimeTypes( $fileName, $chunk, $proposed ) {
+ $ca = $this->getIEContentAnalyzer();
+ return $ca->getRealMimesFromData( $fileName, $chunk, $proposed );
+ }
+
+ /**
+ * Get a cached instance of IEContentAnalyzer
+ */
+ protected function getIEContentAnalyzer() {
+ if ( is_null( $this->mIEAnalyzer ) ) {
+ $this->mIEAnalyzer = new IEContentAnalyzer;
+ }
+ return $this->mIEAnalyzer;
+ }
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff