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337 lines
13 KiB
337 lines
13 KiB
14 years ago
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<?php
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// $Id$
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/**
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*
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* This class inspired by Chris Jean's work, here:
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* http://chrisjean.com/2009/02/14/generating-mime-type-in-php-is-not-magic/
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*
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* It does some MIME trickery, inspired by the need to to deal with Openoffice
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* and MS Office 2007 file formats -- which are often mis-interpreted by
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* mime-magic, fileinfo, and the *nix `file` command.
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*
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* In Drupal 6, we also make use of file_get_mimetype. See:
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* http://api.drupal.org/api/function/file_get_mimetype/6
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* ... however this only provides a uni-directional lookup (ext->mime).
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* While I don't have a specific use case for a mime->extension lookup, I think
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* it's good to have in here.
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*
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* Drupal 7 will have better mime handlers. See:
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* http://api.drupal.org/api/function/file_default_mimetype_mapping/7
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*
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*/
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class MimeClass {
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private $private_mime_types = array(
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/**
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* This is a shortlist of mimetypes which should catch most
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* mimetype<-->extension lookups in the context of Islandora collections.
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*
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* It has been cut from a much longer list.
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*
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* Two types of mimetypes should be put in this list:
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* 1) Special emerging formats which may not yet be expressed in the system
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* mime.types file.
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* 2) Heavily used mimetypes of particular importance to the Islandora
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* project, as lookups against this list will be quicker and less
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* resource intensive than other methods.
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*
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* Lookups are first checked against this short list. If no results are found,
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* then the lookup function may move on to check other sources, namely the
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* system's mime.types file.
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*
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* In most cases though, this short list should suffice.
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*
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* If modifying this list, please note that for promiscuous mimetypes
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* (those which map to multiple extensions, such as text/plain)
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* The function get_extension will always return the *LAST* extension in this list,
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* so you should put your preferred extension *LAST*.
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*
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* e.g...
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* "jpeg" => "image/jpeg",
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* "jpe" => "image/jpeg",
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* "jpg" => "image/jpeg",
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*
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* $this->get_extension('image/jpeg') will always return 'jpg'.
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*
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*/
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// openoffice:
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'odb' => 'application/vnd.oasis.opendocument.database',
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'odc' => 'application/vnd.oasis.opendocument.chart',
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'odf' => 'application/vnd.oasis.opendocument.formula',
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'odg' => 'application/vnd.oasis.opendocument.graphics',
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'odi' => 'application/vnd.oasis.opendocument.image',
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'odm' => 'application/vnd.oasis.opendocument.text-master',
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'odp' => 'application/vnd.oasis.opendocument.presentation',
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'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
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'odt' => 'application/vnd.oasis.opendocument.text',
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'otg' => 'application/vnd.oasis.opendocument.graphics-template',
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'oth' => 'application/vnd.oasis.opendocument.text-web',
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'otp' => 'application/vnd.oasis.opendocument.presentation-template',
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'ots' => 'application/vnd.oasis.opendocument.spreadsheet-template',
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'ott' => 'application/vnd.oasis.opendocument.text-template',
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// staroffice:
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'stc' => 'application/vnd.sun.xml.calc.template',
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'std' => 'application/vnd.sun.xml.draw.template',
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'sti' => 'application/vnd.sun.xml.impress.template',
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'stw' => 'application/vnd.sun.xml.writer.template',
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'sxc' => 'application/vnd.sun.xml.calc',
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'sxd' => 'application/vnd.sun.xml.draw',
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'sxg' => 'application/vnd.sun.xml.writer.global',
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'sxi' => 'application/vnd.sun.xml.impress',
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'sxm' => 'application/vnd.sun.xml.math',
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'sxw' => 'application/vnd.sun.xml.writer',
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// k-office:
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'kil' => 'application/x-killustrator',
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'kpt' => 'application/x-kpresenter',
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'kpr' => 'application/x-kpresenter',
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'ksp' => 'application/x-kspread',
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'kwt' => 'application/x-kword',
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'kwd' => 'application/x-kword',
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// ms office 97:
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'doc' => 'application/msword',
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'xls' => 'application/vnd.ms-excel',
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'ppt' => 'application/vnd.ms-powerpoint',
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// office2007:
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'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
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'docm' => 'application/vnd.ms-word.document.macroEnabled.12',
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'dotx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
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'dotm' => 'application/vnd.ms-word.template.macroEnabled.12',
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'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
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'xlsm' => 'application/vnd.ms-excel.sheet.macroEnabled.12',
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'xltx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
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'xltm' => 'application/vnd.ms-excel.template.macroEnabled.12',
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'xlsb' => 'application/vnd.ms-excel.sheet.binary.macroEnabled.12',
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'xlam' => 'application/vnd.ms-excel.addin.macroEnabled.12',
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'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
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'pptm' => 'application/vnd.ms-powerpoint.presentation.macroEnabled.12',
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'ppsx' => 'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
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'ppsm' => 'application/vnd.ms-powerpoint.slideshow.macroEnabled.12',
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'potx' => 'application/vnd.openxmlformats-officedocument.presentationml.template',
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'potm' => 'application/vnd.ms-powerpoint.template.macroEnabled.12',
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'ppam' => 'application/vnd.ms-powerpoint.addin.macroEnabled.12',
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'sldx' => 'application/vnd.openxmlformats-officedocument.presentationml.slide',
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'sldm' => 'application/vnd.ms-powerpoint.slide.macroEnabled.12',
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// wordperfect (who cares?):
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'wpd' => 'application/wordperfect',
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// common and generic containers:
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'pdf' => 'application/pdf',
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'eps' => 'application/postscript',
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'ps' => 'application/postscript',
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'rtf' => 'text/rtf',
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'rtx' => 'text/richtext',
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'latex' => 'application/x-latex',
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'tex' => 'application/x-tex',
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'texi' => 'application/x-texinfo',
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'texinfo' => 'application/x-texinfo',
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// *ml:
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'css' => 'text/css',
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'htm' => 'text/html',
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'html' => 'text/html',
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'wbxml' => 'application/vnd.wap.wbxml',
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'xht' => 'application/xhtml+xml',
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'xhtml' => 'application/xhtml+xml',
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'xsl' => 'text/xml',
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'xml' => 'text/xml',
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'csv' => 'text/csv',
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'tsv' => 'text/tab-separated-values',
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'txt' => 'text/plain',
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// images:
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"bmp" => "image/bmp",
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"gif" => "image/gif",
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"ief" => "image/ief",
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"jpeg" => "image/jpeg",
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"jpe" => "image/jpeg",
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"jpg" => "image/jpeg",
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"jp2" => "image/jp2",
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"png" => "image/png",
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"tiff" => "image/tiff",
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"tif" => "image/tif",
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"djvu" => "image/vnd.djvu",
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"djv" => "image/vnd.djvu",
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"wbmp" => "image/vnd.wap.wbmp",
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"ras" => "image/x-cmu-raster",
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"pnm" => "image/x-portable-anymap",
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"pbm" => "image/x-portable-bitmap",
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"pgm" => "image/x-portable-graymap",
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"ppm" => "image/x-portable-pixmap",
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"rgb" => "image/x-rgb",
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"xbm" => "image/x-xbitmap",
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"xpm" => "image/x-xpixmap",
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"xwd" => "image/x-windowdump",
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// videos:
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"mpeg" => "video/mpeg",
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"mpe" => "video/mpeg",
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"mpg" => "video/mpeg",
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"qt" => "video/quicktime",
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"mov" => "video/quicktime",
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"mxu" => "video/vnd.mpegurl",
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"avi" => "video/x-msvideo",
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"movie" => "video/x-sgi-movie",
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"flv" => "video/x-flv",
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"swf" => "application/x-shockwave-flash",
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// compressed formats: (note: http://svn.cleancode.org/svn/email/trunk/mime.types)
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"tgz" => "application/x-gzip",
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"gz" => "application/x-gzip",
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"tar" => "application/x-tar",
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"gtar" => "application/x-gtar",
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"zip" => "application/x-zip",
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// others:
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'bin' => 'application/octet-stream',
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);
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private $private_file_extensions;
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private $system_types;
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private $system_exts;
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private $etc_mime_types = '/etc/mime.types';
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public function __construct() {
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// populate the reverse shortlist:
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$this->private_file_extensions = array_flip( $this->private_mime_types );
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// pick up a local mime.types file if it is available
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if (is_readable('mime.types') ) {
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$this->etc_mime_types = 'mime.types';
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}
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}
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/**
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* function: getType
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* description: An alias to get_mimetype,
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* for backwards-compatibility with our old mimetype class.
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*/
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public function getType( $filename ) {
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return $this->get_mimetype( $filename );
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}
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/**
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* function: get_mimetype
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* description: returns a mimetype associated with the file extension of $filename
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*/
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public function get_mimetype( $filename, $debug = FALSE ) {
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$ext = strtolower( array_pop( explode( '.', $filename ) ) );
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if ( ! empty( $this->private_mime_types[$ext] ) ) {
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if ( TRUE === $debug )
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return array( 'mime_type' => $this->private_mime_types[$ext], 'method' => 'from_array' );
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return $this->private_mime_types[$ext];
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}
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if (function_exists('file_get_mimetype')) {
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$drupal_mimetype = file_get_mimetype( $filename );
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if ('application/octet-stream' != $drupal_mimetype) {
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if (TRUE == $debug)
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return array('mime_type' => $drupal_mimetype, 'method' => 'file_get_mimetype');
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return $drupal_mimetype;
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}
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}
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if (!isset( $this->system_types))
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$this->system_types = $this->system_extension_mime_types();
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if (isset( $this->system_types[$ext])) {
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if (TRUE == $debug)
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return array('mime_type' => $this->system_types[$ext], 'method' => 'mime.types');
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return $this->system_types[$ext];
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}
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if ( TRUE === $debug )
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return array( 'mime_type' => 'application/octet-stream', 'method' => 'last_resort' );
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return 'application/octet-stream';
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}
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/**
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* function: get_extension
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* description: returns *one* valid file extension for a given $mime_type
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*/
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public function get_extension( $mime_type, $debug = FALSE ) {
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if (!empty( $this->private_file_extensions[$mime_type])) {
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if (TRUE == $debug)
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return array( 'extension' => $this->private_file_extensions[$mime_type], 'method' => 'from_array' );
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return $this->private_file_extensions[$mime_type];
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}
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if (!isset ( $this->system_exts))
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$this->system_exts = $this->system_mime_type_extensions();
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if (isset( $this->system_exts[$mime_type])) {
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if (TRUE == $debug)
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return array( 'extension' => $this->system_exts[$mime_type], 'method' => 'mime.types' );
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return $this->system_exts[$mime_type];
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}
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if (TRUE == $debug)
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return array( 'extension' => 'bin', 'method' => 'last_resort' );
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return 'bin';
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}
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/**
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* function: system_mime_type_extensions
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* description: populates an internal array of mimetype/extension associations
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* from the system mime.types file, or a local mime.types if one is found (see
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* __constuctor).
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* return: array of mimetype => extension
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*/
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private function system_mime_type_extensions() {
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$out = array();
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$file = fopen($this->etc_mime_types, 'r');
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while (($line = fgets($file)) !== FALSE) {
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$line = trim(preg_replace('/#.*/', '', $line));
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if (!$line)
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continue;
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$parts = preg_split('/\s+/', $line);
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if (count($parts) == 1)
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continue;
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// A single part means a mimetype without extensions, which we ignore.
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$type = array_shift($parts);
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if (!isset($out[$type]))
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$out[$type] = array_shift($parts);
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// We take the first ext from the line if many are present.
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}
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fclose($file);
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return $out;
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}
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/**
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* function: system_mime_type_extensions
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* description: populates an internal array of mimetype/extension associations
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* from the system mime.types file, or a local mime.types if one is found (see
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* __constuctor).
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* return: array of extension => mimetype
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*/
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private function system_extension_mime_types() {
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$out = array();
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$file = fopen($this->etc_mime_types, 'r');
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while (($line = fgets($file)) !== FALSE) {
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$line = trim(preg_replace('/#.*/', '', $line));
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if (!$line)
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continue;
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$parts = preg_split('/\s+/', $line);
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if (count($parts) == 1)
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continue;
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// A single part means a mimetype without extensions, which we ignore.
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$type = array_shift($parts);
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foreach ($parts as $part)
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$out[$part] = $type;
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}
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fclose($file);
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return $out;
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}
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}
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/*
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$helper = new MimeClass();
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print "get_extension('application/x-gzip'): \n";
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echo print_r( $helper->get_extension('application/x-gzip', true), true ) . "\n";
|
||
|
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print "get_extension('text/plain'): \n";
|
||
|
|
echo print_r( $helper->get_extension('text/plain', true), true ) . "\n";
|
||
|
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print "get_mimetype('fucker/asdf.tar.gz'): \n";
|
||
|
|
echo print_r( $helper->get_mimetype('fucker/asdf.tar.gz', true), true ) . "\n";
|
||
|
|
print "get_mimetype('blah.tsp'): \n";
|
||
|
|
echo print_r( $helper->get_mimetype('blah.tsp', true), true ) . "\n";
|
||
|
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/* */
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