WB 2.08.x

    function mime_content_type($filename) {

    $mime_types = array(

            'txt'	=> 'text/plain',

            'htm'	=> 'text/html',

            'html'	=> 'text/html',

            'php'	=> 'text/html',

            'css'	=> 'text/css',

            'js'	=> 'application/javascript',

            'json'	=> 'application/json',

            'xml'	=> 'application/xml',

            'swf'	=> 'application/x-shockwave-flash',

            'flv'	=> 'video/x-flv',

            // images

            'png'	=> 'image/png',

            'jpe'	=> 'image/jpeg',

            'jpeg'	=> 'image/jpeg',

            'jpg'	=> 'image/jpeg',

            'gif'	=> 'image/gif',

            'bmp'	=> 'image/bmp',

            'ico'	=> 'image/vnd.microsoft.icon',

            'tiff'	=> 'image/tiff',

            'tif'	=> 'image/tiff',

            'svg'	=> 'image/svg+xml',

            'svgz'	=> 'image/svg+xml',

            // archives

            'zip'	=> 'application/zip',

            'rar'	=> 'application/x-rar-compressed',

            'exe'	=> 'application/x-msdownload',

            'msi'	=> 'application/x-msdownload',

            'cab'	=> 'application/vnd.ms-cab-compressed',

            // audio/video

            'mp3'	=> 'audio/mpeg',

            'mp4'	=> 'audio/mpeg',

            'qt'	=> 'video/quicktime',

            'mov'	=> 'video/quicktime',

            // adobe

            'pdf'	=> 'application/pdf',

            'psd'	=> 'image/vnd.adobe.photoshop',

            'ai'	=> 'application/postscript',

            'eps'	=> 'application/postscript',

            'ps'	=> 'application/postscript',

            // ms office

            'doc'	=> 'application/msword',

            'rtf'	=> 'application/rtf',

            'xls'	=> 'application/vnd.ms-excel',

            'ppt'	=> 'application/vnd.ms-powerpoint',

            // open office

            'odt'	=> 'application/vnd.oasis.opendocument.text',

            'ods'	=> 'application/vnd.oasis.opendocument.spreadsheet',

        );

        $temp = explode('.',$filename);

        $ext = strtolower(array_pop($temp));

        if (array_key_exists($ext, $mime_types)) {

            return $mime_types[$ext];

        }

        elseif (function_exists('finfo_open')) {

            $finfo = finfo_open(FILEINFO_MIME);

            $mimetype = finfo_file($finfo, $filename);

            finfo_close($finfo);

            return $mimetype;

        }

        else {

            return 'application/octet-stream';

        }

    }