123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876 |
- <?php
-
- /**
- +-----------------------------------------------------------------------+
- | This file is part of the Roundcube Webmail client |
- | Copyright (C) 2005-2014, The Roundcube Dev Team |
- | Copyright (C) 2011-2014, Kolab Systems AG |
- | |
- | Licensed under the GNU General Public License version 3 or |
- | any later version with exceptions for skins & plugins. |
- | See the README file for a full license statement. |
- | |
- | PURPOSE: |
- | MIME message parsing utilities |
- +-----------------------------------------------------------------------+
- | Author: Thomas Bruederli <roundcube@gmail.com> |
- | Author: Aleksander Machniak <alec@alec.pl> |
- +-----------------------------------------------------------------------+
- */
-
- /**
- * Class for parsing MIME messages
- *
- * @package Framework
- * @subpackage Storage
- * @author Thomas Bruederli <roundcube@gmail.com>
- * @author Aleksander Machniak <alec@alec.pl>
- */
- class rcube_mime
- {
- private static $default_charset;
-
-
- /**
- * Object constructor.
- */
- function __construct($default_charset = null)
- {
- self::$default_charset = $default_charset;
- }
-
- /**
- * Returns message/object character set name
- *
- * @return string Characted set name
- */
- public static function get_charset()
- {
- if (self::$default_charset) {
- return self::$default_charset;
- }
-
- if ($charset = rcube::get_instance()->config->get('default_charset')) {
- return $charset;
- }
-
- return RCUBE_CHARSET;
- }
-
- /**
- * Parse the given raw message source and return a structure
- * of rcube_message_part objects.
- *
- * It makes use of the rcube_mime_decode library
- *
- * @param string $raw_body The message source
- *
- * @return object rcube_message_part The message structure
- */
- public static function parse_message($raw_body)
- {
- $conf = array(
- 'include_bodies' => true,
- 'decode_bodies' => true,
- 'decode_headers' => false,
- 'default_charset' => self::get_charset(),
- );
-
- $mime = new rcube_mime_decode($conf);
-
- return $mime->decode($raw_body);
- }
-
- /**
- * Split an address list into a structured array list
- *
- * @param string $input Input string
- * @param int $max List only this number of addresses
- * @param boolean $decode Decode address strings
- * @param string $fallback Fallback charset if none specified
- * @param boolean $addronly Return flat array with e-mail addresses only
- *
- * @return array Indexed list of addresses
- */
- static function decode_address_list($input, $max = null, $decode = true, $fallback = null, $addronly = false)
- {
- $a = self::parse_address_list($input, $decode, $fallback);
- $out = array();
- $j = 0;
-
- // Special chars as defined by RFC 822 need to in quoted string (or escaped).
- $special_chars = '[\(\)\<\>\\\.\[\]@,;:"]';
-
- if (!is_array($a))
- return $out;
-
- foreach ($a as $val) {
- $j++;
- $address = trim($val['address']);
-
- if ($addronly) {
- $out[$j] = $address;
- }
- else {
- $name = trim($val['name']);
- if ($name && $address && $name != $address)
- $string = sprintf('%s <%s>', preg_match("/$special_chars/", $name) ? '"'.addcslashes($name, '"').'"' : $name, $address);
- else if ($address)
- $string = $address;
- else if ($name)
- $string = $name;
-
- $out[$j] = array('name' => $name, 'mailto' => $address, 'string' => $string);
- }
-
- if ($max && $j==$max)
- break;
- }
-
- return $out;
- }
-
- /**
- * Decode a message header value
- *
- * @param string $input Header value
- * @param string $fallback Fallback charset if none specified
- *
- * @return string Decoded string
- */
- public static function decode_header($input, $fallback = null)
- {
- $str = self::decode_mime_string((string)$input, $fallback);
-
- return $str;
- }
-
- /**
- * Decode a mime-encoded string to internal charset
- *
- * @param string $input Header value
- * @param string $fallback Fallback charset if none specified
- *
- * @return string Decoded string
- */
- public static function decode_mime_string($input, $fallback = null)
- {
- $default_charset = $fallback ?: self::get_charset();
-
- // rfc: all line breaks or other characters not found
- // in the Base64 Alphabet must be ignored by decoding software
- // delete all blanks between MIME-lines, differently we can
- // receive unnecessary blanks and broken utf-8 symbols
- $input = preg_replace("/\?=\s+=\?/", '?==?', $input);
-
- // encoded-word regexp
- $re = '/=\?([^?]+)\?([BbQq])\?([^\n]*?)\?=/';
-
- // Find all RFC2047's encoded words
- if (preg_match_all($re, $input, $matches, PREG_OFFSET_CAPTURE | PREG_SET_ORDER)) {
- // Initialize variables
- $tmp = array();
- $out = '';
- $start = 0;
-
- foreach ($matches as $idx => $m) {
- $pos = $m[0][1];
- $charset = $m[1][0];
- $encoding = $m[2][0];
- $text = $m[3][0];
- $length = strlen($m[0][0]);
-
- // Append everything that is before the text to be decoded
- if ($start != $pos) {
- $substr = substr($input, $start, $pos-$start);
- $out .= rcube_charset::convert($substr, $default_charset);
- $start = $pos;
- }
- $start += $length;
-
- // Per RFC2047, each string part "MUST represent an integral number
- // of characters . A multi-octet character may not be split across
- // adjacent encoded-words." However, some mailers break this, so we
- // try to handle characters spanned across parts anyway by iterating
- // through and aggregating sequential encoded parts with the same
- // character set and encoding, then perform the decoding on the
- // aggregation as a whole.
-
- $tmp[] = $text;
- if ($next_match = $matches[$idx+1]) {
- if ($next_match[0][1] == $start
- && $next_match[1][0] == $charset
- && $next_match[2][0] == $encoding
- ) {
- continue;
- }
- }
-
- $count = count($tmp);
- $text = '';
-
- // Decode and join encoded-word's chunks
- if ($encoding == 'B' || $encoding == 'b') {
- // base64 must be decoded a segment at a time
- for ($i=0; $i<$count; $i++)
- $text .= base64_decode($tmp[$i]);
- }
- else { //if ($encoding == 'Q' || $encoding == 'q') {
- // quoted printable can be combined and processed at once
- for ($i=0; $i<$count; $i++)
- $text .= $tmp[$i];
-
- $text = str_replace('_', ' ', $text);
- $text = quoted_printable_decode($text);
- }
-
- $out .= rcube_charset::convert($text, $charset);
- $tmp = array();
- }
-
- // add the last part of the input string
- if ($start != strlen($input)) {
- $out .= rcube_charset::convert(substr($input, $start), $default_charset);
- }
-
- // return the results
- return $out;
- }
-
- // no encoding information, use fallback
- return rcube_charset::convert($input, $default_charset);
- }
-
- /**
- * Decode a mime part
- *
- * @param string $input Input string
- * @param string $encoding Part encoding
- *
- * @return string Decoded string
- */
- public static function decode($input, $encoding = '7bit')
- {
- switch (strtolower($encoding)) {
- case 'quoted-printable':
- return quoted_printable_decode($input);
- case 'base64':
- return base64_decode($input);
- case 'x-uuencode':
- case 'x-uue':
- case 'uue':
- case 'uuencode':
- return convert_uudecode($input);
- case '7bit':
- default:
- return $input;
- }
- }
-
- /**
- * Split RFC822 header string into an associative array
- */
- public static function parse_headers($headers)
- {
- $a_headers = array();
- $headers = preg_replace('/\r?\n(\t| )+/', ' ', $headers);
- $lines = explode("\n", $headers);
- $c = count($lines);
-
- for ($i=0; $i<$c; $i++) {
- if ($p = strpos($lines[$i], ': ')) {
- $field = strtolower(substr($lines[$i], 0, $p));
- $value = trim(substr($lines[$i], $p+1));
- if (!empty($value))
- $a_headers[$field] = $value;
- }
- }
-
- return $a_headers;
- }
-
- /**
- * E-mail address list parser
- */
- private static function parse_address_list($str, $decode = true, $fallback = null)
- {
- // remove any newlines and carriage returns before
- $str = preg_replace('/\r?\n(\s|\t)?/', ' ', $str);
-
- // extract list items, remove comments
- $str = self::explode_header_string(',;', $str, true);
- $result = array();
-
- // simplified regexp, supporting quoted local part
- $email_rx = '(\S+|("\s*(?:[^"\f\n\r\t\v\b\s]+\s*)+"))@\S+';
-
- foreach ($str as $key => $val) {
- $name = '';
- $address = '';
- $val = trim($val);
-
- if (preg_match('/(.*)<('.$email_rx.')>$/', $val, $m)) {
- $address = $m[2];
- $name = trim($m[1]);
- }
- else if (preg_match('/^('.$email_rx.')$/', $val, $m)) {
- $address = $m[1];
- $name = '';
- }
- // special case (#1489092)
- else if (preg_match('/(\s*<MAILER-DAEMON>)$/', $val, $m)) {
- $address = 'MAILER-DAEMON';
- $name = substr($val, 0, -strlen($m[1]));
- }
- else if (preg_match('/('.$email_rx.')/', $val, $m)) {
- $name = $m[1];
- }
- else {
- $name = $val;
- }
-
- // dequote and/or decode name
- if ($name) {
- if ($name[0] == '"' && $name[strlen($name)-1] == '"') {
- $name = substr($name, 1, -1);
- $name = stripslashes($name);
- }
- if ($decode) {
- $name = self::decode_header($name, $fallback);
- // some clients encode addressee name with quotes around it
- if ($name[0] == '"' && $name[strlen($name)-1] == '"') {
- $name = substr($name, 1, -1);
- }
- }
- }
-
- if (!$address && $name) {
- $address = $name;
- $name = '';
- }
-
- if ($address) {
- $address = self::fix_email($address);
- $result[$key] = array('name' => $name, 'address' => $address);
- }
- }
-
- return $result;
- }
-
- /**
- * Explodes header (e.g. address-list) string into array of strings
- * using specified separator characters with proper handling
- * of quoted-strings and comments (RFC2822)
- *
- * @param string $separator String containing separator characters
- * @param string $str Header string
- * @param bool $remove_comments Enable to remove comments
- *
- * @return array Header items
- */
- public static function explode_header_string($separator, $str, $remove_comments = false)
- {
- $length = strlen($str);
- $result = array();
- $quoted = false;
- $comment = 0;
- $out = '';
-
- for ($i=0; $i<$length; $i++) {
- // we're inside a quoted string
- if ($quoted) {
- if ($str[$i] == '"') {
- $quoted = false;
- }
- else if ($str[$i] == "\\") {
- if ($comment <= 0) {
- $out .= "\\";
- }
- $i++;
- }
- }
- // we are inside a comment string
- else if ($comment > 0) {
- if ($str[$i] == ')') {
- $comment--;
- }
- else if ($str[$i] == '(') {
- $comment++;
- }
- else if ($str[$i] == "\\") {
- $i++;
- }
- continue;
- }
- // separator, add to result array
- else if (strpos($separator, $str[$i]) !== false) {
- if ($out) {
- $result[] = $out;
- }
- $out = '';
- continue;
- }
- // start of quoted string
- else if ($str[$i] == '"') {
- $quoted = true;
- }
- // start of comment
- else if ($remove_comments && $str[$i] == '(') {
- $comment++;
- }
-
- if ($comment <= 0) {
- $out .= $str[$i];
- }
- }
-
- if ($out && $comment <= 0) {
- $result[] = $out;
- }
-
- return $result;
- }
-
- /**
- * Interpret a format=flowed message body according to RFC 2646
- *
- * @param string $text Raw body formatted as flowed text
- * @param string $mark Mark each flowed line with specified character
- *
- * @return string Interpreted text with unwrapped lines and stuffed space removed
- */
- public static function unfold_flowed($text, $mark = null)
- {
- $text = preg_split('/\r?\n/', $text);
- $last = -1;
- $q_level = 0;
- $marks = array();
-
- foreach ($text as $idx => $line) {
- if (preg_match('/^(>+)/', $line, $m)) {
- // remove quote chars
- $q = strlen($m[1]);
- $line = preg_replace('/^>+/', '', $line);
- // remove (optional) space-staffing
- $line = preg_replace('/^ /', '', $line);
-
- // The same paragraph (We join current line with the previous one) when:
- // - the same level of quoting
- // - previous line was flowed
- // - previous line contains more than only one single space (and quote char(s))
- if ($q == $q_level
- && isset($text[$last]) && $text[$last][strlen($text[$last])-1] == ' '
- && !preg_match('/^>+ {0,1}$/', $text[$last])
- ) {
- $text[$last] .= $line;
- unset($text[$idx]);
-
- if ($mark) {
- $marks[$last] = true;
- }
- }
- else {
- $last = $idx;
- }
- }
- else {
- $q = 0;
- if ($line == '-- ') {
- $last = $idx;
- }
- else {
- // remove space-stuffing
- $line = preg_replace('/^ /', '', $line);
-
- if (isset($text[$last]) && $line && !$q_level
- && $text[$last] != '-- '
- && $text[$last][strlen($text[$last])-1] == ' '
- ) {
- $text[$last] .= $line;
- unset($text[$idx]);
-
- if ($mark) {
- $marks[$last] = true;
- }
- }
- else {
- $text[$idx] = $line;
- $last = $idx;
- }
- }
- }
- $q_level = $q;
- }
-
- if (!empty($marks)) {
- foreach (array_keys($marks) as $mk) {
- $text[$mk] = $mark . $text[$mk];
- }
- }
-
- return implode("\r\n", $text);
- }
-
- /**
- * Wrap the given text to comply with RFC 2646
- *
- * @param string $text Text to wrap
- * @param int $length Length
- * @param string $charset Character encoding of $text
- *
- * @return string Wrapped text
- */
- public static function format_flowed($text, $length = 72, $charset=null)
- {
- $text = preg_split('/\r?\n/', $text);
-
- foreach ($text as $idx => $line) {
- if ($line != '-- ') {
- if (preg_match('/^(>+)/', $line, $m)) {
- // remove quote chars
- $level = strlen($m[1]);
- $line = preg_replace('/^>+/', '', $line);
- // remove (optional) space-staffing and spaces before the line end
- $line = preg_replace('/(^ | +$)/', '', $line);
- $prefix = str_repeat('>', $level) . ' ';
- $line = $prefix . self::wordwrap($line, $length - $level - 2, " \r\n$prefix", false, $charset);
- }
- else if ($line) {
- $line = self::wordwrap(rtrim($line), $length - 2, " \r\n", false, $charset);
- // space-stuffing
- $line = preg_replace('/(^|\r\n)(From| |>)/', '\\1 \\2', $line);
- }
-
- $text[$idx] = $line;
- }
- }
-
- return implode("\r\n", $text);
- }
-
- /**
- * Improved wordwrap function with multibyte support.
- * The code is based on Zend_Text_MultiByte::wordWrap().
- *
- * @param string $string Text to wrap
- * @param int $width Line width
- * @param string $break Line separator
- * @param bool $cut Enable to cut word
- * @param string $charset Charset of $string
- * @param bool $wrap_quoted When enabled quoted lines will not be wrapped
- *
- * @return string Text
- */
- public static function wordwrap($string, $width=75, $break="\n", $cut=false, $charset=null, $wrap_quoted=true)
- {
- // Note: Never try to use iconv instead of mbstring functions here
- // Iconv's substr/strlen are 100x slower (#1489113)
-
- if ($charset && $charset != RCUBE_CHARSET) {
- mb_internal_encoding($charset);
- }
-
- // Convert \r\n to \n, this is our line-separator
- $string = str_replace("\r\n", "\n", $string);
- $separator = "\n"; // must be 1 character length
- $result = array();
-
- while (($stringLength = mb_strlen($string)) > 0) {
- $breakPos = mb_strpos($string, $separator, 0);
-
- // quoted line (do not wrap)
- if ($wrap_quoted && $string[0] == '>') {
- if ($breakPos === $stringLength - 1 || $breakPos === false) {
- $subString = $string;
- $cutLength = null;
- }
- else {
- $subString = mb_substr($string, 0, $breakPos);
- $cutLength = $breakPos + 1;
- }
- }
- // next line found and current line is shorter than the limit
- else if ($breakPos !== false && $breakPos < $width) {
- if ($breakPos === $stringLength - 1) {
- $subString = $string;
- $cutLength = null;
- }
- else {
- $subString = mb_substr($string, 0, $breakPos);
- $cutLength = $breakPos + 1;
- }
- }
- else {
- $subString = mb_substr($string, 0, $width);
-
- // last line
- if ($breakPos === false && $subString === $string) {
- $cutLength = null;
- }
- else {
- $nextChar = mb_substr($string, $width, 1);
-
- if ($nextChar === ' ' || $nextChar === $separator) {
- $afterNextChar = mb_substr($string, $width + 1, 1);
-
- // Note: mb_substr() does never return False
- if ($afterNextChar === false || $afterNextChar === '') {
- $subString .= $nextChar;
- }
-
- $cutLength = mb_strlen($subString) + 1;
- }
- else {
- $spacePos = mb_strrpos($subString, ' ', 0);
-
- if ($spacePos !== false) {
- $subString = mb_substr($subString, 0, $spacePos);
- $cutLength = $spacePos + 1;
- }
- else if ($cut === false) {
- $spacePos = mb_strpos($string, ' ', 0);
-
- if ($spacePos !== false && ($breakPos === false || $spacePos < $breakPos)) {
- $subString = mb_substr($string, 0, $spacePos);
- $cutLength = $spacePos + 1;
- }
- else if ($breakPos === false) {
- $subString = $string;
- $cutLength = null;
- }
- else {
- $subString = mb_substr($string, 0, $breakPos);
- $cutLength = $breakPos + 1;
- }
- }
- else {
- $cutLength = $width;
- }
- }
- }
- }
-
- $result[] = $subString;
-
- if ($cutLength !== null) {
- $string = mb_substr($string, $cutLength, ($stringLength - $cutLength));
- }
- else {
- break;
- }
- }
-
- if ($charset && $charset != RCUBE_CHARSET) {
- mb_internal_encoding(RCUBE_CHARSET);
- }
-
- return implode($break, $result);
- }
-
- /**
- * A method to guess the mime_type of an attachment.
- *
- * @param string $path Path to the file or file contents
- * @param string $name File name (with suffix)
- * @param string $failover Mime type supplied for failover
- * @param boolean $is_stream Set to True if $path contains file contents
- * @param boolean $skip_suffix Set to True if the config/mimetypes.php mappig should be ignored
- *
- * @return string
- * @author Till Klampaeckel <till@php.net>
- * @see http://de2.php.net/manual/en/ref.fileinfo.php
- * @see http://de2.php.net/mime_content_type
- */
- public static function file_content_type($path, $name, $failover = 'application/octet-stream', $is_stream = false, $skip_suffix = false)
- {
- static $mime_ext = array();
-
- $mime_type = null;
- $config = rcube::get_instance()->config;
- $mime_magic = $config->get('mime_magic');
-
- if (!$skip_suffix && empty($mime_ext)) {
- foreach ($config->resolve_paths('mimetypes.php') as $fpath) {
- $mime_ext = array_merge($mime_ext, (array) @include($fpath));
- }
- }
-
- // use file name suffix with hard-coded mime-type map
- if (!$skip_suffix && is_array($mime_ext) && $name) {
- if ($suffix = substr($name, strrpos($name, '.')+1)) {
- $mime_type = $mime_ext[strtolower($suffix)];
- }
- }
-
- // try fileinfo extension if available
- if (!$mime_type && function_exists('finfo_open')) {
- // null as a 2nd argument should be the same as no argument
- // this however is not true on all systems/versions
- if ($mime_magic) {
- $finfo = finfo_open(FILEINFO_MIME, $mime_magic);
- }
- else {
- $finfo = finfo_open(FILEINFO_MIME);
- }
-
- if ($finfo) {
- if ($is_stream)
- $mime_type = finfo_buffer($finfo, $path);
- else
- $mime_type = finfo_file($finfo, $path);
- finfo_close($finfo);
- }
- }
-
- // try PHP's mime_content_type
- if (!$mime_type && !$is_stream && function_exists('mime_content_type')) {
- $mime_type = @mime_content_type($path);
- }
-
- // fall back to user-submitted string
- if (!$mime_type) {
- $mime_type = $failover;
- }
- else {
- // Sometimes (PHP-5.3?) content-type contains charset definition,
- // Remove it (#1487122) also "charset=binary" is useless
- $mime_type = array_shift(preg_split('/[; ]/', $mime_type));
- }
-
- return $mime_type;
- }
-
- /**
- * Get mimetype => file extension mapping
- *
- * @param string Mime-Type to get extensions for
- *
- * @return array List of extensions matching the given mimetype or a hash array
- * with ext -> mimetype mappings if $mimetype is not given
- */
- public static function get_mime_extensions($mimetype = null)
- {
- static $mime_types, $mime_extensions;
-
- // return cached data
- if (is_array($mime_types)) {
- return $mimetype ? $mime_types[$mimetype] : $mime_extensions;
- }
-
- // load mapping file
- $file_paths = array();
-
- if ($mime_types = rcube::get_instance()->config->get('mime_types')) {
- $file_paths[] = $mime_types;
- }
-
- // try common locations
- if (strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
- $file_paths[] = 'C:/xampp/apache/conf/mime.types.';
- }
- else {
- $file_paths[] = '/etc/mime.types';
- $file_paths[] = '/etc/httpd/mime.types';
- $file_paths[] = '/etc/httpd2/mime.types';
- $file_paths[] = '/etc/apache/mime.types';
- $file_paths[] = '/etc/apache2/mime.types';
- $file_paths[] = '/etc/nginx/mime.types';
- $file_paths[] = '/usr/local/etc/httpd/conf/mime.types';
- $file_paths[] = '/usr/local/etc/apache/conf/mime.types';
- }
-
- foreach ($file_paths as $fp) {
- if (@is_readable($fp)) {
- $lines = file($fp, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
- break;
- }
- }
-
- $mime_types = $mime_extensions = array();
- $regex = "/([\w\+\-\.\/]+)\s+([\w\s]+)/i";
- foreach((array)$lines as $line) {
- // skip comments or mime types w/o any extensions
- if ($line[0] == '#' || !preg_match($regex, $line, $matches))
- continue;
-
- $mime = $matches[1];
- foreach (explode(' ', $matches[2]) as $ext) {
- $ext = trim($ext);
- $mime_types[$mime][] = $ext;
- $mime_extensions[$ext] = $mime;
- }
- }
-
- // fallback to some well-known types most important for daily emails
- if (empty($mime_types)) {
- foreach (rcube::get_instance()->config->resolve_paths('mimetypes.php') as $fpath) {
- $mime_extensions = array_merge($mime_extensions, (array) @include($fpath));
- }
-
- foreach ($mime_extensions as $ext => $mime) {
- $mime_types[$mime][] = $ext;
- }
- }
-
- // Add some known aliases that aren't included by some mime.types (#1488891)
- // the order is important here so standard extensions have higher prio
- $aliases = array(
- 'image/gif' => array('gif'),
- 'image/png' => array('png'),
- 'image/x-png' => array('png'),
- 'image/jpeg' => array('jpg', 'jpeg', 'jpe'),
- 'image/jpg' => array('jpg', 'jpeg', 'jpe'),
- 'image/pjpeg' => array('jpg', 'jpeg', 'jpe'),
- 'image/tiff' => array('tif'),
- 'message/rfc822' => array('eml'),
- 'text/x-mail' => array('eml'),
- );
-
- foreach ($aliases as $mime => $exts) {
- $mime_types[$mime] = array_unique(array_merge((array) $mime_types[$mime], $exts));
-
- foreach ($exts as $ext) {
- if (!isset($mime_extensions[$ext])) {
- $mime_extensions[$ext] = $mime;
- }
- }
- }
-
- return $mimetype ? $mime_types[$mimetype] : $mime_extensions;
- }
-
- /**
- * Detect image type of the given binary data by checking magic numbers.
- *
- * @param string $data Binary file content
- *
- * @return string Detected mime-type or jpeg as fallback
- */
- public static function image_content_type($data)
- {
- $type = 'jpeg';
- if (preg_match('/^\x89\x50\x4E\x47/', $data)) $type = 'png';
- else if (preg_match('/^\x47\x49\x46\x38/', $data)) $type = 'gif';
- else if (preg_match('/^\x00\x00\x01\x00/', $data)) $type = 'ico';
- // else if (preg_match('/^\xFF\xD8\xFF\xE0/', $data)) $type = 'jpeg';
-
- return 'image/' . $type;
- }
-
- /**
- * Try to fix invalid email addresses
- */
- public static function fix_email($email)
- {
- $parts = rcube_utils::explode_quoted_string('@', $email);
- foreach ($parts as $idx => $part) {
- // remove redundant quoting (#1490040)
- if ($part[0] == '"' && preg_match('/^"([a-zA-Z0-9._+=-]+)"$/', $part, $m)) {
- $parts[$idx] = $m[1];
- }
- }
-
- return implode('@', $parts);
- }
- }
|