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diff --git a/program/lib/Roundcube/rcube_mime.php b/program/lib/Roundcube/rcube_mime.php
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+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | program/include/rcube_mime.php |
+ | |
+ | This file is part of the Roundcube Webmail client |
+ | Copyright (C) 2005-2012, The Roundcube Dev Team |
+ | Copyright (C) 2011-2012, 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 $charset;
+ }
+
+ return RCUBE_CHARSET;
+ }
+
+
+ /**
+ * Parse the given raw message source and return a structure
+ * of rcube_message_part objects.
+ *
+ * It makes use of the PEAR:Mail_mimeDecode library
+ *
+ * @param string The message source
+ * @return object rcube_message_part The message structure
+ */
+ public static function parse_message($raw_body)
+ {
+ $mime = new Mail_mimeDecode($raw_body);
+ $struct = $mime->decode(array('include_bodies' => true, 'decode_bodies' => true));
+ return self::structure_part($struct);
+ }
+
+
+ /**
+ * Recursive method to convert a Mail_mimeDecode part into a rcube_message_part object
+ *
+ * @param object A message part struct
+ * @param int Part count
+ * @param string Parent MIME ID
+ *
+ * @return object rcube_message_part
+ */
+ private static function structure_part($part, $count=0, $parent='')
+ {
+ $struct = new rcube_message_part;
+ $struct->mime_id = $part->mime_id ? $part->mime_id : (empty($parent) ? (string)$count : "$parent.$count");
+ $struct->headers = $part->headers;
+ $struct->ctype_primary = $part->ctype_primary;
+ $struct->ctype_secondary = $part->ctype_secondary;
+ $struct->mimetype = $part->ctype_primary . '/' . $part->ctype_secondary;
+ $struct->ctype_parameters = $part->ctype_parameters;
+
+ if ($part->headers['content-transfer-encoding'])
+ $struct->encoding = $part->headers['content-transfer-encoding'];
+ if ($part->ctype_parameters['charset'])
+ $struct->charset = $part->ctype_parameters['charset'];
+
+ $part_charset = $struct->charset ? $struct->charset : self::get_charset();
+
+ // determine filename
+ if (($filename = $part->d_parameters['filename']) || ($filename = $part->ctype_parameters['name'])) {
+ $struct->filename = rcube_mime::decode_mime_string($filename, $part_charset);
+ }
+
+ // copy part body and convert it to UTF-8 if necessary
+ $struct->body = $part->ctype_primary == 'text' || !$part->ctype_parameters['charset'] ? rcube_charset::convert($part->body, $part_charset) : $part->body;
+ $struct->size = strlen($part->body);
+ $struct->disposition = $part->disposition;
+
+ foreach ((array)$part->parts as $child_part) {
+ $struct->parts[] = self::structure_part($child_part, ++$count, $struct->mime_id);
+ }
+
+ return $struct;
+ }
+
+
+ /**
+ * 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 $fallback Fallback charset if none specified
+ *
+ * @return array Indexed list of addresses
+ */
+ static function decode_address_list($input, $max = null, $decode = true, $fallback = null)
+ {
+ $a = self::parse_address_list($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']);
+ $name = trim($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)
+ {
+ $default_charset = !empty($fallback) ? $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 $input;
+ }
+ }
+
+
+ /**
+ * Split RFC822 header string into an associative array
+ * @access private
+ */
+ public static function parse_headers($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 $a_headers;
+ }
+
+
+ /**
+ * @access private
+ */
+ private static function parse_address_list($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 = '';
+ }
+ 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, $fallback);
+ }
+ }
+
+ if (!$address && $name) {
+ $address = $name;
+ }
+
+ if ($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 $text Raw body formatted as flowed text
+ *
+ * @return string Interpreted text with unwrapped lines and stuffed space removed
+ */
+ public static function unfold_flowed($text)
+ {
+ $text = preg_split('/\r?\n/', $text);
+ $last = -1;
+ $q_level = 0;
+
+ foreach ($text as $idx => $line) {
+ if ($line[0] == '>' && preg_match('/^(>+\s*)/', $line, $regs)) {
+ $q = strlen(str_replace(' ', '', $regs[0]));
+ $line = substr($line, strlen($regs[0]));
+
+ if ($q == $q_level && $line
+ && isset($text[$last])
+ && $text[$last][strlen($text[$last])-1] == ' '
+ ) {
+ $text[$last] .= $line;
+ unset($text[$idx]);
+ }
+ else {
+ $last = $idx;
+ }
+ }
+ else {
+ $q = 0;
+ if ($line == '-- ') {
+ $last = $idx;
+ }
+ else {
+ // remove space-stuffing
+ $line = preg_replace('/^\s/', '', $line);
+
+ if (isset($text[$last]) && $line
+ && $text[$last] != '-- '
+ && $text[$last][strlen($text[$last])-1] == ' '
+ ) {
+ $text[$last] .= $line;
+ unset($text[$idx]);
+ }
+ else {
+ $text[$idx] = $line;
+ $last = $idx;
+ }
+ }
+ }
+ $q_level = $q;
+ }
+
+ 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 ($line[0] == '>' && preg_match('/^(>+ {0,1})+/', $line, $regs)) {
+ $level = substr_count($regs[0], '>');
+ $prefix = str_repeat('>', $level) . ' ';
+ $line = rtrim(substr($line, strlen($regs[0])));
+ $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.
+ *
+ * @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 $string
+ *
+ * @return string Text
+ */
+ public static function wordwrap($string, $width=75, $break="\n", $cut=false, $charset=null)
+ {
+ if ($charset && function_exists('mb_internal_encoding')) {
+ mb_internal_encoding($charset);
+ }
+
+ $para = preg_split('/\r?\n/', $string);
+ $string = '';
+
+ while (count($para)) {
+ $line = array_shift($para);
+ if ($line[0] == '>') {
+ $string .= $line.$break;
+ continue;
+ }
+
+ $list = explode(' ', $line);
+ $len = 0;
+ while (count($list)) {
+ $line = array_shift($list);
+ $l = mb_strlen($line);
+ $newlen = $len + $l + ($len ? 1 : 0);
+
+ if ($newlen <= $width) {
+ $string .= ($len ? ' ' : '').$line;
+ $len += (1 + $l);
+ }
+ else {
+ if ($l > $width) {
+ if ($cut) {
+ $start = 0;
+ while ($l) {
+ $str = mb_substr($line, $start, $width);
+ $strlen = mb_strlen($str);
+ $string .= ($len ? $break : '').$str;
+ $start += $strlen;
+ $l -= $strlen;
+ $len = $strlen;
+ }
+ }
+ else {
+ $string .= ($len ? $break : '').$line;
+ if (count($list)) {
+ $string .= $break;
+ }
+ $len = 0;
+ }
+ }
+ else {
+ $string .= $break.$line;
+ $len = $l;
+ }
+ }
+ }
+
+ if (count($para)) {
+ $string .= $break;
+ }
+ }
+
+ if ($charset && function_exists('mb_internal_encoding')) {
+ mb_internal_encoding(RCUBE_CHARSET);
+ }
+
+ return $string;
+ }
+
+
+ /**
+ * 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)
+ {
+ $mime_type = null;
+ $mime_magic = rcube::get_instance()->config->get('mime_magic');
+ $mime_ext = $skip_suffix ? null : @include(RCUBE_CONFIG_DIR . '/mimetypes.php');
+
+ // use file name suffix with hard-coded mime-type map
+ if (is_array($mime_ext) && $name) {
+ if ($suffix = substr($name, strrpos($name, '.')+1)) {
+ $mime_type = $mime_ext[strtolower($suffix)];
+ }
+ }
+
+ // try fileinfo extension if available
+ if (!$mime_type && function_exists('finfo_open')) {
+ if ($finfo = finfo_open(FILEINFO_MIME, $mime_magic)) {
+ if ($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
+ $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[] = '/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);
+ break;
+ }
+ }
+
+ $mime_types = $mime_extensions = array();
+ $regex = "/([\w\+\-\.\/]+)\t+([\w\s]+)/i";
+ foreach((array)$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)) {
+ $mime_extensions = @include(RCUBE_CONFIG_DIR . '/mimetypes.php');
+ $mime_extensions += array('gif' => 'image/gif', 'png' => 'image/png', 'jpg' => 'image/jpg', 'jpeg' => 'image/jpeg', 'tif' => 'image/tiff');
+
+ foreach ($mime_extensions as $ext => $mime)
+ $mime_types[$mime][] = $ext;
+ }
+
+ 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;
+ }
+
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-14 03:33:03 +0000