| | |
| | | */ |
| | | function decode_mime_string($input, $fallback=null) |
| | | { |
| | | // Initialize variable |
| | | $out = ''; |
| | | |
| | | $pos = strpos($input, '=?'); |
| | | if ($pos !== false) |
| | | { |
| | | // 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); |
| | | // Iterate instead of recursing, this way if there are too many values we don't have stack overflows |
| | | // 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); |
| | | |
| | | $out = substr($input, 0, $pos); |
| | | |
| | | $end_cs_pos = strpos($input, "?", $pos+2); |
| | | $end_en_pos = strpos($input, "?", $end_cs_pos+1); |
| | | $end_pos = strpos($input, "?=", $end_en_pos+1); |
| | | |
| | | $encstr = substr($input, $pos+2, ($end_pos-$pos-2)); |
| | | $rest = substr($input, $end_pos+2); |
| | | // Check if there is stuff to decode |
| | | if (strpos($input, '=?') !== false) { |
| | | // Loop through the string to decode all occurences of =? ?= into the variable $out |
| | | while(($pos = strpos($input, '=?')) !== false) { |
| | | // Append everything that is before the text to be decoded |
| | | $out .= substr($input, 0, $pos); |
| | | |
| | | $out .= rcube_imap::_decode_mime_string_part($encstr); |
| | | $out .= rcube_imap::decode_mime_string($rest, $fallback); |
| | | // Get the location of the text to decode |
| | | $end_cs_pos = strpos($input, "?", $pos+2); |
| | | $end_en_pos = strpos($input, "?", $end_cs_pos+1); |
| | | $end_pos = strpos($input, "?=", $end_en_pos+1); |
| | | |
| | | return $out; |
| | | // Extract the encoded string |
| | | $encstr = substr($input, $pos+2, ($end_pos-$pos-2)); |
| | | // Extract the remaining string |
| | | $input = substr($input, $end_pos+2); |
| | | |
| | | // Decode the string fragement |
| | | $out .= rcube_imap::_decode_mime_string_part($encstr); |
| | | } |
| | | |
| | | // Deocde the rest (if any) |
| | | if (strlen($input) != 0) |
| | | $out .= rcube_imap::decode_mime_string($input, $fallback); |
| | | |
| | | // return the results |
| | | return $out; |
| | | } |
| | | |
| | | // no encoding information, use fallback |
| | | return rcube_charset_convert($input, |
| | | !empty($fallback) ? $fallback : rcmail::get_instance()->config->get('default_charset', 'ISO-8859-1')); |