Fix support for large uuencode attachments.

Giovanni Bajo

2012-05-12 e63952d2fdd6efaa4a10dd47774f849af6f048a5

Fix support for large uuencode attachments.

Currently, Roundcube tries to match with a regexp a whole uuencode
attachment. This is not always possible because PHP enforces a limit
on the maximum match size.

 program/include/rcube_message.php

@@ -653,23 +653,29 @@

        $parts = array();
        // FIXME: line length is max.65?
        $uu_regexp = '/begin [0-7]{3,4} ([^\n]+)\n(([\x21-\x7E]{0,65}\n)+)`\nend/s';
        $uu_regexp = '/begin [0-7]{3,4} ([^\n]+)\n/s';

        if (preg_match_all($uu_regexp, $part->body, $matches, PREG_SET_ORDER)) {
            // remove attachments bodies from the message body
            $part->body = preg_replace($uu_regexp, '', $part->body);
            // update message content-type
            $part->ctype_primary   = 'multipart';
            $part->ctype_secondary = 'mixed';
            $part->mimetype        = $part->ctype_primary . '/' . $part->ctype_secondary;
            $uu_endstring = "`\nend\n";

            // add attachments to the structure
            foreach ($matches as $pid => $att) {
                $startpos = strpos($part->body, $att[1]) + strlen($att[1]) + 1; // "\n"
                $endpos = strpos($part->body, $uu_endstring);
                $filebody = substr($part->body, $startpos, $endpos-$startpos);

                // remove attachments bodies from the message body
                $part->body = substr_replace($part->body, "", $startpos, $endpos+strlen($uu_endstring)-$startpos);

                $uupart = new rcube_message_part;

                $uupart->filename = trim($att[1]);
                $uupart->encoding = 'stream';
                $uupart->body     = convert_uudecode($att[2]);
                $uupart->body     = convert_uudecode($filebody);
                $uupart->size     = strlen($uupart->body);
                $uupart->mime_id  = 'uu.' . $part->mime_id . '.' . $pid;

@@ -680,6 +686,9 @@
                $parts[] = $uupart;
                unset($matches[$pid]);
            }

            // remove attachments bodies from the message body
            $part->body = preg_replace($uu_regexp, '', $part->body);
        }

        return $parts;