Zend_Mime_Exception example

/** * if this was created with a stream, return a filtered stream for * reading the content. very useful for large file attachments. * * @return stream * @throws Zend_Mime_Exception if not a stream or unable to append filter */
    public function getEncodedStream()
    {
        if (!$this->_isStream) {
            throw new Zend_Mime_Exception('Attempt to get a stream from a string part');
        }

        //stream_filter_remove(); // ??? is that right?         switch ($this->encoding) {
            case Zend_Mime::ENCODING_QUOTEDPRINTABLE:
                $filter = stream_filter_append(
                    $this->_content,
                    'convert.quoted-printable-encode',
                    STREAM_FILTER_READ,
                    array(
                        'line-length'      => 76,