if ($attached) {

                $content_type = 'multipart/form-data';

                $content_disposition = array_pop(explode('/', $content_type));

                $nonce = self::generateNonce();

                $boundary = "--------------------------------$nonce";

                $contents = '';

                foreach ($parameters as $param => $value) {

                    $contents .= '--'.$boundary.$crlf;

                    $contents .= "Content-Disposition: $content_disposition"

                              .  "; name=\"$param\"";

                    if ($value instanceof Me2Image) {

                        $name = $value->name;

                        $mime = $value->mime;

                        $contents .= "; filename=\"$name\"$crlf"

                                  .  "Content-Transfer-Encoding: binary$crlf"

                                  .  "Content-Type: $mime$crlf";

                    } else {

                        $contents .= $crlf;

                    }

                    $contents .= $crlf . $value . $crlf;

                $contents .= "--$boundary$crlf";

                $headers['Content-Type'] = "$content_type; boundary=$boundary";

            } else {

                $content_type = 'application/x-www-form-urlencoded';

                $headers['Content-Type'] = $content_type;

                $contents = "$query$crlf";

class Me2Callback extends Me2Attachment {

    const Document = 'document';

    const Photo = 'photo';

    const Video = 'video';

    const Audio = 'audio';

    const Friend = 'friend';

    function __construct($url, $icon, $type = self::Document) {

        $this->type = $type;