HTTPRequest::wait_for_body PHP Method

    public function wait_for_body($event, $args)
    {
        switch ($event) {
            case 'body':
                $content_length = $this->headers['Content-Length'];
                $rcvd = $args[0];
                $rcvd_len = strlen($rcvd);
                $this->recvd_body_len += $rcvd_len;
                if ($this->body === null) {
                    $this->body = $rcvd;
                } else {
                    $this->body .= $rcvd;
                }
                if ($this->multipart) {
                    // boundary start, content_disposition, form data, boundary start, ....., boundary end
                    // these define various states of a multipart/form-data
                    $form_data = explode(HTTPServer::HTTP_CRLF, $rcvd);
                    foreach ($form_data as $data) {
                        //JAXLLogger::debug("passing $data to multipart fsm");
                        if (!$this->multipart->process($data)) {
                            JAXLLogger::debug("multipart fsm returned false");
                            $this->close();
                            return array('closed', false);
                        }
                    }
                }
                if ($this->recvd_body_len < $content_length && $this->multipart->state() != 'done') {
                    JAXLLogger::debug("rcvd body len: {$this->recvd_body_len}/{$content_length}");
                    return 'wait_for_body';
                } else {
                    JAXLLogger::debug("all data received, switching state for dispatch");
                    return 'headers_received';
                }
                break;
            case 'set_header':
                $content_length = $this->headers['Content-Length'];
                $body = implode(":", $args);
                $rcvd_len = strlen($body);
                $this->recvd_body_len += $rcvd_len;
                if (!$this->multipart->process($body)) {
                    JAXLLogger::debug("multipart fsm returned false");
                    $this->close();
                    return array('closed', false);
                }
                if ($this->recvd_body_len < $content_length) {
                    JAXLLogger::debug("rcvd body len: {$this->recvd_body_len}/{$content_length}");
                    return 'wait_for_body';
                } else {
                    JAXLLogger::debug("all data received, switching state for dispatch");
                    return 'headers_received';
                }
                break;
            case 'empty_line':
                $content_length = $this->headers['Content-Length'];
                if (!$this->multipart->process('')) {
                    JAXLLogger::debug("multipart fsm returned false");
                    $this->close();
                    return array('closed', false);
                }
                if ($this->recvd_body_len < $content_length) {
                    JAXLLogger::debug("rcvd body len: {$this->recvd_body_len}/{$content_length}");
                    return 'wait_for_body';
                } else {
                    JAXLLogger::debug("all data received, switching state for dispatch");
                    return 'headers_received';
                }
                break;
            default:
                JAXLLogger::warning("uncatched {$event}");
                return 'wait_for_body';
        }
    }