Aerys\BodyParser::__construct PHP Method

    public function __construct(Request $req, array $options = [])
    {
        $this->req = $req;
        $type = $req->getHeader("content-type");
        $this->body = $req->getBody($this->totalSize = $this->size = $options["size"] ?? 131072);
        $this->maxFieldLen = $options["field_len"] ?? 16384;
        $this->maxInputVars = $options["input_vars"] ?? 200;
        if ($type !== null && strncmp($type, "application/x-www-form-urlencoded", \strlen("application/x-www-form-urlencoded"))) {
            if (!preg_match('#^\\s*multipart/(?:form-data|mixed)(?:\\s*;\\s*boundary\\s*=\\s*("?)([^"]*)\\1)?$#', $type, $m)) {
                $this->req = null;
                $this->parsing = true;
                $this->result = new ParsedBody([]);
                return;
            }
            $this->boundary = $m[2];
        }
        $this->body->when(function ($e, $data) {
            $this->req = null;
            \Amp\immediately(function () use($e, $data) {
                if ($e) {
                    if ($e instanceof ClientSizeException) {
                        $e = new ClientException("", 0, $e);
                    }
                    $this->error = $e;
                } else {
                    $this->result = $this->end($data);
                }
                if (!$this->parsing) {
                    $this->parsing = true;
                    foreach ($this->result->getNames() as $field) {
                        foreach ($this->result->getArray($field) as $_) {
                            foreach ($this->watchers as list($cb, $cbData)) {
                                $cb($field, $cbData);
                            }
                        }
                    }
                }
                $this->parsing = true;
                foreach ($this->whens as list($cb, $cbData)) {
                    $cb($this->error, $this->result, $cbData);
                }
                $this->whens = $this->watchers = [];
            });
        });
    }