Workerman\Protocols\Http::input PHP Метод

    public static function input($recv_buffer, TcpConnection $connection)
    {
        if (!strpos($recv_buffer, "\r\n\r\n")) {
            // Judge whether the package length exceeds the limit.
            if (strlen($recv_buffer) >= TcpConnection::$maxPackageSize) {
                $connection->close();
                return 0;
            }
            return 0;
        }
        list($header, ) = explode("\r\n\r\n", $recv_buffer, 2);
        if (0 === strpos($recv_buffer, "POST")) {
            // find Content-Length
            $match = array();
            if (preg_match("/\r\nContent-Length: ?(\\d+)/i", $header, $match)) {
                $content_length = $match[1];
                return $content_length + strlen($header) + 4;
            } else {
                return 0;
            }
        } elseif (0 === strpos($recv_buffer, "GET")) {
            return strlen($header) + 4;
        } else {
            $connection->send("HTTP/1.1 400 Bad Request\r\n\r\n", true);
            return 0;
        }
    }