response.php

См. документацию.

<?php

 
namespace Bitrix\Main\Web\Http;
 
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\StreamInterface;
 
class Response extends Message implements ResponseInterface
{
    public function __construct(int $statusCode, array $headers = null, StreamInterface $body = null, string $version = null, string $reasonPhrase = '')
    {
        parent::__construct($headers, $body, $version);
 
        $this->headers->setStatus($statusCode, $reasonPhrase);
    }

    public function getStatusCode(): int
    {
        return $this->headers->getStatus();
    }

    public function withStatus(int $code, string $reasonPhrase = ''): ResponseInterface
    {
        $new = clone $this;
        $new->headers->setStatus($code, $reasonPhrase);
 
        return $new;
    }

    public function getReasonPhrase(): string
    {
        return $this->headers->getReasonPhrase();
    }

    public function adjustHeaders(): void
    {
        // If a Client chooses to decompress the message body then it MUST also remove the Content-Encoding header and adjust the Content-Length header
        if (strtolower($this->headers->get('Content-Encoding') ?? '') == 'gzip')
        {
            $this->headers->delete('Content-Encoding');
 
            if ($this->headers->has('Content-Length'))
            {
                $size = $this->body->getSize();
                if ($size !== null)
                {
                    $this->headers->set('Content-Length', $size);
                }
                else
                {
                    $this->headers->delete('Content-Length');
                }
            }
        }
 
        // Already dechunked
        if (strtolower($this->headers->get('Transfer-Encoding') ?? '') == 'chunked')
        {
            $this->headers->delete('Transfer-Encoding');
        }
    }
}