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<?php
namespace Bitrix\Main;

use Bitrix\Main\Config;
use Bitrix\Main\Engine;
use Bitrix\Main\Web;

class HttpResponse extends Response
{
	public const STORE_COOKIE_NAME = "STORE_COOKIES";

/** @var \Bitrix\Main\Web\Cookie[] */
	protected $cookies = [];

/** @var Web\HttpHeaders */
	protected $headers;

/** @var \Bitrix\Main\Type\DateTime */
	protected $lastModified;

public function __construct()
	{
		parent::__construct();

$this->setHeaders(new Web\HttpHeaders());
	}

/**
	 * Flushes the content to the output buffer. All following output will be ignored.
	 * @param string $text
	 */
	public function flush($text = '')
	{
		//clear all buffers - the response is responsible alone for its content
		while (@ob_end_clean());

if (function_exists("fastcgi_finish_request"))
		{
			//php-fpm
			$this->writeHeaders();
			$this->writeBody($text);

fastcgi_finish_request();
		}
		else
		{
			//apache handler
			ob_start();

$this->writeBody($text);

$size = ob_get_length();

$this->addHeader('Content-Length', $size);

$this->writeHeaders();

ob_end_flush();
			@ob_flush();
			flush();
		}
	}

/**
	 *	Adds a HTTP header field to the response.
	 *
	 * @param string $name Header field name
	 * @param string $value Header field value
	 * @return $this
	 * @throws ArgumentNullException
	 */
	public function addHeader($name, $value = '')
	{
		if (empty($name))
			throw new ArgumentNullException("name");

$this->getHeaders()->add($name, $value);

return $this;
	}

/**
	 * Sets a collection of HTTP headers.
	 * @param Web\HttpHeaders $headers Headers collection.
	 *
	 * @return $this
	 */
	public function setHeaders(Web\HttpHeaders $headers)
	{
		$this->headers = $headers;

return $this;
	}

/**
	 * Adds a cookie to the response.
	 *
	 * @param Web\Cookie $cookie The cookie.
	 * @param bool $replace Replace an existing cookie or not.
	 * @param bool $checkExpires Check expires value of the cookie or not.
	 * @return $this
	 */
	public function addCookie(Web\Cookie $cookie, $replace = true, $checkExpires = true)
	{
		$key = $cookie->getName().".".$cookie->getDomain().".".$cookie->getPath();
		if($replace || !isset($this->cookies[$key]))
		{
			if($checkExpires && $cookie->getExpires() > 0)
			{
				//it's a persistent cookie; we should check if we're allowed to store persistent cookies
				static $askToStore = null;
				if($askToStore === null)
				{
					$askToStore = Config\Option::get("main", "ask_to_store_cookies");
				}
				if($askToStore === "Y")
				{
					if(Context::getCurrent()->getRequest()->getCookiesMode() !== "Y")
					{
						//user declined to store cookies - we're using session cookies only
						$cookie->setExpires(0);
					}
				}
			}

$this->cookies[$key] = $cookie;
		}
		return $this;
	}

/**
	 * Remembers user's choice about storing persistent cookies.
	 * @param bool $mode
	 */
	public function allowPersistentCookies($mode)
	{
		if($mode === true)
		{
			//persistent cookie to remember
			$cookie = new Web\Cookie(self::STORE_COOKIE_NAME, "Y");
		}
		else
		{
			//session cookie: we're not allowed to store persistent cookies
			$cookie = new Web\Cookie(self::STORE_COOKIE_NAME, "N", 0);
		}
		$this->addCookie($cookie, true, false);
	}

/**
	 * @return Web\Cookie[]
	 */
	public function getCookies()
	{
		return $this->cookies;
	}

/**
	 * @return Web\HttpHeaders
	 */
	public function getHeaders()
	{
		return $this->headers;
	}

/**
	 * Flushes all headers and cookies
	 */
	public function writeHeaders()
	{
		if($this->lastModified !== null)
		{
			$this->flushHeader(array("Last-Modified", gmdate("D, d M Y H:i:s", $this->lastModified->getTimestamp()) . " GMT"));
		}

foreach ($this->getHeaders() as $name => $values)
		{
			if (is_array($values))
			{
				foreach ($values as $value)
				{
					$this->flushHeader([$name, $value]);
				}
			}
			elseif($values !== '')
			{
				$this->flushHeader([$name, $values]);
			}
			else
			{
				$this->flushHeader($name);
			}
		}

$cookiesCrypter = new Web\CookiesCrypter();
		foreach ($this->cookies as $cookie)
		{
			if (!$cookiesCrypter->shouldEncrypt($cookie))
			{
				$this->setCookie($cookie);
			}
			else
			{
				foreach ($cookiesCrypter->encrypt($cookie) as $cryptoCookie)
				{
					$this->setCookie($cryptoCookie);
				}
			}
		}
	}

protected function flushHeader($header)
	{
		if (is_array($header))
		{
			header(sprintf("%s: %s", $header[0], $header[1]));
		}
		else
		{
			header($header);
		}

return $this;
	}

protected function setCookie(Web\Cookie $cookie)
	{
		if ($cookie->getSpread() & Web\Cookie::SPREAD_DOMAIN)
		{
			$params = [
				'expires' => $cookie->getExpires(),
				'path' => $cookie->getPath(),
				'domain' => $cookie->getDomain(),
				'secure' => $cookie->getSecure(),
				'httponly' => $cookie->getHttpOnly(),
			];

if (($sameSite = $cookie->getSameSite()) !== null)
			{
				$params['samesite'] = $sameSite;
			}

setcookie(
				$cookie->getName(),
				$cookie->getValue(),
				$params
			);
		}

return $this;
	}

/**
	 * Sets the HTTP status of the response.
	 *
	 * @param string $status
	 * @return $this
	 */
	public function setStatus($status)
	{
		$httpStatus = Config\Configuration::getValue("http_status");

$cgiMode = (stristr(php_sapi_name(), "cgi") !== false);
		if ($cgiMode && ($httpStatus == null || $httpStatus == false))
		{
			$this->addHeader("Status", $status);
		}
		else
		{
			$httpHeaders = $this->getHeaders();
			$httpHeaders->delete($this->getStatus());

$proto = $this->getServerProtocol();

$this->addHeader("{$proto} {$status}");
		}

return $this;
	}

/**
	 * Returns the HTTP status of the response.
	 * @return int|string|null
	 */
	public function getStatus()
	{
		$cgiStatus = $this->getHeaders()->get('Status');
		if ($cgiStatus)
		{
			return $cgiStatus;
		}

$prefixStatus = strtolower($this->getServerProtocol().' ');
		$prefixStatusLength = strlen($prefixStatus);
		foreach ($this->getHeaders() as $name => $value)
		{
			if (substr(strtolower($name), 0, $prefixStatusLength) === $prefixStatus)
			{
				return $name;
			}
		}

return null;
	}

protected function getServerProtocol()
	{
		$context = Context::getCurrent();
		if ($context !== null)
		{
			$server = $context->getServer();
			if ($server !== null)
			{
				return $server->get("SERVER_PROTOCOL");
			}
		}
		return "HTTP/1.0";
	}

/**
	 * Sets the latest time for the Last-Modified header field.
	 *
	 * @param Type\DateTime $time
	 * @return $this
	 */
	public function setLastModified(Type\DateTime $time)
	{
		if($this->lastModified === null || $time->getTimestamp() > $this->lastModified->getTimestamp())
		{
			$this->lastModified = $time;
		}

return $this;
	}

/**
	 * @param $url
	 * @return Engine\Response\Redirect
	 */
	final public function redirectTo($url): HttpResponse
	{
		$redirectResponse = new Engine\Response\Redirect($url);

return $this->copyHeadersTo($redirectResponse);
	}

public function copyHeadersTo(HttpResponse $response): HttpResponse
	{
		$httpHeaders = $response->getHeaders();

$status = $response->getStatus();
		$previousStatus = $this->getStatus();
		foreach ($this->getHeaders() as $headerName => $values)
		{
			if ($this->shouldIgnoreHeaderToClone($headerName))
			{
				continue;
			}

if ($status && $headerName === $previousStatus)
			{
				continue;
			}

if ($httpHeaders->get($headerName))
			{
				continue;
			}

$httpHeaders->add($headerName, $values);
		}

foreach ($this->getCookies() as $cookie)
		{
			$response->addCookie($cookie, false);
		}

return $response;
	}

private function shouldIgnoreHeaderToClone($headerName)
	{
		return in_array(strtolower($headerName), [
			'content-encoding',
			'content-length',
			'content-type',
		], true);
	}
}

/var/www/axolotl/data/www/b24.axolotl.ru/./public_html/bitrix/modules/main/lib/httpresponse.php