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Current File : /var/www/html/vendor/nette/http/src/Http/Response.php

<?php

/**
 * This file is part of the Nette Framework (https://nette.org)
 * Copyright (c) 2004 David Grudl (https://davidgrudl.com)
 */

namespace Nette\Http;

use Nette;
use Nette\Utils\DateTime;


/**
 * HttpResponse class.
 *
 * @property-read array $headers
 */
class Response implements IResponse
{
	use Nette\SmartObject;

	/** @var string The domain in which the cookie will be available */
	public $cookieDomain = '';

	/** @var string The path in which the cookie will be available */
	public $cookiePath = '/';

	/** @var bool Whether the cookie is available only through HTTPS */
	public $cookieSecure = false;

	/** @var bool Whether the cookie is hidden from client-side */
	public $cookieHttpOnly = true;

	/** @var bool Whether warn on possible problem with data in output buffer */
	public $warnOnBuffer = true;

	/** @var bool  Send invisible garbage for IE 6? */
	private static $fixIE = true;

	/** @var int HTTP response code */
	private $code = self::S200_OK;


	public function __construct()
	{
		if (is_int($code = http_response_code())) {
			$this->code = $code;
		}
	}


	/**
	 * Sets HTTP response code.
	 * @param  int
	 * @param  string
	 * @return static
	 * @throws Nette\InvalidArgumentException  if code is invalid
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function setCode($code, $reason = null)
	{
		$code = (int) $code;
		if ($code < 100 || $code > 599) {
			throw new Nette\InvalidArgumentException("Bad HTTP response '$code'.");
		}
		self::checkHeaders();
		$this->code = $code;

		static $hasReason = [ // hardcoded in PHP
			100, 101,
			200, 201, 202, 203, 204, 205, 206,
			300, 301, 302, 303, 304, 305, 307, 308,
			400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 416, 417, 426, 428, 429, 431,
			500, 501, 502, 503, 504, 505, 506, 511,
		];
		if ($reason || !in_array($code, $hasReason, true)) {
			$protocol = isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.1';
			header("$protocol $code " . ($reason ?: 'Unknown status'));
		} else {
			http_response_code($code);
		}
		return $this;
	}


	/**
	 * Returns HTTP response code.
	 * @return int
	 */
	public function getCode()
	{
		return $this->code;
	}


	/**
	 * Sends a HTTP header and replaces a previous one.
	 * @param  string  header name
	 * @param  string  header value
	 * @return static
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function setHeader($name, $value)
	{
		self::checkHeaders();
		if ($value === null) {
			header_remove($name);
		} elseif (strcasecmp($name, 'Content-Length') === 0 && ini_get('zlib.output_compression')) {
			// ignore, PHP bug #44164
		} else {
			header($name . ': ' . $value, true, $this->code);
		}
		return $this;
	}


	/**
	 * Adds HTTP header.
	 * @param  string  header name
	 * @param  string  header value
	 * @return static
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function addHeader($name, $value)
	{
		self::checkHeaders();
		header($name . ': ' . $value, false, $this->code);
		return $this;
	}


	/**
	 * Sends a Content-type HTTP header.
	 * @param  string  mime-type
	 * @param  string  charset
	 * @return static
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function setContentType($type, $charset = null)
	{
		$this->setHeader('Content-Type', $type . ($charset ? '; charset=' . $charset : ''));
		return $this;
	}


	/**
	 * Redirects to a new URL. Note: call exit() after it.
	 * @param  string  URL
	 * @param  int     HTTP code
	 * @return void
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function redirect($url, $code = self::S302_FOUND)
	{
		$this->setCode($code);
		$this->setHeader('Location', $url);
		if (preg_match('#^https?:|^\s*+[a-z0-9+.-]*+[^:]#i', $url)) {
			$escapedUrl = htmlspecialchars($url, ENT_IGNORE | ENT_QUOTES, 'UTF-8');
			echo "<h1>Redirect</h1>\n\n<p><a href=\"$escapedUrl\">Please click here to continue</a>.</p>";
		}
	}


	/**
	 * Sets the number of seconds before a page cached on a browser expires.
	 * @param  string|int|\DateTimeInterface  time, value 0 means "must-revalidate"
	 * @return static
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function setExpiration($time)
	{
		$this->setHeader('Pragma', null);
		if (!$time) { // no cache
			$this->setHeader('Cache-Control', 's-maxage=0, max-age=0, must-revalidate');
			$this->setHeader('Expires', 'Mon, 23 Jan 1978 10:00:00 GMT');
			return $this;
		}

		$time = DateTime::from($time);
		$this->setHeader('Cache-Control', 'max-age=' . ($time->format('U') - time()));
		$this->setHeader('Expires', Helpers::formatDate($time));
		return $this;
	}


	/**
	 * Checks if headers have been sent.
	 * @return bool
	 */
	public function isSent()
	{
		return headers_sent();
	}


	/**
	 * Returns value of an HTTP header.
	 * @param  string
	 * @param  string|null
	 * @return string|null
	 */
	public function getHeader($header, $default = null)
	{
		$header .= ':';
		$len = strlen($header);
		foreach (headers_list() as $item) {
			if (strncasecmp($item, $header, $len) === 0) {
				return ltrim(substr($item, $len));
			}
		}
		return $default;
	}


	/**
	 * Returns a list of headers to sent.
	 * @return array (name => value)
	 */
	public function getHeaders()
	{
		$headers = [];
		foreach (headers_list() as $header) {
			$a = strpos($header, ':');
			$headers[substr($header, 0, $a)] = (string) substr($header, $a + 2);
		}
		return $headers;
	}


	/**
	 * @deprecated
	 */
	public static function date($time = null)
	{
		trigger_error('Method date() is deprecated, use Nette\Http\Helpers::formatDate() instead.', E_USER_DEPRECATED);
		return Helpers::formatDate($time);
	}


	public function __destruct()
	{
		if (
			self::$fixIE
			&& isset($_SERVER['HTTP_USER_AGENT'])
			&& strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE ') !== false
			&& in_array($this->code, [400, 403, 404, 405, 406, 408, 409, 410, 500, 501, 505], true)
			&& preg_match('#^text/html(?:;|$)#', $this->getHeader('Content-Type'))
		) {
			echo Nette\Utils\Random::generate(2e3, " \t\r\n"); // sends invisible garbage for IE
			self::$fixIE = false;
		}
	}


	/**
	 * Sends a cookie.
	 * @param  string name of the cookie
	 * @param  string value
	 * @param  string|int|\DateTimeInterface  expiration time, value 0 means "until the browser is closed"
	 * @param  string
	 * @param  string
	 * @param  bool
	 * @param  bool
	 * @param  string
	 * @return static
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function setCookie($name, $value, $time, $path = null, $domain = null, $secure = null, $httpOnly = null, $sameSite = null)
	{
		self::checkHeaders();
		$options = [
			'expires' => $time ? (int) DateTime::from($time)->format('U') : 0,
			'path' => $path === null ? $this->cookiePath : (string) $path,
			'domain' => $domain === null ? $this->cookieDomain : (string) $domain,
			'secure' => $secure === null ? $this->cookieSecure : (bool) $secure,
			'httponly' => $httpOnly === null ? $this->cookieHttpOnly : (bool) $httpOnly,
			'samesite' => (string) $sameSite,
		];
		if (PHP_VERSION_ID >= 70300) {
			setcookie($name, $value, $options);
		} else {
			setcookie(
				$name,
				$value,
				$options['expires'],
				$options['path'] . ($sameSite ? "; SameSite=$sameSite" : ''),
				$options['domain'],
				$options['secure'],
				$options['httponly']
			);
		}
		return $this;
	}


	/**
	 * Deletes a cookie.
	 * @param  string name of the cookie.
	 * @param  string
	 * @param  string
	 * @param  bool
	 * @return void
	 * @throws Nette\InvalidStateException  if HTTP headers have been sent
	 */
	public function deleteCookie($name, $path = null, $domain = null, $secure = null)
	{
		$this->setCookie($name, false, 0, $path, $domain, $secure);
	}


	private function checkHeaders()
	{
		if (PHP_SAPI === 'cli') {
		} elseif (headers_sent($file, $line)) {
			throw new Nette\InvalidStateException('Cannot send header after HTTP headers have been sent' . ($file ? " (output started at $file:$line)." : '.'));

		} elseif ($this->warnOnBuffer && ob_get_length() && !array_filter(ob_get_status(true), function ($i) { return !$i['chunk_size']; })) {
			trigger_error('Possible problem: you are sending a HTTP header while already having some data in output buffer. Try Tracy\OutputDebugger or start session earlier.');
		}
	}
}

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