vendor/symfony/http-foundation/ResponseHeaderBag.php line 220
<?php/** This file is part of the Symfony package.** (c) Fabien Potencier <fabien@symfony.com>** For the full copyright and license information, please view the LICENSE* file that was distributed with this source code.*/namespace Symfony\Component\HttpFoundation;/*** ResponseHeaderBag is a container for Response HTTP headers.** @author Fabien Potencier <fabien@symfony.com>*/class ResponseHeaderBag extends HeaderBag{public const COOKIES_FLAT = 'flat';public const COOKIES_ARRAY = 'array';public const DISPOSITION_ATTACHMENT = 'attachment';public const DISPOSITION_INLINE = 'inline';protected $computedCacheControl = [];protected $cookies = [];protected $headerNames = [];public function __construct(array $headers = []){parent::__construct($headers);if (!isset($this->headers['cache-control'])) {$this->set('Cache-Control', '');}/* RFC2616 - 14.18 says all Responses need to have a Date */if (!isset($this->headers['date'])) {$this->initDate();}}/*** Returns the headers, with original capitalizations.*/public function allPreserveCase(): array{$headers = [];foreach ($this->all() as $name => $value) {$headers[$this->headerNames[$name] ?? $name] = $value;}return $headers;}public function allPreserveCaseWithoutCookies(){$headers = $this->allPreserveCase();if (isset($this->headerNames['set-cookie'])) {unset($headers[$this->headerNames['set-cookie']]);}return $headers;}public function replace(array $headers = []){$this->headerNames = [];parent::replace($headers);if (!isset($this->headers['cache-control'])) {$this->set('Cache-Control', '');}if (!isset($this->headers['date'])) {$this->initDate();}}public function all(string $key = null): array{$headers = parent::all();if (null !== $key) {$key = strtr($key, self::UPPER, self::LOWER);return 'set-cookie' !== $key ? $headers[$key] ?? [] : array_map('strval', $this->getCookies());}foreach ($this->getCookies() as $cookie) {$headers['set-cookie'][] = (string) $cookie;}return $headers;}public function set(string $key, string|array|null $values, bool $replace = true){$uniqueKey = strtr($key, self::UPPER, self::LOWER);if ('set-cookie' === $uniqueKey) {if ($replace) {$this->cookies = [];}foreach ((array) $values as $cookie) {$this->setCookie(Cookie::fromString($cookie));}$this->headerNames[$uniqueKey] = $key;return;}$this->headerNames[$uniqueKey] = $key;parent::set($key, $values, $replace);// ensure the cache-control header has sensible defaultsif (\in_array($uniqueKey, ['cache-control', 'etag', 'last-modified', 'expires'], true) && '' !== $computed = $this->computeCacheControlValue()) {$this->headers['cache-control'] = [$computed];$this->headerNames['cache-control'] = 'Cache-Control';$this->computedCacheControl = $this->parseCacheControl($computed);}}public function remove(string $key){$uniqueKey = strtr($key, self::UPPER, self::LOWER);unset($this->headerNames[$uniqueKey]);if ('set-cookie' === $uniqueKey) {$this->cookies = [];return;}parent::remove($key);if ('cache-control' === $uniqueKey) {$this->computedCacheControl = [];}if ('date' === $uniqueKey) {$this->initDate();}}public function hasCacheControlDirective(string $key): bool{return \array_key_exists($key, $this->computedCacheControl);}public function getCacheControlDirective(string $key): bool|string|null{return $this->computedCacheControl[$key] ?? null;}public function setCookie(Cookie $cookie){$this->cookies[$cookie->getDomain()][$cookie->getPath()][$cookie->getName()] = $cookie;$this->headerNames['set-cookie'] = 'Set-Cookie';}/*** Removes a cookie from the array, but does not unset it in the browser.*/public function removeCookie(string $name, ?string $path = '/', string $domain = null){$path ??= '/';unset($this->cookies[$domain][$path][$name]);if (empty($this->cookies[$domain][$path])) {unset($this->cookies[$domain][$path]);if (empty($this->cookies[$domain])) {unset($this->cookies[$domain]);}}if (empty($this->cookies)) {unset($this->headerNames['set-cookie']);}}/*** Returns an array with all cookies.** @return Cookie[]** @throws \InvalidArgumentException When the $format is invalid*/public function getCookies(string $format = self::COOKIES_FLAT): array{if (!\in_array($format, [self::COOKIES_FLAT, self::COOKIES_ARRAY])) {throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', [self::COOKIES_FLAT, self::COOKIES_ARRAY])));}if (self::COOKIES_ARRAY === $format) {return $this->cookies;}$flattenedCookies = [];foreach ($this->cookies as $path) {foreach ($path as $cookies) {foreach ($cookies as $cookie) {$flattenedCookies[] = $cookie;}}}return $flattenedCookies;}/*** Clears a cookie in the browser.*/public function clearCookie(string $name, ?string $path = '/', string $domain = null, bool $secure = false, bool $httpOnly = true, string $sameSite = null){$this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly, false, $sameSite));}/*** @see HeaderUtils::makeDisposition()*/public function makeDisposition(string $disposition, string $filename, string $filenameFallback = ''){return HeaderUtils::makeDisposition($disposition, $filename, $filenameFallback);}/*** Returns the calculated value of the cache-control header.** This considers several other headers and calculates or modifies the* cache-control header to a sensible, conservative value.*/protected function computeCacheControlValue(): string{if (!$this->cacheControl) {if ($this->has('Last-Modified') || $this->has('Expires')) {return 'private, must-revalidate'; // allows for heuristic expiration (RFC 7234 Section 4.2.2) in the case of "Last-Modified"}// conservative by defaultreturn 'no-cache, private';}$header = $this->getCacheControlHeader();if (isset($this->cacheControl['public']) || isset($this->cacheControl['private'])) {return $header;}// public if s-maxage is defined, private otherwiseif (!isset($this->cacheControl['s-maxage'])) {return $header.', private';}return $header;}private function initDate(): void{$this->set('Date', gmdate('D, d M Y H:i:s').' GMT');}}