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vendor/symfony/http-foundation/HeaderBag.php
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295
vendor/symfony/http-foundation/HeaderBag.php
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<?php
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/*
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* This file is part of the Symfony package.
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*
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* (c) Fabien Potencier <fabien@symfony.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Symfony\Component\HttpFoundation;
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/**
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* HeaderBag is a container for HTTP headers.
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*
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* @author Fabien Potencier <fabien@symfony.com>
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*
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* @implements \IteratorAggregate<string, list<string|null>>
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*/
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class HeaderBag implements \IteratorAggregate, \Countable
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{
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protected const UPPER = '_ABCDEFGHIJKLMNOPQRSTUVWXYZ';
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protected const LOWER = '-abcdefghijklmnopqrstuvwxyz';
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/**
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* @var array<string, list<string|null>>
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*/
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protected $headers = [];
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protected $cacheControl = [];
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public function __construct(array $headers = [])
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{
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foreach ($headers as $key => $values) {
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$this->set($key, $values);
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}
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}
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/**
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* Returns the headers as a string.
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*
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* @return string
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*/
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public function __toString()
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{
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if (!$headers = $this->all()) {
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return '';
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}
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ksort($headers);
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$max = max(array_map('strlen', array_keys($headers))) + 1;
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$content = '';
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foreach ($headers as $name => $values) {
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$name = ucwords($name, '-');
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foreach ($values as $value) {
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$content .= sprintf("%-{$max}s %s\r\n", $name.':', $value);
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}
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}
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return $content;
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}
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/**
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* Returns the headers.
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*
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* @param string|null $key The name of the headers to return or null to get them all
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*
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* @return array<string, array<int, string|null>>|array<int, string|null>
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*/
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public function all(string $key = null)
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{
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if (null !== $key) {
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return $this->headers[strtr($key, self::UPPER, self::LOWER)] ?? [];
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}
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return $this->headers;
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}
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/**
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* Returns the parameter keys.
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*
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* @return string[]
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*/
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public function keys()
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{
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return array_keys($this->all());
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}
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/**
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* Replaces the current HTTP headers by a new set.
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*/
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public function replace(array $headers = [])
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{
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$this->headers = [];
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$this->add($headers);
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}
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/**
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* Adds new headers the current HTTP headers set.
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*/
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public function add(array $headers)
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{
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foreach ($headers as $key => $values) {
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$this->set($key, $values);
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}
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}
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/**
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* Returns the first header by name or the default one.
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*
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* @return string|null
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*/
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public function get(string $key, string $default = null)
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{
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$headers = $this->all($key);
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if (!$headers) {
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return $default;
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}
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if (null === $headers[0]) {
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return null;
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}
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return (string) $headers[0];
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}
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/**
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* Sets a header by name.
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*
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* @param string|string[]|null $values The value or an array of values
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* @param bool $replace Whether to replace the actual value or not (true by default)
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*/
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public function set(string $key, $values, bool $replace = true)
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{
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$key = strtr($key, self::UPPER, self::LOWER);
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if (\is_array($values)) {
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$values = array_values($values);
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if (true === $replace || !isset($this->headers[$key])) {
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$this->headers[$key] = $values;
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} else {
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$this->headers[$key] = array_merge($this->headers[$key], $values);
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}
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} else {
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if (true === $replace || !isset($this->headers[$key])) {
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$this->headers[$key] = [$values];
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} else {
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$this->headers[$key][] = $values;
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}
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}
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if ('cache-control' === $key) {
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$this->cacheControl = $this->parseCacheControl(implode(', ', $this->headers[$key]));
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}
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}
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/**
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* Returns true if the HTTP header is defined.
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*
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* @return bool
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*/
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public function has(string $key)
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{
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return \array_key_exists(strtr($key, self::UPPER, self::LOWER), $this->all());
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}
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/**
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* Returns true if the given HTTP header contains the given value.
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*
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* @return bool
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*/
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public function contains(string $key, string $value)
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{
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return \in_array($value, $this->all($key));
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}
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/**
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* Removes a header.
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*/
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public function remove(string $key)
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{
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$key = strtr($key, self::UPPER, self::LOWER);
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unset($this->headers[$key]);
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if ('cache-control' === $key) {
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$this->cacheControl = [];
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}
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}
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/**
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* Returns the HTTP header value converted to a date.
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*
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* @return \DateTimeInterface|null
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*
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* @throws \RuntimeException When the HTTP header is not parseable
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*/
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public function getDate(string $key, \DateTime $default = null)
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{
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if (null === $value = $this->get($key)) {
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return $default;
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}
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if (false === $date = \DateTime::createFromFormat(\DATE_RFC2822, $value)) {
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throw new \RuntimeException(sprintf('The "%s" HTTP header is not parseable (%s).', $key, $value));
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}
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return $date;
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}
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/**
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* Adds a custom Cache-Control directive.
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*
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* @param bool|string $value The Cache-Control directive value
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*/
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public function addCacheControlDirective(string $key, $value = true)
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{
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$this->cacheControl[$key] = $value;
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$this->set('Cache-Control', $this->getCacheControlHeader());
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}
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/**
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* Returns true if the Cache-Control directive is defined.
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*
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* @return bool
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*/
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public function hasCacheControlDirective(string $key)
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{
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return \array_key_exists($key, $this->cacheControl);
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}
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/**
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* Returns a Cache-Control directive value by name.
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*
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* @return bool|string|null
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*/
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public function getCacheControlDirective(string $key)
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{
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return $this->cacheControl[$key] ?? null;
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}
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/**
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* Removes a Cache-Control directive.
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*/
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public function removeCacheControlDirective(string $key)
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{
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unset($this->cacheControl[$key]);
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$this->set('Cache-Control', $this->getCacheControlHeader());
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}
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/**
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* Returns an iterator for headers.
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*
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* @return \ArrayIterator<string, list<string|null>>
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*/
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#[\ReturnTypeWillChange]
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public function getIterator()
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{
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return new \ArrayIterator($this->headers);
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}
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/**
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* Returns the number of headers.
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*
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* @return int
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*/
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#[\ReturnTypeWillChange]
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public function count()
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{
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return \count($this->headers);
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}
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protected function getCacheControlHeader()
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{
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ksort($this->cacheControl);
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return HeaderUtils::toString($this->cacheControl, ',');
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}
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/**
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* Parses a Cache-Control HTTP header.
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*
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* @return array
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*/
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protected function parseCacheControl(string $header)
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{
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$parts = HeaderUtils::split($header, ',=');
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return HeaderUtils::combine($parts);
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}
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}
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