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<?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.
*
* @return array An array of headers
*/
public function allPreserveCase()
{
$headers = [];
foreach ($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;
}
/**
* {@inheritdoc}
*/
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();
}
}
/**
* {@inheritdoc}
*/
public function all(string $key = null)
{
$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;
}
/**
* {@inheritdoc}
*/
public function set(string $key, $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, $replace);
// ensure the cache-control header has sensible defaults
if (\in_array($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);
}
}
/**
* {@inheritdoc}
*/
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();
}
}
/**
* {@inheritdoc}
*/
public function hasCacheControlDirective(string $key)
{
return \array_key_exists($key, $this->computedCacheControl);
}
/**
* {@inheritdoc}
*/
public function getCacheControlDirective(string $key)
{
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)
{
if (null === $path) {
$path = '/';
}
unset($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 $format = self::COOKIES_FLAT)
{
if (!\in_array($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, $filenameFallback);
}
/**
* Returns the calculated value of the cache-control header.
*
* This considers several other headers and calculates or modifies the
* cache-control header to a sensible, conservative value.
*
* @return string
*/
protected function computeCacheControlValue()
{
if (!$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 default
return 'no-cache, private';
}
$header = $this->getCacheControlHeader();
if (isset($this->cacheControl['public']) || isset($this->cacheControl['private'])) {
return $header;
}
// public if s-maxage is defined, private otherwise
if (!isset($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');
}
}