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ResponseHeaderBag.php
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ResponseHeaderBag.php
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<?php
namespace Symfony\Component\HttpFoundation;
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* ResponseHeaderBag is a container for Response HTTP headers.
*
* @author Fabien Potencier <fabien.potencier@symfony-project.com>
*/
class ResponseHeaderBag extends HeaderBag
{
protected $computedCacheControl = array();
/**
* {@inheritdoc}
*/
public function replace(array $headers = array())
{
parent::replace($headers);
if (!isset($this->headers['cache-control'])) {
$this->set('cache-control', '');
}
}
/**
* {@inheritdoc}
*/
public function set($key, $values, $replace = true)
{
parent::set($key, $values, $replace);
if ('cache-control' === strtr(strtolower($key), '_', '-')) {
$computed = $this->computeCacheControlValue();
$this->headers['cache-control'] = array($computed);
$this->computedCacheControl = $this->parseCacheControl($computed);
}
}
/**
* {@inheritdoc}
*/
public function delete($key)
{
parent::delete($key);
if ('cache-control' === strtr(strtolower($key), '_', '-')) {
$this->computedCacheControl = array();
}
}
/**
* {@inheritdoc}
*/
public function setCookie($name, $value, $domain = null, $expires = null, $path = '/', $secure = false, $httponly = true)
{
$this->validateCookieName($name, $value);
$cookie = sprintf('%s=%s', $name, urlencode($value));
if (null !== $expires) {
if (is_numeric($expires)) {
$expires = (int) $expires;
} elseif ($expires instanceof \DateTime) {
$expires = $expires->getTimestamp();
} else {
$expires = strtotime($expires);
if (false === $expires || -1 == $expires) {
throw new \InvalidArgumentException(sprintf('The "expires" cookie parameter is not valid.', $expires));
}
}
$cookie .= '; expires='.substr(\DateTime::createFromFormat('U', $expires, new \DateTimeZone('UTC'))->format('D, d-M-Y H:i:s T'), 0, -5);
}
if ($domain) {
$cookie .= '; domain='.$domain;
}
$cookie .= '; path='.$path;
if ($secure) {
$cookie .= '; secure';
}
if ($httponly) {
$cookie .= '; httponly';
}
$this->set('Set-Cookie', $cookie, false);
}
/**
* {@inheritdoc}
*/
public function hasCacheControlDirective($key)
{
return array_key_exists($key, $this->computedCacheControl);
}
/**
* {@inheritdoc}
*/
public function getCacheControlDirective($key)
{
return array_key_exists($key, $this->computedCacheControl) ? $this->computedCacheControl[$key] : null;
}
protected function computeCacheControlValue()
{
if (!$this->cacheControl && !$this->has('ETag') && !$this->has('Last-Modified') && !$this->has('Expires')) {
return 'no-cache';
}
if (!$this->cacheControl) {
// conservative by default
return 'private, max-age=0, must-revalidate';
}
$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;
}
}