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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
{
const COOKIES_FLAT = 'flat';
const COOKIES_ARRAY = 'array';
const DISPOSITION_ATTACHMENT = 'attachment';
const DISPOSITION_INLINE = 'inline';
protected $computedCacheControl = array();
protected $cookies = array();
protected $headerNames = array();
public function __construct(array $headers = array())
{
parent::__construct($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()
{
$headers = array();
foreach ($this->all() as $name => $value) {
$headers[isset($this->headerNames[$name]) ? $this->headerNames[$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 = array())
{
$this->headerNames = array();
parent::replace($headers);
if (!isset($this->headers['cache-control'])) {
$this->set('Cache-Control', '');
}
if (!isset($this->headers['date'])) {
$this->initDate();
}
}
/**
* {@inheritdoc}
*/
public function all()
{
$headers = parent::all();
foreach ($this->getCookies() as $cookie) {
$headers['set-cookie'][] = (string) $cookie;
}
return $headers;
}
/**
* {@inheritdoc}
*/
public function set($key, $values, $replace = true)
{
$uniqueKey = str_replace('_', '-', strtolower($key));
if ('set-cookie' === $uniqueKey) {
if ($replace) {
$this->cookies = array();
}
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, array('cache-control', 'etag', 'last-modified', 'expires'), true)) {
$computed = $this->computeCacheControlValue();
$this->headers['cache-control'] = array($computed);
$this->headerNames['cache-control'] = 'Cache-Control';
$this->computedCacheControl = $this->parseCacheControl($computed);
}
}
/**
* {@inheritdoc}
*/
public function remove($key)
{
$uniqueKey = str_replace('_', '-', strtolower($key));
unset($this->headerNames[$uniqueKey]);
if ('set-cookie' === $uniqueKey) {
$this->cookies = array();
return;
}
parent::remove($key);
if ('cache-control' === $uniqueKey) {
$this->computedCacheControl = array();
}
if ('date' === $uniqueKey) {
$this->initDate();
}
}
/**
* {@inheritdoc}
*/
public function hasCacheControlDirective($key)
{
return array_key_exists($key, $this->computedCacheControl);
}
/**
* {@inheritdoc}
*/
public function getCacheControlDirective($key)
{
return array_key_exists($key, $this->computedCacheControl) ? $this->computedCacheControl[$key] : null;
}
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.
*
* @param string $name
* @param string $path
* @param string $domain
*/
public function removeCookie($name, $path = '/', $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.
*
* @param string $format
*
* @return Cookie[]
*
* @throws \InvalidArgumentException When the $format is invalid
*/
public function getCookies($format = self::COOKIES_FLAT)
{
if (!\in_array($format, array(self::COOKIES_FLAT, self::COOKIES_ARRAY))) {
throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', array(self::COOKIES_FLAT, self::COOKIES_ARRAY))));
}
if (self::COOKIES_ARRAY === $format) {
return $this->cookies;
}
$flattenedCookies = array();
foreach ($this->cookies as $path) {
foreach ($path as $cookies) {
foreach ($cookies as $cookie) {
$flattenedCookies[] = $cookie;
}
}
}
return $flattenedCookies;
}
/**
* Clears a cookie in the browser.
*
* @param string $name
* @param string $path
* @param string $domain
* @param bool $secure
* @param bool $httpOnly
*/
public function clearCookie($name, $path = '/', $domain = null, $secure = false, $httpOnly = true)
{
$this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly));
}
/**
* Generates a HTTP Content-Disposition field-value.
*
* @param string $disposition One of "inline" or "attachment"
* @param string $filename A unicode string
* @param string $filenameFallback A string containing only ASCII characters that
* is semantically equivalent to $filename. If the filename is already ASCII,
* it can be omitted, or just copied from $filename
*
* @return string A string suitable for use as a Content-Disposition field-value
*
* @throws \InvalidArgumentException
*
* @see RFC 6266
*/
public function makeDisposition($disposition, $filename, $filenameFallback = '')
{
if (!\in_array($disposition, array(self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE))) {
throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
}
if ('' == $filenameFallback) {
$filenameFallback = $filename;
}
// filenameFallback is not ASCII.
if (!preg_match('/^[\x20-\x7e]*$/', $filenameFallback)) {
throw new \InvalidArgumentException('The filename fallback must only contain ASCII characters.');
}
// percent characters aren't safe in fallback.
if (false !== strpos($filenameFallback, '%')) {
throw new \InvalidArgumentException('The filename fallback cannot contain the "%" character.');
}
// path separators aren't allowed in either.
if (false !== strpos($filename, '/') || false !== strpos($filename, '\\') || false !== strpos($filenameFallback, '/') || false !== strpos($filenameFallback, '\\')) {
throw new \InvalidArgumentException('The filename and the fallback cannot contain the "/" and "\\" characters.');
}
$params = array('filename' => $filenameFallback);
if ($filename !== $filenameFallback) {
$params['filename*'] = "utf-8''".rawurlencode($filename);
}
return $disposition.'; '.HeaderUtils::toString($params, ';');
}
/**
* 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 (!$this->cacheControl && !$this->has('ETag') && !$this->has('Last-Modified') && !$this->has('Expires')) {
return 'no-cache, private';
}
if (!$this->cacheControl) {
// conservative by default
return 'private, 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;
}
private function initDate()
{
$now = \DateTime::createFromFormat('U', time());
$now->setTimezone(new \DateTimeZone('UTC'));
$this->set('Date', $now->format('D, d M Y H:i:s').' GMT');
}
}