diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/HttpFoundation/ResponseHeaderBag.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,234 @@
+<?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>
+ *
+ * @api
+ */
+class ResponseHeaderBag extends HeaderBag
+{
+    const COOKIES_FLAT  = 'flat';
+    const COOKIES_ARRAY = 'array';
+
+    protected $computedCacheControl = array();
+    protected $cookies              = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array $headers An array of HTTP headers
+     *
+     * @api
+     */
+    public function __construct(array $headers = array())
+    {
+        parent::__construct($headers);
+
+        if (!isset($this->headers['cache-control'])) {
+            $this->set('cache-control', '');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __toString()
+    {
+        $cookies = '';
+        foreach ($this->getCookies() as $cookie) {
+            $cookies .= 'Set-Cookie: '.$cookie."\r\n";
+        }
+
+        return parent::__toString().$cookies;
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @api
+     */
+    public function replace(array $headers = array())
+    {
+        parent::replace($headers);
+
+        if (!isset($this->headers['cache-control'])) {
+            $this->set('cache-control', '');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @api
+     */
+    public function set($key, $values, $replace = true)
+    {
+        parent::set($key, $values, $replace);
+
+        // ensure the cache-control header has sensible defaults
+        if (in_array(strtr(strtolower($key), '_', '-'), array('cache-control', 'etag', 'last-modified', 'expires'))) {
+            $computed = $this->computeCacheControlValue();
+            $this->headers['cache-control'] = array($computed);
+            $this->computedCacheControl = $this->parseCacheControl($computed);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @api
+     */
+    public function remove($key)
+    {
+        parent::remove($key);
+
+        if ('cache-control' === strtr(strtolower($key), '_', '-')) {
+            $this->computedCacheControl = array();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasCacheControlDirective($key)
+    {
+        return array_key_exists($key, $this->computedCacheControl);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getCacheControlDirective($key)
+    {
+        return array_key_exists($key, $this->computedCacheControl) ? $this->computedCacheControl[$key] : null;
+    }
+
+    /**
+     * Sets a cookie.
+     *
+     * @param Cookie $cookie
+     * @return void
+     *
+     * @api
+     */
+    public function setCookie(Cookie $cookie)
+    {
+        $this->cookies[$cookie->getDomain()][$cookie->getPath()][$cookie->getName()] = $cookie;
+    }
+
+    /**
+     * Removes a cookie from the array, but does not unset it in the browser
+     *
+     * @param string $name
+     * @param string $path
+     * @param string $domain
+     * @return void
+     *
+     * @api
+     */
+    public function removeCookie($name, $path = null, $domain = null)
+    {
+        unset($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]);
+            }
+        }
+    }
+
+    /**
+     * Returns an array with all cookies
+     *
+     * @param string $format
+     *
+     * @throws \InvalidArgumentException When the $format is invalid
+     *
+     * @return array
+     *
+     * @api
+     */
+    public function getCookies($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 $domain
+     * @return void
+     *
+     * @api
+     */
+    public function clearCookie($name, $path = null, $domain = null)
+    {
+        $this->setCookie(new Cookie($name, null, 1, $path, $domain));
+    }
+
+    /**
+     * Returns the calculated value of the cache-control header.
+     *
+     * This considers several other headers and calculates or modifies the
+     * cache-control header to a sensible, conservative value.
+     *
+     * @return string
+     */
+    protected function computeCacheControlValue()
+    {
+        if (!$this->cacheControl && !$this->has('ETag') && !$this->has('Last-Modified') && !$this->has('Expires')) {
+            return 'no-cache';
+        }
+
+        if (!$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;
+    }
+}