lib/vendor/symfony/http-foundation/ResponseHeaderBag.php

<?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;
 
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', '');
        }
    }
 
    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;
    }
 
    public function replace(array $headers = array())
    {
        $this->headerNames = array();
 
        parent::replace($headers);
 
        if (!isset($this->headers['cache-control'])) {
            $this->set('Cache-Control', '');
        }
    }
 
    public function all()
    {
        $headers = parent::all();
        foreach ($this->getCookies() as $cookie) {
            $headers['set-cookie'][] = (string) $cookie;
        }
 
        return $headers;
    }
 
    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'))) {
            $computed = $this->computeCacheControlValue();
            $this->headers['cache-control'] = array($computed);
            $this->headerNames['cache-control'] = 'Cache-Control';
            $this->computedCacheControl = $this->parseCacheControl($computed);
        }
    }
 
    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();
        }
    }
 
    public function hasCacheControlDirective($key)
    {
        return array_key_exists($key, $this->computedCacheControl);
    }
 
    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';
    }
 
    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']);
        }
    }
 
    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;
    }
 
    public function clearCookie($name, $path = '/', $domain = null, $secure = false, $httpOnly = true)
    {
        $this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly));
    }
 
    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.');
        }
 
        $output = sprintf('%s; filename="%s"', $disposition, str_replace('"', '\\"', $filenameFallback));
 
        if ($filename !== $filenameFallback) {
            $output .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
        }
 
        return $output;
    }
 
    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;
    }
}