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

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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';
+
+    /**
+     * @var array
+     */
+    protected $computedCacheControl = array();
+
+    /**
+     * @var array
+     */
+    protected $cookies = array();
+
+    /**
+     * @var array
+     */
+    protected $headerNames = array();
+
+    /**
+     * Constructor.
+     *
+     * @param array $headers An array of HTTP headers
+     */
+    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";
+        }
+
+        ksort($this->headerNames);
+
+        return parent::__toString().$cookies;
+    }
+
+    /**
+     * Returns the headers, with original capitalizations.
+     *
+     * @return array An array of headers
+     */
+    public function allPreserveCase()
+    {
+        return array_combine($this->headerNames, $this->headers);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function replace(array $headers = array())
+    {
+        $this->headerNames = array();
+
+        parent::replace($headers);
+
+        if (!isset($this->headers['cache-control'])) {
+            $this->set('Cache-Control', '');
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function set($key, $values, $replace = true)
+    {
+        parent::set($key, $values, $replace);
+
+        $uniqueKey = str_replace('_', '-', strtolower($key));
+        $this->headerNames[$uniqueKey] = $key;
+
+        // ensure the cache-control header has sensible defaults
+        if (in_array($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);
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function remove($key)
+    {
+        parent::remove($key);
+
+        $uniqueKey = str_replace('_', '-', strtolower($key));
+        unset($this->headerNames[$uniqueKey]);
+
+        if ('cache-control' === $uniqueKey) {
+            $this->computedCacheControl = array();
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hasCacheControlDirective($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
+     */
+    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 $domain
+     */
+    public function removeCookie($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]);
+            }
+        }
+    }
+
+    /**
+     * Returns an array with all cookies.
+     *
+     * @param string $format
+     *
+     * @return array
+     *
+     * @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.');
+        }
+
+        $output = sprintf('%s; filename="%s"', $disposition, str_replace('"', '\\"', $filenameFallback));
+
+        if ($filename !== $filenameFallback) {
+            $output .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
+        }
+
+        return $output;
+    }
+
+    /**
+     * Returns the calculated value of the cache-control header.
+     *
+     * This considers several other headers and calculates or modifies the
+     * cache-control header to a sensible, conservative value.
+     *
+     * @return string
+     */
+    protected function computeCacheControlValue()
+    {
+        if (!$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;
+    }
+}