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ResponseHeaderBag.php
001 <?php
002
003 /*
004 * This file is part of the Symfony package.
005 *
006 * (c) Fabien Potencier <fabien@symfony.com>
007 *
008 * For the full copyright and license information, please view the LICENSE
009 * file that was distributed with this source code.
010 */
011
012 namespace Symfony\Component\HttpFoundation;
013
014 /**
015 * ResponseHeaderBag is a container for Response HTTP headers.
016 *
017 * @author Fabien Potencier <fabien@symfony.com>
018 */
019 class ResponseHeaderBag extends HeaderBag
020 {
021 const COOKIES_FLAT = 'flat';
022 const COOKIES_ARRAY = 'array';
023
024 const DISPOSITION_ATTACHMENT = 'attachment';
025 const DISPOSITION_INLINE = 'inline';
026
027 protected $computedCacheControl = [];
028 protected $cookies = [];
029 protected $headerNames = [];
030
031 public function __construct(array $headers = [])
032 {
033 parent::__construct($headers);
034
035 if (!isset($this->headers['cache-control'])) {
036 $this->set('Cache-Control', '');
037 }
038
039 /* RFC2616 - 14.18 says all Responses need to have a Date */
040 if (!isset($this->headers['date'])) {
041 $this->initDate();
042 }
043 }
044
045 /**
046 * Returns the headers, with original capitalizations.
047 *
048 * @return array An array of headers
049 */
050 public function allPreserveCase()
051 {
052 $headers = [];
053 foreach ($this->all() as $name => $value) {
054 $headers[isset($this->headerNames[$name]) ? $this->headerNames[$name] : $name] = $value;
055 }
056
057 return $headers;
058 }
059
060 public function allPreserveCaseWithoutCookies()
061 {
062 $headers = $this->allPreserveCase();
063 if (isset($this->headerNames['set-cookie'])) {
064 unset($headers[$this->headerNames['set-cookie']]);
065 }
066
067 return $headers;
068 }
069
070 /**
071 * {@inheritdoc}
072 */
073 public function replace(array $headers = [])
074 {
075 $this->headerNames = [];
076
077 parent::replace($headers);
078
079 if (!isset($this->headers['cache-control'])) {
080 $this->set('Cache-Control', '');
081 }
082
083 if (!isset($this->headers['date'])) {
084 $this->initDate();
085 }
086 }
087
088 /**
089 * {@inheritdoc}
090 */
091 public function all()
092 {
093 $headers = parent::all();
094 foreach ($this->getCookies() as $cookie) {
095 $headers['set-cookie'][] = (string) $cookie;
096 }
097
098 return $headers;
099 }
100
101 /**
102 * {@inheritdoc}
103 */
104 public function set($key, $values, $replace = true)
105 {
106 $uniqueKey = str_replace('_', '-', strtolower($key));
107
108 if ('set-cookie' === $uniqueKey) {
109 if ($replace) {
110 $this->cookies = [];
111 }
112 foreach ((array) $values as $cookie) {
113 $this->setCookie(Cookie::fromString($cookie));
114 }
115 $this->headerNames[$uniqueKey] = $key;
116
117 return;
118 }
119
120 $this->headerNames[$uniqueKey] = $key;
121
122 parent::set($key, $values, $replace);
123
124 // ensure the cache-control header has sensible defaults
125 if (\in_array($uniqueKey, ['cache-control', 'etag', 'last-modified', 'expires'], true)) {
126 $computed = $this->computeCacheControlValue();
127 $this->headers['cache-control'] = [$computed];
128 $this->headerNames['cache-control'] = 'Cache-Control';
129 $this->computedCacheControl = $this->parseCacheControl($computed);
130 }
131 }
132
133 /**
134 * {@inheritdoc}
135 */
136 public function remove($key)
137 {
138 $uniqueKey = str_replace('_', '-', strtolower($key));
139 unset($this->headerNames[$uniqueKey]);
140
141 if ('set-cookie' === $uniqueKey) {
142 $this->cookies = [];
143
144 return;
145 }
146
147 parent::remove($key);
148
149 if ('cache-control' === $uniqueKey) {
150 $this->computedCacheControl = [];
151 }
152
153 if ('date' === $uniqueKey) {
154 $this->initDate();
155 }
156 }
157
158 /**
159 * {@inheritdoc}
160 */
161 public function hasCacheControlDirective($key)
162 {
163 return \array_key_exists($key, $this->computedCacheControl);
164 }
165
166 /**
167 * {@inheritdoc}
168 */
169 public function getCacheControlDirective($key)
170 {
171 return \array_key_exists($key, $this->computedCacheControl) ? $this->computedCacheControl[$key] : null;
172 }
173
174 public function setCookie(Cookie $cookie)
175 {
176 $this->cookies[$cookie->getDomain()][$cookie->getPath()][$cookie->getName()] = $cookie;
177 $this->headerNames['set-cookie'] = 'Set-Cookie';
178 }
179
180 /**
181 * Removes a cookie from the array, but does not unset it in the browser.
182 *
183 * @param string $name
184 * @param string $path
185 * @param string $domain
186 */
187 public function removeCookie($name, $path = '/', $domain = null)
188 {
189 if (null === $path) {
190 $path = '/';
191 }
192
193 unset($this->cookies[$domain][$path][$name]);
194
195 if (empty($this->cookies[$domain][$path])) {
196 unset($this->cookies[$domain][$path]);
197
198 if (empty($this->cookies[$domain])) {
199 unset($this->cookies[$domain]);
200 }
201 }
202
203 if (empty($this->cookies)) {
204 unset($this->headerNames['set-cookie']);
205 }
206 }
207
208 /**
209 * Returns an array with all cookies.
210 *
211 * @param string $format
212 *
213 * @return Cookie[]
214 *
215 * @throws \InvalidArgumentException When the $format is invalid
216 */
217 public function getCookies($format = self::COOKIES_FLAT)
218 {
219 if (!\in_array($format, [self::COOKIES_FLAT, self::COOKIES_ARRAY])) {
220 throw new \InvalidArgumentException(sprintf('Format "%s" invalid (%s).', $format, implode(', ', [self::COOKIES_FLAT, self::COOKIES_ARRAY])));
221 }
222
223 if (self::COOKIES_ARRAY === $format) {
224 return $this->cookies;
225 }
226
227 $flattenedCookies = [];
228 foreach ($this->cookies as $path) {
229 foreach ($path as $cookies) {
230 foreach ($cookies as $cookie) {
231 $flattenedCookies[] = $cookie;
232 }
233 }
234 }
235
236 return $flattenedCookies;
237 }
238
239 /**
240 * Clears a cookie in the browser.
241 *
242 * @param string $name
243 * @param string $path
244 * @param string $domain
245 * @param bool $secure
246 * @param bool $httpOnly
247 * @param string $sameSite
248 */
249 public function clearCookie($name, $path = '/', $domain = null, $secure = false, $httpOnly = true/*, $sameSite = null*/)
250 {
251 $sameSite = \func_num_args() > 5 ? func_get_arg(5) : null;
252
253 $this->setCookie(new Cookie($name, null, 1, $path, $domain, $secure, $httpOnly, false, $sameSite));
254 }
255
256 /**
257 * Generates a HTTP Content-Disposition field-value.
258 *
259 * @param string $disposition One of "inline" or "attachment"
260 * @param string $filename A unicode string
261 * @param string $filenameFallback A string containing only ASCII characters that
262 * is semantically equivalent to $filename. If the filename is already ASCII,
263 * it can be omitted, or just copied from $filename
264 *
265 * @return string A string suitable for use as a Content-Disposition field-value
266 *
267 * @throws \InvalidArgumentException
268 *
269 * @see RFC 6266
270 */
271 public function makeDisposition($disposition, $filename, $filenameFallback = '')
272 {
273 if (!\in_array($disposition, [self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE])) {
274 throw new \InvalidArgumentException(sprintf('The disposition must be either "%s" or "%s".', self::DISPOSITION_ATTACHMENT, self::DISPOSITION_INLINE));
275 }
276
277 if ('' == $filenameFallback) {
278 $filenameFallback = $filename;
279 }
280
281 // filenameFallback is not ASCII.
282 if (!preg_match('/^[\x20-\x7e]*$/', $filenameFallback)) {
283 throw new \InvalidArgumentException('The filename fallback must only contain ASCII characters.');
284 }
285
286 // percent characters aren't safe in fallback.
287 if (false !== strpos($filenameFallback, '%')) {
288 throw new \InvalidArgumentException('The filename fallback cannot contain the "%" character.');
289 }
290
291 // path separators aren't allowed in either.
292 if (false !== strpos($filename, '/') || false !== strpos($filename, '\\') || false !== strpos($filenameFallback, '/') || false !== strpos($filenameFallback, '\\')) {
293 throw new \InvalidArgumentException('The filename and the fallback cannot contain the "/" and "\\" characters.');
294 }
295
296 $output = sprintf('%s; filename="%s"', $disposition, str_replace('"', '\\"', $filenameFallback));
297
298 if ($filename !== $filenameFallback) {
299 $output .= sprintf("; filename*=utf-8''%s", rawurlencode($filename));
300 }
301
302 return $output;
303 }
304
305 /**
306 * Returns the calculated value of the cache-control header.
307 *
308 * This considers several other headers and calculates or modifies the
309 * cache-control header to a sensible, conservative value.
310 *
311 * @return string
312 */
313 protected function computeCacheControlValue()
314 {
315 if (!$this->cacheControl) {
316 if ($this->has('Last-Modified') || $this->has('Expires')) {
317 return 'private, must-revalidate'; // allows for heuristic expiration (RFC 7234 Section 4.2.2) in the case of "Last-Modified"
318 }
319
320 // conservative by default
321 return 'no-cache, private';
322 }
323
324 $header = $this->getCacheControlHeader();
325 if (isset($this->cacheControl['public']) || isset($this->cacheControl['private'])) {
326 return $header;
327 }
328
329 // public if s-maxage is defined, private otherwise
330 if (!isset($this->cacheControl['s-maxage'])) {
331 return $header.', private';
332 }
333
334 return $header;
335 }
336
337 private function initDate()
338 {
339 $now = \DateTime::createFromFormat('U', time());
340 $now->setTimezone(new \DateTimeZone('UTC'));
341 $this->set('Date', $now->format('D, d M Y H:i:s').' GMT');
342 }
343 }
344