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410 lines
9.7 KiB
PHP
410 lines
9.7 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OCP\AppFramework\Http;
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use OCP\AppFramework\Http;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IConfig;
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use OCP\IRequest;
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use Psr\Log\LoggerInterface;
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/**
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* Base class for responses. Also used to just send headers.
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*
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* It handles headers, HTTP status code, last modified and ETag.
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* @since 6.0.0
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* @template S of int
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* @template H of array<string, mixed>
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*/
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class Response {
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/**
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* Headers
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* @var H
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*/
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private $headers;
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/**
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* Cookies that will be need to be constructed as header
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* @var array
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*/
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private $cookies = [];
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/**
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* HTTP status code - defaults to STATUS OK
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* @var S
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*/
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private $status;
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/**
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* Last modified date
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* @var \DateTime
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*/
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private $lastModified;
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/**
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* ETag
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* @var string
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*/
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private $ETag;
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/** @var ContentSecurityPolicy|null Used Content-Security-Policy */
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private $contentSecurityPolicy = null;
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/** @var FeaturePolicy */
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private $featurePolicy;
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/** @var bool */
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private $throttled = false;
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/** @var array */
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private $throttleMetadata = [];
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/**
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* @param S $status
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* @param H $headers
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* @since 17.0.0
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*/
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public function __construct(int $status = Http::STATUS_OK, array $headers = []) {
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$this->setStatus($status);
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$this->setHeaders($headers);
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}
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/**
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* Caches the response
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*
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* @param int $cacheSeconds amount of seconds the response is fresh, 0 to disable cache.
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* @param bool $public whether the page should be cached by public proxy. Usually should be false, unless this is a static resources.
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* @param bool $immutable whether browser should treat the resource as immutable and not ask the server for each page load if the resource changed.
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* @return $this
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* @since 6.0.0 - return value was added in 7.0.0
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*/
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public function cacheFor(int $cacheSeconds, bool $public = false, bool $immutable = false) {
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if ($cacheSeconds > 0) {
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$cacheStore = $public ? 'public' : 'private';
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$this->addHeader('Cache-Control', sprintf('%s, max-age=%s, %s', $cacheStore, $cacheSeconds, ($immutable ? 'immutable' : 'must-revalidate')));
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// Set expires header
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$expires = new \DateTime();
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/** @var ITimeFactory $time */
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$time = \OCP\Server::get(ITimeFactory::class);
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$expires->setTimestamp($time->getTime());
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$expires->add(new \DateInterval('PT' . $cacheSeconds . 'S'));
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$this->addHeader('Expires', $expires->format(\DateTimeInterface::RFC2822));
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} else {
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$this->addHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
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unset($this->headers['Expires']);
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}
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return $this;
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}
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/**
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* Adds a new cookie to the response
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* @param string $name The name of the cookie
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* @param string $value The value of the cookie
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* @param \DateTime|null $expireDate Date on that the cookie should expire, if set
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* to null cookie will be considered as session
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* cookie.
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* @param string $sameSite The samesite value of the cookie. Defaults to Lax. Other possibilities are Strict or None
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* @return $this
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* @since 8.0.0
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*/
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public function addCookie($name, $value, ?\DateTime $expireDate = null, $sameSite = 'Lax') {
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$this->cookies[$name] = ['value' => $value, 'expireDate' => $expireDate, 'sameSite' => $sameSite];
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return $this;
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}
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/**
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* Set the specified cookies
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* @param array $cookies array('foo' => array('value' => 'bar', 'expire' => null))
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* @return $this
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* @since 8.0.0
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*/
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public function setCookies(array $cookies) {
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$this->cookies = $cookies;
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return $this;
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}
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/**
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* Invalidates the specified cookie
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* @param string $name
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* @return $this
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* @since 8.0.0
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*/
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public function invalidateCookie($name) {
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$this->addCookie($name, 'expired', new \DateTime('1971-01-01 00:00'));
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return $this;
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}
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/**
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* Invalidates the specified cookies
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* @param array $cookieNames array('foo', 'bar')
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* @return $this
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* @since 8.0.0
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*/
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public function invalidateCookies(array $cookieNames) {
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foreach ($cookieNames as $cookieName) {
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$this->invalidateCookie($cookieName);
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}
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return $this;
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}
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/**
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* Returns the cookies
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* @return array
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* @since 8.0.0
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*/
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public function getCookies() {
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return $this->cookies;
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}
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/**
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* Adds a new header to the response that will be called before the render
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* function
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* @param string $name The name of the HTTP header
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* @param string $value The value, null will delete it
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* @return $this
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* @since 6.0.0 - return value was added in 7.0.0
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*/
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public function addHeader($name, $value) {
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$name = trim($name); // always remove leading and trailing whitespace
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// to be able to reliably check for security
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// headers
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if ($this->status === Http::STATUS_NOT_MODIFIED
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&& stripos($name, 'x-') === 0) {
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/** @var IConfig $config */
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$config = \OC::$server->get(IConfig::class);
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if ($config->getSystemValueBool('debug', false)) {
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\OC::$server->get(LoggerInterface::class)->error('Setting custom header on a 304 is not supported (Header: {header})', [
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'header' => $name,
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]);
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}
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}
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if (is_null($value)) {
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unset($this->headers[$name]);
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} else {
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$this->headers[$name] = $value;
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}
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return $this;
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}
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/**
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* Set the headers
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* @template NewH as array<string, mixed>
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* @param NewH $headers value header pairs
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* @psalm-this-out static<S, NewH>
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* @return static
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* @since 8.0.0
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*/
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public function setHeaders(array $headers): static {
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/** @psalm-suppress InvalidPropertyAssignmentValue Expected due to @psalm-this-out */
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$this->headers = $headers;
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return $this;
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}
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/**
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* Returns the set headers
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* @return array{X-Request-Id: string, Cache-Control: string, Content-Security-Policy: string, Feature-Policy: string, X-Robots-Tag: string, Last-Modified?: string, ETag?: string, ...H} the headers
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* @since 6.0.0
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*/
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public function getHeaders() {
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/** @var IRequest $request */
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/**
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* @psalm-suppress UndefinedClass
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*/
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$request = \OC::$server->get(IRequest::class);
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$mergeWith = [
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'X-Request-Id' => $request->getId(),
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'Cache-Control' => 'no-cache, no-store, must-revalidate',
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'Content-Security-Policy' => $this->getContentSecurityPolicy()->buildPolicy(),
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'Feature-Policy' => $this->getFeaturePolicy()->buildPolicy(),
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'X-Robots-Tag' => 'noindex, nofollow',
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];
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if ($this->lastModified) {
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$mergeWith['Last-Modified'] = $this->lastModified->format(\DateTimeInterface::RFC2822);
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}
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if ($this->ETag) {
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$mergeWith['ETag'] = '"' . $this->ETag . '"';
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}
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return array_merge($mergeWith, $this->headers);
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}
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/**
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* By default renders no output
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* @return string
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* @since 6.0.0
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*/
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public function render() {
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return '';
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}
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/**
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* Set response status
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* @template NewS as int
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* @param NewS $status a HTTP status code, see also the STATUS constants
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* @psalm-this-out static<NewS, H>
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* @return static
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* @since 6.0.0 - return value was added in 7.0.0
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*/
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public function setStatus($status): static {
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/** @psalm-suppress InvalidPropertyAssignmentValue Expected due to @psalm-this-out */
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$this->status = $status;
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return $this;
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}
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/**
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* Set a Content-Security-Policy
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* @param EmptyContentSecurityPolicy $csp Policy to set for the response object
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* @return $this
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* @since 8.1.0
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*/
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public function setContentSecurityPolicy(EmptyContentSecurityPolicy $csp) {
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$this->contentSecurityPolicy = $csp;
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return $this;
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}
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/**
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* Get the currently used Content-Security-Policy
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* @return EmptyContentSecurityPolicy|null Used Content-Security-Policy or null if
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* none specified.
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* @since 8.1.0
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*/
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public function getContentSecurityPolicy() {
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if ($this->contentSecurityPolicy === null) {
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$this->setContentSecurityPolicy(new EmptyContentSecurityPolicy());
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}
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return $this->contentSecurityPolicy;
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}
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/**
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* @since 17.0.0
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*/
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public function getFeaturePolicy(): EmptyFeaturePolicy {
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if ($this->featurePolicy === null) {
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$this->setFeaturePolicy(new EmptyFeaturePolicy());
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}
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return $this->featurePolicy;
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}
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/**
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* @since 17.0.0
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*/
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public function setFeaturePolicy(EmptyFeaturePolicy $featurePolicy): self {
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$this->featurePolicy = $featurePolicy;
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return $this;
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}
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/**
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* Get response status
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* @since 6.0.0
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* @return S
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*/
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public function getStatus() {
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return $this->status;
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}
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/**
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* Get the ETag
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* @return string the etag
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* @since 6.0.0
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*/
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public function getETag() {
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return $this->ETag;
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}
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/**
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* Get "last modified" date
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* @return \DateTime RFC2822 formatted last modified date
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* @since 6.0.0
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*/
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public function getLastModified() {
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return $this->lastModified;
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}
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/**
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* Set the ETag
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* @param string $ETag
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* @return Response Reference to this object
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* @since 6.0.0 - return value was added in 7.0.0
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*/
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public function setETag($ETag) {
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$this->ETag = $ETag;
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return $this;
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}
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/**
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* Set "last modified" date
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* @param \DateTime $lastModified
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* @return Response Reference to this object
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* @since 6.0.0 - return value was added in 7.0.0
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*/
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public function setLastModified($lastModified) {
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$this->lastModified = $lastModified;
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return $this;
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}
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/**
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* Marks the response as to throttle. Will be throttled when the
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* @BruteForceProtection annotation is added.
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*
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* @param array $metadata
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* @since 12.0.0
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*/
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public function throttle(array $metadata = []) {
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$this->throttled = true;
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$this->throttleMetadata = $metadata;
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}
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/**
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* Returns the throttle metadata, defaults to empty array
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*
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* @return array
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* @since 13.0.0
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*/
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public function getThrottleMetadata() {
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return $this->throttleMetadata;
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}
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/**
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* Whether the current response is throttled.
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*
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* @since 12.0.0
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*/
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public function isThrottled() {
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return $this->throttled;
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}
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}
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