nextcloud/lib/public/AppFramework/Http/Response.php

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<?php
/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
*
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* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
*/
/**
* Public interface of ownCloud for apps to use.
* AppFramework\HTTP\Response class
*/
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namespace OCP\AppFramework\Http;
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use OCP\AppFramework\Http;
use OCP\AppFramework\Utility\ITimeFactory;
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/**
* Base class for responses. Also used to just send headers.
*
* It handles headers, HTTP status code, last modified and ETag.
* @since 6.0.0
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*/
class Response {
/**
* Headers - defaults to ['Cache-Control' => 'no-cache, no-store, must-revalidate']
* @var array
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*/
private $headers = [
'Cache-Control' => 'no-cache, no-store, must-revalidate'
];
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/**
* Cookies that will be need to be constructed as header
* @var array
*/
private $cookies = [];
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/**
* HTTP status code - defaults to STATUS OK
* @var int
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*/
private $status = Http::STATUS_OK;
/**
* Last modified date
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* @var \DateTime
*/
private $lastModified;
/**
* ETag
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* @var string
*/
private $ETag;
/** @var ContentSecurityPolicy|null Used Content-Security-Policy */
private $contentSecurityPolicy = null;
/** @var FeaturePolicy */
private $featurePolicy;
/** @var bool */
private $throttled = false;
/** @var array */
private $throttleMetadata = [];
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/**
* @since 17.0.0
*/
public function __construct() {
}
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/**
* Caches the response
* @param int $cacheSeconds the amount of seconds that should be cached
* if 0 then caching will be disabled
* @return $this
* @since 6.0.0 - return value was added in 7.0.0
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*/
public function cacheFor(int $cacheSeconds) {
if ($cacheSeconds > 0) {
$this->addHeader('Cache-Control', 'max-age=' . $cacheSeconds . ', must-revalidate');
// Old scool prama caching
$this->addHeader('Pragma', 'public');
// Set expires header
$expires = new \DateTime();
/** @var ITimeFactory $time */
$time = \OC::$server->query(ITimeFactory::class);
$expires->setTimestamp($time->getTime());
$expires->add(new \DateInterval('PT'.$cacheSeconds.'S'));
$this->addHeader('Expires', $expires->format(\DateTime::RFC2822));
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} else {
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$this->addHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
unset($this->headers['Expires'], $this->headers['Pragma']);
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}
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return $this;
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}
/**
* Adds a new cookie to the response
* @param string $name The name of the cookie
* @param string $value The value of the cookie
* @param \DateTime|null $expireDate Date on that the cookie should expire, if set
* to null cookie will be considered as session
* cookie.
* @return $this
* @since 8.0.0
*/
public function addCookie($name, $value, \DateTime $expireDate = null) {
$this->cookies[$name] = ['value' => $value, 'expireDate' => $expireDate];
return $this;
}
/**
* Set the specified cookies
* @param array $cookies array('foo' => array('value' => 'bar', 'expire' => null))
* @return $this
* @since 8.0.0
*/
public function setCookies(array $cookies) {
$this->cookies = $cookies;
return $this;
}
/**
* Invalidates the specified cookie
* @param string $name
* @return $this
* @since 8.0.0
*/
public function invalidateCookie($name) {
$this->addCookie($name, 'expired', new \DateTime('1971-01-01 00:00'));
return $this;
}
/**
* Invalidates the specified cookies
* @param array $cookieNames array('foo', 'bar')
* @return $this
* @since 8.0.0
*/
public function invalidateCookies(array $cookieNames) {
foreach ($cookieNames as $cookieName) {
$this->invalidateCookie($cookieName);
}
return $this;
}
/**
* Returns the cookies
* @return array
* @since 8.0.0
*/
public function getCookies() {
return $this->cookies;
}
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/**
* Adds a new header to the response that will be called before the render
* function
* @param string $name The name of the HTTP header
* @param string $value The value, null will delete it
* @return $this
* @since 6.0.0 - return value was added in 7.0.0
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*/
public function addHeader($name, $value) {
$name = trim($name); // always remove leading and trailing whitespace
// to be able to reliably check for security
// headers
if (is_null($value)) {
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unset($this->headers[$name]);
} else {
$this->headers[$name] = $value;
}
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return $this;
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}
/**
* Set the headers
* @param array $headers value header pairs
* @return $this
* @since 8.0.0
*/
public function setHeaders(array $headers) {
$this->headers = $headers;
return $this;
}
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/**
* Returns the set headers
* @return array the headers
* @since 6.0.0
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*/
public function getHeaders() {
$mergeWith = [];
if ($this->lastModified) {
$mergeWith['Last-Modified'] =
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$this->lastModified->format(\DateTime::RFC2822);
}
$this->headers['Content-Security-Policy'] = $this->getContentSecurityPolicy()->buildPolicy();
$this->headers['Feature-Policy'] = $this->getFeaturePolicy()->buildPolicy();
if ($this->ETag) {
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$mergeWith['ETag'] = '"' . $this->ETag . '"';
}
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return array_merge($mergeWith, $this->headers);
}
/**
* By default renders no output
* @return string
* @since 6.0.0
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*/
public function render() {
return '';
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}
/**
* Set response status
* @param int $status a HTTP status code, see also the STATUS constants
* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
*/
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public function setStatus($status) {
$this->status = $status;
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return $this;
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}
/**
* Set a Content-Security-Policy
* @param EmptyContentSecurityPolicy $csp Policy to set for the response object
* @return $this
* @since 8.1.0
*/
public function setContentSecurityPolicy(EmptyContentSecurityPolicy $csp) {
$this->contentSecurityPolicy = $csp;
return $this;
}
/**
* Get the currently used Content-Security-Policy
* @return EmptyContentSecurityPolicy|null Used Content-Security-Policy or null if
* none specified.
* @since 8.1.0
*/
public function getContentSecurityPolicy() {
if ($this->contentSecurityPolicy === null) {
$this->setContentSecurityPolicy(new EmptyContentSecurityPolicy());
}
return $this->contentSecurityPolicy;
}
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/**
* @since 17.0.0
*/
public function getFeaturePolicy(): EmptyFeaturePolicy {
if ($this->featurePolicy === null) {
$this->setFeaturePolicy(new EmptyFeaturePolicy());
}
return $this->featurePolicy;
}
/**
* @since 17.0.0
*/
public function setFeaturePolicy(EmptyFeaturePolicy $featurePolicy): self {
$this->featurePolicy = $featurePolicy;
return $this;
}
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/**
* Get response status
* @since 6.0.0
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*/
public function getStatus() {
return $this->status;
}
/**
* Get the ETag
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* @return string the etag
* @since 6.0.0
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*/
public function getETag() {
return $this->ETag;
}
/**
* Get "last modified" date
* @return \DateTime RFC2822 formatted last modified date
* @since 6.0.0
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*/
public function getLastModified() {
return $this->lastModified;
}
/**
* Set the ETag
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* @param string $ETag
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* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
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*/
public function setETag($ETag) {
$this->ETag = $ETag;
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return $this;
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}
/**
* Set "last modified" date
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* @param \DateTime $lastModified
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* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
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*/
public function setLastModified($lastModified) {
$this->lastModified = $lastModified;
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return $this;
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}
/**
* Marks the response as to throttle. Will be throttled when the
* @BruteForceProtection annotation is added.
*
* @param array $metadata
* @since 12.0.0
*/
public function throttle(array $metadata = []) {
$this->throttled = true;
$this->throttleMetadata = $metadata;
}
/**
* Returns the throttle metadata, defaults to empty array
*
* @return array
* @since 13.0.0
*/
public function getThrottleMetadata() {
return $this->throttleMetadata;
}
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/**
* Whether the current response is throttled.
*
* @since 12.0.0
*/
public function isThrottled() {
return $this->throttled;
}
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}