lib/public/AppFramework/Http/Response.php
<?php
/**
* @author Bernhard Posselt <dev@bernhard-posselt.com>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Thomas Tanghus <thomas@tanghus.net>
*
* @copyright Copyright (c) 2018, ownCloud GmbH
* @license AGPL-3.0
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* 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/>
*
*/
/**
* Public interface of ownCloud for apps to use.
* AppFramework\HTTP\Response class
*/
namespace OCP\AppFramework\Http;
use OCP\AppFramework\Http;
/**
* Base class for responses. Also used to just send headers.
*
* It handles headers, HTTP status code, last modified and ETag.
* @since 6.0.0
*/
class Response {
/**
* Headers - defaults to ['Cache-Control' => 'no-cache, no-store, must-revalidate']
* @var array
*/
private $headers = [
'Cache-Control' => 'no-cache, no-store, must-revalidate'
];
/**
* Cookies that will be need to be constructed as header
* @var array
*/
private $cookies = [];
/**
* HTTP status code - defaults to STATUS OK
* @var int
*/
private $status = Http::STATUS_OK;
/**
* Last modified date
* @var \DateTime
*/
private $lastModified;
/**
* ETag
* @var string
*/
private $ETag;
/** @var ContentSecurityPolicy|null Used Content-Security-Policy */
private $contentSecurityPolicy = null;
/**
* Caches the response
* @param int $cacheSeconds the amount of seconds that should be cached
* if 0 then caching will be disabled
* @return $this
* @since 6.0.0 - return value was added in 7.0.0
*/
public function cacheFor($cacheSeconds) {
if ($cacheSeconds > 0) {
$this->addHeader('Cache-Control', 'max-age=' . $cacheSeconds .
', must-revalidate');
} else {
$this->addHeader('Cache-Control', 'no-cache, no-store, must-revalidate');
}
return $this;
}
/**
* 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;
}
/**
* 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 $this
* @since 6.0.0 - return value was added in 7.0.0
*/
public function addHeader($name, $value) {
$name = \trim($name); // always remove leading and trailing whitespace
// to be able to reliably check for security
// headers
if ($value === null) {
unset($this->headers[$name]);
} else {
$this->headers[$name] = $value;
}
return $this;
}
/**
* 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;
}
/**
* Returns the set headers
* @return array the headers
* @since 6.0.0
*/
public function getHeaders() {
$mergeWith = [];
if ($this->lastModified) {
$mergeWith['Last-Modified'] =
$this->lastModified->format(\DateTime::RFC2822);
}
// Build Content-Security-Policy and use default if none has been specified
if ($this->contentSecurityPolicy === null) {
$this->setContentSecurityPolicy(new ContentSecurityPolicy());
}
$this->headers['Content-Security-Policy'] = $this->contentSecurityPolicy->buildPolicy();
if ($this->ETag) {
$mergeWith['ETag'] = '"' . $this->ETag . '"';
}
return \array_merge($mergeWith, $this->headers);
}
/**
* Return a string to be used in the body of an HTTP response.
* By default returns null and so renders no output.
* Can be overridden to provide the desired response body content.
*
* @return string|null
* @since 6.0.0
*/
public function render() {
return null;
}
/**
* Set response status
* @param int $status a HTTP status code, see also the STATUS constants
* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
*/
public function setStatus($status) {
$this->status = $status;
return $this;
}
/**
* Set a Content-Security-Policy
* @param ContentSecurityPolicy $csp Policy to set for the response object
* @return $this
* @since 8.1.0
*/
public function setContentSecurityPolicy(ContentSecurityPolicy $csp) {
$this->contentSecurityPolicy = $csp;
return $this;
}
/**
* Get the currently used Content-Security-Policy
* @return ContentSecurityPolicy|null Used Content-Security-Policy or null if
* none specified.
* @since 8.1.0
*/
public function getContentSecurityPolicy() {
return $this->contentSecurityPolicy;
}
/**
* Get response status
* @since 6.0.0
*/
public function getStatus() {
return $this->status;
}
/**
* Get the ETag
* @return string the etag
* @since 6.0.0
*/
public function getETag() {
return $this->ETag;
}
/**
* Get "last modified" date
* @return \DateTime RFC2822 formatted last modified date
* @since 6.0.0
*/
public function getLastModified() {
return $this->lastModified;
}
/**
* Set the ETag
* @param string $ETag
* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
*/
public function setETag($ETag) {
$this->ETag = $ETag;
return $this;
}
/**
* Set "last modified" date
* @param \DateTime $lastModified
* @return Response Reference to this object
* @since 6.0.0 - return value was added in 7.0.0
*/
public function setLastModified($lastModified) {
$this->lastModified = $lastModified;
return $this;
}
}