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- <?php
- /**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Andreas Fischer <bantu@owncloud.com>
- * @author Bart Visscher <bartv@thisnet.nl>
- * @author Joas Schilling <coding@schilljs.com>
- * @author Jörn Friedrich Dreyer <jfd@butonic.de>
- * @author Lukas Reschke <lukas@statuscode.ch>
- * @author Morris Jobke <hey@morrisjobke.de>
- * @author Robin McCorkell <robin@mccorkell.me.uk>
- * @author Sergio Bertolín <sbertolin@solidgear.es>
- * @author Stefan Weil <sw@weilnetz.de>
- * @author Thomas Müller <thomas.mueller@tmit.eu>
- * @author Vincent Petry <pvince81@owncloud.com>
- *
- * @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/>
- *
- */
- class OC_Response {
- /**
- * Sets the content disposition header (with possible workarounds)
- * @param string $filename file name
- * @param string $type disposition type, either 'attachment' or 'inline'
- */
- static public function setContentDispositionHeader( $filename, $type = 'attachment' ) {
- if (\OC::$server->getRequest()->isUserAgent(
- [
- \OC\AppFramework\Http\Request::USER_AGENT_IE,
- \OC\AppFramework\Http\Request::USER_AGENT_ANDROID_MOBILE_CHROME,
- \OC\AppFramework\Http\Request::USER_AGENT_FREEBOX,
- ])) {
- header( 'Content-Disposition: ' . rawurlencode($type) . '; filename="' . rawurlencode( $filename ) . '"' );
- } else {
- header( 'Content-Disposition: ' . rawurlencode($type) . '; filename*=UTF-8\'\'' . rawurlencode( $filename )
- . '; filename="' . rawurlencode( $filename ) . '"' );
- }
- }
- /**
- * Sets the content length header (with possible workarounds)
- * @param string|int|float $length Length to be sent
- */
- static public function setContentLengthHeader($length) {
- if (PHP_INT_SIZE === 4) {
- if ($length > PHP_INT_MAX && stripos(PHP_SAPI, 'apache') === 0) {
- // Apache PHP SAPI casts Content-Length headers to PHP integers.
- // This enforces a limit of PHP_INT_MAX (2147483647 on 32-bit
- // platforms). So, if the length is greater than PHP_INT_MAX,
- // we just do not send a Content-Length header to prevent
- // bodies from being received incompletely.
- return;
- }
- // Convert signed integer or float to unsigned base-10 string.
- $lfh = new \OC\LargeFileHelper;
- $length = $lfh->formatUnsignedInteger($length);
- }
- header('Content-Length: '.$length);
- }
- /**
- * This function adds some security related headers to all requests served via base.php
- * The implementation of this function has to happen here to ensure that all third-party
- * components (e.g. SabreDAV) also benefit from this headers.
- */
- public static function addSecurityHeaders() {
- /**
- * FIXME: Content Security Policy for legacy ownCloud components. This
- * can be removed once \OCP\AppFramework\Http\Response from the AppFramework
- * is used everywhere.
- * @see \OCP\AppFramework\Http\Response::getHeaders
- */
- $policy = 'default-src \'self\'; '
- . 'script-src \'self\' \'unsafe-eval\' \'nonce-'.\OC::$server->getContentSecurityPolicyNonceManager()->getNonce().'\'; '
- . 'style-src \'self\' \'unsafe-inline\'; '
- . 'frame-src *; '
- . 'img-src * data: blob:; '
- . 'font-src \'self\' data:; '
- . 'media-src *; '
- . 'connect-src *; '
- . 'object-src \'none\'; '
- . 'base-uri \'self\'; ';
- header('Content-Security-Policy:' . $policy);
- header('X-Frame-Options: SAMEORIGIN'); // Disallow iFraming from other domains
- // Send fallback headers for installations that don't have the possibility to send
- // custom headers on the webserver side
- if(getenv('modHeadersAvailable') !== 'true') {
- header('X-XSS-Protection: 1; mode=block'); // Enforce browser based XSS filters
- header('X-Content-Type-Options: nosniff'); // Disable sniffing the content type for IE
- header('X-Robots-Tag: none'); // https://developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag
- header('X-Download-Options: noopen'); // https://msdn.microsoft.com/en-us/library/jj542450(v=vs.85).aspx
- header('X-Permitted-Cross-Domain-Policies: none'); // https://www.adobe.com/devnet/adobe-media-server/articles/cross-domain-xml-for-streaming.html
- header('Referrer-Policy: no-referrer'); // https://www.w3.org/TR/referrer-policy/
- }
- }
- }
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