mirror of https://github.com/nextcloud/server
107 lines
4.4 KiB
PHP
107 lines
4.4 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Andreas Fischer <bantu@owncloud.com>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author J0WI <J0WI@users.noreply.github.com>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <vincent@nextcloud.com>
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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
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* it under the terms of the GNU Affero General Public License, version 3,
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* 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
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* 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,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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class OC_Response {
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/**
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* Sets the content disposition header (with possible workarounds)
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* @param string $filename file name
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* @param string $type disposition type, either 'attachment' or 'inline'
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*/
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public static function setContentDispositionHeader($filename, $type = 'attachment') {
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if (\OC::$server->getRequest()->isUserAgent(
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[
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\OC\AppFramework\Http\Request::USER_AGENT_IE,
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\OC\AppFramework\Http\Request::USER_AGENT_ANDROID_MOBILE_CHROME,
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\OC\AppFramework\Http\Request::USER_AGENT_FREEBOX,
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])) {
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header('Content-Disposition: ' . rawurlencode($type) . '; filename="' . rawurlencode($filename) . '"');
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} else {
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header('Content-Disposition: ' . rawurlencode($type) . '; filename*=UTF-8\'\'' . rawurlencode($filename)
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. '; filename="' . rawurlencode($filename) . '"');
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}
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}
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/**
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* Sets the content length header (with possible workarounds)
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* @param string|int|float $length Length to be sent
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*/
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public static function setContentLengthHeader($length) {
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if (PHP_INT_SIZE === 4) {
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if ($length > PHP_INT_MAX && stripos(PHP_SAPI, 'apache') === 0) {
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// Apache PHP SAPI casts Content-Length headers to PHP integers.
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// This enforces a limit of PHP_INT_MAX (2147483647 on 32-bit
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// platforms). So, if the length is greater than PHP_INT_MAX,
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// we just do not send a Content-Length header to prevent
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// bodies from being received incompletely.
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return;
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}
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// Convert signed integer or float to unsigned base-10 string.
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$lfh = new \OC\LargeFileHelper;
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$length = $lfh->formatUnsignedInteger($length);
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}
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header('Content-Length: '.$length);
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}
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/**
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* This function adds some security related headers to all requests served via base.php
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* The implementation of this function has to happen here to ensure that all third-party
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* components (e.g. SabreDAV) also benefit from this headers.
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*/
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public static function addSecurityHeaders() {
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/**
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* FIXME: Content Security Policy for legacy ownCloud components. This
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* can be removed once \OCP\AppFramework\Http\Response from the AppFramework
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* is used everywhere.
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* @see \OCP\AppFramework\Http\Response::getHeaders
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*/
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$policy = 'default-src \'self\'; '
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. 'script-src \'self\' \'nonce-'.\OC::$server->getContentSecurityPolicyNonceManager()->getNonce().'\'; '
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. 'style-src \'self\' \'unsafe-inline\'; '
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. 'frame-src *; '
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. 'img-src * data: blob:; '
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. 'font-src \'self\' data:; '
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. 'media-src *; '
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. 'connect-src *; '
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. 'object-src \'none\'; '
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. 'base-uri \'self\'; ';
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header('Content-Security-Policy:' . $policy);
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// Send fallback headers for installations that don't have the possibility to send
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// custom headers on the webserver side
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if (getenv('modHeadersAvailable') !== 'true') {
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header('Referrer-Policy: no-referrer'); // https://www.w3.org/TR/referrer-policy/
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header('X-Content-Type-Options: nosniff'); // Disable sniffing the content type for IE
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header('X-Frame-Options: SAMEORIGIN'); // Disallow iFraming from other domains
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header('X-Permitted-Cross-Domain-Policies: none'); // https://www.adobe.com/devnet/adobe-media-server/articles/cross-domain-xml-for-streaming.html
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header('X-Robots-Tag: none'); // https://developers.google.com/webmasters/control-crawl-index/docs/robots_meta_tag
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header('X-XSS-Protection: 1; mode=block'); // Enforce browser based XSS filters
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}
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}
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}
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