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63b74dc506
Signed-off-by: John Molakvoæ <skjnldsv@users.noreply.github.com> Signed-off-by: skjnldsv <skjnldsv@protonmail.com>
74 lines
2.8 KiB
PHP
74 lines
2.8 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 OCA\DAV\Connector\Sabre;
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use OCA\Theming\ThemingDefaults;
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use OCP\IConfig;
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use OCP\IRequest;
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use Sabre\DAV\Server;
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use Sabre\DAV\ServerPlugin;
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use Sabre\HTTP\RequestInterface;
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/**
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* Class BlockLegacyClientPlugin is used to detect old legacy sync clients and
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* returns a 403 status to those clients
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*
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* @package OCA\DAV\Connector\Sabre
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*/
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class BlockLegacyClientPlugin extends ServerPlugin {
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protected ?Server $server = null;
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public function __construct(
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private IConfig $config,
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private ThemingDefaults $themingDefaults,
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) {
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}
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/**
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* @return void
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*/
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public function initialize(Server $server) {
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$this->server = $server;
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$this->server->on('beforeMethod:*', [$this, 'beforeHandler'], 200);
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}
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/**
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* Detects all unsupported clients and throws a \Sabre\DAV\Exception\Forbidden
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* exception which will result in a 403 to them.
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* @param RequestInterface $request
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* @throws \Sabre\DAV\Exception\Forbidden If the client version is not supported
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*/
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public function beforeHandler(RequestInterface $request) {
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$userAgent = $request->getHeader('User-Agent');
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if ($userAgent === null) {
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return;
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}
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$minimumSupportedDesktopVersion = $this->config->getSystemValueString('minimum.supported.desktop.version', '2.7.0');
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$maximumSupportedDesktopVersion = $this->config->getSystemValueString('maximum.supported.desktop.version', '99.99.99');
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// Check if the client is a desktop client
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preg_match(IRequest::USER_AGENT_CLIENT_DESKTOP, $userAgent, $versionMatches);
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// If the client is a desktop client and the version is too old, block it
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if (isset($versionMatches[1]) && version_compare($versionMatches[1], $minimumSupportedDesktopVersion) === -1) {
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$customClientDesktopLink = htmlspecialchars($this->themingDefaults->getSyncClientUrl());
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$minimumSupportedDesktopVersion = htmlspecialchars($minimumSupportedDesktopVersion);
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throw new \Sabre\DAV\Exception\Forbidden("This version of the client is unsupported. Upgrade to <a href=\"$customClientDesktopLink\">version $minimumSupportedDesktopVersion or later</a>.");
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}
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// If the client is a desktop client and the version is too new, block it
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if (isset($versionMatches[1]) && version_compare($versionMatches[1], $maximumSupportedDesktopVersion) === 1) {
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$customClientDesktopLink = htmlspecialchars($this->themingDefaults->getSyncClientUrl());
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$maximumSupportedDesktopVersion = htmlspecialchars($maximumSupportedDesktopVersion);
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throw new \Sabre\DAV\Exception\Forbidden("This version of the client is unsupported. Downgrade to <a href=\"$customClientDesktopLink\">version $maximumSupportedDesktopVersion or earlier</a>.");
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}
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}
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}
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