owncloud/core

<?php
/**
 * @author Vincent Petry <pvince81@owncloud.com>
 *
 * @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/>
 *
 */

namespace OC\Http\Client;

use OCP\Http\Client\IWebDavClientService;
use OCP\IConfig;
use OCP\ICertificateManager;

/**
 * Class WebDavClientService
 *
 * @package OC\Http
 */
class WebDavClientService implements IWebDavClientService {
    /** @var IConfig */
    private $config;
    /** @var ICertificateManager */
    private $certificateManager;

    /**
     * @param IConfig $config
     * @param ICertificateManager $certificateManager
     */
    public function __construct(
        IConfig $config,
        ICertificateManager $certificateManager
    ) {
        $this->config = $config;
        $this->certificateManager = $certificateManager;
    }

    /**
     * Instantiate new Sabre client
     *
     * Settings are provided through the 'settings' argument. The following
     * settings are supported:
     *
     *   * baseUri
     *   * userName (optional)
     *   * password (optional)
     *   * proxy (optional)
     *   * authType (optional)
     *   * encoding (optional)
     *
     *  authType must be a bitmap, using self::AUTH_BASIC, self::AUTH_DIGEST
     *  and self::AUTH_NTLM. If you know which authentication method will be
     *  used, it's recommended to set it, as it will save a great deal of
     *  requests to 'discover' this information.
     *
     *  Encoding is a bitmap with one of the ENCODING constants.
     *
     * @param array $settings Sabre client settings
     * @return Client
     */
    public function newClient($settings) {
        if (!isset($settings['proxy'])) {
            $proxy = $this->getProxyUri();
            if ($proxy !== '') {
                $settings['proxy'] = $proxy;
            }
        }

        $certPath = null;
        if (\strpos($settings['baseUri'], 'https') === 0) {
            $certPath = $this->certificateManager->getAbsoluteBundlePath();
            if (!\file_exists($certPath)) {
                $certPath = null;
            }
        }

        $client = new \Sabre\DAV\Client($settings);
        $client->setThrowExceptions(true);

        if ($certPath !== null) {
            $client->addCurlSetting(CURLOPT_CAINFO, $certPath);
        }
        return $client;
    }

    /**
     * Get the proxy URI
     *
     * @return string
     */
    private function getProxyUri() {
        $proxyHost = $this->config->getSystemValue('proxy', null);
        $proxyUserPwd = $this->config->getSystemValue('proxyuserpwd', null);
        $proxyUri = '';
        if ($proxyUserPwd !== null) {
            $proxyUri .= $proxyUserPwd . '@';
        }
        if ($proxyHost !== null) {
            $proxyUri .= $proxyHost;
        }
        return $proxyUri;
    }
}