725 lines
21 KiB
PHP
725 lines
21 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 Adam Williamson <awilliam@redhat.com>
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
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* @author Bart Visscher <bartv@thisnet.nl>
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* @author Christopher Schäpers <kondou@ts.unde.re>
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* @author Francesco Rovelli <francesco.rovelli@gmail.com>
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* @author Jörn Friedrich Dreyer <jfd@butonic.de>
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* @author Lukas Reschke <lukas@statuscode.ch>
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* @author Michael Gapczynski <GapczynskiM@gmail.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Philipp Kapfer <philipp.kapfer@gmx.at>
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* @author Robin Appelman <robin@icewind.nl>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Thomas Müller <thomas.mueller@tmit.eu>
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* @author Vincent Petry <pvince81@owncloud.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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namespace OCA\Files_External\Lib\Storage;
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use GuzzleHttp\Exception\RequestException;
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use Icewind\Streams\CallbackWrapper;
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use Icewind\Streams\IteratorDirectory;
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use Icewind\Streams\RetryWrapper;
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set_include_path(get_include_path().PATH_SEPARATOR.
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\OC_App::getAppPath('files_external').'/3rdparty/google-api-php-client/src');
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require_once 'Google/autoload.php';
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class Google extends \OC\Files\Storage\Common {
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private $client;
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private $id;
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private $service;
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private $driveFiles;
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// Google Doc mimetypes
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const FOLDER = 'application/vnd.google-apps.folder';
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const DOCUMENT = 'application/vnd.google-apps.document';
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const SPREADSHEET = 'application/vnd.google-apps.spreadsheet';
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const DRAWING = 'application/vnd.google-apps.drawing';
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const PRESENTATION = 'application/vnd.google-apps.presentation';
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const MAP = 'application/vnd.google-apps.map';
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public function __construct($params) {
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if (isset($params['configured']) && $params['configured'] === 'true'
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&& isset($params['client_id']) && isset($params['client_secret'])
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&& isset($params['token'])
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) {
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$this->client = new \Google_Client();
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$this->client->setClientId($params['client_id']);
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$this->client->setClientSecret($params['client_secret']);
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$this->client->setScopes(array('https://www.googleapis.com/auth/drive'));
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$this->client->setAccessToken($params['token']);
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// if curl isn't available we're likely to run into
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// https://github.com/google/google-api-php-client/issues/59
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// - disable gzip to avoid it.
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if (!function_exists('curl_version') || !function_exists('curl_exec')) {
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$this->client->setClassConfig("Google_Http_Request", "disable_gzip", true);
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}
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// note: API connection is lazy
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$this->service = new \Google_Service_Drive($this->client);
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$token = json_decode($params['token'], true);
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$this->id = 'google::'.substr($params['client_id'], 0, 30).$token['created'];
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} else {
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throw new \Exception('Creating Google storage failed');
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}
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}
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public function getId() {
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return $this->id;
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}
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/**
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* Get the Google_Service_Drive_DriveFile object for the specified path.
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* Returns false on failure.
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* @param string $path
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* @return \Google_Service_Drive_DriveFile|false
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*/
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private function getDriveFile($path) {
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// Remove leading and trailing slashes
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$path = trim($path, '/');
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if ($path === '.') {
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$path = '';
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}
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if (isset($this->driveFiles[$path])) {
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return $this->driveFiles[$path];
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} else if ($path === '') {
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$root = $this->service->files->get('root');
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$this->driveFiles[$path] = $root;
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return $root;
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} else {
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// Google Drive SDK does not have methods for retrieving files by path
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// Instead we must find the id of the parent folder of the file
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$parentId = $this->getDriveFile('')->getId();
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$folderNames = explode('/', $path);
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$path = '';
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// Loop through each folder of this path to get to the file
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foreach ($folderNames as $name) {
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// Reconstruct path from beginning
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if ($path === '') {
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$path .= $name;
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} else {
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$path .= '/'.$name;
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}
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if (isset($this->driveFiles[$path])) {
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$parentId = $this->driveFiles[$path]->getId();
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} else {
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$q = "title='" . str_replace("'","\\'", $name) . "' and '" . str_replace("'","\\'", $parentId) . "' in parents and trashed = false";
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$result = $this->service->files->listFiles(array('q' => $q))->getItems();
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if (!empty($result)) {
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// Google Drive allows files with the same name, ownCloud doesn't
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if (count($result) > 1) {
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$this->onDuplicateFileDetected($path);
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return false;
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} else {
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$file = current($result);
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$this->driveFiles[$path] = $file;
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$parentId = $file->getId();
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}
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} else {
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// Google Docs have no extension in their title, so try without extension
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$pos = strrpos($path, '.');
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if ($pos !== false) {
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$pathWithoutExt = substr($path, 0, $pos);
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$file = $this->getDriveFile($pathWithoutExt);
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if ($file && $this->isGoogleDocFile($file)) {
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// Switch cached Google_Service_Drive_DriveFile to the correct index
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unset($this->driveFiles[$pathWithoutExt]);
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$this->driveFiles[$path] = $file;
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$parentId = $file->getId();
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} else {
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return false;
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}
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} else {
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return false;
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}
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}
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}
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}
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return $this->driveFiles[$path];
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}
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}
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/**
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* Set the Google_Service_Drive_DriveFile object in the cache
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* @param string $path
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* @param \Google_Service_Drive_DriveFile|false $file
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*/
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private function setDriveFile($path, $file) {
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$path = trim($path, '/');
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$this->driveFiles[$path] = $file;
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if ($file === false) {
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// Remove all children
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$len = strlen($path);
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foreach ($this->driveFiles as $key => $file) {
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if (substr($key, 0, $len) === $path) {
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unset($this->driveFiles[$key]);
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}
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}
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}
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}
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/**
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* Write a log message to inform about duplicate file names
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* @param string $path
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*/
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private function onDuplicateFileDetected($path) {
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$about = $this->service->about->get();
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$user = $about->getName();
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\OCP\Util::writeLog('files_external',
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'Ignoring duplicate file name: '.$path.' on Google Drive for Google user: '.$user,
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\OCP\Util::INFO
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);
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}
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/**
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* Generate file extension for a Google Doc, choosing Open Document formats for download
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* @param string $mimetype
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* @return string
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*/
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private function getGoogleDocExtension($mimetype) {
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if ($mimetype === self::DOCUMENT) {
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return 'odt';
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} else if ($mimetype === self::SPREADSHEET) {
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return 'ods';
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} else if ($mimetype === self::DRAWING) {
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return 'jpg';
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} else if ($mimetype === self::PRESENTATION) {
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// Download as .odp is not available
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return 'pdf';
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} else {
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return '';
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}
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}
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/**
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* Returns whether the given drive file is a Google Doc file
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*
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* @param \Google_Service_Drive_DriveFile
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*
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* @return true if the file is a Google Doc file, false otherwise
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*/
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private function isGoogleDocFile($file) {
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return $this->getGoogleDocExtension($file->getMimeType()) !== '';
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}
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public function mkdir($path) {
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if (!$this->is_dir($path)) {
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$parentFolder = $this->getDriveFile(dirname($path));
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if ($parentFolder) {
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$folder = new \Google_Service_Drive_DriveFile();
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$folder->setTitle(basename($path));
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$folder->setMimeType(self::FOLDER);
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$parent = new \Google_Service_Drive_ParentReference();
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$parent->setId($parentFolder->getId());
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$folder->setParents(array($parent));
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$result = $this->service->files->insert($folder);
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if ($result) {
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$this->setDriveFile($path, $result);
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}
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return (bool)$result;
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}
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}
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return false;
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}
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public function rmdir($path) {
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if (!$this->isDeletable($path)) {
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return false;
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}
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if (trim($path, '/') === '') {
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$dir = $this->opendir($path);
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if(is_resource($dir)) {
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while (($file = readdir($dir)) !== false) {
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if (!\OC\Files\Filesystem::isIgnoredDir($file)) {
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if (!$this->unlink($path.'/'.$file)) {
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return false;
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}
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}
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}
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closedir($dir);
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}
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$this->driveFiles = array();
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return true;
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} else {
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return $this->unlink($path);
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}
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}
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public function opendir($path) {
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$folder = $this->getDriveFile($path);
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if ($folder) {
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$files = array();
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$duplicates = array();
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$pageToken = true;
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while ($pageToken) {
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$params = array();
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if ($pageToken !== true) {
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$params['pageToken'] = $pageToken;
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}
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$params['q'] = "'" . str_replace("'","\\'", $folder->getId()) . "' in parents and trashed = false";
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$children = $this->service->files->listFiles($params);
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foreach ($children->getItems() as $child) {
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$name = $child->getTitle();
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// Check if this is a Google Doc i.e. no extension in name
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$extension = $child->getFileExtension();
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if (empty($extension)) {
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if ($child->getMimeType() === self::MAP) {
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continue; // No method known to transfer map files, ignore it
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} else if ($child->getMimeType() !== self::FOLDER) {
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$name .= '.'.$this->getGoogleDocExtension($child->getMimeType());
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}
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}
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if ($path === '') {
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$filepath = $name;
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} else {
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$filepath = $path.'/'.$name;
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}
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// Google Drive allows files with the same name, ownCloud doesn't
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// Prevent opendir() from returning any duplicate files
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$key = array_search($name, $files);
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if ($key !== false || isset($duplicates[$filepath])) {
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if (!isset($duplicates[$filepath])) {
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$duplicates[$filepath] = true;
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$this->setDriveFile($filepath, false);
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unset($files[$key]);
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$this->onDuplicateFileDetected($filepath);
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}
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} else {
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// Cache the Google_Service_Drive_DriveFile for future use
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$this->setDriveFile($filepath, $child);
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$files[] = $name;
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}
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}
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$pageToken = $children->getNextPageToken();
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}
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return IteratorDirectory::wrap($files);
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} else {
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return false;
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}
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}
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public function stat($path) {
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$file = $this->getDriveFile($path);
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if ($file) {
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$stat = array();
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if ($this->filetype($path) === 'dir') {
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$stat['size'] = 0;
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} else {
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// Check if this is a Google Doc
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if ($this->isGoogleDocFile($file)) {
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// Return unknown file size
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$stat['size'] = \OCP\Files\FileInfo::SPACE_UNKNOWN;
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} else {
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$stat['size'] = $file->getFileSize();
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}
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}
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$stat['atime'] = strtotime($file->getLastViewedByMeDate());
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$stat['mtime'] = strtotime($file->getModifiedDate());
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$stat['ctime'] = strtotime($file->getCreatedDate());
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return $stat;
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} else {
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return false;
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}
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}
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public function filetype($path) {
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if ($path === '') {
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return 'dir';
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} else {
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$file = $this->getDriveFile($path);
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if ($file) {
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if ($file->getMimeType() === self::FOLDER) {
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return 'dir';
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} else {
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return 'file';
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}
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} else {
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return false;
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}
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}
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}
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public function isUpdatable($path) {
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$file = $this->getDriveFile($path);
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if ($file) {
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return $file->getEditable();
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} else {
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return false;
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}
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}
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public function file_exists($path) {
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return (bool)$this->getDriveFile($path);
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}
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public function unlink($path) {
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$file = $this->getDriveFile($path);
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if ($file) {
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$result = $this->service->files->trash($file->getId());
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if ($result) {
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$this->setDriveFile($path, false);
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}
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return (bool)$result;
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} else {
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return false;
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}
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}
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public function rename($path1, $path2) {
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$file = $this->getDriveFile($path1);
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if ($file) {
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$newFile = $this->getDriveFile($path2);
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if (dirname($path1) === dirname($path2)) {
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if ($newFile) {
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// rename to the name of the target file, could be an office file without extension
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$file->setTitle($newFile->getTitle());
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} else {
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$file->setTitle(basename(($path2)));
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}
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} else {
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// Change file parent
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$parentFolder2 = $this->getDriveFile(dirname($path2));
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if ($parentFolder2) {
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$parent = new \Google_Service_Drive_ParentReference();
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$parent->setId($parentFolder2->getId());
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$file->setParents(array($parent));
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} else {
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return false;
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}
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}
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// We need to get the object for the existing file with the same
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// name (if there is one) before we do the patch. If oldfile
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// exists and is a directory we have to delete it before we
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// do the rename too.
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$oldfile = $this->getDriveFile($path2);
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if ($oldfile && $this->is_dir($path2)) {
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$this->rmdir($path2);
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$oldfile = false;
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}
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$result = $this->service->files->patch($file->getId(), $file);
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if ($result) {
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$this->setDriveFile($path1, false);
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$this->setDriveFile($path2, $result);
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if ($oldfile && $newFile) {
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// only delete if they have a different id (same id can happen for part files)
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if ($newFile->getId() !== $oldfile->getId()) {
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$this->service->files->delete($oldfile->getId());
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}
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}
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}
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return (bool)$result;
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} else {
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return false;
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}
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}
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public function fopen($path, $mode) {
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$pos = strrpos($path, '.');
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if ($pos !== false) {
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$ext = substr($path, $pos);
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} else {
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$ext = '';
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}
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switch ($mode) {
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case 'r':
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case 'rb':
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$file = $this->getDriveFile($path);
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if ($file) {
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$exportLinks = $file->getExportLinks();
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$mimetype = $this->getMimeType($path);
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$downloadUrl = null;
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if ($exportLinks && isset($exportLinks[$mimetype])) {
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$downloadUrl = $exportLinks[$mimetype];
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} else {
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$downloadUrl = $file->getDownloadUrl();
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}
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if (isset($downloadUrl)) {
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$request = new \Google_Http_Request($downloadUrl, 'GET', null, null);
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$httpRequest = $this->client->getAuth()->sign($request);
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// the library's service doesn't support streaming, so we use Guzzle instead
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$client = \OC::$server->getHTTPClientService()->newClient();
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try {
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$response = $client->get($downloadUrl, [
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'headers' => $httpRequest->getRequestHeaders(),
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'stream' => true,
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'verify' => realpath(__DIR__ . '/../../../3rdparty/google-api-php-client/src/Google/IO/cacerts.pem'),
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]);
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} catch (RequestException $e) {
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if(!is_null($e->getResponse())) {
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if ($e->getResponse()->getStatusCode() === 404) {
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return false;
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} else {
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throw $e;
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}
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} else {
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throw $e;
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}
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}
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$handle = $response->getBody();
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return RetryWrapper::wrap($handle);
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}
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}
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return false;
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case 'w':
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case 'wb':
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case 'a':
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case 'ab':
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case 'r+':
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case 'w+':
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case 'wb+':
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case 'a+':
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case 'x':
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case 'x+':
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case 'c':
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case 'c+':
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$tmpFile = \OCP\Files::tmpFile($ext);
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if ($this->file_exists($path)) {
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$source = $this->fopen($path, 'rb');
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file_put_contents($tmpFile, $source);
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}
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$handle = fopen($tmpFile, $mode);
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return CallbackWrapper::wrap($handle, null, null, function () use ($path, $tmpFile) {
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$this->writeBack($tmpFile, $path);
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});
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}
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}
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public function writeBack($tmpFile, $path) {
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$parentFolder = $this->getDriveFile(dirname($path));
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if ($parentFolder) {
|
|
$mimetype = \OC::$server->getMimeTypeDetector()->detect($tmpFile);
|
|
$params = array(
|
|
'mimeType' => $mimetype,
|
|
'uploadType' => 'media'
|
|
);
|
|
$result = false;
|
|
|
|
$chunkSizeBytes = 10 * 1024 * 1024;
|
|
|
|
$useChunking = false;
|
|
$size = filesize($tmpFile);
|
|
if ($size > $chunkSizeBytes) {
|
|
$useChunking = true;
|
|
} else {
|
|
$params['data'] = file_get_contents($tmpFile);
|
|
}
|
|
|
|
if ($this->file_exists($path)) {
|
|
$file = $this->getDriveFile($path);
|
|
$this->client->setDefer($useChunking);
|
|
$request = $this->service->files->update($file->getId(), $file, $params);
|
|
} else {
|
|
$file = new \Google_Service_Drive_DriveFile();
|
|
$file->setTitle(basename($path));
|
|
$file->setMimeType($mimetype);
|
|
$parent = new \Google_Service_Drive_ParentReference();
|
|
$parent->setId($parentFolder->getId());
|
|
$file->setParents(array($parent));
|
|
$this->client->setDefer($useChunking);
|
|
$request = $this->service->files->insert($file, $params);
|
|
}
|
|
|
|
if ($useChunking) {
|
|
// Create a media file upload to represent our upload process.
|
|
$media = new \Google_Http_MediaFileUpload(
|
|
$this->client,
|
|
$request,
|
|
'text/plain',
|
|
null,
|
|
true,
|
|
$chunkSizeBytes
|
|
);
|
|
$media->setFileSize($size);
|
|
|
|
// Upload the various chunks. $status will be false until the process is
|
|
// complete.
|
|
$status = false;
|
|
$handle = fopen($tmpFile, 'rb');
|
|
while (!$status && !feof($handle)) {
|
|
$chunk = fread($handle, $chunkSizeBytes);
|
|
$status = $media->nextChunk($chunk);
|
|
}
|
|
|
|
// The final value of $status will be the data from the API for the object
|
|
// that has been uploaded.
|
|
$result = false;
|
|
if ($status !== false) {
|
|
$result = $status;
|
|
}
|
|
|
|
fclose($handle);
|
|
} else {
|
|
$result = $request;
|
|
}
|
|
|
|
// Reset to the client to execute requests immediately in the future.
|
|
$this->client->setDefer(false);
|
|
|
|
if ($result) {
|
|
$this->setDriveFile($path, $result);
|
|
}
|
|
}
|
|
}
|
|
|
|
public function getMimeType($path) {
|
|
$file = $this->getDriveFile($path);
|
|
if ($file) {
|
|
$mimetype = $file->getMimeType();
|
|
// Convert Google Doc mimetypes, choosing Open Document formats for download
|
|
if ($mimetype === self::FOLDER) {
|
|
return 'httpd/unix-directory';
|
|
} else if ($mimetype === self::DOCUMENT) {
|
|
return 'application/vnd.oasis.opendocument.text';
|
|
} else if ($mimetype === self::SPREADSHEET) {
|
|
return 'application/x-vnd.oasis.opendocument.spreadsheet';
|
|
} else if ($mimetype === self::DRAWING) {
|
|
return 'image/jpeg';
|
|
} else if ($mimetype === self::PRESENTATION) {
|
|
// Download as .odp is not available
|
|
return 'application/pdf';
|
|
} else {
|
|
// use extension-based detection, could be an encrypted file
|
|
return parent::getMimeType($path);
|
|
}
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
public function free_space($path) {
|
|
$about = $this->service->about->get();
|
|
return $about->getQuotaBytesTotal() - $about->getQuotaBytesUsed();
|
|
}
|
|
|
|
public function touch($path, $mtime = null) {
|
|
$file = $this->getDriveFile($path);
|
|
$result = false;
|
|
if ($file) {
|
|
if (isset($mtime)) {
|
|
// This is just RFC3339, but frustratingly, GDrive's API *requires*
|
|
// the fractions portion be present, while no handy PHP constant
|
|
// for RFC3339 or ISO8601 includes it. So we do it ourselves.
|
|
$file->setModifiedDate(date('Y-m-d\TH:i:s.uP', $mtime));
|
|
$result = $this->service->files->patch($file->getId(), $file, array(
|
|
'setModifiedDate' => true,
|
|
));
|
|
} else {
|
|
$result = $this->service->files->touch($file->getId());
|
|
}
|
|
} else {
|
|
$parentFolder = $this->getDriveFile(dirname($path));
|
|
if ($parentFolder) {
|
|
$file = new \Google_Service_Drive_DriveFile();
|
|
$file->setTitle(basename($path));
|
|
$parent = new \Google_Service_Drive_ParentReference();
|
|
$parent->setId($parentFolder->getId());
|
|
$file->setParents(array($parent));
|
|
$result = $this->service->files->insert($file);
|
|
}
|
|
}
|
|
if ($result) {
|
|
$this->setDriveFile($path, $result);
|
|
}
|
|
return (bool)$result;
|
|
}
|
|
|
|
public function test() {
|
|
if ($this->free_space('')) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public function hasUpdated($path, $time) {
|
|
$appConfig = \OC::$server->getAppConfig();
|
|
if ($this->is_file($path)) {
|
|
return parent::hasUpdated($path, $time);
|
|
} else {
|
|
// Google Drive doesn't change modified times of folders when files inside are updated
|
|
// Instead we use the Changes API to see if folders have been updated, and it's a pain
|
|
$folder = $this->getDriveFile($path);
|
|
if ($folder) {
|
|
$result = false;
|
|
$folderId = $folder->getId();
|
|
$startChangeId = $appConfig->getValue('files_external', $this->getId().'cId');
|
|
$params = array(
|
|
'includeDeleted' => true,
|
|
'includeSubscribed' => true,
|
|
);
|
|
if (isset($startChangeId)) {
|
|
$startChangeId = (int)$startChangeId;
|
|
$largestChangeId = $startChangeId;
|
|
$params['startChangeId'] = $startChangeId + 1;
|
|
} else {
|
|
$largestChangeId = 0;
|
|
}
|
|
$pageToken = true;
|
|
while ($pageToken) {
|
|
if ($pageToken !== true) {
|
|
$params['pageToken'] = $pageToken;
|
|
}
|
|
$changes = $this->service->changes->listChanges($params);
|
|
if ($largestChangeId === 0 || $largestChangeId === $startChangeId) {
|
|
$largestChangeId = $changes->getLargestChangeId();
|
|
}
|
|
if (isset($startChangeId)) {
|
|
// Check if a file in this folder has been updated
|
|
// There is no way to filter by folder at the API level...
|
|
foreach ($changes->getItems() as $change) {
|
|
$file = $change->getFile();
|
|
if ($file) {
|
|
foreach ($file->getParents() as $parent) {
|
|
if ($parent->getId() === $folderId) {
|
|
$result = true;
|
|
// Check if there are changes in different folders
|
|
} else if ($change->getId() <= $largestChangeId) {
|
|
// Decrement id so this change is fetched when called again
|
|
$largestChangeId = $change->getId();
|
|
$largestChangeId--;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
$pageToken = $changes->getNextPageToken();
|
|
} else {
|
|
// Assuming the initial scan just occurred and changes are negligible
|
|
break;
|
|
}
|
|
}
|
|
$appConfig->setValue('files_external', $this->getId().'cId', $largestChangeId);
|
|
return $result;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* check if curl is installed
|
|
*/
|
|
public static function checkDependencies() {
|
|
return true;
|
|
}
|
|
|
|
}
|