nextcloud/lib/private/files/storage/dav.php

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<?php
/**
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* @author Alexander Bogdanov <syn@li.ru>
* @author Bart Visscher <bartv@thisnet.nl>
* @author Bjoern Schiessle <schiessle@owncloud.com>
* @author Björn Schießle <schiessle@owncloud.com>
* @author Carlos Cerrillo <ccerrillo@gmail.com>
* @author Felix Moeller <mail@felixmoeller.de>
* @author Joas Schilling <nickvergessen@gmx.de>
* @author Jörn Friedrich Dreyer <jfd@butonic.de>
* @author Lukas Reschke <lukas@owncloud.com>
* @author Michael Gapczynski <gapczynskim@gmail.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Philippe Kueck <pk@plusline.de>
* @author Philipp Kapfer <philipp.kapfer@gmx.at>
* @author Robin Appelman <icewind@owncloud.com>
* @author Scrutinizer Auto-Fixer <auto-fixer@scrutinizer-ci.com>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <pvince81@owncloud.com>
*
* @copyright Copyright (c) 2015, ownCloud, Inc.
* @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/>
*
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*/
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namespace OC\Files\Storage;
use OCP\Files\StorageInvalidException;
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use OCP\Files\StorageNotAvailableException;
use Sabre\DAV\Exception;
class DAV extends \OC\Files\Storage\Common {
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protected $password;
protected $user;
protected $host;
protected $secure;
protected $root;
protected $certPath;
protected $ready;
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/**
* @var \Sabre\DAV\Client
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*/
private $client;
private static $tempFiles = array();
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public function __construct($params) {
if (isset($params['host']) && isset($params['user']) && isset($params['password'])) {
$host = $params['host'];
//remove leading http[s], will be generated in createBaseUri()
if (substr($host, 0, 8) == "https://") $host = substr($host, 8);
else if (substr($host, 0, 7) == "http://") $host = substr($host, 7);
$this->host = $host;
$this->user = $params['user'];
$this->password = $params['password'];
if (isset($params['secure'])) {
if (is_string($params['secure'])) {
$this->secure = ($params['secure'] === 'true');
} else {
$this->secure = (bool)$params['secure'];
}
} else {
$this->secure = false;
}
if ($this->secure === true) {
$certPath = \OC_User::getHome(\OC_User::getUser()) . '/files_external/rootcerts.crt';
if (file_exists($certPath)) {
$this->certPath = $certPath;
}
}
$this->root = isset($params['root']) ? $params['root'] : '/';
if (!$this->root || $this->root[0] != '/') {
$this->root = '/' . $this->root;
}
if (substr($this->root, -1, 1) != '/') {
$this->root .= '/';
}
} else {
throw new \Exception('Invalid webdav storage configuration');
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}
}
private function init() {
if ($this->ready) {
return;
}
$this->ready = true;
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$settings = array(
'baseUri' => $this->createBaseUri(),
'userName' => $this->user,
'password' => $this->password,
);
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$this->client = new \Sabre\DAV\Client($settings);
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if ($this->secure === true && $this->certPath) {
$this->client->addTrustedCertificates($this->certPath);
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}
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}
public function getId() {
return 'webdav::' . $this->user . '@' . $this->host . '/' . $this->root;
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}
public function createBaseUri() {
$baseUri = 'http';
if ($this->secure) {
$baseUri .= 's';
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}
$baseUri .= '://' . $this->host . $this->root;
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return $baseUri;
}
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public function mkdir($path) {
$this->init();
$path = $this->cleanPath($path);
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return $this->simpleResponse('MKCOL', $path, null, 201);
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}
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public function rmdir($path) {
$this->init();
$path = $this->cleanPath($path) . '/';
// FIXME: some WebDAV impl return 403 when trying to DELETE
// a non-empty folder
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return $this->simpleResponse('DELETE', $path, null, 204);
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}
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public function opendir($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array(), 1);
$id = md5('webdav' . $this->root . $path);
$content = array();
$files = array_keys($response);
array_shift($files); //the first entry is the current directory
foreach ($files as $file) {
$file = urldecode(basename($file));
$content[] = $file;
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}
\OC\Files\Stream\Dir::register($id, $content);
return opendir('fakedir://' . $id);
} catch (Exception\NotFound $e) {
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
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public function filetype($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}resourcetype'));
$responseType = array();
if (isset($response["{DAV:}resourcetype"])) {
$responseType = $response["{DAV:}resourcetype"]->resourceType;
}
return (count($responseType) > 0 and $responseType[0] == "{DAV:}collection") ? 'dir' : 'file';
} catch (Exception\NotFound $e) {
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
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public function file_exists($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$this->client->propfind($this->encodePath($path), array('{DAV:}resourcetype'));
return true; //no 404 exception
} catch (Exception\NotFound $e) {
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
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public function unlink($path) {
$this->init();
return $this->simpleResponse('DELETE', $path, null, 204);
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}
public function fopen($path, $mode) {
$this->init();
$path = $this->cleanPath($path);
switch ($mode) {
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case 'r':
case 'rb':
if (!$this->file_exists($path)) {
return false;
}
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//straight up curl instead of sabredav here, sabredav put's the entire get result in memory
$curl = curl_init();
$fp = fopen('php://temp', 'r+');
curl_setopt($curl, CURLOPT_USERPWD, $this->user . ':' . $this->password);
curl_setopt($curl, CURLOPT_URL, $this->createBaseUri() . $this->encodePath($path));
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curl_setopt($curl, CURLOPT_FILE, $fp);
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
curl_setopt($curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
if ($this->secure === true) {
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
if ($this->certPath) {
curl_setopt($curl, CURLOPT_CAINFO, $this->certPath);
}
}
curl_exec($curl);
$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($statusCode !== 200) {
\OCP\Util::writeLog("webdav client", 'curl GET ' . curl_getinfo($curl, CURLINFO_EFFECTIVE_URL) . ' returned status code ' . $statusCode, \OCP\Util::ERROR);
}
curl_close($curl);
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rewind($fp);
return $fp;
case 'w':
case 'wb':
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
//emulate these
if (strrpos($path, '.') !== false) {
$ext = substr($path, strrpos($path, '.'));
} else {
$ext = '';
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}
if ($this->file_exists($path)) {
if (!$this->isUpdatable($path)) {
return false;
}
$tmpFile = $this->getCachedFile($path);
} else {
if (!$this->isCreatable(dirname($path))) {
return false;
}
$tmpFile = \OCP\Files::tmpFile($ext);
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}
\OC\Files\Stream\Close::registerCallback($tmpFile, array($this, 'writeBack'));
self::$tempFiles[$tmpFile] = $path;
return fopen('close://' . $tmpFile, $mode);
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}
}
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public function writeBack($tmpFile) {
if (isset(self::$tempFiles[$tmpFile])) {
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$this->uploadFile($tmpFile, self::$tempFiles[$tmpFile]);
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unlink($tmpFile);
}
}
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public function free_space($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}quota-available-bytes'));
if (isset($response['{DAV:}quota-available-bytes'])) {
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return (int)$response['{DAV:}quota-available-bytes'];
} else {
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return \OCP\Files\FileInfo::SPACE_UNKNOWN;
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}
} catch (\Exception $e) {
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return \OCP\Files\FileInfo::SPACE_UNKNOWN;
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}
}
public function touch($path, $mtime = null) {
$this->init();
if (is_null($mtime)) {
$mtime = time();
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}
$path = $this->cleanPath($path);
// if file exists, update the mtime, else create a new empty file
if ($this->file_exists($path)) {
try {
$this->client->proppatch($this->encodePath($path), array('{DAV:}lastmodified' => $mtime));
} catch (Exception\NotImplemented $e) {
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
return false;
}
} else {
$this->file_put_contents($path, '');
}
return true;
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}
protected function uploadFile($path, $target) {
$this->init();
$source = fopen($path, 'r');
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$curl = curl_init();
curl_setopt($curl, CURLOPT_USERPWD, $this->user . ':' . $this->password);
curl_setopt($curl, CURLOPT_URL, $this->createBaseUri() . $this->encodePath($target));
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curl_setopt($curl, CURLOPT_BINARYTRANSFER, true);
curl_setopt($curl, CURLOPT_INFILE, $source); // file pointer
curl_setopt($curl, CURLOPT_INFILESIZE, filesize($path));
curl_setopt($curl, CURLOPT_PUT, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
curl_setopt($curl, CURLOPT_REDIR_PROTOCOLS, CURLPROTO_HTTP | CURLPROTO_HTTPS);
if ($this->secure === true) {
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2);
if ($this->certPath) {
curl_setopt($curl, CURLOPT_CAINFO, $this->certPath);
}
}
curl_exec($curl);
$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ($statusCode !== 200) {
\OCP\Util::writeLog("webdav client", 'curl GET ' . curl_getinfo($curl, CURLINFO_EFFECTIVE_URL) . ' returned status code ' . $statusCode, \OCP\Util::ERROR);
}
curl_close($curl);
fclose($source);
$this->removeCachedFile($target);
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}
public function rename($path1, $path2) {
$this->init();
$path1 = $this->encodePath($this->cleanPath($path1));
$path2 = $this->createBaseUri() . $this->encodePath($this->cleanPath($path2));
try {
$this->client->request('MOVE', $path1, null, array('Destination' => $path2));
$this->removeCachedFile($path1);
$this->removeCachedFile($path2);
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return true;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
public function copy($path1, $path2) {
$this->init();
$path1 = $this->encodePath($this->cleanPath($path1));
$path2 = $this->createBaseUri() . $this->encodePath($this->cleanPath($path2));
try {
$this->client->request('COPY', $path1, null, array('Destination' => $path2));
$this->removeCachedFile($path2);
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return true;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
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public function stat($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}getlastmodified', '{DAV:}getcontentlength'));
return array(
'mtime' => strtotime($response['{DAV:}getlastmodified']),
'size' => (int)isset($response['{DAV:}getcontentlength']) ? $response['{DAV:}getcontentlength'] : 0,
);
} catch (Exception\NotFound $e) {
return array();
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return array();
}
}
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public function getMimeType($path) {
$this->init();
$path = $this->cleanPath($path);
try {
$response = $this->client->propfind($this->encodePath($path), array('{DAV:}getcontenttype', '{DAV:}resourcetype'));
$responseType = array();
if (isset($response["{DAV:}resourcetype"])) {
$responseType = $response["{DAV:}resourcetype"]->resourceType;
}
$type = (count($responseType) > 0 and $responseType[0] == "{DAV:}collection") ? 'dir' : 'file';
if ($type == 'dir') {
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return 'httpd/unix-directory';
} elseif (isset($response['{DAV:}getcontenttype'])) {
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return $response['{DAV:}getcontenttype'];
} else {
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return false;
}
} catch (Exception\NotFound $e) {
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
/**
* @param string $path
*/
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public function cleanPath($path) {
if ($path === "") {
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return $path;
}
$path = \OC\Files\Filesystem::normalizePath($path);
// remove leading slash
return substr($path, 1);
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}
/**
* URL encodes the given path but keeps the slashes
*
* @param string $path to encode
* @return string encoded path
*/
private function encodePath($path) {
// slashes need to stay
return str_replace('%2F', '/', rawurlencode($path));
}
/**
* @param string $method
* @param string $path
* @param integer $expected
*/
private function simpleResponse($method, $path, $body, $expected) {
$path = $this->cleanPath($path);
try {
$response = $this->client->request($method, $this->encodePath($path), $body);
return $response['statusCode'] == $expected;
} catch (Exception\NotFound $e) {
if ($method === 'DELETE') {
return false;
}
$this->convertSabreException($e);
return false;
} catch (\Sabre\DAV\Exception $e) {
$this->convertSabreException($e);
return false;
} catch (\Exception $e) {
// TODO: log for now, but in the future need to wrap/rethrow exception
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
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return false;
}
}
/**
* check if curl is installed
*/
public static function checkDependencies() {
if (function_exists('curl_init')) {
return true;
} else {
return array('curl');
}
}
public function isUpdatable($path) {
return (bool)($this->getPermissions($path) & \OCP\Constants::PERMISSION_UPDATE);
}
public function isCreatable($path) {
return (bool)($this->getPermissions($path) & \OCP\Constants::PERMISSION_CREATE);
}
public function isSharable($path) {
return (bool)($this->getPermissions($path) & \OCP\Constants::PERMISSION_SHARE);
}
public function isDeletable($path) {
return (bool)($this->getPermissions($path) & \OCP\Constants::PERMISSION_DELETE);
}
public function getPermissions($path) {
$this->init();
$path = $this->cleanPath($path);
$response = $this->client->propfind($this->encodePath($path), array('{http://owncloud.org/ns}permissions'));
if (isset($response['{http://owncloud.org/ns}permissions'])) {
return $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
} else if ($this->is_dir($path)) {
return \OCP\Constants::PERMISSION_ALL;
} else if ($this->file_exists($path)) {
return \OCP\Constants::PERMISSION_ALL - \OCP\Constants::PERMISSION_CREATE;
} else {
return 0;
}
}
/**
* @param string $permissionsString
* @return int
*/
protected function parsePermissions($permissionsString) {
$permissions = \OCP\Constants::PERMISSION_READ;
if (strpos($permissionsString, 'R') !== false) {
$permissions |= \OCP\Constants::PERMISSION_SHARE;
}
if (strpos($permissionsString, 'D') !== false) {
$permissions |= \OCP\Constants::PERMISSION_DELETE;
}
if (strpos($permissionsString, 'W') !== false) {
$permissions |= \OCP\Constants::PERMISSION_UPDATE;
}
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if (strpos($permissionsString, 'CK') !== false) {
$permissions |= \OCP\Constants::PERMISSION_CREATE;
$permissions |= \OCP\Constants::PERMISSION_UPDATE;
}
return $permissions;
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
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* @throws \OCP\Files\StorageNotAvailableException
* @return bool
*/
public function hasUpdated($path, $time) {
$this->init();
$path = $this->cleanPath($path);
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try {
$response = $this->client->propfind($this->encodePath($path), array(
'{DAV:}getlastmodified',
'{DAV:}getetag',
'{http://owncloud.org/ns}permissions'
));
if (isset($response['{DAV:}getetag'])) {
$cachedData = $this->getCache()->get($path);
$etag = trim($response['{DAV:}getetag'], '"');
if ($cachedData['etag'] !== $etag) {
return true;
} else if (isset($response['{http://owncloud.org/ns}permissions'])) {
$permissions = $this->parsePermissions($response['{http://owncloud.org/ns}permissions']);
return $permissions !== $cachedData['permissions'];
} else {
return false;
}
} else {
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$remoteMtime = strtotime($response['{DAV:}getlastmodified']);
return $remoteMtime > $time;
}
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} catch (Exception\NotFound $e) {
return false;
} catch (Exception $e) {
$this->convertSabreException($e);
return false;
}
}
/**
* Convert sabre DAV exception to a storage exception,
* then throw it
*
* @param \Sabre\Dav\Exception $e sabre exception
* @throws StorageInvalidException if the storage is invalid, for example
* when the authentication expired or is invalid
* @throws StorageNotAvailableException if the storage is not available,
* which might be temporary
*/
private function convertSabreException(\Sabre\Dav\Exception $e) {
\OCP\Util::writeLog('files_external', $e->getMessage(), \OCP\Util::ERROR);
if ($e instanceof \Sabre\DAV\Exception\NotAuthenticated) {
// either password was changed or was invalid all along
throw new StorageInvalidException(get_class($e).': '.$e->getMessage());
} else if ($e instanceof \Sabre\DAV\Exception\MethodNotAllowed) {
// ignore exception, false will be returned
return;
}
throw new StorageNotAvailableException(get_class($e).': '.$e->getMessage());
}
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}