1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
<?php
/**
* Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
namespace OCA\Files_Sharing\External;
use OC\Files\Filesystem;
use OC\Files\Storage\DAV;
use OC\ForbiddenException;
use OCA\Files_Sharing\ISharedStorage;
use OCP\Files\NotFoundException;
use OCP\Files\StorageInvalidException;
use OCP\Files\StorageNotAvailableException;
class Storage extends DAV implements ISharedStorage {
/**
* @var string
*/
private $remoteUser;
/**
* @var string
*/
private $remote;
/**
* @var string
*/
private $mountPoint;
/**
* @var string
*/
private $token;
private $updateChecked = false;
/**
* @var \OCA\Files_Sharing\External\Manager
*/
private $manager;
public function __construct($options) {
$this->manager = $options['manager'];
$this->remote = $options['remote'];
$this->remoteUser = $options['owner'];
list($protocol, $remote) = explode('://', $this->remote);
if (strpos($remote, '/')) {
list($host, $root) = explode('/', $remote, 2);
} else {
$host = $remote;
$root = '';
}
$secure = $protocol === 'https';
$root = rtrim($root, '/') . '/public.php/webdav';
$this->mountPoint = $options['mountpoint'];
$this->token = $options['token'];
parent::__construct(array(
'secure' => $secure,
'host' => $host,
'root' => $root,
'user' => $options['token'],
'password' => $options['password']
));
}
public function getRemoteUser() {
return $this->remoteUser;
}
public function getRemote() {
return $this->remote;
}
public function getMountPoint() {
return $this->mountPoint;
}
public function getToken() {
return $this->token;
}
public function getPassword() {
return $this->password;
}
/**
* @brief get id of the mount point
* @return string
*/
public function getId() {
return 'shared::' . md5($this->token . '@' . $this->remote);
}
public function getCache($path = '', $storage = null) {
if (!$storage) {
$this->cache = new Cache($this, $this->remote, $this->remoteUser);
}
return $this->cache;
}
/**
* @param string $path
* @param \OC\Files\Storage\Storage $storage
* @return \OCA\Files_Sharing\External\Scanner
*/
public function getScanner($path = '', $storage = null) {
if (!$storage) {
$storage = $this;
}
if (!isset($this->scanner)) {
$this->scanner = new Scanner($storage);
}
return $this->scanner;
}
/**
* check if a file or folder has been updated since $time
*
* @param string $path
* @param int $time
* @throws \OCP\Files\StorageNotAvailableException
* @throws \OCP\Files\StorageInvalidException
* @return bool
*/
public function hasUpdated($path, $time) {
// since for owncloud webdav servers we can rely on etag propagation we only need to check the root of the storage
// because of that we only do one check for the entire storage per request
if ($this->updateChecked) {
return false;
}
$this->updateChecked = true;
try {
return parent::hasUpdated('', $time);
} catch (StorageNotAvailableException $e) {
// see if we can find out why the share is unavailable\
try {
$this->getShareInfo();
} catch (NotFoundException $shareException) {
// a 404 can either mean that the share no longer exists or there is no ownCloud on the remote
if ($this->testRemote()) {
// valid ownCloud instance means that the public share no longer exists
// since this is permanent (re-sharing the file will create a new token)
// we remove the invalid storage
$this->manager->removeShare($this->mountPoint);
$this->manager->getMountManager()->removeMount($this->mountPoint);
throw new StorageInvalidException();
} else {
// ownCloud instance is gone, likely to be a temporary server configuration error
throw $e;
}
} catch (\Exception $shareException) {
// todo, maybe handle 403 better and ask the user for a new password
throw $e;
}
throw $e;
}
}
/**
* check if the configured remote is a valid ownCloud instance
*
* @return bool
*/
protected function testRemote() {
try {
$result = file_get_contents($this->remote . '/status.php');
$data = json_decode($result);
return is_object($data) and !empty($data->version);
} catch (\Exception $e) {
return false;
}
}
public function getShareInfo() {
$remote = $this->getRemote();
$token = $this->getToken();
$password = $this->getPassword();
$url = $remote . '/index.php/apps/files_sharing/shareinfo?t=' . $token;
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS,
http_build_query(array('password' => $password)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$result = curl_exec($ch);
$status = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
switch ($status) {
case 401:
case 403:
throw new ForbiddenException();
case 404:
throw new NotFoundException();
case 500:
throw new \Exception();
}
return json_decode($result, true);
}
}
|
