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 Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Christoph Wurst <christoph@winzerhof-wurst.at>
* @author Joas Schilling <coding@schilljs.com>
* @author Lukas Reschke <lukas@statuscode.ch>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
* @author Sebastian Wessalowski <sebastian@wessalowski.org>
* @author Thomas Müller <thomas.mueller@tmit.eu>
* @author Vincent Petry <vincent@nextcloud.com>
*
* @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\Cache;
use OC\Files\Filesystem;
use OC\Files\View;
use OCP\ICache;
use OCP\ILogger;
use OCP\Security\ISecureRandom;
class File implements ICache {
/** @var View */
protected $storage;
/**
* Returns the cache storage for the logged in user
*
* @return \OC\Files\View cache storage
* @throws \OC\ForbiddenException
* @throws \OC\User\NoUserException
*/
protected function getStorage() {
if ($this->storage !== null) {
return $this->storage;
}
if (\OC::$server->getUserSession()->isLoggedIn()) {
$rootView = new View();
$user = \OC::$server->getUserSession()->getUser();
Filesystem::initMountPoints($user->getUID());
if (!$rootView->file_exists('/' . $user->getUID() . '/cache')) {
$rootView->mkdir('/' . $user->getUID() . '/cache');
}
$this->storage = new View('/' . $user->getUID() . '/cache');
return $this->storage;
} else {
\OCP\Util::writeLog('core', 'Can\'t get cache storage, user not logged in', ILogger::ERROR);
throw new \OC\ForbiddenException('Can\t get cache storage, user not logged in');
}
}
/**
* @param string $key
* @return mixed|null
* @throws \OC\ForbiddenException
*/
public function get($key) {
$result = null;
if ($this->hasKey($key)) {
$storage = $this->getStorage();
$result = $storage->file_get_contents($key);
}
return $result;
}
/**
* Returns the size of the stored/cached data
*
* @param string $key
* @return int
*/
public function size($key) {
$result = 0;
if ($this->hasKey($key)) {
$storage = $this->getStorage();
$result = $storage->filesize($key);
}
return $result;
}
/**
* @param string $key
* @param mixed $value
* @param int $ttl
* @return bool|mixed
* @throws \OC\ForbiddenException
*/
public function set($key, $value, $ttl = 0) {
$storage = $this->getStorage();
$result = false;
// unique id to avoid chunk collision, just in case
$uniqueId = \OC::$server->getSecureRandom()->generate(
16,
ISecureRandom::CHAR_ALPHANUMERIC
);
// use part file to prevent hasKey() to find the key
// while it is being written
$keyPart = $key . '.' . $uniqueId . '.part';
if ($storage and $storage->file_put_contents($keyPart, $value)) {
if ($ttl === 0) {
$ttl = 86400; // 60*60*24
}
$result = $storage->touch($keyPart, time() + $ttl);
$result &= $storage->rename($keyPart, $key);
}
return $result;
}
/**
* @param string $key
* @return bool
* @throws \OC\ForbiddenException
*/
public function hasKey($key) {
$storage = $this->getStorage();
if ($storage && $storage->is_file($key) && $storage->isReadable($key)) {
return true;
}
return false;
}
/**
* @param string $key
* @return bool|mixed
* @throws \OC\ForbiddenException
*/
public function remove($key) {
$storage = $this->getStorage();
if (!$storage) {
return false;
}
return $storage->unlink($key);
}
/**
* @param string $prefix
* @return bool
* @throws \OC\ForbiddenException
*/
public function clear($prefix = '') {
$storage = $this->getStorage();
if ($storage and $storage->is_dir('/')) {
$dh = $storage->opendir('/');
if (is_resource($dh)) {
while (($file = readdir($dh)) !== false) {
if ($file != '.' and $file != '..' and ($prefix === '' || strpos($file, $prefix) === 0)) {
$storage->unlink('/' . $file);
}
}
}
}
return true;
}
/**
* Runs GC
* @throws \OC\ForbiddenException
*/
public function gc() {
$storage = $this->getStorage();
if ($storage) {
// extra hour safety, in case of stray part chunks that take longer to write,
// because touch() is only called after the chunk was finished
$now = time() - 3600;
$dh = $storage->opendir('/');
if (!is_resource($dh)) {
return null;
}
while (($file = readdir($dh)) !== false) {
if ($file != '.' and $file != '..') {
try {
$mtime = $storage->filemtime('/' . $file);
if ($mtime < $now) {
$storage->unlink('/' . $file);
}
} catch (\OCP\Lock\LockedException $e) {
// ignore locked chunks
\OC::$server->getLogger()->debug('Could not cleanup locked chunk "' . $file . '"', ['app' => 'core']);
} catch (\OCP\Files\ForbiddenException $e) {
\OC::$server->getLogger()->debug('Could not cleanup forbidden chunk "' . $file . '"', ['app' => 'core']);
} catch (\OCP\Files\LockNotAcquiredException $e) {
\OC::$server->getLogger()->debug('Could not cleanup locked chunk "' . $file . '"', ['app' => 'core']);
}
}
}
}
}
public static function isAvailable(): bool {
return true;
}
}
|