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
|
<?php
/**
* ownCloud
*
* @author Jakob Sack
* @copyright 2011 Jakob Sack kde@jakobsack.de
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
class OC_Connector_Sabre_Locks extends Sabre_DAV_Locks_Backend_Abstract {
/**
* Returns a list of Sabre_DAV_Locks_LockInfo objects
*
* This method should return all the locks for a particular uri, including
* locks that might be set on a parent uri.
*
* If returnChildLocks is set to true, this method should also look for
* any locks in the subtree of the uri for locks.
*
* @param string $uri
* @param bool $returnChildLocks
* @return array
*/
public function getLocks($uri, $returnChildLocks) {
// NOTE: the following 10 lines or so could be easily replaced by
// pure sql. MySQL's non-standard string concatination prevents us
// from doing this though.
// NOTE: SQLite requires time() to be inserted directly. That's ugly
// but otherwise reading locks from SQLite Databases will return
// nothing
$query = 'SELECT * FROM `*PREFIX*locks` WHERE `userid` = ? AND (`created` + `timeout`) > '.time().' AND (( `uri` = ?)';
$params = array(OC_User::getUser(), $uri);
// We need to check locks for every part in the uri.
$uriParts = explode('/', $uri);
// We already covered the last part of the uri
array_pop($uriParts);
$currentPath='';
foreach($uriParts as $part) {
if ($currentPath) $currentPath.='/';
$currentPath.=$part;
$query.=' OR (`depth` != 0 AND `uri` = ?)';
$params[] = $currentPath;
}
if ($returnChildLocks) {
$query.=' OR (`uri` LIKE ?)';
$params[] = $uri . '/%';
}
$query.=')';
$stmt = OC_DB::prepare( $query );
$result = $stmt->execute( $params );
$lockList = array();
while( $row = $result->fetchRow()) {
$lockInfo = new Sabre_DAV_Locks_LockInfo();
$lockInfo->owner = $row['owner'];
$lockInfo->token = $row['token'];
$lockInfo->timeout = $row['timeout'];
$lockInfo->created = $row['created'];
$lockInfo->scope = $row['scope'];
$lockInfo->depth = $row['depth'];
$lockInfo->uri = $row['uri'];
$lockList[] = $lockInfo;
}
return $lockList;
}
/**
* Locks a uri
*
* @param string $uri
* @param Sabre_DAV_Locks_LockInfo $lockInfo
* @return bool
*/
public function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
// We're making the lock timeout 5 minutes
$lockInfo->timeout = 300;
$lockInfo->created = time();
$lockInfo->uri = $uri;
$locks = $this->getLocks($uri, false);
$exists = false;
foreach($locks as $lock) {
if ($lock->token == $lockInfo->token) $exists = true;
}
if ($exists) {
$query = OC_DB::prepare( 'UPDATE `*PREFIX*locks` SET `owner` = ?, `timeout` = ?, `scope` = ?, `depth` = ?, `uri` = ?, `created` = ? WHERE `userid` = ? AND `token` = ?' );
$result = $query->execute( array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,OC_User::getUser(),$lockInfo->token));
} else {
$query = OC_DB::prepare( 'INSERT INTO `*PREFIX*locks` (`userid`,`owner`,`timeout`,`scope`,`depth`,`uri`,`created`,`token`) VALUES (?,?,?,?,?,?,?,?)' );
$result = $query->execute( array(OC_User::getUser(),$lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
}
return true;
}
/**
* Removes a lock from a uri
*
* @param string $uri
* @param Sabre_DAV_Locks_LockInfo $lockInfo
* @return bool
*/
public function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
$query = OC_DB::prepare( 'DELETE FROM `*PREFIX*locks` WHERE `userid` = ? AND `uri` = ? AND `token` = ?' );
$result = $query->execute( array(OC_User::getUser(), $uri, $lockInfo->token));
return $result->numRows() === 1;
}
}
|
