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
|
<?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\AbstractBackend {
/**
* 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` = ?)';
if (OC_Config::getValue( "dbtype") === 'oci') {
//FIXME oracle hack: need to explicitly cast CLOB to CHAR for comparison
$query = 'SELECT * FROM `*PREFIX*locks`'
.' WHERE `userid` = ? AND (`created` + `timeout`) > '.time().' AND (( to_char(`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;
//FIXME oracle hack: need to explicitly cast CLOB to CHAR for comparison
if (OC_Config::getValue( "dbtype") === 'oci') {
$query.=' OR (`depth` != 0 AND to_char(`uri`) = ?)';
} else {
$query.=' OR (`depth` != 0 AND `uri` = ?)';
}
$params[] = $currentPath;
}
if ($returnChildLocks) {
//FIXME oracle hack: need to explicitly cast CLOB to CHAR for comparison
if (OC_Config::getValue( "dbtype") === 'oci') {
$query.=' OR (to_char(`uri`) LIKE ?)';
} else {
$query.=' OR (`uri` LIKE ?)';
}
$params[] = $uri . '/%';
}
$query.=')';
$result = OC_DB::executeAudited( $query, $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) {
$exists = true;
break;
}
}
if ($exists) {
$sql = 'UPDATE `*PREFIX*locks`'
.' SET `owner` = ?, `timeout` = ?, `scope` = ?, `depth` = ?, `uri` = ?, `created` = ?'
.' WHERE `userid` = ? AND `token` = ?';
$result = OC_DB::executeAudited( $sql, array(
$lockInfo->owner,
$lockInfo->timeout,
$lockInfo->scope,
$lockInfo->depth,
$uri,
$lockInfo->created,
OC_User::getUser(),
$lockInfo->token)
);
} else {
$sql = 'INSERT INTO `*PREFIX*locks`'
.' (`userid`,`owner`,`timeout`,`scope`,`depth`,`uri`,`created`,`token`)'
.' VALUES (?,?,?,?,?,?,?,?)';
$result = OC_DB::executeAudited( $sql, 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) {
$sql = 'DELETE FROM `*PREFIX*locks` WHERE `userid` = ? AND `uri` = ? AND `token` = ?';
if (OC_Config::getValue( "dbtype") === 'oci') {
//FIXME oracle hack: need to explicitly cast CLOB to CHAR for comparison
$sql = 'DELETE FROM `*PREFIX*locks` WHERE `userid` = ? AND to_char(`uri`) = ? AND `token` = ?';
}
$result = OC_DB::executeAudited( $sql, array(OC_User::getUser(), $uri, $lockInfo->token));
return $result === 1;
}
}
|
