/usr/share/php/sabre21/Sabre/DAV/Locks/Backend/PDO.php is in php-sabre-dav-2.1 2.1.10-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | <?php
namespace Sabre\DAV\Locks\Backend;
use Sabre\DAV\Locks\LockInfo;
/**
* The Lock manager allows you to handle all file-locks centrally.
*
* This Lock Manager stores all its data in a database. You must pass a PDO
* connection object in the constructor.
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class PDO extends AbstractBackend {
/**
* The PDO tablename this backend uses.
*
* @var string
*/
public $tableName = 'locks';
/**
* The PDO connection object
*
* @var pdo
*/
protected $pdo;
/**
* Constructor
*
* @param PDO $pdo
* @param string $tableName
* @deprecated We are removing the tableName property in a future version
* of sabredav. Use the public property instead.
*/
function __construct(\PDO $pdo, $tableName = 'locks') {
$this->pdo = $pdo;
$this->tableName = $tableName;
}
/**
* 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 $returnChildLocks
* @return array
*/
function getLocks($uri, $returnChildLocks) {
// NOTE: the following 10 lines or so could be easily replaced by
// pure sql. MySQL's non-standard string concatenation prevents us
// from doing this though.
$query = 'SELECT owner, token, timeout, created, scope, depth, uri FROM '.$this->tableName.' WHERE ((created + timeout) > CAST(? AS UNSIGNED INTEGER)) AND ((uri = ?)';
$params = [time(),$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 = $this->pdo->prepare($query);
$stmt->execute($params);
$result = $stmt->fetchAll();
$lockList = [];
foreach($result as $row) {
$lockInfo = new 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 LockInfo $lockInfo
* @return bool
*/
function lock($uri, LockInfo $lockInfo) {
// We're making the lock timeout 30 minutes
$lockInfo->timeout = 30*60;
$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) {
$stmt = $this->pdo->prepare('UPDATE '.$this->tableName.' SET owner = ?, timeout = ?, scope = ?, depth = ?, uri = ?, created = ? WHERE token = ?');
$stmt->execute([
$lockInfo->owner,
$lockInfo->timeout,
$lockInfo->scope,
$lockInfo->depth,
$uri,
$lockInfo->created,
$lockInfo->token
]);
} else {
$stmt = $this->pdo->prepare('INSERT INTO '.$this->tableName.' (owner,timeout,scope,depth,uri,created,token) VALUES (?,?,?,?,?,?,?)');
$stmt->execute([
$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 LockInfo $lockInfo
* @return bool
*/
function unlock($uri, LockInfo $lockInfo) {
$stmt = $this->pdo->prepare('DELETE FROM '.$this->tableName.' WHERE uri = ? AND token = ?');
$stmt->execute([$uri, $lockInfo->token]);
return $stmt->rowCount()===1;
}
}
|