Version 3.2.3
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<?php
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/**
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* The Lock manager allows you to handle all file-locks centrally.
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*
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* This is an alternative approach to doing this on a per-node basis
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2010 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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abstract class Sabre_DAV_Locks_Backend_Abstract {
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/**
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* Returns a list of Sabre_DAV_Locks_LockInfo objects
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*
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* This method should return all the locks for a particular uri, including
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* locks that might be set on a parent uri.
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*
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* @param string $uri
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* @return array
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*/
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abstract function getLocks($uri);
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/**
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* Locks a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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abstract function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
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/**
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* Removes a lock from a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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abstract function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo);
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}
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@@ -0,0 +1,180 @@
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<?php
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/**
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* The Lock manager allows you to handle all file-locks centrally.
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*
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* This Lock Manager stores all its data in the filesystem. By default it will do this in PHP's standard temporary session directory,
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* but this can be overriden by specifiying an alternative path in the contructor
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2010 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_DAV_Locks_Backend_FS extends Sabre_DAV_Locks_Backend_Abstract {
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/**
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* The default data directory
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*
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* @var string
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*/
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private $dataDir;
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public function __construct($dataDir) {
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$this->dataDir = $dataDir;
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}
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protected function getFileNameForUri($uri) {
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return $this->dataDir . '/sabredav_' . md5($uri) . '.locks';
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}
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/**
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* Returns a list of Sabre_DAV_Locks_LockInfo objects
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*
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* This method should return all the locks for a particular uri, including
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* locks that might be set on a parent uri.
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*
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* @param string $uri
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* @return array
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*/
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public function getLocks($uri) {
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$lockList = array();
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$currentPath = '';
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foreach(explode('/',$uri) as $uriPart) {
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// weird algorithm that can probably be improved, but we're traversing the path top down
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if ($currentPath) $currentPath.='/';
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$currentPath.=$uriPart;
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$uriLocks = $this->getData($currentPath);
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foreach($uriLocks as $uriLock) {
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// Unless we're on the leaf of the uri-tree we should ingore locks with depth 0
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if($uri==$currentPath || $uriLock->depth!=0) {
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$uriLock->uri = $currentPath;
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$lockList[] = $uriLock;
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}
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}
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}
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// Checking if we can remove any of these locks
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foreach($lockList as $k=>$lock) {
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if (time() > $lock->timeout + $lock->created) unset($lockList[$k]);
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}
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return $lockList;
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}
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/**
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* Locks a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
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// We're making the lock timeout 30 minutes
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$lockInfo->timeout = 1800;
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$lockInfo->created = time();
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$locks = $this->getLocks($uri);
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foreach($locks as $k=>$lock) {
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if ($lock->token == $lockInfo->token) unset($locks[$k]);
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}
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$locks[] = $lockInfo;
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$this->putData($uri,$locks);
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return true;
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}
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/**
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* Removes a lock from a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
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$locks = $this->getLocks($uri);
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foreach($locks as $k=>$lock) {
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if ($lock->token == $lockInfo->token) {
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unset($locks[$k]);
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$this->putData($uri,$locks);
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return true;
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}
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}
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return false;
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}
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/**
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* Returns the stored data for a uri
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*
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* @param string $uri
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* @return array
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*/
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protected function getData($uri) {
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$path = $this->getFilenameForUri($uri);
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if (!file_exists($path)) return array();
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// opening up the file, and creating a shared lock
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$handle = fopen($path,'r');
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flock($handle,LOCK_SH);
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$data = '';
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// Reading data until the eof
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while(!feof($handle)) {
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$data.=fread($handle,8192);
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}
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// We're all good
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fclose($handle);
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// Unserializing and checking if the resource file contains data for this file
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$data = unserialize($data);
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if (!$data) return array();
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return $data;
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}
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/**
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* Updates the lock information
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*
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* @param string $uri
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* @param array $newData
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* @return void
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*/
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protected function putData($uri,array $newData) {
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$path = $this->getFileNameForUri($uri);
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// opening up the file, and creating a shared lock
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$handle = fopen($path,'a+');
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flock($handle,LOCK_EX);
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ftruncate($handle,0);
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rewind($handle);
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fwrite($handle,serialize($newData));
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fclose($handle);
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}
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}
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@@ -0,0 +1,141 @@
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<?php
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/**
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* The Lock manager allows you to handle all file-locks centrally.
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*
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* This Lock Manager stores all its data in a database. You must pass a PDO
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* connection object in the constructor.
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*
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* @package Sabre
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* @subpackage DAV
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* @copyright Copyright (C) 2007-2010 Rooftop Solutions. All rights reserved.
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* @author Evert Pot (http://www.rooftopsolutions.nl/)
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* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
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*/
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class Sabre_DAV_Locks_Backend_PDO extends Sabre_DAV_Locks_Backend_Abstract {
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/**
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* The PDO connection object
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*
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* @var pdo
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*/
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private $pdo;
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public function __construct(PDO $pdo) {
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$this->pdo = $pdo;
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}
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/**
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* Returns a list of Sabre_DAV_Locks_LockInfo objects
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*
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* This method should return all the locks for a particular uri, including
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* locks that might be set on a parent uri.
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*
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* @param string $uri
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* @return array
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*/
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public function getLocks($uri) {
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// NOTE: the following 10 lines or so could be easily replaced by
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// pure sql. MySQL's non-standard string concatination prevents us
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// from doing this though.
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$query = 'SELECT owner, token, timeout, created, scope, depth, uri FROM locks WHERE ((created + timeout) > CAST(? AS UNSIGNED INTEGER)) AND ((uri = ?)';
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$params = array(time(),$uri);
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// We need to check locks for every part in the uri.
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$uriParts = explode('/',$uri);
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// We already covered the last part of the uri
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array_pop($uriParts);
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$currentPath='';
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foreach($uriParts as $part) {
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if ($currentPath) $currentPath.='/';
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$currentPath.=$part;
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$query.=' OR (depth!=0 AND uri = ?)';
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$params[] = $currentPath;
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}
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$query.=')';
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$stmt = $this->pdo->prepare($query);
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$stmt->execute($params);
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$result = $stmt->fetchAll();
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$lockList = array();
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foreach($result as $row) {
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$lockInfo = new Sabre_DAV_Locks_LockInfo();
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$lockInfo->owner = $row['owner'];
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$lockInfo->token = $row['token'];
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$lockInfo->timeout = $row['timeout'];
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$lockInfo->created = $row['created'];
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$lockInfo->scope = $row['scope'];
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$lockInfo->depth = $row['depth'];
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$lockInfo->uri = $row['uri'];
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$lockList[] = $lockInfo;
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}
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return $lockList;
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}
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/**
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* Locks a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function lock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
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// We're making the lock timeout 30 minutes
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$lockInfo->timeout = 30*60;
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$lockInfo->created = time();
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$lockInfo->uri = $uri;
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$locks = $this->getLocks($uri);
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$exists = false;
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foreach($locks as $k=>$lock) {
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if ($lock->token == $lockInfo->token) $exists = true;
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}
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if ($exists) {
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$stmt = $this->pdo->prepare('UPDATE locks SET owner = ?, timeout = ?, scope = ?, depth = ?, uri = ?, created = ? WHERE token = ?');
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$stmt->execute(array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
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} else {
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$stmt = $this->pdo->prepare('INSERT INTO locks (owner,timeout,scope,depth,uri,created,token) VALUES (?,?,?,?,?,?,?)');
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$stmt->execute(array($lockInfo->owner,$lockInfo->timeout,$lockInfo->scope,$lockInfo->depth,$uri,$lockInfo->created,$lockInfo->token));
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}
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return true;
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}
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/**
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* Removes a lock from a uri
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*
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* @param string $uri
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* @param Sabre_DAV_Locks_LockInfo $lockInfo
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* @return bool
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*/
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public function unlock($uri,Sabre_DAV_Locks_LockInfo $lockInfo) {
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$stmt = $this->pdo->prepare('DELETE FROM locks WHERE uri = ? AND token = ?');
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$stmt->execute(array($uri,$lockInfo->token));
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return $stmt->rowCount()===1;
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}
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}
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@@ -0,0 +1,10 @@
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<html>
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<head><title>IP.Board - Bulletin Board System</title></head>
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<body>
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<h1>403: IP.Board -> Forbidden</h1>
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<hr>
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You have reached this page in error, please use your back button to return to the forum.
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<hr>
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<a href="http://www.invisionpower.com/">IP.Board</a>
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</body>
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</html>
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