nextcloud/apps/files_external/lib/swift.php

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<?php
/**
* Copyright (c) 2012 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
require_once('php-cloudfiles/cloudfiles.php');
class OC_FileStorage_SWIFT extends OC_Filestorage_Common{
private $host;
private $root;
private $user;
private $token;
private $secure;
/**
* @var CF_Authentication auth
*/
private $auth;
/**
* @var CF_Connection conn
*/
private $conn;
/**
* @var CF_Container rootContainer
*/
private $rootContainer;
private static $tempFiles=array();
private $objects=array();
private $containers=array();
const SUBCONTAINER_FILE='.subcontainers';
/**
* translate directory path to container name
* @param string path
* @return string
*/
private function getContainerName($path){
$path=trim($this->root.$path,'/');
return str_replace('/','\\',$path);
}
/**
* get container by path
* @param string path
* @return CF_Container
*/
private function getContainer($path){
if($path=='' or $path=='/'){
return $this->rootContainer;
}
if(isset($this->containers[$path])){
return $this->containers[$path];
}
try{
$container=$this->conn->get_container($this->getContainerName($path));
$this->containers[$path]=$container;
return $container;
}catch(NoSuchContainerException $e){
return null;
}
}
/**
* create container
* @param string path
* @return CF_Container
*/
private function createContainer($path){
if($path=='' or $path=='/'){
return $this->conn->create_container($this->getContainerName($path));
}
$parent=dirname($path);
if($parent=='' or $parent=='/'){
$parentContainer=$this->rootContainer;
}else{
if(!$this->containerExists($parent)){
$parentContainer=$this->createContainer($parent);
}else{
$parentContainer=$this->getContainer($parent);
}
}
$this->addSubContainer($parentContainer,basename($path));
return $this->conn->create_container($this->getContainerName($path));
}
/**
* get object by path
* @param string path
* @return CF_Object
*/
private function getObject($path){
if(isset($this->objects[$path])){
return $this->objects[$path];
}
$container=$this->getContainer(dirname($path));
if(is_null($container)){
return null;
}else{
try{
$obj=$container->get_object(basename($path));
$this->objects[$path]=$obj;
return $obj;
}catch(NoSuchObjectException $e){
return null;
}
}
}
/**
* get the names of all objects in a container
* @param CF_Container
* @return array
*/
private function getObjects($container){
if(is_null($container)){
return array();
}else{
$files=$container->get_objects();
foreach($files as &$file){
$file=$file->name;
}
return $files;
}
}
/**
* create object
* @param string path
* @return CF_Object
*/
private function createObject($path){
$container=$this->getContainer(dirname($path));
if(!is_null($container)){
$container=$this->createContainer($path);
}
return $container->create_object(basename($path));
}
/**
* check if an object exists
* @param string
* @return bool
*/
private function objectExists($path){
return !is_null($this->getObject($path));
}
/**
* check if container for path exists
* @param string path
* @return bool
*/
private function containerExists($path){
return !is_null($this->getContainer($path));
}
/**
* get the list of emulated sub containers
* @param CF_Container container
* @return array
*/
private function getSubContainers($container){
$tmpFile=OC_Helper::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
}catch(Exception $e){
return array();
}
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
unlink($tmpFile);
foreach($containers as &$sub){
$sub=trim($sub);
}
return $containers;
}
/**
* add an emulated sub container
* @param CF_Container container
* @param string name
* @return bool
*/
private function addSubContainer($container,$name){
if(!$name){
return false;
}
$tmpFile=OC_Helper::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
foreach($containers as &$sub){
$sub=trim($sub);
}
if(array_search($name,$containers)!==false){
unlink($tmpFile);
return false;
}else{
$fh=fopen($tmpFile,'a');
fwrite($fh,$name."\n");
}
}catch(Exception $e){
$containers=array();
file_put_contents($tmpFile,$name."\n");
}
$obj->load_from_filename($tmpFile);
unlink($tmpFile);
return true;
}
/**
* remove an emulated sub container
* @param CF_Container container
* @param string name
* @return bool
*/
private function removeSubContainer($container,$name){
if(!$name){
return false;
}
$tmpFile=OC_Helper::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
}catch(Exception $e){
return false;
}
foreach($containers as &$sub){
$sub=trim($sub);
}
$i=array_search($name,$containers);
if($i===false){
unlink($tmpFile);
return false;
}else{
unset($containers[$i]);
file_put_contents($tmpFile,implode("\n",$containers)."\n");
}
$obj->load_from_filename($tmpFile);
unlink($tmpFile);
return true;
}
/**
* ensure a subcontainer file exists and return it's object
* @param CF_Container container
* @return CF_Object
*/
private function getSubContainerFile($container){
try{
return $container->get_object(self::SUBCONTAINER_FILE);
}catch(NoSuchObjectException $e){
return $container->create_object(self::SUBCONTAINER_FILE);
}
}
public function __construct($params){
$this->token=$params['token'];
$this->host=$params['host'];
$this->user=$params['user'];
$this->root=isset($params['root'])?$params['root']:'/';
$this->secure=isset($params['secure'])?(bool)$params['secure']:true;
if(substr($this->root,0,1)!='/'){
$this->root='/'.$this->root;
}
$this->auth = new CF_Authentication($this->user, $this->token, null, $this->host);
$this->auth->authenticate();
$this->conn = new CF_Connection($this->auth);
if(!$this->containerExists($this->root)){
$this->rootContainer=$this->createContainer('/');
}else{
$this->rootContainer=$this->getContainer('/');
}
}
public function mkdir($path){
if($this->containerExists($path)){
return false;
}else{
$this->createContainer($path);
return true;
}
}
public function rmdir($path){
if(!$this->containerExists($path)){
return false;
}else{
$this->emptyContainer($path);
if($path!='' and $path!='/'){
$parentContainer=$this->getContainer(dirname($path));
$this->removeSubContainer($parentContainer,basename($path));
}
$this->conn->delete_container($this->getContainerName($path));
unset($this->containers[$path]);
return true;
}
}
private function emptyContainer($path){
$container=$this->getContainer($path);
if(is_null($container)){
return;
}
$subContainers=$this->getSubContainers($container);
foreach($subContainers as $sub){
if($sub){
$this->emptyContainer($path.'/'.$sub);
$this->conn->delete_container($this->getContainerName($path.'/'.$sub));
unset($this->containers[$path.'/'.$sub]);
}
}
$objects=$this->getObjects($container);
foreach($objects as $object){
$container->delete_object($object);
unset($this->objects[$path.'/'.$object]);
}
}
public function opendir($path){
$container=$this->getContainer($path);
$files=$this->getObjects($container);
$i=array_search(self::SUBCONTAINER_FILE,$files);
if($i!==false){
unset($files[$i]);
}
$subContainers=$this->getSubContainers($container);
$files=array_merge($files,$subContainers);
$id=$this->getContainerName($path);
OC_FakeDirStream::$dirs[$id]=$files;
return opendir('fakedir://'.$id);
}
public function filetype($path){
if($this->containerExists($path)){
return 'dir';
}else{
return 'file';
}
}
public function is_readable($path){
return true;
}
public function is_writable($path){
return true;
}
public function file_exists($path){
if($this->is_dir($path)){
return true;
}else{
return $this->objectExists($path);
}
}
public function file_get_contents($path){
$obj=$this->getObject($path);
if(is_null($obj)){
return false;
}
return $obj->read();
}
public function file_put_contents($path,$content){
$obj=$this->getObject($path);
if(is_null($obj)){
$container=$this->getContainer(dirname($path));
if(is_null($container)){
return false;
}
$obj=$container->create_object(basename($path));
}
$this->resetMTime($obj);
return $obj->write($content);
}
public function unlink($path){
if($this->objectExists($path)){
$container=$this->getContainer(dirname($path));
$container->delete_object(basename($path));
unset($this->objects[$path]);
}else{
return false;
}
}
public function fopen($path,$mode){
$obj=$this->getObject($path);
if(is_null($obj)){
return false;
}
switch($mode){
case 'r':
case 'rb':
$fp = fopen('php://temp', 'r+');
$obj->stream($fp);
rewind($fp);
return $fp;
case 'w':
case 'wb':
case 'a':
case 'ab':
case 'r+':
case 'w+':
case 'wb+':
case 'a+':
case 'x':
case 'x+':
case 'c':
case 'c+':
$tmpFile=$this->getTmpFile($path);
OC_CloseStreamWrapper::$callBacks[$tmpFile]=array($this,'writeBack');
self::$tempFiles[$tmpFile]=$path;
return fopen('close://'.$tmpFile,$mode);
}
}
public function writeBack($tmpFile){
if(isset(self::$tempFiles[$tmpFile])){
$this->fromTmpFile($tmpFile,self::$tempFiles[$tmpFile]);
unlink($tmpFile);
}
}
public function free_space($path){
return 0;
}
public function touch($path,$mtime=null){
$obj=$this->getObject($path);
if(is_null($obj)){
return false;
}
if(is_null($mtime)){
$mtime=time();
}
//emulate setting mtime with metadata
$obj->metadata['Mtime']=$mtime;
$obj->sync_metadata();
}
public function rename($path1,$path2){
$sourceContainer=$this->getContainer(dirname($path1));
$targetContainer=$this->getContainer(dirname($path2));
$result=$sourceContainer->move_object_to(basename($path1),$targetContainer,basename($path2));
unset($this->objects[$path1]);
if($result){
$targetObj=$this->getObject($path2);
$this->resetMTime($targetObj);
}
return $result;
}
public function copy($path1,$path2){
$sourceContainer=$this->getContainer(dirname($path1));
$targetContainer=$this->getContainer(dirname($path2));
$result=$sourceContainer->copy_object_to(basename($path1),$targetContainer,basename($path2));
if($result){
$targetObj=$this->getObject($path2);
$this->resetMTime($targetObj);
}
return $result;
}
public function stat($path){
$obj=$this->getObject($path);
if(is_null($obj)){
return false;
}
if(isset($obj->metadata['Mtime']) and $obj->metadata['Mtime']>-1){
$mtime=$obj->metadata['Mtime'];
}else{
$mtime=strtotime($obj->last_modified);
}
return array(
'mtime'=>$mtime,
'size'=>$obj->content_length,
'ctime'=>-1,
);
}
private function getTmpFile($path){
$obj=$this->getObject($path);
if(!is_null($obj)){
$tmpFile=OC_Helper::tmpFile();
$obj->save_to_filename($tmpFile);
return $tmpFile;
}else{
return false;
}
}
private function fromTmpFile($tmpFile,$path){
$obj=$this->getObject($path);
if(is_null($obj)){
$obj=$this->createObject($path);
}
$obj->load_from_filename($tmpFile);
$this->resetMTime($obj);
}
/**
* remove custom mtime metadata
* @param CF_Object obj
*/
private function resetMTime($obj){
if(isset($obj->metadata['Mtime'])){
$obj->metadata['Mtime']=-1;
$obj->sync_metadata();
}
}
}