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.
*/
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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 $containers=array();
const SUBCONTAINER_FILE='.subcontainers';
/**
* translate directory path to container name
* @param string path
* @return string
*/
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private function getContainerName($path) {
$path=trim($this->root.$path,'/');
return str_replace('/','\\',$path);
}
/**
* get container by path
* @param string path
* @return CF_Container
*/
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private function getContainer($path) {
if($path=='' or $path=='/') {
return $this->rootContainer;
}
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if(isset($this->containers[$path])) {
return $this->containers[$path];
}
try{
$container=$this->conn->get_container($this->getContainerName($path));
$this->containers[$path]=$container;
return $container;
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}catch(NoSuchContainerException $e) {
return null;
}
}
/**
* create container
* @param string path
* @return CF_Container
*/
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private function createContainer($path) {
if($path=='' or $path=='/') {
return $this->conn->create_container($this->getContainerName($path));
}
$parent=dirname($path);
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if($parent=='' or $parent=='/') {
$parentContainer=$this->rootContainer;
}else{
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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($path));
}
/**
* get object by path
* @param string path
* @return CF_Object
*/
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private function getObject($path) {
if(isset($this->objects[$path])) {
return $this->objects[$path];
}
$container=$this->getContainer(dirname($path));
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if(is_null($container)) {
return null;
}else{
try{
$obj=$container->get_object(basename($path));
$this->objects[$path]=$obj;
return $obj;
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}catch(NoSuchObjectException $e) {
return null;
}
}
}
/**
* get the names of all objects in a container
* @param CF_Container
* @return array
*/
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private function getObjects($container) {
if(is_null($container)) {
return array();
}else{
$files=$container->get_objects();
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foreach($files as &$file) {
$file=$file->name;
}
return $files;
}
}
/**
* create object
* @param string path
* @return CF_Object
*/
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private function createObject($path) {
$container=$this->getContainer(dirname($path));
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if(!is_null($container)) {
$container=$this->createContainer($path);
}
return $container->create_object(basename($path));
}
/**
* check if an object exists
* @param string
* @return bool
*/
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private function objectExists($path) {
return !is_null($this->getObject($path));
}
/**
* check if container for path exists
* @param string path
* @return bool
*/
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private function containerExists($path) {
return !is_null($this->getContainer($path));
}
/**
* get the list of emulated sub containers
* @param CF_Container container
* @return array
*/
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private function getSubContainers($container) {
$tmpFile=OCP\Files::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
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}catch(Exception $e) {
return array();
}
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
unlink($tmpFile);
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foreach($containers as &$sub) {
$sub=trim($sub);
}
return $containers;
}
/**
* add an emulated sub container
* @param CF_Container container
* @param string name
* @return bool
*/
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private function addSubContainer($container,$name) {
if(!$name) {
return false;
}
$tmpFile=OCP\Files::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
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foreach($containers as &$sub) {
$sub=trim($sub);
}
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if(array_search($name,$containers)!==false) {
unlink($tmpFile);
return false;
}else{
$fh=fopen($tmpFile,'a');
fwrite($fh,$name."\n");
}
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}catch(Exception $e) {
$containers=array();
file_put_contents($tmpFile,$name."\n");
}
$obj->load_from_filename($tmpFile);
unlink($tmpFile);
return true;
}
/**
* remove an emulated sub container
* @param CF_Container container
* @param string name
* @return bool
*/
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private function removeSubContainer($container,$name) {
if(!$name) {
return false;
}
$tmpFile=OCP\Files::tmpFile();
$obj=$this->getSubContainerFile($container);
try{
$obj->save_to_filename($tmpFile);
$containers=file($tmpFile);
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}catch(Exception $e) {
return false;
}
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foreach($containers as &$sub) {
$sub=trim($sub);
}
$i=array_search($name,$containers);
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if($i===false) {
unlink($tmpFile);
return false;
}else{
unset($containers[$i]);
file_put_contents($tmpFile,implode("\n",$containers)."\n");
}
$obj->load_from_filename($tmpFile);
unlink($tmpFile);
return true;
}
/**
* ensure a subcontainer file exists and return it's object
* @param CF_Container container
* @return CF_Object
*/
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private function getSubContainerFile($container) {
try{
return $container->get_object(self::SUBCONTAINER_FILE);
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}catch(NoSuchObjectException $e) {
return $container->create_object(self::SUBCONTAINER_FILE);
}
}
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public function __construct($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)$params['secure']:true;
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if(!$this->root || $this->root[0]!='/') {
$this->root='/'.$this->root;
}
$this->auth = new CF_Authentication($this->user, $this->token, null, $this->host);
$this->auth->authenticate();
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$this->conn = new CF_Connection($this->auth);
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if(!$this->containerExists($this->root)) {
$this->rootContainer=$this->createContainer('/');
}else{
$this->rootContainer=$this->getContainer('/');
}
}
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public function mkdir($path) {
if($this->containerExists($path)) {
return false;
}else{
$this->createContainer($path);
return true;
}
}
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public function rmdir($path) {
if(!$this->containerExists($path)) {
return false;
}else{
$this->emptyContainer($path);
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if($path!='' and $path!='/') {
$parentContainer=$this->getContainer(dirname($path));
$this->removeSubContainer($parentContainer,basename($path));
}
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$this->conn->delete_container($this->getContainerName($path));
unset($this->containers[$path]);
return true;
}
}
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private function emptyContainer($path) {
$container=$this->getContainer($path);
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if(is_null($container)) {
return;
}
$subContainers=$this->getSubContainers($container);
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foreach($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($container);
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foreach($objects as $object) {
$container->delete_object($object);
unset($this->objects[$path.'/'.$object]);
}
}
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public function opendir($path) {
$container=$this->getContainer($path);
$files=$this->getObjects($container);
$i=array_search(self::SUBCONTAINER_FILE,$files);
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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://'.$id);
}
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public function filetype($path) {
if($this->containerExists($path)) {
return 'dir';
}else{
return 'file';
}
}
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public function isReadable($path) {
return true;
}
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public function isUpdatable($path) {
return true;
}
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public function file_exists($path) {
if($this->is_dir($path)) {
return true;
}else{
return $this->objectExists($path);
}
}
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public function file_get_contents($path) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
return false;
}
return $obj->read();
}
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public function file_put_contents($path,$content) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
$container=$this->getContainer(dirname($path));
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if(is_null($container)) {
return false;
}
$obj=$container->create_object(basename($path));
}
$this->resetMTime($obj);
return $obj->write($content);
}
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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;
}
}
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public function fopen($path,$mode) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
return false;
}
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switch($mode) {
case 'r':
case 'rb':
$fp = fopen('php://temp', 'r+');
$obj->stream($fp);
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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,$mode);
}
}
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public function writeBack($tmpFile) {
if(isset(self::$tempFiles[$tmpFile])) {
$this->fromTmpFile($tmpFile,self::$tempFiles[$tmpFile]);
unlink($tmpFile);
}
}
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public function free_space($path) {
return 0;
}
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public function touch($path,$mtime=null) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
return false;
}
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if(is_null($mtime)) {
$mtime=time();
}
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//emulate setting mtime with metadata
$obj->metadata['Mtime']=$mtime;
$obj->sync_metadata();
}
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public function rename($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[$path1]);
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if($result) {
$targetObj=$this->getObject($path2);
$this->resetMTime($targetObj);
}
return $result;
}
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public function copy($path1,$path2) {
$sourceContainer=$this->getContainer(dirname($path1));
$targetContainer=$this->getContainer(dirname($path2));
$result=$sourceContainer->copy_object_to(basename($path1),$targetContainer,basename($path2));
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if($result) {
$targetObj=$this->getObject($path2);
$this->resetMTime($targetObj);
}
return $result;
}
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public function stat($path) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
return false;
}
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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,
);
}
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private function getTmpFile($path) {
$obj=$this->getObject($path);
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if(!is_null($obj)) {
$tmpFile=OCP\Files::tmpFile();
$obj->save_to_filename($tmpFile);
return $tmpFile;
}else{
return false;
}
}
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private function fromTmpFile($tmpFile,$path) {
$obj=$this->getObject($path);
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if(is_null($obj)) {
$obj=$this->createObject($path);
}
$obj->load_from_filename($tmpFile);
$this->resetMTime($obj);
}
/**
* remove custom mtime metadata
* @param CF_Object obj
*/
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private function resetMTime($obj) {
if(isset($obj->metadata['Mtime'])) {
$obj->metadata['Mtime']=-1;
$obj->sync_metadata();
}
}
}