CasperSecurity
<?php
namespace League\Flysystem\Adapter;
use DirectoryIterator;
use FilesystemIterator;
use finfo as Finfo;
use League\Flysystem\Config;
use League\Flysystem\Exception;
use League\Flysystem\NotSupportedException;
use League\Flysystem\UnreadableFileException;
use League\Flysystem\Util;
use LogicException;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use SplFileInfo;
class Local extends AbstractAdapter
{
/**
* @var int
*/
const SKIP_LINKS = 0001;
/**
* @var int
*/
const DISALLOW_LINKS = 0002;
/**
* @var array
*/
protected static $permissions = [
'file' => [
'public' => 0644,
'private' => 0600,
],
'dir' => [
'public' => 0755,
'private' => 0700,
],
];
/**
* @var string
*/
protected $pathSeparator = DIRECTORY_SEPARATOR;
/**
* @var array
*/
protected $permissionMap;
/**
* @var int
*/
protected $writeFlags;
/**
* @var int
*/
private $linkHandling;
/**
* Constructor.
*
* @param string $root
* @param int $writeFlags
* @param int $linkHandling
* @param array $permissions
*
* @throws LogicException
*/
public function __construct($root, $writeFlags = LOCK_EX, $linkHandling = self::DISALLOW_LINKS, array $permissions = [])
{
$root = is_link($root) ? realpath($root) : $root;
$this->permissionMap = array_replace_recursive(static::$permissions, $permissions);
$this->ensureDirectory($root);
if ( ! is_dir($root) || ! is_readable($root)) {
throw new LogicException('The root path ' . $root . ' is not readable.');
}
$this->setPathPrefix($root);
$this->writeFlags = $writeFlags;
$this->linkHandling = $linkHandling;
}
/**
* Ensure the root directory exists.
*
* @param string $root root directory path
*
* @return void
*
* @throws Exception in case the root directory can not be created
*/
protected function ensureDirectory($root)
{
if ( ! is_dir($root)) {
$umask = umask(0);
if ( ! @mkdir($root, $this->permissionMap['dir']['public'], true)) {
$mkdirError = error_get_last();
}
umask($umask);
clearstatcache(false, $root);
if ( ! is_dir($root)) {
$errorMessage = isset($mkdirError['message']) ? $mkdirError['message'] : '';
throw new Exception(sprintf('Impossible to create the root directory "%s". %s', $root, $errorMessage));
}
}
}
/**
* @inheritdoc
*/
public function has($path)
{
$location = $this->applyPathPrefix($path);
return file_exists($location);
}
/**
* @inheritdoc
*/
public function write($path, $contents, Config $config)
{
$location = $this->applyPathPrefix($path);
$this->ensureDirectory(dirname($location));
if (($size = file_put_contents($location, $contents, $this->writeFlags)) === false) {
return false;
}
$type = 'file';
$result = compact('contents', 'type', 'size', 'path');
if ($visibility = $config->get('visibility')) {
$result['visibility'] = $visibility;
$this->setVisibility($path, $visibility);
}
return $result;
}
/**
* @inheritdoc
*/
public function writeStream($path, $resource, Config $config)
{
$location = $this->applyPathPrefix($path);
$this->ensureDirectory(dirname($location));
$stream = fopen($location, 'w+b');
if ( ! $stream || stream_copy_to_stream($resource, $stream) === false || ! fclose($stream)) {
return false;
}
$type = 'file';
$result = compact('type', 'path');
if ($visibility = $config->get('visibility')) {
$this->setVisibility($path, $visibility);
$result['visibility'] = $visibility;
}
return $result;
}
/**
* @inheritdoc
*/
public function readStream($path)
{
$location = $this->applyPathPrefix($path);
$stream = fopen($location, 'rb');
return ['type' => 'file', 'path' => $path, 'stream' => $stream];
}
/**
* @inheritdoc
*/
public function updateStream($path, $resource, Config $config)
{
return $this->writeStream($path, $resource, $config);
}
/**
* @inheritdoc
*/
public function update($path, $contents, Config $config)
{
$location = $this->applyPathPrefix($path);
$size = file_put_contents($location, $contents, $this->writeFlags);
if ($size === false) {
return false;
}
$type = 'file';
$result = compact('type', 'path', 'size', 'contents');
if ($visibility = $config->get('visibility')) {
$this->setVisibility($path, $visibility);
$result['visibility'] = $visibility;
}
return $result;
}
/**
* @inheritdoc
*/
public function read($path)
{
$location = $this->applyPathPrefix($path);
$contents = @file_get_contents($location);
if ($contents === false) {
return false;
}
return ['type' => 'file', 'path' => $path, 'contents' => $contents];
}
/**
* @inheritdoc
*/
public function rename($path, $newpath)
{
$location = $this->applyPathPrefix($path);
$destination = $this->applyPathPrefix($newpath);
$parentDirectory = $this->applyPathPrefix(Util::dirname($newpath));
$this->ensureDirectory($parentDirectory);
return rename($location, $destination);
}
/**
* @inheritdoc
*/
public function copy($path, $newpath)
{
$location = $this->applyPathPrefix($path);
$destination = $this->applyPathPrefix($newpath);
$this->ensureDirectory(dirname($destination));
return copy($location, $destination);
}
/**
* @inheritdoc
*/
public function delete($path)
{
$location = $this->applyPathPrefix($path);
return @unlink($location);
}
/**
* @inheritdoc
*/
public function listContents($directory = '', $recursive = false)
{
$result = [];
$location = $this->applyPathPrefix($directory);
if ( ! is_dir($location)) {
return [];
}
$iterator = $recursive ? $this->getRecursiveDirectoryIterator($location) : $this->getDirectoryIterator($location);
foreach ($iterator as $file) {
$path = $this->getFilePath($file);
if (preg_match('#(^|/|\\\\)\.{1,2}$#', $path)) {
continue;
}
$result[] = $this->normalizeFileInfo($file);
}
unset($iterator);
return array_filter($result);
}
/**
* @inheritdoc
*/
public function getMetadata($path)
{
$location = $this->applyPathPrefix($path);
clearstatcache(false, $location);
$info = new SplFileInfo($location);
return $this->normalizeFileInfo($info);
}
/**
* @inheritdoc
*/
public function getSize($path)
{
return $this->getMetadata($path);
}
/**
* @inheritdoc
*/
public function getMimetype($path)
{
$location = $this->applyPathPrefix($path);
$finfo = new Finfo(FILEINFO_MIME_TYPE);
$mimetype = $finfo->file($location);
if (in_array($mimetype, ['application/octet-stream', 'inode/x-empty', 'application/x-empty'])) {
$mimetype = Util\MimeType::detectByFilename($location);
}
return ['path' => $path, 'type' => 'file', 'mimetype' => $mimetype];
}
/**
* @inheritdoc
*/
public function getTimestamp($path)
{
return $this->getMetadata($path);
}
/**
* @inheritdoc
*/
public function getVisibility($path)
{
$location = $this->applyPathPrefix($path);
clearstatcache(false, $location);
$permissions = octdec(substr(sprintf('%o', fileperms($location)), -4));
$type = is_dir($location) ? 'dir' : 'file';
foreach ($this->permissionMap[$type] as $visibility => $visibilityPermissions) {
if ($visibilityPermissions == $permissions) {
return compact('path', 'visibility');
}
}
$visibility = substr(sprintf('%o', fileperms($location)), -4);
return compact('path', 'visibility');
}
/**
* @inheritdoc
*/
public function setVisibility($path, $visibility)
{
$location = $this->applyPathPrefix($path);
$type = is_dir($location) ? 'dir' : 'file';
$success = chmod($location, $this->permissionMap[$type][$visibility]);
if ($success === false) {
return false;
}
return compact('path', 'visibility');
}
/**
* @inheritdoc
*/
public function createDir($dirname, Config $config)
{
$location = $this->applyPathPrefix($dirname);
$umask = umask(0);
$visibility = $config->get('visibility', 'public');
$return = ['path' => $dirname, 'type' => 'dir'];
if ( ! is_dir($location)) {
if (false === @mkdir($location, $this->permissionMap['dir'][$visibility], true)
|| false === is_dir($location)) {
$return = false;
}
}
umask($umask);
return $return;
}
/**
* @inheritdoc
*/
public function deleteDir($dirname)
{
$location = $this->applyPathPrefix($dirname);
if ( ! is_dir($location)) {
return false;
}
$contents = $this->getRecursiveDirectoryIterator($location, RecursiveIteratorIterator::CHILD_FIRST);
/** @var SplFileInfo $file */
foreach ($contents as $file) {
$this->guardAgainstUnreadableFileInfo($file);
$this->deleteFileInfoObject($file);
}
unset($contents);
return rmdir($location);
}
/**
* @param SplFileInfo $file
*/
protected function deleteFileInfoObject(SplFileInfo $file)
{
switch ($file->getType()) {
case 'dir':
rmdir($file->getRealPath());
break;
case 'link':
unlink($file->getPathname());
break;
default:
unlink($file->getRealPath());
}
}
/**
* Normalize the file info.
*
* @param SplFileInfo $file
*
* @return array|void
*
* @throws NotSupportedException
*/
protected function normalizeFileInfo(SplFileInfo $file)
{
if ( ! $file->isLink()) {
return $this->mapFileInfo($file);
}
if ($this->linkHandling & self::DISALLOW_LINKS) {
throw NotSupportedException::forLink($file);
}
}
/**
* Get the normalized path from a SplFileInfo object.
*
* @param SplFileInfo $file
*
* @return string
*/
protected function getFilePath(SplFileInfo $file)
{
$location = $file->getPathname();
$path = $this->removePathPrefix($location);
return trim(str_replace('\\', '/', $path), '/');
}
/**
* @param string $path
* @param int $mode
*
* @return RecursiveIteratorIterator
*/
protected function getRecursiveDirectoryIterator($path, $mode = RecursiveIteratorIterator::SELF_FIRST)
{
return new RecursiveIteratorIterator(
new RecursiveDirectoryIterator($path, FilesystemIterator::SKIP_DOTS),
$mode
);
}
/**
* @param string $path
*
* @return DirectoryIterator
*/
protected function getDirectoryIterator($path)
{
$iterator = new DirectoryIterator($path);
return $iterator;
}
/**
* @param SplFileInfo $file
*
* @return array
*/
protected function mapFileInfo(SplFileInfo $file)
{
$normalized = [
'type' => $file->getType(),
'path' => $this->getFilePath($file),
];
$normalized['timestamp'] = $file->getMTime();
if ($normalized['type'] === 'file') {
$normalized['size'] = $file->getSize();
}
return $normalized;
}
/**
* @param SplFileInfo $file
*
* @throws UnreadableFileException
*/
protected function guardAgainstUnreadableFileInfo(SplFileInfo $file)
{
if ( ! $file->isReadable()) {
throw UnreadableFileException::forFileInfo($file);
}
}
}