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<?php
/* Icinga Web 2 | (c) 2017 Icinga Development Team | GPLv2+ */
namespace Icinga\File\Storage;
use ErrorException;
use Icinga\Exception\AlreadyExistsException;
use Icinga\Exception\NotFoundError;
use Icinga\Exception\NotReadableError;
use Icinga\Exception\NotWritableError;
use InvalidArgumentException;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use Traversable;
use UnexpectedValueException;
/**
* Stores files in the local file system
*/
class LocalFileStorage implements StorageInterface
{
/**
* The root directory of this storage
*
* @var string
*/
protected $baseDir;
/**
* Constructor
*
* @param string $baseDir The root directory of this storage
*/
public function __construct($baseDir)
{
$this->baseDir = rtrim($baseDir, DIRECTORY_SEPARATOR);
}
public function getIterator(): Traversable
{
try {
return new RecursiveIteratorIterator(
new RecursiveDirectoryIterator(
$this->baseDir,
RecursiveDirectoryIterator::CURRENT_AS_FILEINFO
| RecursiveDirectoryIterator::KEY_AS_PATHNAME
| RecursiveDirectoryIterator::SKIP_DOTS
)
);
} catch (UnexpectedValueException $e) {
throw new NotReadableError('Couldn\'t read the directory "%s": %s', $this->baseDir, $e);
}
}
public function has($path)
{
return is_file($this->resolvePath($path));
}
public function create($path, $content)
{
$resolvedPath = $this->resolvePath($path);
$this->ensureDir(dirname($resolvedPath));
try {
$stream = fopen($resolvedPath, 'x');
} catch (ErrorException $e) {
throw new AlreadyExistsException('Couldn\'t create the file "%s": %s', $path, $e);
}
try {
fclose($stream);
chmod($resolvedPath, 0664);
file_put_contents($resolvedPath, $content);
} catch (ErrorException $e) {
throw new NotWritableError('Couldn\'t create the file "%s": %s', $path, $e);
}
return $this;
}
public function read($path)
{
$resolvedPath = $this->resolvePath($path, true);
try {
return file_get_contents($resolvedPath);
} catch (ErrorException $e) {
throw new NotReadableError('Couldn\'t read the file "%s": %s', $path, $e);
}
}
public function update($path, $content)
{
$resolvedPath = $this->resolvePath($path, true);
try {
file_put_contents($resolvedPath, $content);
} catch (ErrorException $e) {
throw new NotWritableError('Couldn\'t update the file "%s": %s', $path, $e);
}
return $this;
}
public function delete($path)
{
$resolvedPath = $this->resolvePath($path, true);
try {
unlink($resolvedPath);
} catch (ErrorException $e) {
throw new NotWritableError('Couldn\'t delete the file "%s": %s', $path, $e);
}
return $this;
}
public function resolvePath($path, $assertExistence = false)
{
if ($assertExistence && ! $this->has($path)) {
throw new NotFoundError('No such file: "%s"', $path);
}
$steps = preg_split('~/~', $path, -1, PREG_SPLIT_NO_EMPTY);
for ($i = 0; $i < count($steps);) {
if ($steps[$i] === '.') {
array_splice($steps, $i, 1);
} elseif ($steps[$i] === '..' && $i > 0 && $steps[$i - 1] !== '..') {
array_splice($steps, $i - 1, 2);
--$i;
} else {
++$i;
}
}
if ($steps[0] === '..') {
throw new InvalidArgumentException('Paths above the base directory are not allowed');
}
return $this->baseDir . DIRECTORY_SEPARATOR . implode(DIRECTORY_SEPARATOR, $steps);
}
/**
* Ensure that the given directory exists
*
* @param string $dir
*
* @throws NotWritableError
*/
protected function ensureDir($dir)
{
if (! is_dir($dir)) {
$this->ensureDir(dirname($dir));
try {
mkdir($dir, 02770);
} catch (ErrorException $e) {
throw new NotWritableError('Couldn\'t create the directory "%s": %s', $dir, $e);
}
}
}
}
|
