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<?php
declare(strict_types=1);
namespace Sabre\DAV;
/**
* File class.
*
* This is a helper class, that should aid in getting file classes setup.
* Most of its methods are implemented, and throw permission denied exceptions
*
* @copyright Copyright (C) fruux GmbH (https://fruux.com/)
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
abstract class File extends Node implements IFile
{
/**
* Replaces the contents of the file.
*
* The data argument is a readable stream resource.
*
* After a successful put operation, you may choose to return an ETag. The
* etag must always be surrounded by double-quotes. These quotes must
* appear in the actual string you're returning.
*
* Clients may use the ETag from a PUT request to later on make sure that
* when they update the file, the contents haven't changed in the mean
* time.
*
* If you don't plan to store the file byte-by-byte, and you return a
* different object on a subsequent GET you are strongly recommended to not
* return an ETag, and just return null.
*
* @param string|resource $data
*
* @return string|null
*/
public function put($data)
{
throw new Exception\Forbidden('Permission denied to change data');
}
/**
* Returns the data.
*
* This method may either return a string or a readable stream resource
*
* @return mixed
*/
public function get()
{
throw new Exception\Forbidden('Permission denied to read this file');
}
/**
* Returns the size of the file, in bytes.
*
* @return int
*/
public function getSize()
{
return 0;
}
/**
* Returns the ETag for a file.
*
* An ETag is a unique identifier representing the current version of the file. If the file changes, the ETag MUST change.
* The ETag is an arbitrary string, but MUST be surrounded by double-quotes.
*
* Return null if the ETag can not effectively be determined
*
* @return string|null
*/
public function getETag()
{
return null;
}
/**
* Returns the mime-type for a file.
*
* If null is returned, we'll assume application/octet-stream
*
* @return string|null
*/
public function getContentType()
{
return null;
}
}
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