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<?php
namespace OldSabre\DAV\PartialUpdate;
use OldSabre\DAV;
/**
* This interface provides a way to modify only part of a target resource
* It may be used to update a file chunk, upload big a file into smaller
* chunks or resume an upload
*
* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
* @author Jean-Tiare LE BIGOT (http://www.jtlebi.fr/)
* @license http://sabre.io/license/ Modified BSD License
*/
interface IPatchSupport extends DAV\IFile {
/**
* Updates the file based on a range specification.
*
* The first argument is the data, which is either a readable stream
* resource or a string.
*
* The second argument is the type of update we're doing.
* This is either:
* * 1. append
* * 2. update based on a start byte
* * 3. update based on an end byte
*;
* The third argument is the start or end byte.
*
* 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.
*
* @param resource|string $data
* @param int $rangeType
* @param int $offset
* @return string|null
*/
function patch($data, $rangeType, $offset = null);
}
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