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<?php
namespace Sabre\DAV;
/**
* This interface represents a file in the directory tree
*
* A file is a bit of a broad definition. In general it implies that on
* this specific node a PUT or GET method may be performed, to either update,
* or retrieve the contents of the file.
*
* @copyright Copyright (C) 2007-2014 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
interface IFile extends INode {
/**
* Updates the data
*
* The data argument is a readable stream resource.
*
* After a succesful 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 resource $data
* @return string|null
*/
function put($data);
/**
* Returns the data
*
* This method may either return a string or a readable stream resource
*
* @return mixed
*/
function get();
/**
* Returns the mime-type for a file
*
* If null is returned, we'll assume application/octet-stream
*
* @return string|null
*/
function getContentType();
/**
* 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.
*
* Return null if the ETag can not effectively be determined
*
* @return void
*/
function getETag();
/**
* Returns the size of the node, in bytes
*
* @return int
*/
function getSize();
}
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