^^&&^^

Edit File: FileChunkStream.inc

<?php
/**
 * Author:		Shlomi
 * Date:		Jun 11, 2019 2:09:18 PM
 * Founder:		Shlomi Bazak (SBZsoft) (c)
 * File: 		FileChunkStream.inc
 *  
 * Description:
 *		
 */
namespace B2\FS;
use B2\Exceptions\FileException;

// No direct access.
defined("__NSS__") or die("Restrected Access.");

class FileChunkStream {
	
	const BB_CHUNK_FILE_PREFIX = "bb_chunk_";
	
	private $_stream;
	private $_fileReader;
	private $_chunkSize;
	private $_size;
	private $_sha1;
	private $_tmpFileName;
	
	
	public function __construct(FileReader $reader){
		$this->_fileReader = $reader;
		$this->_stream = @fopen($this->_tmpFileName=tempnam(sys_get_temp_dir(), self::BB_CHUNK_FILE_PREFIX), 'r+');
		if(false === $this->_stream) throw new FileException("Unable to create temp chunk file.");
		$this->_chunkSize = $reader->getChunkSize();
		$this->_size = 0;
		$this->_sha1 = "";
		$this->_prepare();
	}
	
	private function _prepare(){
		$len = 1000000; // local copy 
		while($this->_chunkSize > 0 && !$this->_fileReader->eof()) {
			if($this->_chunkSize <= $len){
				$len = $this->_chunkSize;
			}
			$this->_chunkSize -= $len;
			if(false === fwrite($this->_stream, $this->_fileReader->read($len)))
				throw new FileException("Can't write to temp chunk file.");
		}
		fflush($this->_stream);
		$this->_size = filesize($this->_tmpFileName);
		$this->_sha1 = sha1_file($this->_tmpFileName);
	}
	
	public function getData(){
		if($this->_stream && is_resource($this->_stream)) fclose($this->_stream);
		return $this->_stream = fopen($this->_tmpFileName, "r");
	}
	
	public function getSize(){
		return $this->_size;
	}
	
	public function getHash(){
		return $this->_sha1;
	}
	
	public function __destruct(){ 
		if($this->_stream && is_resource($this->_stream)) fclose($this->_stream);
		if(file_exists($this->_tmpFileName)) @unlink($this->_tmpFileName);
	}
	
}