94 lines
2.1 KiB
PHP
94 lines
2.1 KiB
PHP
<?php
|
|
/**
|
|
* Copyright (c) 2014 Robin Appelman <icewind@owncloud.com>
|
|
* This file is licensed under the Licensed under the MIT license:
|
|
* http://opensource.org/licenses/MIT
|
|
*/
|
|
|
|
namespace Icewind\SMB\Native;
|
|
|
|
use Icewind\SMB\StringBuffer;
|
|
|
|
/**
|
|
* Stream optimized for read only usage
|
|
*/
|
|
class NativeReadStream extends NativeStream {
|
|
const CHUNK_SIZE = 1048576; // 1MB chunks
|
|
|
|
/** @var StringBuffer */
|
|
private $readBuffer;
|
|
|
|
public function __construct() {
|
|
$this->readBuffer = new StringBuffer();
|
|
}
|
|
|
|
/** @var int */
|
|
private $pos = 0;
|
|
|
|
public function stream_open($path, $mode, $options, &$opened_path) {
|
|
return parent::stream_open($path, $mode, $options, $opened_path);
|
|
}
|
|
|
|
/**
|
|
* Wrap a stream from libsmbclient-php into a regular php stream
|
|
*
|
|
* @param NativeState $state
|
|
* @param resource $smbStream
|
|
* @param string $mode
|
|
* @param string $url
|
|
* @return resource
|
|
*/
|
|
public static function wrap(NativeState $state, $smbStream, string $mode, string $url) {
|
|
return parent::wrapClass($state, $smbStream, $mode, $url, NativeReadStream::class);
|
|
}
|
|
|
|
public function stream_read($count) {
|
|
// php reads 8192 bytes at once
|
|
// however due to network latency etc, it's faster to read in larger chunks
|
|
// and buffer the result
|
|
if (!parent::stream_eof() && $this->readBuffer->remaining() < $count) {
|
|
$chunk = parent::stream_read(self::CHUNK_SIZE);
|
|
if ($chunk === false) {
|
|
return false;
|
|
}
|
|
$this->readBuffer->push($chunk);
|
|
}
|
|
|
|
$result = $this->readBuffer->read($count);
|
|
|
|
$read = strlen($result);
|
|
$this->pos += $read;
|
|
|
|
return $result;
|
|
}
|
|
|
|
public function stream_seek($offset, $whence = SEEK_SET) {
|
|
$result = parent::stream_seek($offset, $whence);
|
|
if ($result) {
|
|
$this->readBuffer->clear();
|
|
$pos = parent::stream_tell();
|
|
if ($pos === false) {
|
|
return false;
|
|
}
|
|
$this->pos = $pos;
|
|
}
|
|
return $result;
|
|
}
|
|
|
|
public function stream_eof() {
|
|
return $this->readBuffer->remaining() <= 0 && parent::stream_eof();
|
|
}
|
|
|
|
public function stream_tell() {
|
|
return $this->pos;
|
|
}
|
|
|
|
public function stream_write($data) {
|
|
return false;
|
|
}
|
|
|
|
public function stream_truncate($size) {
|
|
return false;
|
|
}
|
|
}
|