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<?php
/**
* Copyright (c) 2016 Robin Appelman <icewind@owncloud.com>
* This file is licensed under the Licensed under the MIT license:
* http://opensource.org/licenses/MIT
*/
namespace Icewind\Streams;
/**
* Wrapper that retries reads/writes to remote streams that dont deliver/recieve all requested data at once
*/
class RetryWrapper extends Wrapper {
/**
* Wraps a stream with the provided callbacks
*
* @param resource $source
* @return resource
*/
public static function wrap($source) {
$context = stream_context_create(array(
'retry' => array(
'source' => $source
)
));
return Wrapper::wrapSource($source, $context, 'retry', '\Icewind\Streams\RetryWrapper');
}
protected function open() {
$this->loadContext('retry');
return true;
}
public function dir_opendir($path, $options) {
return false;
}
public function stream_open($path, $mode, $options, &$opened_path) {
return $this->open();
}
public function stream_read($count) {
$result = parent::stream_read($count);
$bytesReceived = strlen($result);
while (strlen($result) > 0 && $bytesReceived < $count && !$this->stream_eof()) {
$result .= parent::stream_read($count - $bytesReceived);
$bytesReceived = strlen($result);
}
return $result;
}
public function stream_write($data) {
$bytesToSend = strlen($data);
$bytesWritten = parent::stream_write($data);
$result = $bytesWritten;
while ($bytesWritten > 0 && $result < $bytesToSend && !$this->stream_eof()) {
$dataLeft = substr($data, $result);
$bytesWritten = parent::stream_write($dataLeft);
$result += $bytesWritten;
}
return $result;
}
}
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