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<?php
/**
* BackWPup_Destination_Ftp_Downloader
*
* @since 3.5.0
* @package Inpsyde\BackWPup
*/
/**
* Class BackWPup_Destination_Ftp_Downloader
*
* @since 3.5.0
* @package Inpsyde\BackWPup
*/
final class BackWPup_Destination_Ftp_Downloader implements BackWPup_Destination_Downloader_Interface {
/**
* @var \BackWpUp_Destination_Downloader_Data
*/
private $data;
/**
* @var resource
*/
private $source_file_handler;
/**
* @var resource
*/
private $local_file_handler;
/**
* @var BackWPup_Destination_Ftp_Connect
*/
private $ftp_resource;
/**
* BackWPup_Destination_Ftp_Downloader constructor
*/
public function __construct( BackWpUp_Destination_Downloader_Data $data ) {
$this->data = $data;
$this->ftp_resource();
}
/**
* Clean up things
*/
public function __destruct() {
fclose( $this->source_file_handler );
fclose( $this->local_file_handler );
}
/**
* @inheritdoc
*/
public function download_chunk( $start_byte, $end_byte ) {
$this->source_file_handler( $start_byte );
$this->local_file_handler( $start_byte );
$bytes = (int) stream_copy_to_stream(
$this->source_file_handler,
$this->local_file_handler,
$end_byte - $start_byte + 1,
0
);
if ( $bytes === 0 ) {
throw new \RuntimeException( __( 'Could not write data to file.', 'backwpup' ) );
}
}
/**
* @inheritdoc
*/
public function calculate_size() {
$resource = $this->ftp_resource
->connect()
->resource();
$size = ftp_size( $resource, $this->data->source_file_path() );
ftp_close( $resource );
return $size;
}
/**
* Set the source file handler
*
* @param int $start_byte
*/
private function source_file_handler( $start_byte ) {
if ( is_resource( $this->source_file_handler ) ) {
return;
}
$ctx = stream_context_create( array( 'ftp' => array( 'resume_pos' => $start_byte ) ) );
$url = $this->ftp_resource->getURL( $this->data->source_file_path(), false, $ctx );
$this->source_file_handler = fopen( $url, 'r' );
if ( ! is_resource( $this->source_file_handler ) ) {
throw new \RuntimeException( __( 'Cannot open FTP file for download.', 'backwpup' ) );
}
}
/**
* Set the local file handler
*
* @param int $start_byte
*/
private function local_file_handler( $start_byte ) {
if ( is_resource( $this->local_file_handler ) ) {
return;
}
$this->local_file_handler = fopen( $this->data->local_file_path(), $start_byte === 0 ? 'wb' : 'ab' );
if ( ! is_resource( $this->local_file_handler ) ) {
throw new \RuntimeException( __( 'File could not be opened for writing.', 'backwpup' ) );
}
}
/**
* Set the Ftp resource
*
* @return void
*/
private function ftp_resource() {
$opts = (object) BackWPup_Option::get_job( $this->data->job_id() );
$this->ftp_resource = new BackWPup_Destination_Ftp_Connect(
$opts->ftphost,
$opts->ftpuser,
BackWPup_Encryption::decrypt( $opts->ftppass ),
$opts->ftphostport,
$opts->ftptimeout,
$opts->ftpssl,
$opts->ftppasv
);
}
}