.zip file instant interrupt

[MichalNemec]

Hello,

in custom function i have

DownloadManager.download({
            url: xxx,
            path: DOWNLOAD_DIR
        }, function (error, info) {
            if (error) {
                console.log(error);
                return;
            }

            console.log("DONE: " + info.url);
        });

but for some reason .zip file is instantly interrupted. From chrome i can download it normally.

Start downloading Patch.zip
Patch.zip does not exist, download it now
Error: The download of Patch.zip was interrupted
    at DownloadItem.<anonymous> (D:\app\node_modules\electron-download-manager\index.js:63:46)
    at DownloadItem.emit (events.js:194:13)

on webhost i have this

if (file_exists($file)) {
            header('Content-Description: File Transfer');
            //header('Content-Type: application/octet-stream');
            header("Content-type: application/zip");
            header('Content-Disposition: attachment; filename="' . $file . '"');
            header('Content-Transfer-Encoding: binary');
            header('Connection: Keep-Alive');
            header('Expires: 0');
            header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
            header('Pragma: public');
            header('Content-Length: ' . sprintf("%u", filesize($file)));
            $fh = fopen($file, "rb");
            while (!feof($fh)) {
                echo fgets($fh);
                flush();
            }
            fclose($fh);
            exit;
        } else {
            header("HTTP/1.0 404 Not Found");
            exit('File not found!');
        }