@RequestMapping(value = "/downloadSvt")
public ResponseEntity<FileSystemResource> export() {
HttpHeaders headers = new HttpHeaders();
headers.add("Cache-Control", "no-cache, no-store, must-revalidate");
headers.add("Content-Disposition", "attachment; filename=client.js");
headers.add("Pragma", "no-cache");
headers.add("Expires", "0");
File file = new File("./client.js");
return ResponseEntity.ok().headers(headers).contentLength(file.length())
.contentType(MediaType.parseMediaType("application/octet-stream")).body(new FileSystemResource(file));
}