Файл Excel поврежден в Angular 7

Question

при загрузке файла Excel в Angular файл поврежден. Мы получаем ответ от WEB API в Java. Ниже приведен код.

Любая помощь полезна. Ниже приведен код Java: здесь служба возвращает файл.

public ResponseEntity retrieveByReportType(
                                    @RequestParam("date_from") Date fromDate,
                                    @RequestParam("date_to") Date toDate,
                                    @RequestParam("report_type") ReportType reportType) {
        LOG.info("Retrieving payments for reportType : " + reportType);
        try {
            List<ReportData> reportDataList = serice.retrieveByReportType(fromDate, toDate, reportType);
            if (Optional.ofNullable(reportDataList).isPresent()) {
                LOG.info("No of Records exists : " + reportDataList.size());
                ByteArrayInputStream in = ExcelGeneratorUtil.exportToExcel(reportType, reportDataList);
                // return IOUtils.toByteArray(in);

                HttpHeaders headers = new HttpHeaders();
                String headerValue = "attachment; filename=" + reportType.toString() + ".xls";
                headers.add("Content-Disposition", headerValue);


                return ResponseEntity
                    .ok()
                    .headers(headers)
                    .contentType(MediaType.parseMediaType("application/vnd.ms-excel"))
                    .body(new InputStreamResource(in));
            } else {
                LOG.info("Payment Records not found for Report-Type : " + reportType);
                return new ResponseEntity(HttpStatus.NOT_FOUND);
            }
        } catch (Exception ex) {
            throw new PaymentException(ex);
        }
    }

Служба My Node Js: это место, где явызов WEB API. Здесь я также устанавливаю тип содержимого и тип ответа.

 getSelectedReport(req) {
      return this.createAuthToken().then(token => request.get({
      uri: `${bulkScanUrl}/report/download?date_from=${req.query.date_from}&date_to=${req.query.date_to}&report_type=${req.query.report_type}`,
      headers: {
        Authorization: `Bearer ${req.authToken}`,
        ServiceAuthorization: `Bearer ${token}`,
       'Content-type': 'application/json;charset=UTF-8',
       'Accept': 'application/vnd.ms-excel'
      },
      json: true,
      responseType: 'arraybuffer'
    }));
  }

Node Js Controller: This is my Controller where am calling the service controller with the request .

 getSelectedReport(req, res) {
    return this.bulkScanService.getSelectedReport(req)
      .then(result => {
        res.status(200).json({ data: result, success: true });
      })
      .catch(error => {
        res.status(500).json({ err: error, success: false });
      });
  }

Component.ts: This is my component file where am using my blob object to download the excel file. Here am able to download the excel, but the data is corrupt.
   this.service.downloadSelectedReport(selectedReportName,selectedStartDate,selectedEndDate).subscribe((response) => {
      let myBlob = new Blob([response.data], {type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'});
      let downloadUrl = URL.createObjectURL(myBlob);
      let a = document.createElement('a');
      a.href = downloadUrl;
      a.download = this.reportsForm.get('selectedreport').value+'.xls';
      a.click();
      setTimeout( ()=> {
            URL.revokeObjectURL(downloadUrl);enter code here
        }, 100);`enter code here`
    }); 
  }