angularjs – NodeJS / Express4端点生成损坏的xlsx文件

要创建xlsx文件,我使用的是node-xlsx库.

var xlsx = require('node-xlsx');
var buffer = xlsx.build([{
  name: pasta,data: data
}]);
res.setHeader('Content-Type','application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
res.setHeader("Content-Disposition","attachment; filename=" + pasta + ".xlsx");
res.write(buffer,'binary');
return res.end();

我试图通过Angular应用程序下载此文件.

$http.post('https://endpoint/v1/' + folderName + '/reportExcel',{
    responseType: 'arraybuffer'
  })
  .success(function(response) {
      var blob = new Blob([response],{
        type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
      });
      var objectUrl = URL.createObjectURL(blob);
      $window.open(objectUrl);

但是,正在下载的文件已损坏,因此无法打开它.