带token的文件下载

 var xhr = new XMLHttpRequest();
    xhr.open('GET', url, true);
    xhr.responseType = "blob";
    xhr.setRequestHeader('Authorization', 'Bearer ' + user_info.access_token)
    xhr.onload = function () {
      if (this.status === 200) {
        var blob = this.response;
        var reader = new FileReader();
        reader.readAsDataURL(blob);
        reader.onload = function (e) {
          var a = document.createElement('a');
          a.download = `filenname.xlsx`;
          a.href = e.target.result;
          a.click();
        }
      }
    };
    xhr.send()

export_applicants(params,{responseType: 'blob'}).then(res => {
      const blob = new Blob([res.data], {
        type: 'application/vnd.ms-excel;charset=utf-8'
      }) 
      const objectUrl = URL.createObjectURL(blob)
      const a = document.createElement('a')
      a.download = `filename.xlsx`
      a.style.display = 'none'
      a.href = objectUrl
      document.body.appendChild(a)
      a.click()
      URL.revokeObjectURL(a.href) 
      document.body.removeChild(a)
    })