下载文件时如何避免或添加身份验证令牌？

Question

在我将jwt身份验证添加到我的项目之前，文件下载工作正常。我单击下载按钮时遇到此问题：UnauthorizedError：未找到授权令牌。 请采取任何解决方案来避免此问题？

downloadcsv.component.ts：

import { Component, OnInit, Input } from '@angular/core';
import { AdminService } from '../../_services/admin.service';
import {Csv} from '../../_models';
import { Client } from '../../_models';

import {MessageService} from 'primeng/api';
@Component({
  selector: 'app-download-csv',
  templateUrl: './download-csv.component.html',
  styleUrls: ['./download-csv.component.css']
})
export class DownloadCsvComponent implements OnInit {

 csvs: Csv[];
  ncsv = true;
 c: Client[];
csv: Csv;
 cl: Client;

  constructor(private s: AdminService,private messageService: MessageService) { }


  ngOnInit() {


    this.s.getAll().subscribe(
      data => {this.c = data; });
  }


 download(fname): string
  {
return 'http://localhost:3000/csv/download/' + fname;

  }
}

downloadcsv.component.html：

 <div class="p-grid p-justify-center"  *ngIf="csvs" >
    <p-card [style]="{width: '300px'}">
   <div *ngFor="let c of csvs" >
      {{ c.nomdoc }}
      <a  href="{{download(c.filename)}}">
          <i class="material-icons" style="font-size: 20px;">
            get_app
            </i></a>

  </div>
  </p-card>
  </div>

csvController.js：

router.get("/download/:filename", function(req, res) {
  var file = "./csvuploads/" + req.params.filename;
  res.download(file); // Set disposition and send it.
});

router.get("/toto", (req, res) => {
  CSV.find((err, docs) => {
    if (!err) {
      res.send(docs);
    } else {
      console.log(
        "Error in Retriving csvfiles :" + JSON.stringify(err, undefined, 2)
      );
    }
  });
});