vue如何根据url下载非同源文件

import axiOS from "axios";
// 下载文件（可解决跨域下载问题）
export async function downloadFile(fileUrl, fileName) {
  if (!fileUrl) return;
  let res = await axios({
    method: "get",
    url: fileUrl,
    responseType: "blob"
  });
  let newUrl = window.URL.createObjectURL(res.data);
  let a = document.createElement("a");
  a.href = newUrl;
  a.download = fileName;
  a.click();
  a.remove();
  //在资源下载完成后 可以人工清除createObjectURL 占用的缓存资源
  window.URL.revokeObjectURL(newUrl);
}

<template>
  <div>
      {{file.name}}
      <span
        class="file-download"
        @click="downloadFile(file.url, file.name)"
        >下载</span
      >
  </div>
</template>

<script>
import { downloadFile } from "@/util/index.js";
export default {
  components: {},
  data() {
    return {
      file:{
          url:'https://gimg2.baidu.com/image_search/src=Http%3A%2F%2Fb.zol-img.com.cn%2Fdesk%2Fbizhi%2Fimage%2F6%2F960x600%2F1426818724752.jpg&refer=http%3A%2F%2Fb.zol-img.com.cn&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=jpeg?sec=1627377638&t=662034e86ff9110854ca0316485e294b',
          name:'美景图'
      }
    };
  },
  created() {},
  mounted() {},
  methods: {
    downloadFile
  }
};
</script>

<style lang="sCSS" scoped>

</style>

import downLoad from './downLoad'

const install = function(Vue) {
  Vue.directive('downLoadUrl', downLoad)
}

downLoad.install = install

export default downLoad
down-load-url / downLoad.js文件
export default {
  bind(el, binding) {
    el.addEventListener('click', () => {
      console.log(binding.value) // url
      const a = document.createElement('a')
      //   let url = baseUrl + binding.value // 若是不完整的url则需要拼接baseURL
      const url = binding.value // 完整的url则直接使用
      // 这里是将url转成blob地址，
      fetch(url).then(res => res.blob()).then(blob => { // 将链接地址字符内容转变成blob地址
        a.href = URL.createObjectURL(blob)
        console.log(a.href)
        a.download = '' // 下载文件的名字
        // a.download = url.split('/')[url.split('/').length -1] //  // 下载文件的名字
        document.body.appendChild(a)
        a.click()
      })
    })
  }
}