Js 下载文件 - Githubissues


fetch('https://jsonplaceholder.typicode.com/todos/1')
  .then(resp => resp.blob())
  .then(blob => {
    const url = window.URL.createObjectURL(blob);
    const a = document.createElement('a');
    a.style.display = 'none';
    a.href = url;
    // the filename you want
    a.download = 'todo-1.json';
    document.body.appendChild(a);
    a.click();
    window.URL.revokeObjectURL(url);
    alert('your file has downloaded!'); // or you know, something with better UX...
  })
  .catch(() => alert('oh no!'));


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <script src="https://unpkg.com/axios/dist/axios.min.js"></script>
</head>
<body>
     <button onclick="GetFile()">下载</button>
     <script>
         // 会先下载流，完成后才弹出选择目录，所以最好加上进度条
         function GetFile(){
             axios({
                 url: `http://image.wangrui8.top/dms-2019-07-22-00-00~1.mp4`,
                 method: 'get',
                 responseType: 'blob',
                 onDownloadProgress (progress){
                     // 这里是下载的进度
                    console.log(Math.round(progress.loaded / progress.total * 100) + '%');
                 },
             })
                 .then(res=>{
                    let blobUrl = window.URL.createObjectURL(res.data);
                    let link = document.createElement('a');
                    document.body.appendChild(link);
                    link.href = blobUrl;
                    link.download = '下载文件.mp4';
                    link.click();
                    window.URL.revokeObjectURL(blobUrl);
                 })
         }
     </script>
</body>
</html>

参考： https://stackoverflow.com/questions/3749231/download-file-using-javascript-jquery https://my.oschina.net/u/4342183/blog/3419827

wzhanjun / blog

Js 下载文件 #41