注意：YourUrl，就是获取 pre-signed URLs的地址
<input type="file" id="selector" multiple><button onclick="upload()">Upload</button><div id="status">No uploads</div><script src="https://cdn.bootcss.com/jquery/2.2.4/jquery.min.js"></script><script type="text/javascript"> function upload() { ??[$(‘#selector‘)[0].files].forEach(fileObj => { ????var file = fileObj[0] ????// 从服务器获取一个URL ????retrieveNewURL(file, url => { ??????// 上传文件到服务器 ??????uploadFile(file, url) ????}) ??}) } // 发请求到Node.js server获取上传URL。 function retrieveNewURL(file, cb) { ??$.get(`YourUrl?name=${file.name}`, (url) => { ????cb(url) ??}) } // 使用XMLHttpRequest来上传文件到S3。 function uploadFile(file, url) { ????var xhr = new XMLHttpRequest () ????// 加载进度条 ????xhr.upload.onprogress = function (e) { ????????// For uploads ????????if (e.lengthComputable) { ????????????console.log(e.loaded / e.total); ????????????$(‘#status‘).text(‘上传进度：‘ + ((e.loaded / e.total)*100).toFixed(2) + ‘%‘); ????????} ????}; ????xhr.open(‘PUT‘, url, true) ????xhr.send(file) ????xhr.onload = () => { ??????if (xhr.status == 200) { ????????$(‘#status‘).text(`${file.name} 上传成功。`) ??????} ????} }</script>Aws pre-signed URLs 上传文件，带进度显示
原文地址：https://www.cnblogs.com/codeaaa/p/10594233.html