后台express需要connect-multiparty模块接收formData的数据类型
???const random = (a, b) => Math.floor(Math.random() * (b - a + 1) + a); ???function randomString32(len) { ?????// 默认返回32位随机字符串 ?????const loopn = len || 32; ?????const c = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'; ?????const c_len = c.length; ?????let res = ''; ?????for (let i = 0; i < loopn; i++) { ???????res += c.charAt(random(0, c_len - 1)); ?????} ?????return res; ???} ???let xhr = new XMLHttpRequest; ???xhr.open('post', 'http://localhost:3000/'); ???// let data = new FormData(); ???// data.append('name', 'ajanuw') ???// data.append('age', '14') ???// xhr.send(data); ???let rs = randomString32(16); ???let data_string = '\r\n' ???data_string += ?????`------WebKitFormBoundary${rs}\r\nContent-Disposition: form-data; name="name"\r\n\r\nalone\r\n`; ???data_string += ?????`------WebKitFormBoundary${rs}\r\nContent-Disposition: form-data; name="age"\r\n\r\n12\r\n`; ???data_string += `------WebKitFormBoundary${rs}--` ???xhr.setRequestHeader('Content-Type', `multipart/form-data; boundary=----WebKitFormBoundary${rs}`); ???xhr.send(data_string); ???xhr.onload = e => { ?????console.log(xhr.response); ???}router.post('/', function (req, res, next) { ?l(req.body) ?res ????.set({ ??????'access-control-allow-origin': '*' ????}) ????.send('hello');});js模拟发送 FormData数据
原文地址：https://www.cnblogs.com/ajanuw/p/9371288.html