Javascript Can';t将blob上载到节点js后端
从计算机的麦克风动态创建水滴。创建的blob没有问题。我曾尝试将其上载到后端,但files对象始终为空 我尝试过各种形式的jQueryAjax、香草javascript和fetch。在后端,我尝试与express fileupload、multer和busboy合作Javascript Can';t将blob上载到节点js后端,javascript,jquery,html,node.js,Javascript,Jquery,Html,Node.js,从计算机的麦克风动态创建水滴。创建的blob没有问题。我曾尝试将其上载到后端,但files对象始终为空 我尝试过各种形式的jQueryAjax、香草javascript和fetch。在后端,我尝试与express fileupload、multer和busboy合作 //frontend function that creates the upload upload.addEventListener("click", function(event){
//frontend function that creates the upload
upload.addEventListener("click", function(event){
var xhr = new XMLHttpRequest();
xhr.onload = function(e) {
if (this.readyState === 4) {
console.log("Server returned: ", e.target.responseText);
}
};
console.log('blob is:',blob,' filename is:', filename);
let form = new FormData();
form.append('file-1', blob);
jQuery.ajax({
url: '/api/askjnj',
data: form,
cache: false,
contentType: false,
processData: false,
method: 'POST',
type: 'POST', // For jQuery < 1.9
success: function(data){
alert(data);
}
});
})
//backend route code
const express = require('express')
const router = express.Router()
const db = require('../database/publicdata')
const bodyParser = require('body-parser')
const fileUpload = require('express-fileupload')
router.use(bodyParser.json())
router.use(
bodyParser.urlencoded({
extended: false,
})
)
router.use(fileUpload);
router.post('/askjnj',async(req,res)=>{
console.log('request files:',req.files);
console.log('req.body:', req.body);
res.send("ok");
})
module.exports = router
我正在req.body中获取测试密钥,但req.files仍然为空。检查此项:。
看起来他们正试图做和你一样的事情
tl;dr使用
FormatData()
将blob打包为正确的数据类型。我能够编写一个可行的代码。希望它对你也有用
HTML(EJS):
myview.ejs
<html>
<head>
<title>File upload Node.</title>
</head>
<body>
<button id='new-item'>BUTTON</button>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery.form/3.51/jquery.form.min.js"></script>
<script>
function postItem() {
let obj =
'o' +
'\nv -0.500000 -0.500000 0.500000' +
'\nv 0.500000 -0.500000 0.500000' +
'\nv -0.500000 0.500000 0.500000' +
'\nvt 0.000000 0.000000' +
'\nvt 1.000000 0.000000' +
'\nvt 0.000000 1.000000' +
'\nvn 0.000000 0.000000 1.000000' +
'\nf 1/1/1 2/2/1 3/3/1';
blob = new Blob([obj]);
console.log(blob);
let formData = new FormData();
formData.append("files[]", blob, "test.wav");
formData.append("test", "test");
$.ajax({
url: '/api/askjnj',
type: 'POST',
data: formData,
success: function(data) {
console.log(data);
},
error: function(err) {
console.log(err);
},
cache: false,
contentType: false,
processData: false
});
} //postItem()
$('#new-item').on('click', function() {
postItem();
});
</script>
</html>
命令:
node myview.js
谢谢。我还有几件事要尝试。我在找的时候没抓到那个。我一开始工作就给你投票。现在就试试这个。谢谢你的洞察力
<html>
<head>
<title>File upload Node.</title>
</head>
<body>
<button id='new-item'>BUTTON</button>
</body>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery.form/3.51/jquery.form.min.js"></script>
<script>
function postItem() {
let obj =
'o' +
'\nv -0.500000 -0.500000 0.500000' +
'\nv 0.500000 -0.500000 0.500000' +
'\nv -0.500000 0.500000 0.500000' +
'\nvt 0.000000 0.000000' +
'\nvt 1.000000 0.000000' +
'\nvt 0.000000 1.000000' +
'\nvn 0.000000 0.000000 1.000000' +
'\nf 1/1/1 2/2/1 3/3/1';
blob = new Blob([obj]);
console.log(blob);
let formData = new FormData();
formData.append("files[]", blob, "test.wav");
formData.append("test", "test");
$.ajax({
url: '/api/askjnj',
type: 'POST',
data: formData,
success: function(data) {
console.log(data);
},
error: function(err) {
console.log(err);
},
cache: false,
contentType: false,
processData: false
});
} //postItem()
$('#new-item').on('click', function() {
postItem();
});
</script>
</html>
var express = require('express');
var app=express();
//var router = express.Router();
const multer = require('multer');
const upload = multer();
app.set('view engine', 'ejs');
app.get('/', function (req, res) {
console.log('marhaba');
res.render('myview', {});
});
app.post('/api/askjnj', upload.any(), (req, res) => {
console.log('Here');
console.log('Files: ', req.files);
res.send('ok');
});
app.listen(3000, function () {
console.log("Working on port 3000");
});