您好，我正在处理这个简单的表单，尝试使用以下命令将文件发送到我的 Nodejs 服务器FormData，但由于某种原因，节点从未收到它。另外，我怎样才能让节点在页面上发回一条确认消息，说明已收到文件。我做错了什么或错过了什么？请帮忙。先感谢您。这是我的代码。
HTML
<!DOCTYPE html>
<html>
<head>
<title></title>
<script type="text/javascript">
var fd = new FormData();
fd.append( 'file', input.files[0] );
$.ajax({
url: '/uploadfile',
data: fd,
processData: false,
contentType: false,
type: 'POST',
success: function(data){
alert(data);
}
});
</script>
</head>
<body>
<form enctype='multipart/form-data'>
<input type= "text" name = "theName"/>
<input type="file" id="file" name="file">
<input type="submit">
</form>
</body>
</html>
服务器（Node.js）
var express = require('express');
var router = express.Router();
/* GET users listing. */
router.get('/', function(req, res){
res.sendfile('./public/html/form-file.html');
});
/* POST file */
router.post('/', function(req , res){
console.log('Request received: ');
console.log(req.body) // this line helps inspect the request so you can see whether the data is in the url (GET) or the req body (POST)
console.log('\nRequest recieved: \nmethod: ' + req.method + '\nurl: ' + req.url) // this line logs just the method and url
res.end('callback(\'{\"msg\": \"OK\"}\')');
});
module.exports = router;
这是这个问题的最佳解决方案-> 归功于：https://codeforgeek.com/2014/11/ajax-file-upload-node-js/ https://codeforgeek.com/2014/11/ajax-file-upload-node-js/
HTML
<html>
<head>
<title>File upload Node.</title>
</head>
<body>
<form id="uploadForm"
enctype="multipart/form-data"
action="/api/photo"
method="post">
<input type="file" name="userPhoto" />
<input type="submit" value="Upload Image" name="submit">
<span id = "status"></span>
</form>
</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>
$(document).ready(function() {
$('#uploadForm').submit(function() {
$("#status").empty().text("File is uploading...");
$(this).ajaxSubmit({
error: function(xhr) {
status('Error: ' + xhr.status);
},
success: function(response) {
console.log(response)
$("#status").empty().text(response);
}
});
return false;
});
});
</script>
</html>
SERVER
var express = require("express");
var multer = require('multer');
var app = express();
var upload = multer({ dest: './uploads/'});
app.use(multer({ dest: './uploads/',
rename: function (fieldname, filename) {
return filename+Date.now();
},
onFileUploadStart: function (file) {
console.log(file.originalname + ' is starting ...');
},
onFileUploadComplete: function (file) {
console.log(file.fieldname + ' uploaded to ' + file.path)
}
}));
app.get('/',function(req,res){
res.sendFile(__dirname + "/index.html");
});
app.post('/api/photo',function(req,res){
upload(req,res,function(err) {
if(err) {
return res.end("Error uploading file.");
}
res.end("File is uploaded");
});
});
app.listen(3000,function(){
console.log("Working on port 3000");
});
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