Show success message of upload action HTML, NodeJS - html

Question

I upload a file in HTML with nodejs module MULTER:
<form enctype = "multipart/form-data"
action = "/upload"
method = "POST">
<input type="file" name="file" >
<p></p>
<input type="submit" value="Upload File" name="submit" class="btn btn-primary">
</form>
<span>{{submit.message}}</span>
I want to show the response message not in on a new page which is now, I want to show it in the message span.
var upload = multer({ storage : storage}).single('file');
router.post('/upload', function(req, res){
upload(req, res, function(err) {
if(err){
return res.status(400).send({
message: 'wrong'
});
console.log("Error: '" + err + "'");
}else{
return res.status(200).send({
message: 'fine'
});
console.log('Uploaded file: ' + req.file.filename);
}
});
});
angularjs:
this.submit = function() {
$http.post("/upload", data)
.then(
function(res) {
console.log("posted successfully");
this.message = "succesful";
},
function(res) {
console.log(res.data.message);
this.message = res.data.message
}
);
}
How can I parse the response message to the html file without opening a new page. I want to show the response message in the html span response.
Does anyone know how to do this?