Node.js with express.js returns 500 to ajax call

Question

I have a cordova project where I do the following request.

$("#asd").on("click",function(){
    var data = {};
    data.title = "title";
    data.message = "message";

    $.ajax('127.0.0.1:3000/register', 
    {
        type: 'POST',
        data: JSON.stringify(data),
        contentType: 'application/json',
        success: function() { console.log('success');},
        error  : function() { console.log('error');}
    });
});

Server side code:

var express = require('express');
var app = express();

app.use(express.bodyParser());


app.post('/register', function(req, res){
    var obj = {};
    console.log('body: ' + JSON.stringify(req.body));
    res.send(req.body);
});


app.listen(3000);

But I get Internal Server Error 500 when I send the request. If I make a request simply by an html form or curl it just works fine.

What might be the cause of this?

Answer 1

If it's related to the CORS, then you need to allow CORS on the server wich serves static via adding the following HTTP header:

Access-Control-Allow-Origin: http://127.0.0.1:3000

Here is the example for Express (they put a wildcard * instead of http://127.0.0.1:3000 ).

Answer 2

$.ajax({
        url:'/register',   //or 'localhost:3000/register'
        type: 'POST',
        data: JSON.stringify(data),
        contentType: 'application/json',
        success: function() { console.log('success');},
        error  : function() { console.log('error');}
    });

Also you are required to use cors()

var cors = require('cors')

var app = express();
app.use(cors());

Also: https://enable-cors.org/server_expressjs.html

Answer 3

尝试JSON.stringify（）作为响应

res.send(JSON.stringify(req.body));