javascript - Nodejs 从请求中获取 [object Object]

Question

我正在将变量从 AJAX 传递到 Node JS 服务器，但是在尝试从请求中提取数据时，我一直收到 [Object Object]。我如何获取从 AJAX 传递到 Node 的数据？

Ajax :

$.ajax({
            type: "POST", 
            url: "/Watch", 
            data: {"name" : stockName},
            contentType: "json", 
            success: function(d) {
                //Stuff happening
            }, 
            error: function(d) {
                console.log("Error");
            }
        });

Node JS 服务器:

app.post('/Watch', function(req, res) {     

console.log("DATA from AJAX = " + req.body);//Returns [Object Object]
console.log("DATA from AJAX = " + req.body.data);//Returns 'undefined'
console.log("DATA from AJAX = " + req.data);//Returns 'undefined'
console.log("DATA from AJAX = " + req.name);//Returns 'undefined'
console.log("DATA from AJAX = " + req.body.data);//Returns 'undefined'  

res.send("");
});

在 Node JS 中，console.log 显示了我尝试从请求中获取数据的一些不同内容。

Answer 1

在@mscdex 的帮助下，解决方案是

Ajax :

alert(JSON.stringify({"name" : stockName}));
        $.ajax({
            type: "POST", 
            url: "/Watch", 
            data: JSON.stringify({"name" : stockName}), 
            contentType: "application/json", 
            success: function(d) {
                //Stuff                 
            }, 
            error: function(d) {
                console.log("Error");
            }
        }); 

Node JS:

var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var port = process.env.PORT || 5000;

app.use(bodyParser.json());   

app.post('/Watch', function(req, res) {
    console.log("In Watchlist POST");

    console.log("DATA from AJAX = " + req.body.name);//This was the solution    

    res.send("Finished Watchlist post");
});

app.use(express.static('public'));

app.listen(port, function () {
    console.log('App listening on port ' + port);
});