在 expressjs 应用程序中，如何在 API 端点中处理带有 POST 请求的数组？

Question

I'm trying to build expressjs API endpoint. For my application purpose object will come to another server and it's multiple object. I need to convert it an array and after that I need to push it to my database or others.

Also I'm using express 4+ so that's why I didn't use body-parser because it's included with express.

###Note: Data comes from another server and it's "application/x-www-form-urlencoded" format.

I expect data will be like this static data:

    [
        {
            "name": "As Md Habibullah",
            "phone": "+457578424",
            "email": "fhhgssa@yahoo.com",
            "car_brand": "Mercedes-Benz",
            "car_number": "256858"
        },
        {
            "name": "Filippo Masiero",
            "phone": "+hgfhfhfg",
            "email": "ghjhghjhg@yahoo.com",
            "car_brand": "Mercedes-Benz",
            "car_number": "25586458"
        },
        {
            "name": "Azad Ahmed",
            "phone": "+ghjggffg",
            "email": "jghjh@yahoo.com",
            "car_brand": "Mercedes-Benz",
            "car_number": "2566868"
        },
        {
            "name": "Md Musa",
            "phone": "+fgjhfgjfh",
            "email": "dfgyfyhfggh@yahoo.com",
            "car_brand": "Mercedes-Benz",
            "car_number": "256858"
        }
    ]

I assume data will comes to my endpoint, it's multiple object and I need to do an array like multiple object: {}, {}, {}

I want to do an array like: [{}, {}, {}, {}]

Is it possible?

Answer 1

If the data comes as JSON, but clothed in the application/x-www-form-urlencoded , content-type, then you will have to use the express middleware for that content-type. That will give you decoded JSON as plain text which you will then have to manually parse into a Javascript object like this:

// middleware for parsing application/x-www-form-urlencoded content-type 
app.use(express.urlencoded({extended: true}));

app.post("/somerouter", (res, res) => {
    try {
        // parse decoded body text from JSON into Javascript object
        let obj = JSON.parse(req.body);
        console.log(obj);
        // process obj here
        res.send("ok");
    } catch(e) {
       console.log("bad JSON", e);
       res.sendStatus(400);
    }
});

Ideally, the request would be sent as application/json and then you can use the express.json() middleware and the JSON will automatically be parsed into your object.

---

But, if your application/x-www-form-urlencoded data is just form data, then it is already parsed for you and is already in req.body as properties on that object. You just access it directly in req.body :

// middleware for parsing application/x-www-form-urlencoded content-type 
app.use(express.urlencoded({extended: true}));

app.post("/somerouter", (res, res) => {
    console.log(req.body);
    // process data in req.body and then send some response
    res.send("ok");
});