request body of POST to express

Question

I'm new to nodejs, and express, and While combing through some code I came across this, What exactly does it mean? and How do I send a POST request to this (using cURL)?? There are no data-fields specified.

app.post('/', limiter, (req, res, next) => {
let {
    token
} = req.body;
if (token) {
    return res.send('congrats this is your first post request')
}
res.send('not good');
});

Having used flask I have a general idea about what's going on... But I don't understand this part

let {
    token
} = req.body;

Can someone please explain what is going on here? Whatever I try, It isn't accepting any POST request. and isn't returning what I want it to. Please excuse me if this doubt seems too trivial, But I haven't seen this anywhere on the internet.

Answer 1

That is assigning the value of req.body.token to a variable named token. The same as doing this:

let token = req.body.token;

If you want to curl this endpoint your data should be JSON something like this:

curl -H "Content-Type: application/json" \
    -X POST \
    -d '{"token":"<your token here>"}' \
    <your url>

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