What could be causing the Express server to return an error despite everything being in order?

I am new to exploring express.js and attempting to create a basic sign-in example server. I have set up a database object with a users array containing objects, each with email and password properties. Despite using body-parser to convert the body into a javascript object, I keep encountering an error in response. Below is the code snippet:

const app = express();
app.use(bodyParser.json())

const database = {
    users: [
        {
            email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="afc5cecc...">[email protected]</a>',
            password: 'somepw'
        },
        {
            email: '<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="21425250...">[email protected]</a>',
            password: 'dkjfzqsdiof'
        }
    ]
}


app.post('/signin', (req, res) => {
    if (req.body.email === database.users[0].email && req.body.password === database.users[0].password) {
        res.json('success')
    } else {
        res.json('error')
    }
})

app.listen(3000, () => {
    console.log('app is listening')
})

The request sent through postman:

{
    "email": "<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="056f64666...">[email protected]</a>",
    "password": "somepw"
}

Despite the request matching the database data, it still returns an error. Hopefully, the issue has been explained clearly. Thank you.

Answer №1

The crucial element that was absent was a necessary content-type header when sending JSON data through a POST request (source). Enabling this in Postman is a simple process:

https://i.sstatic.net/SMnX6.png

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