Error: Unauthorized access request occurs when the user does not exist in the database

Currently, I am working on implementing a basic login system using express sessions. However, I have encountered an issue where I receive an "Invalid status code" message when the user is not found in the database.

I am aiming to set it up so that if the user cannot be found in the database, the client is redirected to a specific route. Unfortunately, instead of being redirected, an error is thrown.

The system functions flawlessly when a user is found with no bugs present.

If anyone could offer guidance on resolving this problem, I would greatly appreciate it!

Login Route

//@ROUTE: Login Route
//@DESCRIPTION: Displays the login page
app.get('/login', (req, res)=> {
    res.render('login.ejs', {title: "Login :: Clipit", curSession: req.session})
})

Login Post

//@ROUTE: Login Post
//@DESCRIPTION: Searches for the user in the database and logs them in (establishes a new session)
app.post('/api/login', (req, res)=> {
    const username = req.body.inputUsername
    const password = req.body.inputPassword

    userDB.findOne({username: username, password: password}, (err, result)=> {
        if(err) {
            throw err;
        } else if(!result) {
            res.redirect('/login-error', {curSession: req.session})
        } else {
            req.session.username = result.username
            req.session.loggedIn = true
            console.log(`${req.session.username} has logged in.`)
            res.redirect('/')
        }
    })
})

Bug:

express deprecated res.redirect(url, status): Use res.redirect(status, url) instead server.js:185:17
node:events:346
      throw er; // Unhandled 'error' event
      ^

RangeError [ERR_HTTP_INVALID_STATUS_CODE]: Invalid status code: { curSession: [Session] }
    at new NodeError (node:internal/errors:329:5)
    at ServerResponse.writeHead (node:_http_server:282:11)
    at ServerResponse.writeHead (C:\Users\gabri\Desktop\clipit\node_modules\on-headers\index.js:44:26)
    at ServerResponse._implicitHeader (node:_http_server:273:8)
    at writetop (C:\Users\gabri\Desktop\clipit\node_modules\express-session\index.js:276:15)
    at ServerResponse.end (C:\Users\gabri\Desktop\clipit\node_modules\express-session\index.js:356:16)
    at ServerResponse.redirect (C:\Users\gabri\Desktop\clipit\node_modules\express\lib\response.js:951:10)
    at C:\Users\gabri\Desktop\clipit\server.js:185:17
    at C:\Users\gabri\Desktop\clipit\node_modules\mongoose\lib\model.js:4870:18
    at processTicksAndRejections (node:internal/process/task_queues:76:11)
Emitted 'error' event on Function instance at:
    at C:\Users\gabri\Desktop\clipit\node_modules\mongoose\lib\model.js:4872:15
    at processTicksAndRejections (node:internal/process/task_queues:76:11) {
  code: 'ERR_HTTP_INVALID_STATUS_CODE'
}
PS C:\Users\gabri\Desktop\clipit>
node.jsmongodbexpressmongooseexpress-session

Answer №1

Two issues have been detected in your console:

The Warning: 

express deprecated res.redirect(url, status): Use res.redirect(status, url) instead server.js:185:17.
The warning is related to the ordering of parameters in the code snippet provided. The correct order for the res.redirect() function is status followed by url.

You cannot include an object as a parameter. Only a status code and a path are allowed. Consider using either 

res.render('/login-error', {curSession: req.session})
or simply res.redirect('/login-error'), depending on your specific requirements.

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