CODEWITHSUNDEEP
javascriptnode.js
ethanc
ethanc

Reputation: 137

Post-Redirect-Get in Express Node.js

I am trying to implement a Post-Redirect-Get design pattern into my code, which uses Express. What I have is:

var sessionVariable;

app.post('/user', function(req, res) {
    sessionVariable = req.session;

    // Sets a session variable to a token
    sessionVariable.token = req.body.token;

    // Redirect to /user
    return res.redirect('/user')
});
app.get('/user', function(req, res) {
    sessionVariable = req.session;

     if(sessionVariable.token){
        res.send('Logged in');
     } else {
        res.send('Not logged in');
     }
});

What I expect to happen is when the user submits a POST request to /user, it will define sessionVarlable.token, then redirect to /user again where it checks if a token exists.

What ends up happening is I will submit the POST request, and through console loggging I can see that app.post fires, but it does not re-direct. Instead, it seems to get stuck on the page where the POST request was omitted.

What is the reason for this?

Edit: Any res will not fire under app.post, e.g. res.send('test') doesn't work.

Upvotes: 0

Views: 3121

Answers (2)

imatwork
imatwork

Reputation: 573

I have posted this answer elsewhere: Understanding the "post/redirect/get" pattern

but here is the code that works for me:

app.post('/data', function(req, res) {
  data = req.body;
  res.redirect('/db.html');
});

Upvotes: 1

theob
theob

Reputation: 309

Based on the info from the comments, you're making an AJAX request. Instead of making the client redirect from server-side, just do it client-side. Here's an example using Axios on the browser (you can do essentially the same thing with AJAX, just messier):

axios.post('/user', { token: 'tokenhere'}).then(function(response) {
    // Status 200 means OK 
    if (response.status === 200) {
        window.location.href = 'user'
    }
})

Upvotes: 0

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