CODEWITHSUNDEEP
javascriptreactjsgoogle-cloud-platformfirebase-authentication
user20326571
user20326571

Reputation:

How to read `state` from Firebase Auth?

Based on the Firebase Auth documentation, I can set custom parameters using the setCustomParameters method on the GoogleAuthProvider

Looking at the parameters accepted by Google's OAuth 2.0 authentication API, it indicates that the state parameter is "an opaque string that is round-tripped".

I am setting the value:

      googleAuthProvider.setCustomParameters({state:"myValue"});

And I can see that is gets added to the URL in the redirect when calling:

      await signInWithRedirect(auth, googleAuthProvider);

However, after authenticating, I do not see any value added to the redirect URL which returns the users to my page.

How can I read the value I passed in to "state"?

Upvotes: 0

Views: 318

Answers (1)

Ronnie Smith
Ronnie Smith

Reputation: 18595

The .onAuthStateChanged event will fire. This is what drives the state of your app/webapp. In terms of getting or reading the state custom parameter, it gets returned to your app via the redirect uri as state=THE_STATE_PARAMETERS.

Sets the OAuth custom parameters to pass in a Google OAuth request for popup and redirect sign-in operations.

https://firebase.google.com/docs/reference/js/v8/firebase.auth.GoogleAuthProvider#setcustomparameters

auth.onAuthStateChanged(function(user) { ...

Upvotes: 1

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