How to know when auth token has expired

[Adam Brooks]

Hi,

Outside of simple auth how should my app tell when the auth token has expired? Using FirebaseAuthClient I get callbacks when the status of the user changes, but I don't get this with .auth(). How should I track the expiry?

(I think Firebase spoiled me with the simple auth. Using anything else know just feels painful!)

Cheers,
Adam.

[Andrew Lee]

Adam - 

Take a look at the docs for auth:

https://www.firebase.com/docs/javascript/firebase/auth.html

There's an onComplete that gets called with an Error if the authentication failed. There's also an onCancel that gets called later on if the token expires.

-Andrew

On Thu, Jun 6, 2013 at 9:03 AM, Jonathan Friedman <kg4...@gmail.com> wrote:

We just wait for a request to fail and reauthenticate as needed.

Coffeescript (runs on client):

dataRef.auth firebaseToken, (error) ->

        if error?

          if error.code is "EXPIRED_TOKEN"

            console.log "[firebaseAuthError]", "EXPIRED_TOKEN Reconnecting..."

            newToken = true

            token connect

            return

          else

            console.log "[firebaseAuthError]", "Login failed!", error

            return

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Founder, Firebase

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[Adam Brooks]

Thanks Jonathan.

How does this fit in the flow? Do you call .auth() before every Firebase operation?

Adam.

On Thu, Jun 6, 2013 at 5:03 PM, Jonathan Friedman <kg4...@gmail.com> wrote:

We just wait for a request to fail and reauthenticate as needed.

Coffeescript (runs on client):

dataRef.auth firebaseToken, (error) ->

        if error?

          if error.code is "EXPIRED_TOKEN"

            console.log "[firebaseAuthError]", "EXPIRED_TOKEN Reconnecting..."

            newToken = true

            token connect

            return

          else

            console.log "[firebaseAuthError]", "Login failed!", error

            return

On Thursday, June 6, 2013 10:58:51 AM UTC-5, Adam Brooks wrote:

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[Andrew Lee]

Adam -

You should only ever call auth() once for each authentication. Just monitor the 2 callbacks: onComplete and onCancel to know when things fail or expire.

-Andrew

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[Adam Brooks]

Ah, great, thanks Andrew.

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[Jonathan Friedman]

The docs say:

auth( authToken, [onComplete][onCancel] )

Is there a missing comma between the two function pointers? Like this:

auth( authToken, [onComplete], [onCancel] )

The usage example shows only one function. Is it used for both purposes?

dataRef.auth(AUTH_TOKEN, function(error) {

Should that be:

dataRef.auth(AUTH_TOKEN, function(error) {..}, function(error) {..})

To use both callbacks?

Thanks,

-Jonathan

[Rob DiMarco]

Hi gents -

At a high level, your application should be using either custom login (where you generate a token and pass it to Firebase via .auth()) or Simple Login (where you use the FirebaseAuthClient and call .login() to invoke a specific login method).

In Simple Login, the callback that you pass to the FirebaseAuthClient constructor will be invoked once after instantiation with the current state of the user, and again any time the user's login state changes. So if the underlying session expires, or the user logs out, or the Firebase auth. token that is automatically generated by Simple Login expires, this callback will be invoked with user=null, error=null to indicate that the user is logged out, and you should attempt to reauthenticate.

I hope that makes sense and helps!

Rob