[FIXED] How to see how Android Firebase auth actually calls Firebase backend?

Issue

For example if I executed code like this:

Firebase.auth.signInWithEmailAndPassword(email, password)
    .addOnCompleteListener { task -> signInCompletedTask(task) }

I would like to see what http request (and with what headers) is actually sent to Firebase backend.

What I tried:

• To find anything useful in logs, but I didn't see any information about this.
• To run application with debugger, but inside FirebaseAuth.class everything went so complicated that I still couldn't figure out where is the actual http request made.
• I tried to look for a source code for com.google.firebase.auth.FirebaseAuth.java, I found this https://github.com/firebase/firebase-admin-java/blob/master/src/main/java/com/google/firebase/auth/FirebaseAuth.java but this class seems wrong, it doesn't even have signInWithEmailAndPassword(..) method

In firebase doc I find this link https://firebase.google.com/docs/reference/rest/auth#section-sign-in-email-password, but I'm not sure is this the same thing or not.

So bottom line, how can I debug what data is moving between my android application and Firebase backend?

Solution

firebaser here

The source code you looked at is for the Admin SDK for Java backends, which doesn't have a way to sign in, but has lots of other useful calls for administrative/backend functionality.

For the Firebase Authentication Android SDK the code is in this repo firebase-android-sdk, but you'll find that the Authentication SDK is not in there (yet). If I recall correctly it was too entangled with Play to release it.

The Authentication SDK makes calls to the REST API though, and those endpoints are all documented here, like the API to sign in with email+password.

Answered By - Frank van Puffelen
Answer Checked By - Pedro (JavaFixing Volunteer)