Verify Firebase idToken via Python

Question

I'm using Firebase for the first time and am unable to verify that a user is authenticated from the Firebase idToken.

I've attempted to use Google App Engine's example in flask: https://github.com/GoogleCloudPlatform/python-docs-samples/tree/master/appengine/standard/firebase/firenotes.

I've also tried using python libraries mentioned by Firebase here: https://jwt.io/

Any help would be greatly appreciated.

HerberthObregon · Accepted Answer · 2017-02-24 03:57:34Z

2

Simply to identify a user you have to send the token that generates javascript as a header in the request to the server

Authorization:key=eyJhbGc .... ZgeFONFh7HgQ    
id_token = request.headers['Authorization'].split('=').pop()

Once you have that token with the library google.oauth2.id_token will ask for the UID of that generated token

claims = google.oauth2.id_token.verify_firebase_token(id_token, HTTP_REQUEST)
If not claims:
         Return 'Unauthorized', 401
UID = claims['sub']

Already with that UID is like your PK in any DB that you use

answered Feb 24, 2017 at 3:57

HerberthObregon

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4 Comments

user3618914 Over a year ago

That makes sense and is very similar to the google flask example I linked to however I keep getting this error: "from google.appengine.ext import ndb ImportError: No module named appengine.ext"

HerberthObregon Over a year ago

=>1. Install Gcloud. =>2. gcloud components install app-engine-python =>3. run dev server with "$ dev_appserver.py app.yaml" don't use Windows because dosen't work

user3618914 Over a year ago

Thanks! Had to setup everything on my mac and it finally worked after running 'pip install <dependency> -t lib/' for google-auth==0.7.0, requests==2.13.0, requests-toolbelt==0.7.1

Paymahn Moghadasian Over a year ago

where does HTTP_REQUEST come from?

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