HTTP Error 400: Bad request to Firebase using Python

Question

I am using the python-firebase library by Ozgur Vatansever for my program.

I have previously been able to write/read data to my firebase, however with the introduction of authentication I cannot. Using:

from firebase import firebase

auth = firebase.FirebaseAuthentication('MY_FIREBASE_SECRET','myEmail@email.com') 
myFirebase = firebase.FirebaseApplication('https://MYFIREBASE.firebaseio.com', auth)

result = myFirebase.get('/users', None) 
print result

Resulting in:

HTTPError: 400 Client Error: Bad Request

Conversely, using no authentication:

 myFirebase = firebase.FirebaseApplication('https://MYFIREBASE.firebaseio.com', None)        
 result = myFirebase.get('/users', None)

works as expected. Any help in why I am getting this HTTP error: 400 , when using authentication is greatly appreciated.

Answer 1

I'm using version 1.2 of the library and python 2.7
In here there's an example on how to connect easily using auth.

import datetime

from firebase.firebase import FirebaseApplication, FirebaseAuthentication


if __name__ == '__main__':
    SECRET = '12345678901234567890'
    DSN = 'https://firebase.localhost'
    EMAIL = 'your@email.com'
    authentication = FirebaseAuthentication(SECRET,EMAIL, True, True)
    firebase = FirebaseApplication(DSN, authentication)

    firebase.get('/users', None,
        params={'print': 'pretty'},
        headers={'X_FANCY_HEADER': 'very fancy'})

data = {'name': 'Ozgur Vatansever', 'age': 26,
    'created_at': datetime.datetime.now()}

snapshot = firebase.post('/users', data)
print(snapshot['name'])

def callback_get(response):
    with open('/dev/null', 'w') as f:
        f.write(response)
firebase.get_async('/users', snapshot['name'], callback=callback_get)

Hope this helps!

Answer 2

I found the same problem, and the problem seems to be that Firebase is rejecting the token that python-firebase builds (in FirebaseTokenGenerator).

I don't know what is wrong with the token being generated, and given that I am happy to use the JWT token provided in the Secrets section of the Firebase Dashboard, this hack works for me:

In firebase.py, class FirebaseAuthentication, right at the start of the get_user method, add an if clause:

def get_user(self):
    if self.extra.get('explicitAuth') is None:
            token = self.authenticator.create_token(self.extra)
    else:
            token = self.extra.get('explicitAuth')

Then when invoking the application provide the explicit token overriding the generated one:

auth = firebase.FirebaseAuthentication('Ignore', 'Ignore', extra={'explicitAuth': myToken})
app = firebase.FirebaseApplication('https://mystuff.firebaseio.com/', auth)

Answer 3

Maybe you should have a look at the docs Custom Authentication

The library you are using takes python-firebase to generate tokens. In your code,

auth = firebase.FirebaseAuthentication('MY_FIREBASE_SECRET','myEmail@email.com')

it should be:

auth = firebase.FirebaseAuthentication('MY_FIREBASE_SECRET','myEmail@email.com', extra={'uid': '123'})

The param extra is the payload to create token and uid is a must as the github page says.

Answer 4

look at the file firebase.py , class FirebaseApplication function _authenticate :

replace 'auth' by 'auth_token' in params.update({'auth_token': user.firebase_auth_token})

fixes this HTTPError: 400 Client Error: Bad Request error but don't fix all auth problems...

Answer 5

Let's try this, Go to Rules tab and set true

{
  "rules": {
    ".read": "true",
    ".write": "true"
  }
}

Code from firebase import firebase

myFirebase = firebase.FirebaseApplication('https://MYFIREBASE.firebaseio.com', None)

result = myFirebase.get('/users', None) 
print result