gistfile1.txt

from datetime import datetime
from kinto.core import Service
import requests


def fb_authenticate(user_id, access_token):
    url = "https://graph.facebook.com/v2.8/me"
    data = {
        'fields': 'id,name',
        'access_token': access_token
    }
    resp = requests.get(url, params=data)
    fbdata = resp.json()

    if fbdata['id'] == user_id:
        return user_id


token_exchange = Service(
    name='token_exchange',
    path='/token-exchange',
    description='FB to JWT token exchange and login.',
)


@token_exchange.post()
def exchange(request):

    d = request.json_body
    user_id = d['user_id']
    access_token = d['access_token']

    user_id = fb_authenticate(user_id, access_token)

    if user_id:
        token = request.create_jwt_token(user_id)
        delta = int(request.registry.settings['jwt.expiration'])
        expires = int(datetime.now().timestamp()) + delta
        res = {
            'result': 'ok',
            'token': token,
            'expires': expires
        }
        return res

    return {
        'result': 'error'
    }