Simple python example using flask, flask_oidc and keycloak

app.py

import json
import logging

from flask import Flask, g
from flask_oidc import OpenIDConnect
import requests

logging.basicConfig(level=logging.DEBUG)

app = Flask(__name__)
app.config.update({
    'SECRET_KEY': 'SomethingNotEntirelySecret',
    'TESTING': True,
    'DEBUG': True,
    'OIDC_CLIENT_SECRETS': 'client_secrets.json',
    'OIDC_ID_TOKEN_COOKIE_SECURE': False,
    'OIDC_REQUIRE_VERIFIED_EMAIL': False,
    'OIDC_USER_INFO_ENABLED': True,
    'OIDC_OPENID_REALM': 'flask-demo',
    'OIDC_SCOPES': ['openid', 'email', 'profile'],
    'OIDC_INTROSPECTION_AUTH_METHOD': 'client_secret_post'
})

oidc = OpenIDConnect(app)


@app.route('/')
def hello_world():
    if oidc.user_loggedin:
        return ('Hello, %s, <a href="/private">See private</a> '
                '<a href="/logout">Log out</a>') % \
            oidc.user_getfield('preferred_username')
    else:
        return 'Welcome anonymous, <a href="/private">Log in</a>'


@app.route('/private')
@oidc.require_login
def hello_me():
    """Example for protected endpoint that extracts private information from the OpenID Connect id_token.
       Uses the accompanied access_token to access a backend service.
    """

    info = oidc.user_getinfo(['preferred_username', 'email', 'sub'])

    username = info.get('preferred_username')
    email = info.get('email')
    user_id = info.get('sub')

    if user_id in oidc.credentials_store:
        try:
            from oauth2client.client import OAuth2Credentials
            access_token = OAuth2Credentials.from_json(oidc.credentials_store[user_id]).access_token
            print 'access_token=<%s>' % access_token
            headers = {'Authorization': 'Bearer %s' % (access_token)}
            # YOLO
            greeting = requests.get('http://localhost:8080/greeting', headers=headers).text
        except:
            print "Could not access greeting-service"
            greeting = "Hello %s" % username
    

    return ("""%s your email is %s and your user_id is %s!
               <ul>
                 <li><a href="/">Home</a></li>
                 <li><a href="//localhost:8081/auth/realms/pysaar/account?referrer=flask-app&referrer_uri=http://localhost:5000/private&">Account</a></li>
                </ul>""" %
            (greeting, email, user_id))


@app.route('/api', methods=['POST'])
@oidc.accept_token(require_token=True, scopes_required=['openid'])
def hello_api():
    """OAuth 2.0 protected API endpoint accessible via AccessToken"""

    return json.dumps({'hello': 'Welcome %s' % g.oidc_token_info['sub']})


@app.route('/logout')
def logout():
    """Performs local logout by removing the session cookie."""

    oidc.logout()
    return 'Hi, you have been logged out! <a href="/">Return</a>'


if __name__ == '__main__':
    app.run()

client_secrets.json

{
    "web": {
        "issuer": "http://localhost:8081/auth/realms/pysaar",
        "auth_uri": "http://localhost:8081/auth/realms/pysaar/protocol/openid-connect/auth",
        "client_id": "flask-app",
        "client_secret": "a41060dd-b5a8-472e-a91f-6a3ab0e04714",
        "redirect_uris": [
            "http://localhost:5000/*"
        ],
        "userinfo_uri": "http://localhost:8081/auth/realms/pysaar/protocol/openid-connect/userinfo", 
        "token_uri": "http://localhost:8081/auth/realms/pysaar/protocol/openid-connect/token",
        "token_introspection_uri": "http://localhost:8081/auth/realms/pysaar/protocol/openid-connect/token/introspect"
    }
}

Hello! @alex27riva
I got it working! 🎉 GitHub Gist Link

docker run -p 8080:8080 -e KEYCLOAK_ADMIN=admin -e KEYCLOAK_ADMIN_PASSWORD=admin quay.io/keycloak/keycloak:24.0.1 start-dev

Then I built the realm and client, and modified the code according to the latest release of flask-oidc (1.2.0) (Sep 28, 2017).
Thank you!
If you've discovered a new way to deal with Flask Keycloak, please let me know too!

Hi @LUCIFERsDen26 , thank your for your reply. I tried your code, but I'm getting the same error as before. Are these client setting correct?

Hey!
thanks for reaching out!
the adress should be same as you python flask app is running on like shown in image!

BTW it has username : lucifer
password: test (i guess, i dont remenber, i change it from admin account)