main.py

# Copyright 2018 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# [START gae_python37_app]
from flask import Flask
import requests

import google.auth.transport.requests
from google.oauth2 import id_token


# If `entrypoint` is not defined in app.yaml, App Engine will look for an app
# called `app` in `main.py`.
app = Flask(__name__)

REQUESTS_SESSION = requests.Session()
REQUESTS_SESSION.verify = False
http_request = google.auth.transport.requests.Request(REQUESTS_SESSION)


@app.route("/")
def hello():
    """Return a friendly HTTP greeting."""
    try:
        token = id_token.fetch_id_token(http_request, "https://pubsub.googleapis.com")
    except Exception as e:
        return str(e)
    #return credentials.token
    return token


if __name__ == "__main__":
    # This is used when running locally only. When deploying to Google App
    # Engine, a webserver process such as Gunicorn will serve the app. This
    # can be configured by adding an `entrypoint` to app.yaml.
    app.run(host="127.0.0.1", port=8080, debug=True)
# [END gae_python37_app]