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Add an example for IAP on GCE #1099

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Sep 13, 2017
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30 changes: 30 additions & 0 deletions iap/example_gce_backend.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
CLOUD_PROJECT_ID = 'YOUR_PROJECT_ID'
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This file needs a license header.

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You need to put constant after imports to please the linter.

BACKEND_SERVICE_ID = 'YOUR_BACKEND_SERVICE_ID'

from flask import Flask
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Import modules, not members, so just import flask and use flask.Flask and flask.request.

from flask import request

import platform
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Standard library imports go into the first section:

import platform

import flask

import validate_jwt


from validate_jwt import validate_iap_jwt_from_compute_engine

app = Flask(__name__)

@app.route('/')
def root():
jwt = request.headers.get('x-goog-iap-jwt-assertion')
if jwt is None:
return 'Unauthorized request.', 401
user_id, user_email, error_str = validate_iap_jwt_from_compute_engine(
jwt, CLOUD_PROJECT_ID, BACKEND_SERVICE_ID)
if error_str:
return "Error: %s" % error_str
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Use single quotes everywhere (except docstrings), and use .format over %.

else:
return "Hi, {}. I am {}.".format(user_email, platform.node())

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style: two blank spaces between functions.

@app.route('/healthz')
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Why's this needed?

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It's not, actually. I've taken it out.

def health():
return 'OK', 200

if __name__ == '__main__':
app.run(host='0.0.0.0', port=80)
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just use app.run(), do not bind to a specific port. Use gunicorn to run this in production.

1 change: 1 addition & 0 deletions iap/requirements.txt
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
PyJWT==1.5.2
cryptography==2.0.3
flask
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You must pin versions.

google-auth==1.0.2
requests==2.18.4
requests_toolbelt==0.8.0