a trivial python/flask app that uses Slack for sign-in

README.md

Set up as follows:

Install virtualenvwrapper if it isn't already installed:

pip install virtualenvwrapper

Create a virtualenv, using python 3:

mkvirtualenv --python $(which python3) flask-oauth

Install the requirements:

pip install -r requirements.txt

Set up your Slack application:

https://api.slack.com/docs/sign-in-with-slack

If needed, use ngrok to create a tunnel (and public https url) to your local app.

Save the python file below as runme.py and run it like this:

FLASK_APP=runme.py FLASK_DEBUG=1 flask run -p 8880

The python code refers to github throughout because it was stolen from a github example at https://github.com/lepture/flask-oauthlib/tree/master/example But it does not use github at all, it tries to use Slack.

It does not currently work. What is the secret sauce to make it work?

requirements.txt

appdirs==1.4.3
appnope==0.1.0
click==6.7
decorator==4.0.11
Flask==0.12.1
Flask-OAuthlib==0.9.3
ipython==5.3.0
ipython-genutils==0.2.0
itsdangerous==0.24
Jinja2==2.9.5
MarkupSafe==1.0
oauthlib==2.0.2
packaging==16.8
pexpect==4.2.1
pickleshare==0.7.4
prompt-toolkit==1.0.14
ptyprocess==0.5.1
Pygments==2.2.0
pyparsing==2.2.0
requests==2.13.0
requests-oauthlib==0.8.0
simplegeneric==0.8.1
six==1.10.0
traitlets==4.3.2
wcwidth==0.1.7
Werkzeug==0.12.1

runme.py

from flask import Flask, redirect, url_for, session, request, jsonify
from flask_oauthlib.client import OAuth
import requests


app = Flask(__name__)
app.debug = True
app.secret_key = 'development'
oauth = OAuth(app)

github = oauth.remote_app(
    'github',
    consumer_key='put your key here',
    consumer_secret='put your secret here',
    request_token_params={'scope': 'identity.basic'},
    base_url='https://slack.com/api/',
    request_token_url=None,
    access_token_method='POST',
    access_token_url='https://slack.com/api/oauth.access',
    authorize_url='https://slack.com/oauth/authorize?scope=identity.basic&client_id=put-your-key-here'
)


@app.route('/')
def index():
    if 'github_token' in session:
        me = github.get('user') # this causes an error, there is no such key
        return jsonify(me.data)
    return redirect(url_for('login'))


@app.route('/login')
def login():
    return github.authorize(callback=url_for('authorized', _external=True))


@app.route('/logout')
def logout():
    session.pop('github_token', None)
    return redirect(url_for('index'))


@app.route('/login/authorized')
def authorized():
    resp = github.authorized_response()
    if resp is None or resp.get('access_token') is None:
        return 'Access denied: reason=%s error=%s resp=%s' % (
            request.args['error'],
            request.args['error_description'],
            resp
        )
    session['github_token'] = (resp['access_token'], '')
    me = github.get('user') # this causes an error, there is no such key
    return jsonify(me.data)


@github.tokengetter
def get_github_oauth_token():
    return session.get('github_token')


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

I think your error is simply the fact that github.get('user') should have been resp.get('user')