add github example

Author: lepture

example/github.py

@@ -0,0 +1,61 @@
+from flask import Flask, redirect, url_for, session, request, jsonify
+from flask_oauthlib.client import OAuth
+
+
+app = Flask(__name__)
+app.debug = True
+app.secret_key = 'development'
+oauth = OAuth()
+
+github = oauth.remote_app(
+    'github',
+    consumer_key='a11a1bda412d928fb39a',
+    consumer_secret='92b7cf30bc42c49d589a10372c3f9ff3bb310037',
+    request_token_params={'scope': 'user:email'},
+    base_url='https://api.github.com/',
+    request_token_url=None,
+    access_token_method='POST',
+    access_token_url='https://github.com/login/oauth/access_token',
+    authorize_url='https://github.com/login/oauth/authorize'
+)
+
+
+@app.route('/')
+def index():
+    if 'github_token' in session:
+        me = github.get('user')
+        return jsonify(me)
+    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')
+@github.authorized_handler
+def authorized(resp):
+    if resp is None:
+        return 'Access denied: reason=%s error=%s' % (
+            request.args['error_reason'],
+            request.args['error_description']
+        )
+    session['github_token'] = (resp['access_token'], '')
+    me = github.get('user')
+    return jsonify(me)
+
+
+@github.tokengetter
+def get_github_oauth_token():
+    return session.get('github_token')
+
+
+if __name__ == '__main__':
+    app.run()