Add heroku button

Procfile

@@ -0,0 +1 @@
+web: gunicorn app:app --log-file=-

README.md

@@ -13,7 +13,7 @@ How To Use This
 ---------------
 
 1. Navigate over to https://developer.uber.com/, and sign up for an Uber developer account.
-2. Register a new Uber application and make your Redirect URI http://localhost:7000/submit
+2. Register a new Uber application and make your Redirect URI http://localhost:7000/submit - `profile` and `history` OAuth scopes are required
 3. Fill in the relevant information in the config.json file in the root folder and add your client id and secret as the environment variables UBER_CLIENT_ID AND UBER_CLIENT_SECRET. Run 'export UBER_CLIENT_ID="YOUR_CLIENT_ID"&&export UBER_CLIENT_SECRET="YOUR_CLIENT_SECRET"'
 4. Run ‘pip install -r requirements.txt’ to install dependencies
 5. Run ‘python app.py’
@@ -36,6 +36,14 @@ If you want to work on this application we’d love your pull requests and ticke
 1. If you open up a ticket, please make sure it describes the problem or feature request fully.
 2. If you send us a pull request, make sure you add a test for what you added, and make sure the full test suite runs with nosetests -v.
 
+Deploy to Heroku
+----------------
+
+Click the buttom below to set up this sample app on Heroku:
+
+[![Deploy](https://www.herokucdn.com/deploy/button.png)](https://heroku.com/deploy)
+
+After creating your app on Heroku, you have to configure the redirect url for your Uber OAuth app. Use a `https://{my-app-name}.herokuapp.com/submit` url.
 
 Making Requests
 ---------------

app.json

@@ -0,0 +1,14 @@
+{
+  "name": "Uber API Python/Flask sample",
+  "logo": "http://blogcdn.uber.com/wp-content/uploads/2011/12/New-Logo-Vertical-Dark.jpg",
+  "repository": "https://github.com/uber/Python-Sample-Application",
+  "keywords": ["uber", "python", "flask"],
+  "env": {
+    "UBER_CLIENT_ID": {
+      "description": "Your Uber API client id"
+    },
+    "UBER_CLIENT_SECRET": {
+      "description": "Your Uber API client secret"
+    }
+  }
+}

app.py

@@ -1,15 +1,19 @@
 from __future__ import absolute_import
+
+import json
+import os
+from urlparse import urlparse
+
 from flask import Flask, render_template, request, redirect, session
+from flask_sslify import SSLify
 from rauth import OAuth2Service
-
 import requests
-import os
-import json
 
 app = Flask(__name__, static_folder='static', static_url_path='')
 app.requests_session = requests.Session()
 app.secret_key = os.urandom(24)
 
+sslify = SSLify(app)
 
 with open('config.json') as f:
     config = json.load(f)
@@ -49,7 +53,7 @@ def signup():
     """
     params = {
         'response_type': 'code',
-        'redirect_uri': config.get('redirect_uri'),
+        'redirect_uri': get_redirect_uri(request),
         'scope': config.get('scopes'),
     }
     url = generate_oauth_service().get_authorize_url(**params)
@@ -64,7 +68,7 @@ def submit():
     a code that can be used to obtain an access token for the logged-in use.
     """
     params = {
-        'redirect_uri': config.get('redirect_uri'),
+        'redirect_uri': get_redirect_uri(request),
         'code': request.args.get('code'),
         'grant_type': 'authorization_code'
     }
@@ -214,6 +218,12 @@ def me():
         data=response.text,
     )
 
+def get_redirect_uri(request):
+    """Returns OAuth redirect URI."""
+    parsed_url = urlparse(request.url)
+    if parsed_url.hostname == 'localhost':
+        return 'http://{hostname}:{port}/submit'.format(hostname=parsed_url.hostname, port=parsed_url.port)
+    return 'https://{hostname}/submit'.format(hostname=parsed_url.hostname)
 
 if __name__ == '__main__':
     app.run(port=7000)

config.json

@@ -1,5 +1,4 @@
 {
-    "redirect_uri": "http://localhost:7000/submit",
     "access_token_url": "https://login.uber.com/oauth/token",
     "authorize_url": "https://login.uber.com/oauth/authorize",
     "base_url": "https://login.uber.com/",

requirements.txt

@@ -9,3 +9,6 @@ nose==1.3.3
 rauth==0.7.0
 requests==2.3.0
 wsgiref==0.1.2
+
+gunicorn==18.0
+Flask-SSLify==0.1.4