Toy URL shortener with Flask, Redis, and BaseConverter

crunch.py

from baseconv import BaseConverter
from flask import Flask, abort, make_response, redirect, request, url_for
from flask.ext.redis import FlaskRedis

app = Flask(__name__)
store = FlaskRedis(app)
converter = BaseConverter('23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz')


@app.route('/<shortcode>')
def resolve_url(shortcode):
    url = store.get('crunch-url:{shortcode}'.format(shortcode=shortcode))
    if url:
        return redirect(url, 301)
    abort(404)


@app.route('/', methods=['POST'])
def shorten_url():
    url = request.form['url']
    shortcode = converter.encode(store.incr('crunch-id'))
    store.set('crunch-url:{shortcode}'.format(shortcode=shortcode), url)
    return make_response(url_for('resolve_url', shortcode=shortcode), 201)


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

requirements.txt

Flask==0.10.1
Flask-Redis==0.1.0
itsdangerous==0.24
Jinja2==2.8
MarkupSafe==0.23
python-baseconv==1.1.3
redis==2.10.5
Werkzeug==0.11.4