sample-flask-api-proxy.py

import requests
from app import app
from flask import Response, request, render_template
from urlparse import urlparse, parse_qsl
import json
from cStringIO import StringIO
import unicodecsv
from time import time
from slughifi import slugify

API_KEY = 'XXXX'
EMAIL = 'newsapps@tribune.com'
BASE_URL = 'http://apiurl.com/v1/'

@app.route('/ical/')
def ical():
    timestamp = int(time())
    context = dict(request.args.items())
    slug = slugify(context['SUMMARY'])
    context['UID'] = "{0}-{1}@events.chicagotribune.com".format(slug, timestamp)
    event = render_template('event.ics', **context)
    ret = Response(response=event, mimetype='text/calendar')
    ret.headers.add('Content-Disposition', 'attachment;filename=event-{0}-{1}.ics'.format(slug, timestamp))
    return ret

@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def proxy(path):
    """Proxy connections to the API"""
    url = "%s/%s" % (BASE_URL, path)
    params = {"api_key": API_KEY}
    args = dict(request.args.items())

    format = args.pop('format', 'json')
    callback = args.pop("callback", "processJSONP")
    params.update(args)
    response = requests.get(url, params=params)
    if response.status_code != 200:
        return Response(response="{'error':'There was an error in the API.'}",
                        status=response.status_code, mimetype='application/javascript')

    data = response.json()
    if format == 'jsonp':
        ret = Response(response="%s(%s)" % (callback, json.dumps(data)),
                       status=200, mimetype='application/javascript')
    else:
        ret = Response(response=json.dumps(data),
                       status=200, mimetype='application/javascript')
        ret.headers.add('Access-Control-Allow-Origin', 'whitelistedorigin.com')

    return ret