apiproxy.py

import urllib3
import re
from flask import Flask, request, make_response, url_for
from flask.ext.cors import CORS

app = Flask(__name__)
app.config['IGNORE_REQUEST_HEADERS'] = ['content-length', 'host']
app.config['IGNORE_RESPONSE_HEADERS'] = ['connection', 'transfer-encoding',
                                         'keep-alive', 'content-encoding']
cors = CORS(app)


@app.route('/api/<path:url>',
           methods=['OPTIONS', 'GET', 'POST', 'PUT', 'PATCH', 'DELETE'])
def api(url):
    http = urllib3.PoolManager()
    if request.query_string:
        url += '?' + request.query_string
    data = request.get_data()
    headers = {key: value for (key, value) in request.headers.items()
               if key.lower() not in app.config['IGNORE_REQUEST_HEADERS']}
    if not data:
        r = http.request(request.method, url, headers=headers)
    else:
        headers['Content-Length'] = str(len(data))
        r = http.urlopen(request.method, url, headers=headers, body=data)
    body = re.sub('(http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+)',
                  url_for('api', url='', _external=True) + '\\1', r.data)
    headers = {key: value for (key, value) in r.headers.items()
               if key.lower() not in app.config['IGNORE_RESPONSE_HEADERS']}
    return body, r.status, headers


if __name__ == '__main__':
    app.run(host='0.0.0.0', port=443, debug=True)