Remote Address API server

server.py

#!/usr/bin/env python3

import json

from werkzeug.wrappers import Request, Response
from werkzeug.middleware.proxy_fix import ProxyFix


@Request.application
def application(request):
    data = {'addr': request.environ['REMOTE_ADDR']}
    text = json.dumps(data, sort_keys=True)
    response = Response(text)
    response.headers['content-type'] = 'application/json'
    response.headers['content-length'] = len(response.data)
    return response


if __name__ == '__main__':
    from werkzeug.serving import run_simple
    proxyapp = ProxyFix(application, x_for=1, x_host=1)
    run_simple('localhost', 4000, proxyapp)