import ssl
import flask  # noqa
from flask import request  # noqa

app = flask.Flask(__name__)


@app.route('/ip')
def ip():
    return request.remote_addr


def run_app(host: str, port: int, certfile: str = None, keyfile: str = None):
    if certfile and keyfile:
        ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS)
        ssl_context.load_cert_chain(certfile, keyfile)
    else:
        ssl_context = None

    print('Starting http server on {}:{}...'.format(host, port))
    app.run(debug=False, host=host, port=port, threaded=True,
            ssl_context=ssl_context)