# coding: utf-8

from functools import wraps
from flask import request, Response, Flask


def check_auth(username, password):
    """This function is called to check if a username /
    password combination is valid.
    """
    return username == 'admin' and password == 'secret'


def authenticate():
    """Sends a 401 response that enables basic auth"""
    return Response(
        'Could not verify your access level for that URL.\n'
        'You have to login with proper credentials', 401,
        {'WWW-Authenticate': 'Basic realm="Login Required"'})


def requires_auth(f):
    @wraps(f)
    def decorated(*args, **kwargs):
        auth = request.authorization
        if not auth or not check_auth(auth.username, auth.password):
            return authenticate()
        return f(*args, **kwargs)
    return decorated


app = Flask(__name__)


@app.route('/secret-page')
@requires_auth
def secret_page():
    return 'secret_page'


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