app.py

from flask import Flask, render_template, request, make_response, g
from redis import Redis
import os
import socket
import random
import json

option_a = os.getenv("OPTION_A", "Visual Studio")
option_b = os.getenv("OPTION_B", "JetBrains Rider")
hostname = socket.gethostname()
version = "v1"

app = Flask(__name__)


def get_redis():
    if not hasattr(g, "redis"):
        g.redis = Redis(host="redis", db=0, socket_timeout=5)
    return g.redis


@app.route("/", methods=["POST", "GET"])
def hello():
    voter_id = request.cookies.get("voter_id")
    if not voter_id:
        voter_id = hex(random.getrandbits(64))[2:-1]

    vote = None

    if request.method == "POST":
        redis = get_redis()
        vote = request.form["vote"]
        data = json.dumps({"voter_id": voter_id, "vote": vote})
        redis.rpush("votes", data)

    resp = make_response(
        render_template(
            "index.html",
            option_a=option_a,
            option_b=option_b,
            hostname=hostname,
            vote=vote,
            version=version,
        )
    )
    resp.set_cookie("voter_id", voter_id)
    return resp


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=80, debug=True, threaded=True)