main.py

# Copied from https://github.com/Azure-Samples/azure-voting-app-redis

from flask import Flask, request, render_template
import os
import random
import redis
import socket
import sys

app = Flask(__name__)

# Load configurations
app.config.from_pyfile("config_file.cfg")
button1 = app.config["VOTE1VALUE"]
button2 = app.config["VOTE2VALUE"]
title = app.config["TITLE"]

# Redis configurations
redis_server = os.environ["REDIS"]
redis_port = os.environ["REDIS_PORT"]
redis_password = os.environ["REDIS_PWD"]

# Redis Connection
try:
    r = redis.StrictRedis(host=redis_server, port=redis_port, password=redis_password)
    r.ping()
except redis.ConnectionError:
    exit("Failed to connect to Redis, terminating.")

# Init Redis
if not r.get(button1):
    r.set(button1, 0)
if not r.get(button2):
    r.set(button2, 0)


@app.route("/", methods=["GET", "POST"])
def index():

    if request.method == "GET":

        # Get current values
        vote1 = r.get(button1).decode("utf-8")
        vote2 = r.get(button2).decode("utf-8")

        # Return index with values
        return render_template(
            "index.html",
            value1=int(vote1),
            value2=int(vote2),
            button1=button1,
            button2=button2,
            title=title,
        )

    elif request.method == "POST":

        if request.form["vote"] == "reset":

            # Empty table and return results
            r.set(button1, 0)
            r.set(button2, 0)
            vote1 = r.get(button1).decode("utf-8")
            vote2 = r.get(button2).decode("utf-8")
            return render_template(
                "index.html",
                value1=int(vote1),
                value2=int(vote2),
                button1=button1,
                button2=button2,
                title=title,
            )

        else:

            # Insert vote result into DB
            vote = request.form["vote"]
            r.incr(vote, 1)

            # Get current values
            vote1 = r.get(button1).decode("utf-8")
            vote2 = r.get(button2).decode("utf-8")

            # Return results
            return render_template(
                "index.html",
                value1=int(vote1),
                value2=int(vote2),
                button1=button1,
                button2=button2,
                title=title,
            )


if __name__ == "__main__":
    app.run()