how to use redis as flask session storage

 
Im this tutorial we simply configured redis locally through docker. We can easily configure it with the command below.  

$ docker pull redis:latest $ docker run -d -p 6379:6379 --name session_storage redis:latest

We can check the status of the redis container by entering the command below.

$ docker ps CONTAINER ID  
 

Below is a simple web application that uses Python flask to store and retrieve information in sessions. 

 import redis

from flask import *

from flask_session import Session

app = Flask(__name__)

app.secret_key = 'Skills39Test'

app.config['SESSION_TYPE'] = 'redis'

app.config['SESSION_PERMANENT'] = False

app.config['SESSION_USE_SIGNER'] = True

app.config['SESSION_REDIS'] = redis.from_url('redis://localhost:6379')

server_session = Session(app)

@app.route('/info', methods=['GET','POST'])

def set():

    if request.method == 'GET':

        username = session['username']

        name = session['name']

        message = session['message']

        return jsonify({'username':username,'name':name,'message':message})

    else:

        session['username'] = request.form.get('username')

        session['name'] = request.form.get('name')

        session['message'] = request.form.get('message')

        return jsonify({'upload':'success'})

app.run(host='0.0.0.0', port=8080)

Create the below file for dependencies:

# requirements.txt

flask

flask_session

redis

To check, run the below code using python to check the endpoint response

import requests

res = requests.post("http://localhost:8080/customer", data={'username':'sysops1', 'name':'Bagus Santosa', 'message': 'Hallo World'})

print(res.status_code)

requests.get("http://localhost:8080/info", cookies={'session':session})

print(res.json())

To check inside the Redis. We can access the redis container using the command below. 

$ docker exec -it session_storage redis- 127.0.0.1:6379> keys * 1) "session:session_id"

We can view the information stored in the session by entering the command below. 

127.0.0.1:6379> get session:session_id

Thank you.