The session is unavailable because no secret key was set.

[raucci2000]

Hi guys! I'm trying to use flask-session, but something happening.

ERROR MESSAGE:
RuntimeError: The session is unavailable because no secret key was set. Set the secret_key on the application to something unique and secret.

MY CODE:
from flask import request, url_for, Flask, Response, session
from flask_session import Session
import os

app = Flask(name)
SESSION_TYPE='redis'
PERMANENT_SESSION_LIFETIME=1800

app.config.update(
SECRET_KEY=os.urandom(24)
)

app.config.from_object(name)
Session(app)
app.run()

TESTING SESSION:
session["key"]="test 123"

[frostming]

Try this snippet

from flask import Flask, session
from flask_session import Session
import os

app = Flask(__name__)
SESSION_TYPE = "redis"
PERMANENT_SESSION_LIFETIME = 1800

app.config.update(SECRET_KEY=os.urandom(24))

app.config.from_object(__name__)
Session(app)

if __name__ == "__main__":
    with app.test_request_context("/"):
        session["key"] = "value"

you can run the script directly, but I can't reproduce the issue as you described.

[sginne]

Have the same problem.
init.py of app

app = Flask(name, static_folder='./static/')
app.config.from_pyfile('../allium.cfg')
app.config.update(SECRET_KEY=app.secret_key)
Session(app)

allium.cfg

import random,string
SESSTION_TYPE="memcached"
WTF_CSRF_ENABLED=True
SECRET_KEY = ''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(52))

And

session['masterkey']='masterkey'
in Blueprint

gives:

FLASK_APP = run.py
FLASK_ENV = development
FLASK_DEBUG = 0
In folder /home/sginne/dev/src/Allium
/home/sginne/dev/src/Allium/venv/bin/python3.7 -m flask run

• Serving Flask app "run.py"
• Environment: development
• Debug mode: off
  ESNIOK2NVCW9BKDJ9MVXKL8DAXCA03GRAHRA517KVMKIZP6PZN86
• Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
  no master key
  [2020-02-12 20:32:59,990] ERROR in app: Exception on /admin [GET]
  Traceback (most recent call last):
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/app.py", line 2446, in wsgi_app
  response = self.full_dispatch_request()
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/app.py", line 1951, in full_dispatch_request
  rv = self.handle_user_exception(e)
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/app.py", line 1820, in handle_user_exception
  reraise(exc_type, exc_value, tb)
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/_compat.py", line 39, in reraise
  raise value
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/app.py", line 1949, in full_dispatch_request
  rv = self.dispatch_request()
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/app.py", line 1935, in dispatch_request
  return self.view_functionsrule.endpoint
  File "/home/sginne/dev/src/Allium/app/routes/admin.py", line 9, in admin
  session['masterkey']='masterkey'
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/werkzeug/local.py", line 350, in setitem
  self._get_current_object()[key] = value
  File "/home/sginne/dev/src/Allium/venv/lib64/python3.7/site-packages/flask/sessions.py", line 103, in _fail
  "The session is unavailable because no secret "
  RuntimeError: The session is unavailable because no secret key was set. Set the secret_key on the application to something unique and secret.
  127.0.0.1 - - [12/Feb/2020 20:32:59] "GET /admin HTTP/1.1" 500 -

?

[psdon]

Got the same error even SECRET_KEY was set

[Armster15]

For me it works when you add:

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

Anyways this project seems dead , and the forks of this project are also dead. Any good alternatives to this library?

[tf42src]

For me it works when you add:

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

Anyways this project seems dead , and the forks of this project are also dead. Any good alternatives to this library?

If it is complete and works as expected, you can still use it?

[cgironda]

I am not using even a session in my Flask application but I need to define the code below to get the flash message on my HTML homepage.
app.secret_key="anystringhere"

otherwise, I get the message below:
The session is unavailable because no secret key was set.

Do I really need to define a secret key under this situation?

[b-simjoo]

I have the same problem, many times ago I wrote a program that used session and I didn't need to set SECRET_KEY and everything worked fine, now even if I set SECRET_KEY it does not work and throw exception for every request. I tried all different ways to configure, even I used debugger to trace SECRET_KEY and everything seemed OK, it was there! but it keep saying that SECRET_KEY is not set.

[christopherpickering]

This should be fixed in release 0.5.0, coming soon.

[rayluo]

This should be fixed in release 0.5.0, coming soon.

The change in release 0.5.0 does not seem to be relevant to this issue. That being said, it is fine to close it. People can always reopen it if necessary.

[AMAN1620]

from flask_session import Session
from flask import Flask, render_template, request, jsonify,session,redirect

app = Flask(name)
app.secret_key = '_5#y2L"F4Q8z\n\xec]/'
app.config["SESSION_PERMANENT"] = True
app.config["PERMANENT_SESSION_LIFETIME"] = 300
app.config['SESSION_TYPE'] = 'filesystem'
Session(app)

@app.route("/")
def index_get():
return render_template("base.html")

after adding the session_type it worked

[Lxstr]

@AMAN1620 Which version are you using? In 0.6.0 and up you shouldn't need to set a secret key unless you are using SESSION_USE_SIGNER