How cookies work in HTTP in Flask - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a cookie named 'user' with value 'Alice' in a Flask response.

Flask

from flask import Flask, make_response
app = Flask(__name__)

@app.route('/')
def index():
    resp = make_response('Hello World')
    resp.set_cookie('[1]', 'Alice')
    return resp

Drag options to blanks, or click blank then click option'

Auser

Bsession

Cusername

Dcookie

Attempts:

3 left

💡 Hint

Common Mistakes

Using a wrong cookie name like 'session' or 'cookie' instead of 'user'.

Forgetting to call set_cookie on the response object.

The set_cookie method requires the cookie name as the first argument. Here, the cookie name is 'user'.

2fill in blank

medium

Complete the code to read the cookie named 'user' from the Flask request.

Flask

from flask import Flask, request
app = Flask(__name__)

@app.route('/')
def index():
    user = request.cookies.get('[1]')
    return f'User is {user}'

Drag options to blanks, or click blank then click option'

Ausername

Bsession

Cuser

Dcookie

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different cookie name than the one set.

Trying to access cookies directly without using request.cookies.get().

To read a cookie, use request.cookies.get() with the cookie name. Here, the cookie name is 'user'.

3fill in blank

hard

Fix the error in the code to delete the cookie named 'user' in the Flask response.

Flask

from flask import Flask, make_response
app = Flask(__name__)

@app.route('/logout')
def logout():
    resp = make_response('Logged out')
    resp.[1]('user')
    return resp

Drag options to blanks, or click blank then click option'

Adelete_cookie

Bset_cookie

Cclear_cookie

Dremove_cookie

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method like 'remove_cookie'.

Trying to delete cookie by setting it to None without proper method.

To delete a cookie in Flask, call resp.delete_cookie('user'). This instructs the browser to remove the cookie by setting its expiration time to the past.

4fill in blank

hard

Fill both blanks to create a cookie named 'session_id' with value 'abc123' that expires in 1 day.

Flask

from flask import Flask, make_response
from datetime import timedelta
app = Flask(__name__)

@app.route('/set')
def set_cookie():
    resp = make_response('Cookie set')
    resp.set_cookie('[1]', '[2]', max_age=86400)
    return resp

Drag options to blanks, or click blank then click option'

Asession_id

Babc123

Cuser

Dtoken

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong cookie names or values.

Not setting max_age to control cookie expiration.

The first blank is the cookie name 'session_id'. The second blank is the cookie value 'abc123'. The max_age=86400 sets the cookie to expire in 1 day (86400 seconds).

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps cookie names to their values for cookies with names starting with 'sess'.

Flask

cookies = [1]: [2] for [3] in request.cookies if [3].startswith('sess')}

Drag options to blanks, or click blank then click option'

Aname

Brequest.cookies[name]

Dcookie

Frequest.cookies[cookie]

Attempts:

3 left

💡 Hint

Common Mistakes

Using inconsistent variable names in the comprehension.

Trying to use the cookie value as the loop variable.

The dictionary comprehension uses name as the variable for cookie names. The key is name, the value is request.cookies[name], and the loop variable is name. This collects all cookies whose names start with 'sess'.