Flask-Limiter for rate limiting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Flask-Limiter extension.

Flask

from flask_limiter import [1]

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

ALimiter

BLimiterExtension

CRateLimiter

DLimiterTool

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect class names like 'RateLimiter' or 'LimiterExtension'.

Trying to import from 'flask_limiter_extension' instead of 'flask_limiter'.

The Flask-Limiter extension is imported using Limiter.

2fill in blank

medium

Complete the code to create a Flask app and initialize Limiter with a default rate limit of 5 per minute.

Flask

app = Flask(__name__)
limiter = Limiter(app, default_limits=["[1]"])

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

A5 per minute

B10 per second

C100 per hour

D1 per day

Attempts:

3 left

💡 Hint

Common Mistakes

Using numbers without quotes.

Using wrong time units like 'per seconds' instead of 'per second'.

The default rate limit is set as a string like '5 per minute' to limit requests to 5 each minute.

3fill in blank

hard

Fix the error in the route decorator to apply a rate limit of 3 per minute.

Flask

@app.route("/")
@limiter.limit("[1]")
def home():
    return "Hello!"

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

A3 per second

B3 per hour

C3 per day

D3 per minute

Attempts:

3 left

💡 Hint

Common Mistakes

Using '3 per seconds' which is grammatically incorrect.

Using '3 per hour' which is a different rate.

The rate limit string must be '3 per minute' to limit to 3 requests each minute.

4fill in blank

hard

Fill both blanks to create a rate limit key function that limits by remote address.

Flask

limiter = Limiter(app, key_func=[1], default_limits=["10 per minute"])

@app.route("/data")
@limiter.limit("5 per minute", key_func=[2])
def data():
    return "Data"

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

Aget_remote_address

Bremote_addr

Cclient_ip

Duser_ip

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names like 'remote_addr' instead of the function.

Using made-up names like 'client_ip' or 'user_ip'.

The function get_remote_address is used by Flask-Limiter to get the client's IP address for rate limiting.

5fill in blank

hard

Fill all three blanks to create a custom error message for rate limit exceeded.

Flask

from flask import Flask, jsonify
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address

app = Flask(__name__)
limiter = Limiter(app, key_func=get_remote_address, default_limits=["5 per minute"])

@app.errorhandler([1])
def ratelimit_handler(e):
    return jsonify(error="[2]"), [3]

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

A429

BRate limit exceeded. Try again later.

C429 Too Many Requests

D403

Attempts:

3 left

💡 Hint

Common Mistakes

Using 403 Forbidden instead of 429.

Returning a status code as a string instead of an integer.

The HTTP status code for rate limit exceeded is 429. The error message is a friendly string. The handler returns status code 429.