Rate limiting for flask applications
Project description
Flask-Limiter provides rate limiting features to flask applications.
It allows configuring various backends to persist the rate limits, which is provided by the limits library.
Quickstart
Add the rate limiter to your flask app. The following example uses the default in memory implementation for storage.
from flask import Flask 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=["2 per minute", "1 per second"], ) @app.route("/slow") @limiter.limit("1 per day") def slow(): return "24" @app.route("/fast") def fast(): return "42" @app.route("/ping") @limiter.exempt def ping(): return 'PONG' app.run()
Test it out. The fast endpoint respects the default rate limit while the slow endpoint uses the decorated one. ping has no rate limit associated with it.
$ curl localhost:5000/fast 42 $ curl localhost:5000/fast 42 $ curl localhost:5000/fast <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <title>429 Too Many Requests</title> <h1>Too Many Requests</h1> <p>2 per 1 minute</p> $ curl localhost:5000/slow 24 $ curl localhost:5000/slow <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"> <title>429 Too Many Requests</title> <h1>Too Many Requests</h1> <p>1 per 1 day</p> $ curl localhost:5000/ping PONG $ curl localhost:5000/ping PONG $ curl localhost:5000/ping PONG $ curl localhost:5000/ping PONG
For more details read the docs
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