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Captcha implementation for flask and flask-session.

Project description

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A captcha implemention for flask using flask-sessionstore and captcha packages. Each captcha challenge answer is saved in the server side session of the challenged client.

For now it supports only simple numeric image captchas, but more could easily be added from the underlying captcha package.

Requirements

Usage

import uuid
import logging
from flask import Flask, request, render_template
from flask_session import Session
from flask_session_captcha import FlaskSessionCaptcha

app = Flask(__name__)
app.config["SECRET_KEY"] = uuid.uuid4()
app.config['CAPTCHA_ENABLE'] = True
app.config['CAPTCHA_NUMERIC_DIGITS'] = 5
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite://'
app.config['SESSION_TYPE'] = 'sqlalchemy'
Session(app)
captcha = FlaskSessionCaptcha(app)

@app.route('/', methods=['POST','GET'])
def some_route():
    if request.method == "POST":
        if captcha.validate():
            return "success"
        else:
            return "fail"

    return render_template("form.html")

if __name__ == "__main__":
    app.debug = True
    logging.getLogger().setLevel("DEBUG")
    app.run()

Template can look as follows. captcha.validate() will be default try to validate against a form input with name “captcha”.

<form method="POST">
    {{ captcha() }} <!-- This renders an <img> tag with the captcha img. -->
    <input type="text" name="captcha">
    <input type="submit">
</form>

Project details


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Filename, size & hash SHA256 hash help File type Python version Upload date
flask_session_captcha-1.1.0-py2.py3-none-any.whl (6.0 kB) Copy SHA256 hash SHA256 Wheel py2.py3 Aug 12, 2017

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