Django Simple Captcha

About

Django Simple Captcha is an extremely simple, yet highly customizable Django application to add captcha images to any Django form.

Usage

Sample view:

from django import forms
from captcha.fields import CaptchaField
from django.shortcuts import render_to_response

class CaptchaTestForm(forms.Form):
    myfield = AnyOtherField()
    captcha = CaptchaField()

"""
# or, as a ModelForm:
class CaptchaTestModelForm(forms.ModelForm):
    captcha = CaptchaField()
    class Meta:
        model = MyModel
"""

def home(request):
    if request.POST:
        form = CaptchaTestForm(request.POST)

        # Validate the form: the captcha field will automatically 
        # check the input
        if form.is_valid():
            human = True
    else:
        form = CaptchaTestForm()

    return render_to_response('base.html',locals())

Features

• Very simple to setup and deploy, yet very configurable
• Can use custom challenges (e.g. random chars, simple maths, dictionary word, ...)
• Custom generators, noise and filter functions alter the look of the generated image
• Supports text-to-speech audio output of the challenge text, for improved accessibility

Requirements

• Django 1.0+
• A fairly recent version of the Python Imaging Library (PIL) compiled with FreeType support
• Flite is required for text-to-speech (audio) output, but not mandatory

Installation

1. Download the 'captcha' application and put it anywhere in your Python path
2. Add 'captcha' to the INSTALLED_APPS in your settings.py
3. Run manage.py syncdb to create the required database tables
4. Add an entry to your urls.py:

urlpatterns += patterns('',
    url(r'^captcha/', include('captcha.urls')),
)

Configuration

See CaptchaConfiguration for details on available configuration settings.

Generators

See CaptchaGenerators for a list of available challenge generator functions.