emotionLoop/visualCaptcha-django

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from django.shortcuts import render_to_response, redirect

from rest_framework.renderers import JSONRenderer

from visualcaptcha import Captcha, Session


def index(request):
    return render_to_response('index.html')


def start(request, howMany):
    visualCaptcha = Captcha(Session(request.session))

    visualCaptcha.generate(howMany)
    jsonFrontendData = JSONRenderer().render(visualCaptcha.getFrontendData())
    response = HttpResponse(content=jsonFrontendData)
    response['Access-Control-Allow-Origin'] = '*'

    return response


def getImage(request, index):
    visualCaptcha = Captcha(Session(request.session))

    headers = {}
    result = visualCaptcha.streamImage(
        headers, index, request.GET.get('retina'))

    if result is False:
        return HttpResponse(result, headers, 404)

    return HttpResponse(result, headers)


def getAudio(request, audioType='mp3'):
    visualCaptcha = Captcha(Session(request.session))

    headers = {}
    result = visualCaptcha.streamAudio(headers, audioType)

    if result is False:
        return HttpResponse(result, headers, 404)

    return HttpResponse(result, headers)


@csrf_exempt
def trySubmission(request):
    visualCaptcha = Captcha(Session(request.session))

    frontendData = visualCaptcha.getFrontendData()

    # If an image field name was submitted, try to validate it
    if request.POST.get(frontendData['imageFieldName'], None) is not None:
        if visualCaptcha.validateImage(
                request.POST[frontendData['imageFieldName']]):
            response = HttpResponse(status=200)
            return redirect('/?status=validImage')
        else:
            response = HttpResponse(status=403)
            return redirect('/?status=failedImage')
    elif request.POST.get(frontendData['audioFieldName'], None) is not None:
        # We set lowercase to allow case-insensitivity , but it's
        # actually optional
        if visualCaptcha.validateAudio(
                request.POST[frontendData['audioFieldName']].lower()):
            response = HttpResponse(status=200)
            return redirect('/?status=validAudio')
        else:
            response = HttpResponse(status=403)
            return redirect('/?status=failedAudio')
    else:
        response = HttpResponse(status=500)
        return redirect('/?status=failedPost')

    return response