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"""

Recaptcha is a free captcha service offered by Google in order to secure websites and

forms. At https://www.google.com/recaptcha/admin/create you can create new recaptcha

keys and see the keys that your have already created.

* Keep in mind that recaptcha doesn't work with localhost

When you create a recaptcha key, your will get two separate keys: ClientKey & SecretKey.

ClientKey should be kept in your site's front end

SecretKey should be kept in your site's back end

# An example HTML login form with recaptcha tag is shown below

{% csrf_token %}

</div>

</div>

</div>

</form>

Below a Django function for the views.py file contains a login form for demonstrating

recaptcha verification.

"""

import requests

try:

from django.contrib.auth import authenticate, login

from django.shortcuts import redirect, render

except ImportError:

authenticate = login = render = redirect = print

def login_using_recaptcha(request):

# Enter your recaptcha secret key here

secret_key = "secretKey"

url = "https://www.google.com/recaptcha/api/siteverify"

# when method is not POST, direct user to login page

if request.method != "POST":

return render(request, "login.html")

# from the frontend, get username, password, and client_key

username = request.POST.get("username")

password = request.POST.get("password")

client_key = request.POST.get("g-recaptcha-response")

# post recaptcha response to Google's recaptcha api

response = requests.post(url, data={"secret": secret_key, "response": client_key})

# if the recaptcha api verified our keys

if response.json().get("success", False):

# authenticate the user

user_in_database = authenticate(request, username=username, password=password)

if user_in_database:

return redirect("/your-webpage")

return render(request, "login.html")

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