The Working Google ReCaptcha implementation for Flask without Flask-WTF.

Can also be used as standalone

pip install Flask-GoogleReCaptcha

# or

pip install git+https://github.com/AndersonFirmino/flask-google-recaptcha.git

If you are using pipenv
pipenv install Flask-GoogleReCaptcha

This implementation is pure and has no dependencies from third parties. Works in both Python2 and Python3. You can use it in any flask project.

Has Google App Engine (GAE) support!

from flask import Flask
from flask_google_recaptcha import GoogleReCaptcha

app = Flask(__name__)
recaptcha = GoogleReCaptcha(app=app)

# or

recaptcha = GoogleReCaptcha()
recaptcha.init_app(app)

Inside of the form you want to protect, include the tag: {{ recaptcha }}

It will insert the code automatically

<form method="post" action="/submit">
    ... your field
    ... your field

    {{ recaptcha }}

    [submit button]
</form>

In the view that's going to validate the captcha

from flask import Flask
from flask_google_recaptcha import GoogleReCaptcha

app = Flask(__name__)
recaptcha = GoogleReCaptcha(app=app)

@route("/submit", methods=["POST"])
def submit():

    if recaptcha.verify():
        # SUCCESS
        pass
    else:
        # FAILED
        pass

Remember to set SITE_KEY and SECRET_KEY if not it does not appear!

reCaptcha.init(app, site_key, secret_key, is_enabled=True)

reCaptcha.get_code()

Returns the HTML code to implement. But you can use {{ recaptcha }} directly in your template

reCaptcha.verfiy()

Returns bool

Just include {{ recaptcha }} wherever you want to show the recaptcha

Flask-ReCaptcha is configured through the standard Flask config API. These are the available options:

RECAPTCHA_ENABLED: Bool - True by default, when False it will bypass validation

RECAPTCHA_SITE_KEY : Public key

RECAPTCHA_SECRET_KEY: Private key

The following are Optional arguments.

RECAPTCHA_THEME: String - Theme can be 'light'(default) or 'dark'

RECAPTCHA_TYPE: String - Type of recaptcha can be 'image'(default) or 'audio'

RECAPTCHA_SIZE: String - Size of the image can be 'normal'(default) or 'compact'

RECAPTCHA_TABINDEX: Int - Tabindex of the widget can be used, if the page uses tabidex, to make navigation easier. Defaults to 0

RECAPTCHA_ENABLED = True
RECAPTCHA_SITE_KEY = ""
RECAPTCHA_SECRET_KEY = ""
RECAPTCHA_THEME = "dark"
RECAPTCHA_TYPE = "image"
RECAPTCHA_SIZE = "compact"
RECAPTCHA_RTABINDEX = 10

Anderson Araujo (coderpy) 🐍