Flask-hCaptcha

A hCaptcha extension for Flask based on flask-recaptcha.

Flask-hCaptcha 0.6.0 will be the last version that support Python 2, 3.5 and 3.6.

Install

pip install flask-hcaptcha

Usage

Implementation view.py

from flask import Flask
from flask_hcaptcha import hCaptcha

app = Flask(__name__)
hcaptcha = hCaptcha(app)

#or 

hcaptcha = hCaptcha()
hcaptcha.init_app(app)

In your template: {{ hcaptcha }}

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

It will insert the code automatically

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

    {{ hcaptcha }}

    [submit button]
</form>

Verify the captcha

In the view that's going to validate the captcha

from flask import Flask
from flask_hcaptcha import hCaptcha

app = Flask(__name__)
hcaptcha = hCaptcha(app)

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

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

API

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

hCaptcha.get_code(dark_theme=False)

Returns the HTML code to implement. But you can use {{ hcaptcha }} directly in your template. A dark theme can also be specified with dark_theme=True.

hCaptcha.verify()

Returns bool

In Template

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

Config

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

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

HCAPTCHA_SITE_KEY : Public key

HCAPTCHA_SECRET_KEY: Private key

HCAPTCHA_ENABLED = True
HCAPTCHA_SITE_KEY = ""
HCAPTCHA_SECRET_KEY = ""

Todo

1. Support Invisible Captcha
2. Support the use of Language Codes

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