Cloudflare proxy support for flask application.

It gets client ip from cloudflare headers and can allow request from cloudflare ips only. If you are behind a proxy remember to use werkzeug.middleware.proxy_fix.ProxyFix, alternative you can override CloudflareRemote.get_remote() in order to fetch the correct client ip for example via HTTP_X_FORWARDED_FOR.

Install flask_cloudflare_remote using pip:

$ pip install Flask-CloudflareRemote

import flask
from flask_cloudflare_remote import CloudflareRemote


app = Flask(__name__)
cf = CloudflareRemote()
cf.init_app(app)

1. CF_DOMAIN: (default: 'www.cloudflare.com')
2. CF_REQ_TIMEOUT: (default: 10)
3. CF_IPs: (default: None) list of allowed cloudflare ips
4. CF_IP4_URI: (default: '/ips-v4') ipv4 list uri
5. CF_IP6_URI: (default: '/ips-v6') ipv6 list uri
6. CF_IPv6_ENABLED: (default: False) enable ipv6
7. CF_STRICT_ACCESS: (default: True) return forbidden if remote ip is not in allowed list
8. CF_OVERRIDE_REMOTE: (default: True) override flask REMOTE_ADDR from request
9. CF_HDR_CLIENT_IP: (default: 'CF-Connecting-IP') header key used for client ip

License MIT