Get referring URL for Flask request

Question

When a user visits our site and signs up, how can I capture which website they came from?

Be it search, a PR website, etc. I don\'t care what page from our site they

Answer 1

request.referrer contains the URL the request came from, although it might not be sent by the client for various reasons.

The attribute takes its value from the Referer (not a typo!) header:

referrer = request.headers.get("Referer")

or, using the Flask shortcut:

referrer = request.referrer

See this tutorial for an example.