Question

i heard that , if your asp.net page is inside a iframe, and u want to get the parent url, you can achieve this by using the referrer?

i tested is okay, and found that the window parent url will included in the referrer when called the iframe content

Request.UrlReferrer.ToString();

Assume that i can only use server side to achieve

I just want to ask is that way safe?

Any chance to lost the referrer url in this case

Answer 1

1. The browser is not guaranteed to send the referer. It’s all up to the browser/configuration/extensions/proxies and whatnot between the request and your server.
2. If the user navigates to a different page within the iframe, the referer will point to whatever the user came from.

All in all, never use the referer for any logic that may fail if it’s not there or if it has an unexpected value.