Allowing Users to Check their Opt-out Status
OpenX provides a status check mechanism to allow your end users to check their opt-out status or determine if you have already tracked them with an ad server cookie. This NAI-style mechanism works through an image tag, which references a status check URL, and redirects the user to the appropriate status image, based on the presence of a user identification cookie and/or user opt-out cookie.
You may implement this mechanism within the NAI opt-out system (if you are an NAI member), by providing them with your status check URL and opt-out instructions or within your own site. For example, on your privacy page where you host your user opt-out mechanism.
When a user browses to the webpage where the status check mechanism is implemented, the user triggers the image tag which references the following status check URL:
<img src="http://d.example.com/privacy/status/nai" />
d.example.com is the hostname of your OpenX delivery server. OpenX detects the presence of the user identification cookie and the user opt-out cookie, and then redirects the user to the appropriate NAI status image, as follows:
No cookies: If OpenX detects neither cookie, then it redirects the user to:
User identification cookie: If OpenX detects the user identification cookie only, then it redirects the user to:
User opt-out cookie: If OpenX detects the user opt-out cookie only, then it redirects the user to:
Both cookies: If OpenX detects both the user identification cookie and the user opt-out cookie, then it redirects the user to: