Thanks, Sam. Nuria, that's what I was getting at - if using the EL JS library would some sort of new method be needed so that these impressions arena't undercounted?

On Fri, Jan 19, 2018 at 4:49 AM, Sam Smith <> wrote:
On Thu, Jan 18, 2018 at 9:57 PM, Adam Baso <> wrote:
Adding to this, one thing to consider is DNT - is there a way to invoke EL so that such traffic is appropriately imputed or something?

The EventLogging client respects DNT [0]. When the user enables DNT, mw.eventLog.logEvent is a NOP.

I don't see any mention of DNT in the Varnish VCLs around the the /beacon endpoint or otherwise but it may be handled elsewhere. While it's unlikely, there's nothing stopping a client sending a well-formatted request to the /beacon/event endpoint directly [1], ignoring the user's choice.


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