>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?
If we had a lot of users with DNT, maybe, from our tests when we enabled
that on EL this is not the case. Your team has already run experiments on
this functionality and they can speak as to the projection of numbers.

On Fri, Jan 19, 2018 at 3:05 AM, Adam Baso <[email protected]> wrote:

> 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 <[email protected]> wrote:
>
>> On Thu, Jan 18, 2018 at 9:57 PM, Adam Baso <[email protected]> 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.
>>
>> -Sam
>>
>> [0] https://phabricator.wikimedia.org/diffusion/EEVL/browse/
>> master/modules/ext.eventLogging.core.js;4480f7e27140fcb8ae91
>> 5c1755223fd7a5bab9b9$251
>> [1] https://phabricator.wikimedia.org/diffusion/EEVL/browse/mast
>> er/modules/ext.eventLogging.core.js;4480f7e27140fcb8ae915c
>> 1755223fd7a5bab9b9$215
>>
>>
>>
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