2025212 - Try to add telemetry for Akamai WAF blocks

Status: NEW

(Core :: Networking, enhancement, P2)

Description

[Emilio Cobos Álvarez [:emilio]]

It seems the WAF blocks should be somewhat easily detectable. The general pattern would be something matching a 403 error and checking if the response data contains https://errors.edgesuite.net/18 or so?

The idea would be to detect that information, and set a use counter when that happens. From main-thread loads I think we can get to the relevant document / global and end up calling Document::SetUseCounter. I'm a bit less sure of what the deal is from things like workers / how can we get our hands in the relevant WorkerPrivate. Probably just calling SetUseCounter on the relevant worker thread would be enough.

Comment 1

[Tom Schuster]

This sounds a bit similar to the work we did on tracking the number of Captcha pages in bug 1913421.