ToPubSub is a function meant to break down the request sent to us and take that information and send to Google Analytics (or more accurately, send it to curt-consumer which sends it to analytics for us).

Header A key-value store for structuring header information.

Metrics Holds relevant information that will help report out request analytics.

RequestMetrics Holds data surrounding the incoming request.

ResponseMetrics Holds data surround the outgoing response.