Cache API responses, both on Varnish and in the user's browser.
The imageinfo request is not cached, since that would make it very
hard to test metadata template edits. Everything else is cached for
one day.
Change-Id: I9149cf40d4448a424073eefd1eb442c70c977687
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/435
Make sure it is easy to debug when one of the promises rejects (and
causes the whole promise chain to fail).
I'm not really happy with this, but still seemed better than adding
the same boilerplate error logging code to each provider one-by-one.
Change-Id: Idd2b638f012ef2ff250e350e2f6a60bb8b81899b
Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/268
* more robust method of obtaining URL
* decouple performance logging from providers (mostly)
* ignore fake XHR object which jQuery returns for JSONP requests
* guard for CORS requests - apparently Chrome refuses to return
certain information even with an Allow-Origin: * response header.
* Resource Timing is limited to 150 results, which causes fake
misses in debug mode. There is an API to increase the limit
but it is not implemented in Chrome. I am calling it nevertheless,
maybe IE understands it (it is present in the MSDN docs at least).
This seems to work for AJAX, CORS, JSONP, image AJAX; CORS requests
return 0 for a lot of values, per spec a Timing-Allow-Origin: *
header might help that.
Change-Id: I8353858022f51a7e70774e65513d0fa2554a5064
