Varnish Cache Integration - Recently Viewed Products

-- HikaShop version -- : 2.6.4
-- Joomla version -- : 3.7.0

I'm working on integrating Varnish Cache, and researching options. I've seen the integration package from Massive Scale and looking at getting that, but also playing around with custom integration. Simply blocking cookies in Varnish seems to be effective for pages without user-specific content. I would like to find a way to load recently viewed products with JavaScript so the rest can come out of Varnish (which is all I need in this case). I'm wondering...

• Does the recently viewed products feature work off the Joomla session?
• Has there been any other work done in this area, apart from the package that Massive Scale offer?

Hi,

The recently viewed products are stored in $_SESSION and the session is only available while the Joomla user session is valid.
However, HikaShop doesn't go through the getUserState and setUserState functions of Joomla to set the recently viewed products data in the session. It directly set that in $_SESSION.
It is accessible with that variable on the server side:
I don't know of any alternative to the Massive Scale offer.

Thanks Nicolas, that's a great help.