Make Tagging an explicit responsiblity of the ProxyClient / next release?

[dantleech]

Actually we use the Ban capability of a proxy server to invalidate tags - in the tag manager we send a regex to the proxy client for banning.

This causes problems for a proxy client which does not support ban, but does support tag invalidation as it should actually be passed a discrete list of tags, not a regex.

I suggest introducing a TagInterface in addition to BanInterface. The Varnish proxy client would then implement theTagInterface and subsequently perform the required BAN. Whereas another implementation (e.g. Symfony HTTP cache) can explicitly handle the tag invalidation.

This seems to be addressed in master -- do we know when the next release will be? Is anything standing in the way?

[dbu]

the main roadblock for the release was that we wanted to base the client on Httplug instead of tying us to a specific version of guzzle or other HTTP client. which got me sidetracked into Httplug rather deeply :-)

this now out of the way, i think we should be able to wrap up. the discussion around tagging with magnus and #253 is now the only major blocker.