James Quacinella <[EMAIL PROTECTED]> writes: > I was contemplating a setup such as this: > > 1) Client requests xml file from varnish cache > 2) If it exists, fine; else check backend file server running lighttpd > 3) If it exists on the backend, again no problem; however, if it > doesn't exist on the lighttpd backend, I need varnish to check another > (dynamic) backend, which will dynamically generate it and save it on > the lightttpd backend for future purposes. > > Does anyone have any ideas on how to implement that via VCL? I would > imagine I would need to be able to see the response headers from the > original backend, to see if a 404 is generated (like here > http://varnish.projects.linpro.no/ticket/88).
I don't think this is supported in the current code base. Poul-Henning and I discussed something similar on Monday - the ability to restart a request, possibly after modifying it a little. There was also some talk at some point of adding some kind of "policy check" functionality - the ability to perform a secondary HTTP request from VCL code, e.g. to check a user's credentials before serving a cached document which requires authorization, rather than just passing the entire request on to the backend. Mind you, these are just ideas - we have no concrete plans to implement any of this in the near future. We are currently ramping up work on 2.0, and will most likely be busy with that until fall. DES -- Dag-Erling Smørgrav Senior Software Developer Linpro AS - www.linpro.no _______________________________________________ varnish-misc mailing list varnish-misc@projects.linpro.no http://projects.linpro.no/mailman/listinfo/varnish-misc