On 21/05/2014 3:43 a.m., Tom Holder wrote: > Hi all, > > I've setup squid to proxy everything to a single server I have. > > Based on a header, I might want to serve a different version of a file > for example for: > > X-MY-HEADER: 1 > URL: /css/style.css > > Would not be the same as: > > X-MY-HEADER: 2 > URL: /css/style.css > > Ideally though I'd like to be able to cache both. > > Can I get squid to somehow differentiate based on an incoming header? > > Failing that, I'm generating an etag on the server that's a hash of > the content. Will this be enough to distinguish between the different > files? Not by itself. ETag is used to confirm correct variant is being revalidated or fetched once one is chosen. You need the server to emit "Vary: X-MY-HEADER" on all responses to enable Squid to perform the initial selection. Between them Vary, ETag and Last-Modified permit Squid to target a specific object variant inside the set of possible responses to any dynamic resource URL. Amos
