Re: client streams?

On Wed, 2004-12-29 at 23:12 -0500, Nick Lewycky wrote:
> I'm having trouble understanding client streams in Squid. Am I correct
> in thinking that they are simply a chain of observers to the results of
> an HTTP request? And that they were recently added as part of the ESI work?

clientStreams are used to implement a pipe line for the data on the
client side of squid (the side that talks to the 'client' - not the side
that 'implements a client'). And yes, they were done as part of the ESI
work - started in C, finished in C++, which gives them their unique
flavour :).

> Could the present httpStart and friends in http.cc be written as client
> stream callbacks? Are there any plans to port http.cc over to the client
> stream API? If not, is there some fundamental reason not to that I've
> missed?

Yeah, thats the wrong side of the store. There will likely be a similar
concept introduced eventually, with appropriate code refactoring at that
time, but the current method signatures in the callbacks are completely
inappropriate to the server side of squid - where http.cc resides.

I'm going to upload a synopsis of the IRC chat we had to the wiki today,
so that there is some more reference material on clientStreams.

Rob

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