Mapping VCL variables to internal variables

Poul-Henning Kamp phk at
Thu May 22 22:25:34 CEST 2008

In message <20080521185714.GC6756 at>, Charles Curley writes:

>I'd like to set a variable in VCL, and then use it in a modification
>of Varnish. Having added to req.hash with something like:
>sub vcl_hash
>if (req.http.Accept-Encoding ~ "gzip") {
>set req.hash +=3D "gzip";
>} else if (req.http.Accept-Encoding ~ "deflate") {
>set req.hash +=3D "deflate";
>where do I find that in Varnish itself?

See cache_center.c::cnt_lookup() [search for "VCL_hash_method(sp);"],
and cache_hash.c::HSH_Copy(), HSH_Compare() and HSH_Lookup().

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

More information about the varnish-dev mailing list