[Varnish] #539: unable to compare two headers in vcl
Varnish
varnish-bugs at projects.linpro.no
Mon Aug 17 14:30:03 CEST 2009
#539: unable to compare two headers in vcl
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Reporter: hamnis | Owner: phk
Type: defect | Status: closed
Priority: normal | Milestone:
Component: varnishd | Version: trunk
Severity: critical | Resolution: fixed
Keywords: |
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Changes (by phk):
* status: new => closed
* resolution: => fixed
Comment:
The exact scenario you propose is unlikely to be possible, because
compiling regular expressions is horribly expensive (malloc overhead
amongst other things).
The other half of it, is that it is so suicidal to allow a client to send
you regexps that it defies description.
(In VCL we precompile the regular expressions at load-time to minimize
this overhead.)
In r4186 I have changed the VCL compiler so that the "==" and "!="
operators take general
strings as arguments, so replacing your "~" with "==" the above should now
be possible.
--
Ticket URL: <http://varnish.projects.linpro.no/ticket/539#comment:2>
Varnish <http://varnish.projects.linpro.no/>
The Varnish HTTP Accelerator
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