From: Tollef Fog Heen <tfheen@err.no>
Date: Sun, 16 Nov 2008 16:41:52 +0000 (+0100)
Subject: Thoughts about filtering
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73b5ca9ac40441bdae0ff10dcd22c772455b6e3e;p=varnish

Thoughts about filtering
---

diff --git a/varnish-cache/lib/libvarnishapi/filter.txt b/varnish-cache/lib/libvarnishapi/filter.txt
new file mode 100644
index 00000000..1847fc70
--- /dev/null
+++ b/varnish-cache/lib/libvarnishapi/filter.txt
@@ -0,0 +1,30 @@
+# Preliminary spec for varnish filtering language
+
+## What is interesting to select on?
+
+### Operators
+
+ =,<,>,<=,>= - Normal meaning for numbers
+ = - equality for strings
+ ~ - regex match (insensitive) for strings
+
+### Boolean logic (and, or, grouping?)
+
+ No grouping
+ Explicit and/or
+
+### host (both client and backend, DNS and ip/network)
+
+ "(host|backend|client) (operator) (IP/DNS)"
+
+### return code (please give me all 404s)
+
+ "(status|rxstatus|txstatus) (operator) (number)"
+
+### arbitrary http headers (from both backend and client)
+
+ "http.(headername) (operator) (string match)"
+
+### time to process request
+
+ "processingtime (operator) (timeunit)"