Author: adrian.chadd
Date: Sun Jul 12 20:05:40 2009
New Revision: 14184
Added:
wiki/FeatureStoreUrlRewrite.wiki
Log:
Created wiki page through web user interface.
Added: wiki/FeatureStoreUrlRewrite.wiki
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+++ wiki/FeatureStoreUrlRewrite.wiki Sun Jul 12 20:05:40 2009
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+#summary Store URL rewriting - re-writing URLs to different cache keys to
unify cache content
+
+= Introduction =
+
+The Store URL rewriting feature is inherited from Squid-2.HEAD. It allows
the administrator to map >1 URL to a single URL used for cache key storage
and retrieval.
+
+For example, URLs which differ only on the hostname can be collapsed to
one host. Subsequent lookups for URLs which match a rule will map to the
same hostname regardless of which host was used to store the content with.
+
+Another use is to normalise dynamically generated content (eg, via GET
parameters) so the existance and/or order of the parameters can be
normalised.
+
+= Issues =
+
+There is currently no clear, documented way to PURGE an item which has
been stored using a rewritten key. This needs to be investigated, fixed and
documented (no issue yet.)
+
+Inter-cache communication using rewritten URLs is also not documented or
tested. This includes cache digests (no issue yet), ICP (Issue 43) and HTCP
(Issue 44.)
+
+Vary-aware content with rewritten store keys is not tested or documented.
Please be wary of enabling the store URL rewriter which match on Vary'ing
entities. (Issue 28.)
+
+There's apparently some weird stuff going on with redirected content and
rewritten store URLs. (Issue 27.)
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