Take the 2-minute tour ×
Server Fault is a question and answer site for professional system and network administrators. It's 100% free, no registration required.

I need to get mod_cache_disk to cache a site containing query strings. The issue is that it's a vendor product on IIS that we're trying to cache through mod_proxy and it does not contain expires headers. I realize this issue violates several RFCs and that's why apache does not do it by default.

Is there a way to force apache 2.4.x to cache with query string and no expires header?

This configuration will cache, but of course without honoring ? it caches the wrong content for most items.

CacheEnable disk https://
CacheEnable disk /
CacheRoot /var/cache/mod_proxy/
CacheDirLevels 4
CacheDirLength 5
CacheIgnoreCacheControl On
CacheIgnoreNoLastMod On
CacheIgnoreHeaders None
CacheMaxFileSize 100000000
CacheMinFileSize 1
CacheMaxExpire 1209600
CacheDefaultExpire 3600
CacheIgnoreQueryString On
CacheStoreNoStore On
CacheStorePrivate On

If I change CacheIgnoreQueryString to Off it will start emitting errors about the expires header.

AH00768: cache: /view.image?Id=1114 not cached. Reason: Query string present but no explicit expiration time,

share|improve this question

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.