Opened 12 years ago

Closed 12 years ago

#4943 closed (fixed)

Cache middleware description

Reported by: anonymous Owned by: nobody
Component: Documentation Version: master
Severity: Keywords:
Cc: Triage Stage: Ready for checkin
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no


Original text:

If you use CacheMiddleware, it’s important to put it in the right place within the MIDDLEWARE_CLASSES setting, because the cache middleware needs to know which headers by which to vary the cache storage. Middleware always adds something to the Vary response header when it can.

Put the CacheMiddleware after any middlewares that might add something to the Vary header. The following middlewares do so:
SessionMiddleware adds Cookie
GZipMiddleware adds Accept-Encoding

First, the list lacks LocaleMiddleware as it adds vary Accept-Language.
Second, the responce is handled by middleware in reverse order, hence CacheMiddle must be placed BEFORE any middleware that change vary header.

Attachments (1)

4943.patch (1.1 KB) - added by Chris Beaven 12 years ago.

Download all attachments as: .zip

Change History (3)

Changed 12 years ago by Chris Beaven

Attachment: 4943.patch added

comment:1 Changed 12 years ago by Chris Beaven

Triage Stage: UnreviewedReady for checkin

comment:2 Changed 12 years ago by Malcolm Tredinnick

Resolution: fixed
Status: newclosed

Fixed in [6575], although I typed the wrong ticket number in the commit message.

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