https://issues.apache.org/bugzilla/show_bug.cgi?id=49533
Summary: mod_cache: Cache-Control: no-cache and no-store must
ignore cached entity
Product: Apache httpd-2
Version: 2.3-HEAD
Platform: PC
OS/Version: Mac OS X 10.5
Status: NEW
Severity: normal
Priority: P2
Component: mod_cache
AssignedTo: [email protected]
ReportedBy: [email protected]
When an entity is already cached, and a client sends a request with the
Cache-Control: no-cache or no-store header, mod_cache attempts to revalidate
the cached content instead of fetching the content from scratch.
This violates RFC2616 14.9.4 Cache Revalidation and Reload Controls:
End-to-end reload
The request includes a "no-cache" cache-control directive or, for
compatibility with HTTP/1.0 clients, "Pragma: no-cache". Field names MUST NOT
be included with the no-cache directive in a request. The server MUST NOT use a
cached copy when responding to such a request.
RFC2616 doesn't explicitly state what needs to happen to an existing cached
entry when a no-store is received from a client, however in order to honour the
client's wishes, a no-store should result in a from scratch request, as opposed
to a revalidation of and possible serving of stored content.
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