22697 - Data from bug reports are cached, probably shouldn't be

Status: VERIFIED WONTFIX

(Bugzilla :: Bugzilla-General, defect, P3)

Description

[A. Karl Kornel]

When the bug reports are shown, the contents are cached on the browser's local
drive.  That means that, if you're coming back after just making a change or
uploading a file, the changes aren't shown, possibly leading to a mid-air
collision.

It is also possible that some caching proxies and other network devices that use
caches could also cause problems.

Obviously, reloading fixes the problem, but some people would not think of that.

If the server uses HTTP/1.0, adding one or both of the following (a MIME header
and one META tag, respectively) should clear this up:
Pragma: no-cache
<META HTTP-EQUIV="Pragma" CONTENT="no-cache">

If the server uses HTTP/1.1, adding the header below (and, optionally, the META
tag below) can also work.  When the header and tag below are used with the
header and tag above (for HTTP/1.0), that should take care of everything.  The
HTTP/1.1-approved header/tag is:
Cache-control: no-cache
<META HTTP-EQUIV="Cache-Control" CONTENT="no

Comment 1

[Sean Richardson]

Changing Product to "Webtools"; and Component to "Bugzilla".

The problem described is not academic, but perhaps it is not necessary to
disable caching altogether; a two-minute timeout would give enough time
to skip back and forth between links to other bug reports without hitting
the server every time, while still avoiding most mid-airs.

Comment 2

[Mitchell Baker]

Reassigning to dmose, default owner for webtools component

Comment 3

[Dan Mosedale (:dmosedale, :dmose)]

Reassigning to terry, as bugzilla is his baby.

Comment 4

[Terry Weissman]

I think this is a bad idea.  Queries take significant overhead to run.  I think
people would rather things be fast than 100% accurate.

Comment 5

[Dave Miller [:justdave]]

per Terry, auto-verifying any resolved bug that hasn't been touched since before 
2.10 was released.

Comment 6

[Dave Miller [:justdave]]

moving to Bugzilla product
reassign to default owner/qa for INVALID/WONTFIX/WORKSFORME/DUPLICATE