[ http://issues.apache.org/struts/browse/WW-1573?page=all ]
Dariusz Wojtas updated WW-1573:
-------------------------------
Attachment: FilterDispatcher_patch.patch
> Handling of If-Modified-Since header for static content
> -------------------------------------------------------
>
> Key: WW-1573
> URL: http://issues.apache.org/struts/browse/WW-1573
> Project: Struts 2
> Issue Type: Improvement
> Components: Dispatch
> Affects Versions: 2.0.1
> Reporter: Dariusz Wojtas
> Attachments: FilterDispatcher_patch.patch
>
>
> The issue described here was first described in WW-1536, but I think it is
> something more 'standalone' and not only 'tabbed panel' specific.
> The problem is that Struts2 currently does not behave correctly on requests
> of type 'If-Modified-Since' for static content.
> I am using firefox 1.5 and 2.0 and when reloading pages with ajax scripts,
> the browser usually asks for the content again, but it also uses
> 'If-Modified-Since' header.
> Struts dispatcher ignores this header and sends the full content again.
> But these are often static scripts/images of size 100kB-500kB in total.
> I am trying to 'split' the WW-1536 issue as I was the originator of the
> problem description on the mailing list.
> I am attaching a patch (a bit improved version from the one in WW-1536) which
> works for me for about 3 weeks perfectly - using trung from struts2.
> I have examined the headers/content exchanged between server and browser and
> it is really worth it.
> It only changes single method in the FilterDispatcher, enables
> If-Modified-Since and fixes 2 other issues:
> a) no more thread-unsafe formatter instances (class level formatter)
> b) no more playing with GMT and other timezones - there were issues with
> calculations seen during debug and interaction with the browser
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