[jira] [Commented] (TAP5-2324) Minified and un-minified assets are mixed up

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TAP5-2324?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14111461#comment-14111461 ] 

Howard M. Lewis Ship commented on TAP5-2324:
--------------------------------------------

I believe this can be fixed by doing the If-None-Match (ETag) check first, and the If-Modified-Since check second.

> Minified and un-minified assets are mixed up
> --------------------------------------------
>
>                 Key: TAP5-2324
>                 URL: https://issues.apache.org/jira/browse/TAP5-2324
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.4
>            Reporter: Jochen Kemnade
>              Labels: minification
>
> When an application is run with minification alternatingly enabled and disabled, it can happen that the browser uses a cached minified asset when minification is actually disabled.
> The problem is that both the minified and un-minified versions of an asset are served from the same URL with the same Last-Modified header.
> The cleanest solution would probably be to serve minified assets from a different URL, like we do for gzipped assets.
> If we don't want to do that, we could also check the Etag in addition to the If-Modified-Since header in the asset request. Currently, if the If-Modified-Since date is after the lastModified date, a 304 is sent regardless of whether the Etags match. However that would mean that the browser could never cache both the minified and the unminified versions of the asset.



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