custom css not loaded on first login attempt

[Manfredo Hopp]

Hi: 

Trying to install a custom login page I noticed this strange behaviour with an apache front-end of cas 4.0.1. 

Here is my Cas properties file:

src/main/resources/cas-theme-default.properties: 

#standard.custom.css.file=/css/cas.css

standard.custom.css.file=/css/mydomain.css

cas.javascript.file=/js/cas.js

This new css is loaded only with a refresh of the browser.

Is there any issue regarding this behaviour?

Thanks!

Manfredo

[Tom Poage]

Don’t recall seeing cache-control in CAS itself (doesn’t mean it’s not there). We've been doing the following in httpd:

  <LocationMatch "\.(css|gif|jpg|png|js)$">

    <IfModule mod_expires.c>

      ExpiresActive On

      ExpiresByType text/css "access plus 1 hour"

      ExpiresByType image/gif "access plus 1 hour"

      ExpiresByType image/jpeg "access plus 1 hour"

      ExpiresByType image/png "access plus 1 hour"

      ExpiresByType text/javascript "access plus 1 hour"

      ExpiresByType application/javascript "access plus 1 hour"

    </IfModule>

  </LocationMatch>

Tom.

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[Pascal Rigaux]

Hi,

When apache or tomcat serves static files, they add "Last-Modified" but no Expires nor Cache-Control.
In that cas browsers are using heuristics to know how long the file must be cached.
( http://stackoverflow.com/questions/14345898/what-heuristics-do-browsers-use-to-cache-resources-not-explicitly-set-to-be-cach )

Workaround for apache >= 2.4 : globally add the following on all apaches:

Header setifempty Cache-Control "max-age=86400" "expr=-n resp('Last-Modified') && -z resp('Expires')"


Anyway, AFAIK best solution for CAS is to use themes and versionize theme name (cache busting).

cu

On 24/10/2016 23:00, Tom Poage wrote:
> Don’t recall seeing cache-control in CAS itself (doesn’t mean it’s not there). We've been doing the following in httpd:
>
> <LocationMatch"\.(css|gif|jpg|png|js)$">
> <IfModulemod_expires.c>
> ExpiresActiveOn
> ExpiresByTypetext/css "access plus 1 hour"
> ExpiresByTypeimage/gif "access plus 1 hour"
> ExpiresByTypeimage/jpeg "access plus 1 hour"
> ExpiresByTypeimage/png "access plus 1 hour"
> ExpiresByTypetext/javascript "access plus 1 hour"

> ExpiresByTypeapplication/javascript "access plus 1 hour"
> </IfModule>
> </LocationMatch>
>
>
> Tom.

[Manfredo Hopp]

Hi, 

thanks for the replies.

Unfortunately I couldnt apply setIfEmpty since we have apache 2.4.6 and this is a feature of 2.4.7. Sorry I didnt mention apache's version.

The other suggestion on apache throwed same result (css not loaded at first attempt)

My workaround was eliminate springs c:url tag since it didnt resolve right. 

Thank you Manfredo