{language} sitemap parameters

[Kjetil Kjernsmo <Kj...@computas.com>]

All,

I've been using LocaleAction for a while, but it hasn't worked very well, and 
now I needed to resolve some bugs in the application in the language 
handling. Basically, all I want to do is turn off the feature that looks in 
the Accept-Language header (since it doesn't do a full language negotiation 
process as specified in HTTP) and set the default locale to Norwegian 
language. This should be trivially configureable, but I have never gotten it 
working, so eventually, I had to realise that I simply don't understand how 
LocaleAction works. 

So, I started to read the code, and I forked it to add more debug information 
and to hardcode our desired locale whenever possible. What I found was that 
the configuration method of the code does run OK and all the correct 
parameters are set. 

In my sitemap, which can be found at 
https://submarine.computas.com/sublima/trunk/blocks/sublima-app/src/main/resources/COB-INF/sitemap.xmap
I have sections like 

      <map:match pattern="resource/*.*">
        <map:act type="locale">
          <map:call function="com.computas.sublima.app.fascade.SearchFascade">
            <map:parameter name="mode" value="resource"/>
            <map:parameter name="name" value="{../1}"/>
            <map:parameter name="format" value="{../2}"/>
            <map:parameter name="interface-language" value="{language}"/>
          </map:call>
        </map:act>
      </map:match>

So, I set the interface-language parameter to {language}. So the critical 
issue here is how {language} is set. LocaleAction seems to be the right way 
to do this.

With my slightly modified LocaleAction this is what I see in my logs when it 
is enabled:

http-8180-Processor25 DEBUG action.LocaleAction - will set values in request
http-8180-Processor25 DEBUG action.LocaleAction - won't create session
http-8180-Processor25 DEBUG action.LocaleAction - won't set values in session
http-8180-Processor25 DEBUG action.LocaleAction - won't set values in cookies
http-8180-Processor25 DEBUG action.LocaleAction - Locale attribute name is 
locale
http-8180-Processor25 DEBUG action.LocaleAction - won't use request locale
http-8180-Processor25 DEBUG action.LocaleAction - default locale no_NO
http-8180-Processor25 TRACE controller.SearchController - SearchController: 
Language from sitemap is en

So, everything looks fine up to the final line. The final line stems from the 
controller, which uses the interface-language parameter. I have confirmed 
that this language is set to the Accept-Languages header, regardless of the 
default locale and regardless of that I have explicitly disabled it.

Furthermore, the interesting thing is what is not in the logs: There's nothing 
from the act method, so it appears that act is actually never run. 

However, if I send a locale query parameter, things look much better, e.g. if 
I send ?locale=sv,  I get:

http-8180-Processor25 DEBUG action.LocaleAction - won't use request locale
http-8180-Processor25 DEBUG action.LocaleAction - default locale no_NO
http-8180-Processor25 TRACE controller.SearchController - SearchController: 
Language from sitemap is sv

i.e. it works as intended. 

So, the problem is only that the Accept-Languages header override the default 
even if disabled, it works nicely if a query parameter is used.

Now, I did another interesting exercise: I commented out the LocaleAction 
matcher.

The log now confirms that LocaleAction is not run at all. To my great 
surprise, it has exactly the same behaviour as before. I.e. query params 
work, but the Accept-Languages header is still what is used. 

I haven't seen this behaviour documented anywhere. I thought that LocaleAction 
was required to even use the {languages} variable, but now it appears that 
there is something in Cocoon core that does this. 

So, is there any way I can disable Accept-Languages and hard-code a default 
that is used whenever a locale query parameter is not given?



Kind regards 

Kjetil Kjernsmo
-- 
Senior Knowledge Engineer
Mobile: +47 986 48 234
Email: kjetil.kjernsmo@computas.com   
Web: http://www.computas.com/

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