Re: When exactly is the locale changed when using the lang parameter?

by Jean-Noël Rivasseau-3 :: Rate this Message:

Done,

http://jira.codehaus.org/browse/GRAILS-2951

I've looked at the Spring docs to understand how this worked, and
until the JIRA is fixed I came with a simple workaround in a filter
applying to all controllers:

if (params["lang"])
{
def localeResolver =
RequestContextUtils.getLocaleResolver(request);
def locale = new Locale(params["lang"]);

localeResolver.setLocale(request, response, locale);
}

Can you confirm, Graeme, that the LocaleResolver implementation used
by Grails is the SessionLocaleResolver? (not very clear from the
docs).

Also, while I was playing with the URL mappings I was wondering a few things:

In particular, does the constraints allow the URL mapper resolver to
discriminate on a optional parameter?

Eg, for the mapping:

"/$lang?/$controller/$action?"
{
constraints
{
lang(matches:/[a-z]{2}/)
}
}

will the code checks if I have a 2 letter string after the first
slash, in that case fill the $lang parameter, and in the other case
assume the $lang parameter is not present? I am not sure if such
advanced conditional mappings currently work with Grails.

Thanks

Jean-Noel

On Wed, May 14, 2008 at 11:22 PM, Graeme Rocher <graeme@...> wrote:

> The lang switching relies on the Spring infrastructure and doesn't
> read the Grails params object, but really it should. Please raise a
> feature request in jIRA
>
> Cheers
>
> On Wed, May 14, 2008 at 10:08 PM, Jean-Noël Rivasseau <elvanor@...> wrote:
>> Hello, on my web-application I would like to setup a custom URL
>> mapping that contains the locale to be used in the URL. Eg,
>> www.example.com/en/, www.example.com/fr for French, etc.
>>
>> That way the URL contains the locale information which is nice for
>> bookmarking etc.
>>
>> I made up the following URL mapping:
>>
>> "/$lang?/about"
>> {
>>
>> controller= "main"
>> constraints
>> {
>> lang(matches:/[a-z]{2}/)
>> }
>> action = "about"
>>
>> }
>>
>> Unfortunately, it is not working, the locale is not changed (on
>> www.example.com/fr/about/ ). If I manually specify the ?lang parameter
>> at the end of the URL it works though. This had led me to believe that
>> the "locale switching", based on the lang parameter, is maybe ran
>> before the URL mapping, or it does not use the lang parameter as set
>> by the URL mapping code in params.
>>
>> How should I proceed then to achieve what I want? In a Filter maybe?
>>
>> On a sidenote, the Grails guide says that forcing the locale via the
>> lang parameter sets up a cookie that remembers the choice. I sniffed
>> requests with Firebug and found no trace of such a cookie, so I guess
>> it is stored within the session? Can someone confirm?
>>
>> As I will be essentially forcing the lang parameter every time with my
>> approach, I hope that the locale switching code is not heavy - does
>> someone know about this?
>>
>> Thanks
>>
>> Jean-Noel
>>
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>>
>
>
>
> --
> Graeme Rocher
> Grails Project Lead
> G2One, Inc. Chief Technology Officer
> http://www.g2one.com
>
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