Rafa created WW-5549:
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Summary: i18n interceptor param supportedLocale (when set)
disables request_locale param functionality
Key: WW-5549
URL: https://issues.apache.org/jira/browse/WW-5549
Project: Struts 2
Issue Type: Bug
Components: Core Interceptors
Affects Versions: 6.3.0
Reporter: Rafa
It seems that when {{supportedLocale}} parameter is set on {{i18n}} interceptor
- language change using {{request_locale}} param is not possible anymore if
current browser {{Accept-Language}} matches the {{supportedLocale}} value.
I set {{supportedLocale}} parameter on the {{i18n}} interceptor (e.g. to
{{fr,en}} value). Now i enter the webapp (using a browser with fr language set
as default) and the struts locale is set to {{fr}} (as expected - ok).
Now i try switching the locale to {{en}} using the {{?request_locale=en}}
built-in feature - but this does not work ({{{}fr{}}} is still set as language).
If i do not set the {{supportedLocale}} param on the {{i18n}} interceptor -
everything works fine (for exactly the same webapp, and the {{request_locale}}
request param switch is working fine) but then i loose the feature of {_}struts
preselecting fr language as default for browsers with fr language set as
default{_}.
When i look into the source code of
[I18nInterceptor.java|https://github.com/apache/struts/blob/main/core/src/main/java/org/apache/struts2/interceptor/I18nInterceptor.java#L302]
(line 302) it looks like {{AcceptLanguageLocaleHandler.find()}} is always
returning one of the {{supportedLocale}} locales if browser has matching
{{Accept-Language}} header - but it shall not e.g. when {{request_locale}}
param is set (it shall take precedence here).
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