https://bz.apache.org/bugzilla/show_bug.cgi?id=63143
Bug ID: 63143
Summary: Respect client's browser preference for English
language (can be fixed by providing empty
LocalStrings_en.properties files)
Product: Tomcat 9
Version: 9.0.14
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Manager
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: -----
The manager web application does not select English language according to
user's preferences in some configurations, unless you create an empty
LocalStrings_en.properties" file to enable English locale.
It is an issue with bundle selection in
org.apache.tomcat.util.res.StringManager.getManager(String,
Enumeration<Locale>).
Steps to reproduce:
Using Tomcat 9.0.15 (trunk), Java 8, Mozilla Firefox.
1. Run JVM with an OS of a language that Tomcat has a translation available.
My OS uses Russian language.
2. Configure a browser, to send "en" as the preferred language.
E.g., I configure the browser with the following list of languages:
en
en-us
ru-ru
ru
3. Start Tomcat, start the browser and access the Manager web application.
Expected: I expect the UI to be in English language.
Actual: The UI is in Russian language.
WORKAROUND:
If I create an empty LocalStrings_en.properties file in
${catalina.home}/lib/**, I get the expected result: the UI is in English
language. Path to the file:
${catalina.home}/lib/org/apache/catalina/manager/LocalStrings_en.properties
GUESS:
Looking into StringManager class constructor, when it gets a bundle that has
Locale.ROOT it interprets it as Locale.ENGLISH. It is OK.
If I remember correctly, in this case Java actually falls back to the system
default locale. That is: when you request a resource in English locale (that
does not exist), Java returns a resource in the system default locale (Russian
in my case) and not the ROOT locale one.
It would be better to fix this in StringManager, instead of having to maintain
a lot of empty files.
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