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From "luccioman (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IO-557) UnsupportedEncodingException when opening an ISO-8859-1 XML stream with Turkish as the default locale
Date Mon, 20 Nov 2017 21:10:00 GMT
luccioman created IO-557:
----------------------------

             Summary: UnsupportedEncodingException when opening an ISO-8859-1 XML stream with
Turkish as the default locale
                 Key: IO-557
                 URL: https://issues.apache.org/jira/browse/IO-557
             Project: Commons IO
          Issue Type: Bug
          Components: Streams/Writers
    Affects Versions: 2.6
         Environment: JVM running with argument -Duser.language=tr, or on an Operating System
with Turkish as its preferred language.
            Reporter: luccioman
            Priority: Minor


When the default locale is set to the Turkish language, using the XmlStreamReader constructor
on an XML stream with a prolog including the ISO-8859-1 charset name in lowercase as its encoding
throws a UnsupportedEncodingException (java.io.UnsupportedEncodingException: ─░SO-8859-1).
Example XML prolog : <?xml version="1.0" encoding="iso-8859-1"?>

This is apparently because the XmlStreamReader class uses String.toUpperCase() in its getXmlProlog()
function. It should rather toUpperCase(Locale.ROOT) or toUpperCase(Locale.US) as already done
in the getContentTypeEncoding() function. Otherwise the behaviour can be different depending
on the default locale, as the dotted lower case i becomes a dotted upper case i in the Turkish
language, which not the case with other languages.



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