luccioman created IO-557:
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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: İSO-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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