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From "Tellier Benoit (JIRA)" <mime4j-...@james.apache.org>
Subject [jira] [Resolved] (MIME4J-263) DecoderUtil.decodeEncodedWords() doesn't decode an encoded empty string
Date Tue, 22 May 2018 09:04:00 GMT

     [ https://issues.apache.org/jira/browse/MIME4J-263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tellier Benoit resolved MIME4J-263.
-----------------------------------
    Resolution: Fixed

https://github.com/apache/james-mime4j/pull/15 fixed the issue. Thanks for the contribution.

> DecoderUtil.decodeEncodedWords() doesn't decode an encoded empty string
> -----------------------------------------------------------------------
>
>                 Key: MIME4J-263
>                 URL: https://issues.apache.org/jira/browse/MIME4J-263
>             Project: James Mime4j
>          Issue Type: Bug
>          Components: parser (core)
>            Reporter: Artur Jablonski
>            Priority: Minor
>
> {{DecoderUtil.decodeEncodedWords()}} returns an unencoded string if the word to decode
is empty.
> For example
> {{DecoderUtil.decodeEncodedWords("=?utf-8?Q??=", DecodeMonitor.SILENT)}}
> returns
> {{"=?utf-8?Q??="}}
> instead of empty string (or perhaps null)
> The problem lies in the regexp that is used behind the scenes that requires at least
one character:
> {code}
> private static final Pattern PATTERN_ENCODED_WORD = Pattern.compile(
>             "(.*?)=\\?(.+?)\\?(\\w)\\?(.+?)\\?=", Pattern.DOTALL);
> {code}



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