[jira] Updated: (TIKA-339) HtmlParser & TXTParser should not use language returned by CharsetDetector if language hint has been provided

["Ken Krugler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TIKA-339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ken Krugler updated TIKA-339:
-----------------------------

    Attachment: TIKA-339.patch

Patch that uses metadata.add(CharsetDetector language) in the TXTParser, and skips this entirely in the HtmlParser.

Plus tests.

> HtmlParser & TXTParser should not use language returned by CharsetDetector if language hint has been provided
> -------------------------------------------------------------------------------------------------------------
>
>                 Key: TIKA-339
>                 URL: https://issues.apache.org/jira/browse/TIKA-339
>             Project: Tika
>          Issue Type: Bug
>    Affects Versions: 0.6
>            Reporter: Ken Krugler
>            Priority: Minor
>             Fix For: 0.6
>
>         Attachments: TIKA-339.patch
>
>
> Currently the code used to call CharsetDetector in both TXTParser and HtmlParser is that any incoming language in the metadata map gets replaced if the detector returns a language.
> Given the low reliability of this language result, it should only be used in cases where there is no provided language, as typically this is coming in from either the Http response header or (for the HtmlParser) a meta tag or some other tag attribute. In all those cases, the incoming language is more accurate than the guess by the CharsetDetector.

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