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https://issues.apache.org/jira/browse/TIKA-879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14342738#comment-14342738
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Nick Burch commented on TIKA-879:
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It might be good to try the widened versions with Tika Batch, to see if on a
wide range of files it causes any noticable slowdown or false positives?
I still think this isn't a file format that can be fully reliably detected with
mime magic alone, and ideally we do need a dedicated detector for it as
mentioned above, to fully solve this and related (eg multipart/signed) detection
> Detection problem: message/rfc822 file is detected as text/plain.
> -----------------------------------------------------------------
>
> Key: TIKA-879
> URL: https://issues.apache.org/jira/browse/TIKA-879
> Project: Tika
> Issue Type: Bug
> Components: metadata, mime
> Affects Versions: 1.0, 1.1, 1.2
> Environment: linux 3.2.9
> oracle jdk7, openjdk7, sun jdk6
> Reporter: Konstantin Gribov
> Labels: new-parser
> Attachments: TIKA-879-thunderbird.eml
>
>
> When using {{DefaultDetector}} mime type for {{.eml}} files is different (you
> can test it on {{testRFC822}} and {{testRFC822_base64}} in
> {{tika-parsers/src/test/resources/test-documents/}}).
> Main reason for such behavior is that only magic detector is really works for
> such files. Even if you set {{CONTENT_TYPE}} in metadata or some {{.eml}}
> file name in {{RESOURCE_NAME_KEY}}.
> As I found {{MediaTypeRegistry.isSpecializationOf("message/rfc822",
> "text/plain")}} returns {{false}}, so detection by {{MimeTypes.detect(...)}}
> works only by magic.
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