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https://issues.apache.org/jira/browse/TIKA-3710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17538974#comment-17538974
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Tim Allison commented on TIKA-3710:
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The hiccup is this point in the mimetypes.xml file.
{noformat}
<!-- The magic priority needs to be lower than that of -->
<!-- files which contain HTML within them, eg mime emails -->
<magic priority="40">
{noformat}
Even if the file starts with {{<html>}}, we're identifying the file as
{{appplication/rfc822}}.
> HTML document detected incorrect as message/rfc822
> --------------------------------------------------
>
> Key: TIKA-3710
> URL: https://issues.apache.org/jira/browse/TIKA-3710
> Project: Tika
> Issue Type: Bug
> Components: detector
> Affects Versions: 2.3.0
> Reporter: Sam Stephens
> Priority: Major
> Attachments: html-that-looks-like-rfc822.html
>
>
> I'm detecting content types and extracting text from documents using the
> AutoDetectParser.
> I've received some documents that are HTML fragments generated from emails.
> The documents are clearly HTML, not emails, but the AutoDetectParser gives me
> the MIME type message/rfc822 and no text. I've attached an example.
> It looks like the presence of From:, Sent:, and Subject: at the beginning of
> lines is why the documents are matching RFC822. However, I believe the
> presence of HTML before these headers means the document is not valid RFC822.
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