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https://issues.apache.org/jira/browse/TIKA-447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12967055#action_12967055
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Jukka Zitting commented on TIKA-447:
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In revision 1042497 I added an auto-loading mechanism for detectors so that
tools like the Tika facade or the AutoDetectParser class can automatically pick
up all detector implementations in the current classpath. This way also the
container-aware detectors can be used with minimal changes to client code.
To prevent excessive performance overhead, both the Zip and POIFS detectors
will first check for the relevant magic byte header and will only do the more
expensive format check if the byte header matches and if the given stream is a
TikaInputStream instance.
In revision 1042498 I added a new --detect option to the CLI for easier testing
of the auto-detect functionality. Also, since the container-aware detectors are
now automatically loaded and used, there's no longer any need for the explicit
--container-aware-detector option and I've turned it into a no-op.
> Container aware mimetype detection
> ----------------------------------
>
> Key: TIKA-447
> URL: https://issues.apache.org/jira/browse/TIKA-447
> Project: Tika
> Issue Type: New Feature
> Components: mime
> Affects Versions: 0.7
> Reporter: Nick Burch
> Attachments: TIKA-447-TikaInputStream.patch,
> TikaContainerDetection.patch
>
>
> As discussed on the dev list, Tika should ideally have a configurable way to
> process container based formats (eg zip files and ole2 files) when trying to
> detect the correct mime type for a document.
> This needs to be configurable, because some people won't want Tika to have to
> do all the work of parsing the whole file when they're not interested in
> knowing exactly what's in it
> Once we have gone to the trouble of opening and parsing the container file,
> we should try to keep the open container around to speed up parsing of the
> contents
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