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https://issues.apache.org/jira/browse/TIKA-447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12895192#action_12895192
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Jukka Zitting commented on TIKA-447:
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I committed my patch in revision 982175.
> memory and processing impact of opening the container
I think this acceptable as the extra cost is only associated with specific
media types, and we can use the open container feature you added to
TikaInputStream to allow later parsing stages to avoid duplicating these costs.
Also, since this functionality is now only triggered when the detector is
passed a TikaInputStream, a performance-conscious user can easily prevent the
extra processing. We might also want to add some extra flag for this if needed.
> detectors run in the right order
This was a part of my thinking behind the proposed getSupportedTypes() method.
With that we could choose to only run these kinds of more complex detectors
when simpler detectors have first identified the basic container format.
> 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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