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https://issues.apache.org/jira/browse/PDFBOX-3163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15056520#comment-15056520
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Benjamin Gamard commented on PDFBOX-3163:
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Using
https://github.com/drewnoakes/metadata-extractor/blob/e3febc74d77920df18c601c01062edf7f7d76d2a/Source/com/drew/imaging/FileTypeDetector.java
it looks perfect.
> PDImageXObject.createFromFile should relies on header bytes
> -----------------------------------------------------------
>
> Key: PDFBOX-3163
> URL: https://issues.apache.org/jira/browse/PDFBOX-3163
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Benjamin Gamard
> Original Estimate: 3h
> Remaining Estimate: 3h
>
> PDImageXObject.createFromFile currently relies on file extension to select
> the correct factory.
> Often, file extension is not set or not correct.
> It should be better to use the first bytes.
> I did something similar here if it can helps:
> https://github.com/sismics/docs/blob/master/docs-core/src/main/java/com/sismics/util/mime/MimeTypeUtil.java#L26
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