[jira] [Commented] (TIKA-3332) Embedded files not extracted from PDF files with multilevel EmbeddedFiles tree

["Tilman Hausherr (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TIKA-3332?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17305547#comment-17305547 ] 

Tilman Hausherr commented on TIKA-3332:
---------------------------------------

The ExtractEmbeddedFiles.java example code in PDFBox is flawed because it extracts only one level. The Tika code is aware of this flaw because there is a comment
{code:java}
        //If there is a need we could add a fully recursive search to find a non-null
        //Map<String, COSObjectable> that contains the doc info. {code}
Can you attach one of these files?

> Embedded files not extracted from PDF files with multilevel EmbeddedFiles tree
> ------------------------------------------------------------------------------
>
>                 Key: TIKA-3332
>                 URL: https://issues.apache.org/jira/browse/TIKA-3332
>             Project: Tika
>          Issue Type: Bug
>    Affects Versions: 1.25
>            Reporter: Ross Johnson
>            Priority: Major
>         Attachments: image-2021-03-20-13-36-48-525.png
>
>
> I have come across some portfolio PDFs that have many attachments / embedded files, but Tika is not detecting or extracting them as it does with some other portfolio PDFs. The issue may be that these files have a multilevel EmbeddedFiles name tree that is not being handled properly by PDFBox.
> Here is the EmbeddedFiles structure of one of the PDF portfolios in question. Notice that the root EmbeddedFiles dictionary has a Kids array that only consists of intermediate dictionaries, with the actual Names array being one more level down.
> !image-2021-03-20-13-36-48-525.png!



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