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https://issues.apache.org/jira/browse/TIKA-3969?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17686114#comment-17686114
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Tim Allison commented on TIKA-3969:
-----------------------------------
This isn't you. This is us. There's a subtle difference in the handlers used
in tika-app and tika-server. We're using the "RichTextContentHandler" in
server but not in app. I think I've known about this for a while, but we'll be
breaking behavior for whichever one we fix.
Any recommendations?
> Inconsistent behavior on EPUB text extraction between tika-server and tika-app
> ------------------------------------------------------------------------------
>
> Key: TIKA-3969
> URL: https://issues.apache.org/jira/browse/TIKA-3969
> Project: Tika
> Issue Type: Improvement
> Components: tika-app, tika-server
> Affects Versions: 2.6.0
> Environment: I’m using a -smart toaster- PC running Linux Mint 20.1
> (Ulyssa), MATE edition.
> Reporter: Johan van der Knijff
> Priority: Minor
>
> While doing some tests with Tika for text extraction from EPUB, I ran into
> what looks like an inconsistency between the behavior of Tika-app and
> Tika-server.
> I’m using below EPUB file as an example:
> [https://www.dbnl.org/tekst/berk011veel01_01/ebook/berk011veel01_01.epub]
> Using the tika-app JAR, I can extract the text from this EPUB using this
> command:
> {code:java}
> java -jar ~/tika/tika-app-2.6.0.jar -t berk011veel01_01.epub >
> berk011veel01_01_tika-app.txt{code}
> Output in this case is as expected.
> So then I tried this using the server. After firing up the server I use this:
> {code:java}
> curl -T berk011veel01_01.epub http://localhost:9998/tika --header "Accept:
> text/plain" > berk011veel01_01-tika-server.txt{code}
> In this case, Tika’s output contains elements (between square brackets) with
> alt-text descriptions of images. For example (from the first page of this
> book):
>
> {noformat}
> [image: cover]
> Aster Berkhof
> Veel geluk, professor!
> [image: DBNL]
> Colofon
> {noformat}
>
> These image references + alt-text description don't appear in the tika-app
> output! Not sure if this is the intended behavior, or perhaps I’m doing
> something wrong myself, or I’m missing some obvious option?
> See also this related Tika-python issue (I initially thought this was a
> Tika-python problem, which on closer inspection it isn't):
> [https://github.com/chrismattmann/tika-python/issues/389]
>
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