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https://issues.apache.org/jira/browse/FOP-3251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17956199#comment-17956199
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Joao Goncalves commented on FOP-3251:
-------------------------------------
Fixed by
https://github.com/apache/xmlgraphics-fop/commit/efb7175d2d44d204da8ae95ca36cafd6612a67d9
> Basic-link external destination URL can be overwritten with previous values
> in an FO input stream
> -------------------------------------------------------------------------------------------------
>
> Key: FOP-3251
> URL: https://issues.apache.org/jira/browse/FOP-3251
> Project: FOP
> Issue Type: Bug
> Affects Versions: 2.10
> Reporter: Mark Custer
> Assignee: Joao Goncalves
> Priority: Major
> Labels: link
> Attachments: Hover_showing_19_overriding_OX_in_basic_link.png,
> test-links.fo, test-links.pdf
>
>
> I recently discovered that Apache FOP can overwrite the "url" value encoded
> in basic links.
> Example:
> If there are two basic links in a file, and the first has a value with the
> characters "2R" and the second link has the characters "33", then the second
> link that should have been "33" will render as "2R". I believe that this
> happening due to some hashing techniques to cut down on processing when
> trying to determine if various URIs are identical.
> I have attached both an XSL-FO file and its PDF result as rendered by Apache
> FOP 2.10. I've also included a screenshot showing how a hover of a link that
> has been overwritten (in that case, where the "OX" provided value is
> overwritten by the "19" from a previous link).
> I've only tested 2 versions so far (2.10 and 2.7), though, so I don't know
> how far back the issue spans.
> I should also say that though the examples in this file are contrived to show
> where the clashes occur, the reason I stumbled across this bug is because I
> have a set of PDF files that I need to create that have a large number of
> links with 6-digit hash values as part of their path, and Apache FOP is
> rendering many of those as indistinguishable duplicate values. If this is
> indeed an optimization issue for base URIs, and if this feature can be turned
> off with a configuration, just let me know, as that type of fix would more
> suffice for my use case.
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