[Koha-bugs] [Bug 33047] New: Local cover image fetchers return 500 internal error when image not available

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=33047

            Bug ID: 33047
           Summary: Local cover image fetchers return 500 internal error
                    when image not available
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: P5 - low
         Component: Architecture, internals, and plumbing
          Assignee: koha-bugs at lists.koha-community.org
          Reporter: gmcharlt at gmail.com
        QA Contact: testopia at bugs.koha-community.org

Because of an uncaught exception, both catalogue/image.pl and
opac/opac-image.pl return 500 errors when asked to provide the image by
biblionumber for a bib that does not exist.


This is a bit untidy; if the bib does not exist, *image.pl should either return
the default one-pixel image or perhaps a 404, but not the error page.

This normally isn't a huge deal when the local cover images are displayed by
the staff or public catalog, as both of those interfaces inherently only
display bibs that are known to exist.

However, since it is possible for external clients to want to get at local
cover images (e.g., see https://github.com/vufind-org/vufind/pull/2444), better
provision should be made if the client requests the local cover of a
nonexisting bib (e.g., if the bib had been deleted since the last time that the
external client got knowledge of it).

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