[Koha-bugs] [Bug 11581] New: HTTP 404s generated badly in some cases

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

http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=11581

            Bug ID: 11581
           Summary: HTTP 404s generated badly in some cases
 Change sponsored?: ---
           Product: Koha
           Version: master
          Hardware: All
                OS: All
            Status: NEW
          Severity: minor
          Priority: P5 - low
         Component: Architecture, internals, and plumbing
          Assignee: gmcharlt at gmail.com
          Reporter: gmcharlt at gmail.com
        QA Contact: testopia at bugs.koha-community.org

There are several scripts that do the following when they want to signal that a
resource (usually a MARC record) does not exist:

    print $query->redirect("/cgi-bin/koha/errors/404.pl");

This is not great, because what actually happens is that an HTTP 302 redirect
is issued, followed by the 404.  This wastes a bit of time for the user agent,
and might be problematic if you let search engines crawl your OPAC.

Better would be doing 

   print $cgi->header( -status => '404 record not found');

or if a more specific message should be displayed, constructing it and calling

  output_with_http_headers $query, $cookie, $error_template->output, 'html',
'404 Not Found';

The affected scripts are:

catalogue/showmarc.pl
opac/opac-ISBDdetail.pl
opac/opac-MARCdetail.pl
opac/opac-authoritiesdetail.pl
opac/opac-detail.pl
opac/opac-export.pl
opac/opac-showmarc.pl
opac/opac-topissues.pl
opac/tracklinks.pl

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