Many thanks to David, Bruce and Karl for suggestions - all were helpful!
David and Bruce both reminded me that scalar variables can be treated as
file handles:
open(my $fh, "<", \$xml) or die "Couldn't open file handle: $!";
my $batch = MARC::Batch->new( 'XML', $fh );
I had tried this without luck earlier. David kindly sent a complete
example - which worked in isolation, but failed in the context of my
program with a frustrating "Couldn't open file handle: Invalid argument"
until I realized I'd forgotten the essential "use warnings"... which gave
me the frustrating but much more helpful:
"Strings with code points over 0xFF may not be mapped into in-memory file
handles"
A moment with Google found pages like this:
https://bugzilla.redhat.com/show_bug.cgi?id=1048324
which helped me realize that the XML I was retrieving from WorldCat really
was encoded as UTF-8, which I hadn't accounted for so far.
Wrapping my retrieved XML like so:
utf8::encode($contents);
has resolved the problem, so far at least - have to test more with records
with diacritics to be sure. But this helps me move forward.
Thanks again! --Andy
On Wed, Apr 18, 2018 at 4:25 PM, Andy Kohler <[email protected]> wrote:
> Hi -
>
> I'm pulling records from the WorldCat Search API in MARCXML, and need to
> convert them to binary MARC for further evaluation, which I'll do via
> MARC::Record.
>
> Problem: Converting from MARCXML via MARC::File::XML seems to require
> reading the records from a file. I've already got the XML stored in a
> variable, retrieved via LWP::Simple->get().
>
> Do I have to write the XML to a file, then read it in again to convert
> it? Or am I just missing something obvious?
>
> I've tried things like:
> $xml = get($api_call); # also verified that $xml now contains MARCXML for
> 1 or more records
> my $batch = MARC::File::XML->in($xml);
> while (my $record = $batch->next()) {
> print $record;
> }
> but I get the error: Can't call method "next" on an undefined value
>
> Thanks --Andy
>
>
