Dear Monks,

I'm trying to use Imager to scale an Image, which I get from a Catalyst upload request. Then I want to store the original image, an image of medium quality and a thumbnail via DBIx::Class::InflateColumn::Fs on the Filesystem.

The following code works perfect (just storing the original image without using Imager):

my $fh = $c->req->upload('original')->fh;
$self->form->item->original($fh);
$self->form->item->update;
# The DBIx::Class row object comes from FormHandler,
# but thats not important here

[download]

Now I try to use Imager to get my thumbnail and medium image. This is probably pretty naive:

my $fh = $c->req->upload('original')->fh;
binmode $fh;
my $img = Imager->new(fh => $fh)
  or die "Cannot read $fh ", $img->errstr;
my $medium = $img->scale(xpixels => 640, ypixels => 640, type => 'min'
+);
my $thumb = $img->scale(xpixels => 200, ypixels => 200, type => 'min')
+;
$self->form->item->medium_pfad($medium);
$self->form->item->thumb_pfad($thumb);
$self->form->item->original($fh);
$self->form->item->update;

[download]

Everything seems to go fine, but the generated images are corrupted, even the original. I've tried numerous variants...

The only way I could get this to work was writing the files to disk first an reading them in again:

$img->write(file => 'a.jpg');
$medium->write(file => 'b.jpg');
$thumb->write(file => 'c.jpg');
$fho = new IO::File "> a.jpg";
$fhm = new IO::File "> b.jpg";
$fht = new IO::File "> c.jpg";
# Then use these filehandles...

[download]

But this is obviously stupid. I'm sure that I just don't understand how filehandles work in Perl. Any help would be greatly appreciated.

In reply to Imager - Problem with Filehandle (Catalyst, DBIx::Class::InflateColumn::FS) by scrivener

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