Question

So questions is:

1. This is reporting application making use of Catalyst frameworks
2. In Controllers, I generate QR code images and want to pass this URL (of generated image)
   to specific view/front end? Note: I do not want to pass binary or base64 data from
   controller to view?
3. What should I stash in $c->stash->{Images} = ????

Any idea, hints ? Please guide…

Answer 1

Personally, I bypass the View entirely, and set the content-type and body to return an image directly from a controller in situations like this. Writing the image out to a file just so another call to the server can retrieve it seems neither sensible nor scalable. Ultimately, unless you’re doing something very unorthodox, you’ll be requesting the image from a page using <img src="..."/> anyway.

package SomeController;
...
sub qrcode :Local {
    my ($self, $c, @args) = @_;
    my $png;
    eval { $png = ... } } ||
        $c->res->redirect($c->uri_for('/static/images/sorry_qrcode_failed.png'));
    $c->res->content_type('image/png');
    $c->res->body($png);
}

… and your page requests

<img src="/somecontroller/qrcode/foo/bar" />

Hope that helps.