Works on W10, but not on Debian

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

Hi, Monks!

This line of code that extracts all viewers/lurkers online in a twitch IRC chat, works fine on W10, but not on Debian... any idea why?

#!/usr/bin/perl
use Mojo::UserAgent;

sub chatters {
    my $url = "https://tmi.twitch.tv/group/user/bobross/chatters";
    return unless my $data = Mojo::UserAgent->new->get($url)->res->jso
+n;

    map { @$_ } values %{ $data->{chatters} };
}

@users = chatters();
print "@users\n";
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Comment on Works on W10, but not on Debian Download Code

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Re: Works on W10, but not on Debian by haukex (Archbishop) on Jan 07, 2018 at 19:17 UTC
Perhaps IO::Socket::SSL isn't installed? (It comes preinstalled with Strawberry Perl.) If you're using the system Perl, try `sudo apt-get install libio-socket-ssl-perl`, otherwise try `cpan IO::Socket::SSL` (you might need to do `sudo apt-get build-dep libio-socket-ssl-perl`). Update: Added a bit more info.	[reply] [d/l] [select]
Re: Works on W10, but not on Debian by marto (Cardinal) on Jan 07, 2018 at 19:19 UTC
This works fine for me on Debian & Ubuntu. Are you using the same version of Mojolicious on both systems? Leaving Perl out of the equation can you get to this URL from the Debian system? Tutorials->Debugging and Optimization->Basic debugging checklist.	[reply]
Re: Works on W10, but not on Debian by morgon (Priest) on Jan 07, 2018 at 19:07 UTC
What about some error checking/reporting? The get method returns an object that has an error method. Looking at that should give some hint. I would assume you have some certificate problem as you access an https-url.	[reply]
Re: Works on W10, but not on Debian by Anonymous Monk on Jan 08, 2018 at 00:48 UTC
I removed the "s" in "https" and now it works.	[reply]
Re^2: Works on W10, but not on Debian by marto (Cardinal) on Jan 08, 2018 at 11:43 UTC
So the advice regards SSL would seem to be correct. It's important to try and ensure that your perl environments are the same (or as similar as feasibly possible).	[reply]
Re^2: Works on W10, but not on Debian by i5513 (Pilgrim) on Jan 08, 2018 at 11:46 UTC
Hello, Better install ssl dependencies like suggested at Re: Works on W10, but not on Debian. Check you have the certificated trust in your truststore Regards	[reply]
Re: Works on W10, but not on Debian by Anonymous Monk on Jan 08, 2018 at 15:14 UTC
Also, if you have an error-indicator available after an operation, check that indicator and `die` if something is wrong ... unless you have an option to tell the package to throw-up for you. That's sometimes the only way that you can be aware that something has failed to work.	[reply]