I thought the relatively easy part of this would be to make a script that connected to the lightningmaps server and printed out the events. I haven't done the PDL/3D side yet, but 4 hours of agony wasn't incredibly easy. This was mainly due to lightningmaps "proper" having a somewhat complicated protocol you have to keep sending it, and the quasi-underlying blitzortung service doing some overly-clever compression on its messages (see https://github.com/mrk-its/homeassistant-blitzortung/issues/74 for a Python decoder, and my Perl port). Nevertheless, here is a script that will spam your terminal with JSON messages about lightning strikes around the world: 
use strict; use warnings;
use Mojo::UserAgent;
use Mojo::JSON qw(decode_json);
use Encode qw(encode);
my $ua = Mojo::UserAgent->new;
$ua->websocket("wss://ws1.blitzortung.org/" => sub { my ($ua, $tx) = @
+_;
  print "WebSocket handshake failed!\n" and return unless $tx->is_webs
+ocket;
  $tx->on(message => sub { my ($tx, $chars) = @_;
    $chars = blitz_decode($chars);
    my $bytes = encode('UTF-8', $chars, Encode::FB_CROAK);
    my $hash = decode_json $bytes;
    use Data::Dumper; print "message ", Dumper $hash;
  });
  $tx->send({json=>{a=>111}});
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

# code from https://github.com/mrk-its/homeassistant-blitzortung/issue
+s/74
sub blitz_decode {
  my ($data) = @_;
  my %e;
  my @d = split //, $data;
  my @g = my $f = my $c = $d[0];
  my $o = 256;
  for my $ind (1..$#d) {
    my $ord = ord($d[$ind]);
    my $str = $ord < 256 ? $d[$ind] : exists $e{$ord} ? $e{$ord} : $f 
+. $c;
    push @g, $str;
    $c = substr $str, 0, 1;
    $e{$o++} = $f . $c;
    $f = $str;
  }
  join('', @g);
}

[download]
Edit to add: actually, the user-facing lightningmaps protocol is revealed by reading the JS (see https://www.lightningmaps.org/min/index.php?f=js/realtime.js&1687455813), which isn't overly minified, and with text-search for data.ws. shows what's being sent and received. The blitzortung JS on the other hand goes all in on minification, including actually obfuscating var names with randomised hex numbers.

In reply to Re: Module name: PDL::WebSocket? by etj
in thread Module name: PDL::WebSocket? by etj

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