How about this ...

#!/usr/bin/perl

use LWP::Simple;
my $content = get 'http://www/mypage.html';
[download]

... or passing the URL to the script from the command line ...

#!/usr/bin/perl

use LWP::Simple;

my $url = shift @ARGV;
my $content = get $url;
[download]

... or from the command line ...

perl -MLWP::Simple -e 'print get "http://www/mypage.html"'
[download]

 

perl -le 'print+unpack("N",pack("B32","00000000000000000000001000010111"))'