macOS/OSX comes with tools that make it
super easy to write native GUI
applications with Applescript and Perl!
This example uses the cool and free
Robtex API to validate
Autonomous System Numbers for networks
in the global BGP table. Applescript provides
plenty of ways to collect and
display data, handle errors, and can
launch terminals and text editors or any
app and automate the entire operating system
GUI while Perl does
pretty much anything else you can imagine.
Start : Applications -> Automator
Select: File -> New
Select: Application
We're going to create an application but Automator
can also encapsulate Perl into a Service,
Image Capture Plugin, Dictation Command, Folder Action,
Calendar Alarm, Print Plugin or Workflow.
Now that Automator is open click the Library icon
or select View -> Show Library.
Select: Actions -> Utilities -> Run AppleScript (double click it)
Replace the default code with this:
(* Demonstration MacOS/OSX app in AppleScript and Perl *)
(* Posted at perlmonks.org by Anonymous Monk 6/13/2018 *)
(* Node: How to write apps for macOS/OSX in Perl! *)
repeat
repeat
try
set ASN to text returned of (display dialog "Autonomous Sy
+stem Number:
(Example: 714 is Apple Inc. 666 does not exist. Blank to exit.)" with
+title "Perl ASN Check" default answer "" buttons {"Check"} default bu
+tton 1)
set ASN to ASN as number # require a number
exit repeat # continue if ASN is numeric
on error # not a number?
display alert "Please enter an Autonomous System Number!"
+as critical
end try
end repeat
if ASN is equal to 0 then return # exit if blank
# ALL MACS HAVE PERL BABY!
set RES to do shell script "
perl -MHTTP::Tiny -e '
my $r = HTTP::Tiny->new->get(q~https://freeapi.robtex.com/
+asquery/" & ASN & "~);
if (length $r->{content}) {
$r->{content} =~ /[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+/
? print q~ASN Exists!~ : print q~ASN Not Found!~;
}
else {
print q~Download failed!~
}
'
"
display alert RES
end repeat
Save the application and double click its icon in
finder. BEHOLD! Perl apps for macOS/OSX!!!
(Tips: In the Perl code avoid single quotes and be
prepared to do some extra backslashing.)
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