--64- --url- Was: New Threshold Syntax

Am 30.06.13 19:08, schrieb Jochen Bern:
> And while we're on the subject of "proper" notation involving 
> characters that *happen* to be special chars to 90+% of all shells out 
> there, and since we're talking about providing a *library* to plugin 
> authors: No amount of exegesis on the parameter syntax will ever solve 
> as many problems as the simple sentence "for every valid option '--foo 
> bar', the plugin will accept '--64-foo baz' and '--url-foo org' to the 
> same effect, where 'baz'=base64('bar') and 'org'=urlencode('bar')." 
> (Extra points to whoever manages to put matching *EN*coding 
> functionality into transport-providing plugins like check_by_ssh. ;-) 
> Kind regards, J. Bern 
Thanks for that! I remembered it when I had today the issue of having to 
supply something like "^(foo|bar|baz)" to one of my scripts.

Since I did not want to add several "new" commandline parameters (I'm 
using perl's Getopt::Long), I programmed it like this. After reading my 
parameters into my variables, I simply do this loop:

foreach ( $user, $pass, @binds, @placeholders ) { # Those are my parameters
     next unless defined $_ and s/^enc:(\w+)://;
     $_= decoder($1, $_);
}

sub decoder {
     my ($encoding, $str)= @_;
     SWITCH: for ($encoding) {
         /^url$/i && return uri_unescape($str);
         /^64$/ && return decode_base64($str);
     }
     return "enc:$encoding:$str";
}

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