Re: Multiple hosts in an array reference

--On Wednesday, November 26, 2008 2:30 PM -0600 Christopher A Bongaarts 
<[email protected]> wrote:

> In the immortal words of Quanah Gibson-Mount:
>> According to the Net::LDAP documentation:
>>
>> new ( HOST, OPTIONS )
>>
>> HOST may also be a reference to an array of hosts, host-port pairs or
>> URIs  to try. Each will be tried in order until a connection is made.
>> Only when  all have failed will the result of undef be returned.
> [...]
>>  $ldap_url = \@ldap_url;
>>  print "LDAP URL is now $ldap_url\n";
>>  $ldap=Net::LDAP->new("$ldap_url");
>
> Should be checking that $ldap is defined here to avoid the error ;)

Yeah, but first I want things to just work. :P

>> LDAP URL is now ARRAY(0x1a3752c0)
>
> And since you're passing an array referenced *interpolated into a
> string*, this will fail unless your LDAP server's hostname happens to
> be "ARRAY(0x1a3752c0)".

<http://www.perl.com/doc/manual/html/pod/perlref.html>

References can be created in several ways.

   1. .

      By using the backslash operator on a variable, subroutine, or value. 
(This works much like the & (address-of) operator in C.) Note that this 
typically creates ANOTHER reference to a variable, because there's already 
a reference to the variable in the symbol table. But the symbol table 
reference might go away, and you'll still have the reference that the 
backslash returned. Here are some examples:

          $scalarref = \$foo;
          $arrayref  = \@ARGV;
          $hashref   = \%ENV;
          $coderef   = \&handler;
          $globref   = \*foo;

I submit it is a reference to an array, at least according to the 
documentation from the Perl website.

In any case, if I change the code to be a pure reference, I still get the 
same problem:

  $ldap=Net::LDAP->new("\@ldap_url");

>> Now, if I switch back to just a single URI, things work just fine:
>>
>> LDAP URL is ldap://freelancer.lab.zimbra.com:389
>
> Why this prints a string instead of the ARRAY(xxx) I can't figure out.

Because I commented the array bits out and just left it a plain string on a 
single value. ;)

--Quanah

--

Quanah Gibson-Mount
Principal Software Engineer
Zimbra, Inc
--------------------
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