Update

Recently (it's early September 2008) Microsoft released an update that made the original example in this entry fail with an error along to the lines of:

a:InternalServiceFault <faultstring xml:lang="en-GB">The server was unable to process the request due to an internal error.  For more information about the error, either turn on IncludeExceptionDetailInFaults (either from ServiceBehaviorAttribute or from the &lt;serviceDebug&gt; configuration behavior) on the server in order to send the exception information back to the client, or turn on tracing as per the Microsoft .NET Framework 3.0 SDK documentation and inspect the server trace logs.</faultstring></s:Fault>

Thanks to a colleague, here's a very minor alteration that should fix the problem:

use SOAP::Lite; # +trace
use strict;

my $uri = 'http://www.webserviceX.NET';
my $url = 'http://www.webservicex.net/globalweather.asmx';

my $soap = SOAP::Lite
       ->uri($uri)
       ->on_action( sub { '"' . $uri . $_[1] . '"' } ) # surround with double quotes
       ->proxy($url)
       ->autotype(0);

# $soap->readable(1);

my $method = SOAP::Data->name('GetWeather')->attr({xmlns =>$uri});

my $result = $soap->call($method => (
      SOAP::Data->name('CityName')->value('Cambridge'),
      SOAP::Data->name('CountryName')->value('United Kingdom'),)
)->result;

The original example below probably works with .NET web services that haven't yet had the latest update from Microsoft applied:

use SOAP::Lite; # +trace
use strict;

my $uri = 'http://www.webserviceX.NET';
my $url = 'http://www.webservicex.net/globalweather.asmx';

my $soap = SOAP::Lite
       -> uri($uri)
       -> on_action( sub { join '/', $uri, $_[1] } )
       -> proxy($url);
       

$soap->autotype(0);
# $soap->readable(1);

my $method = SOAP::Data->name('GetWeather')->attr({xmlns =>$uri});

my $result = $soap->call($method => (
      SOAP::Data->name('CityName')->value('Cambridge'),
      SOAP::Data->name('CountryName')->value('United Kingdom'),)
)->result;