Perl SOAP::Lite server basics - perl

Question

I'm trying to write a soap server with SOAP::Lite to work with existing soap clients (specifically tr-069 dsl modems), but it's unclear how incoming xml triggers calls. The soap lite mail list moderator is being slow about adding me to their list, so I thought I'd see if anyone here can help point me in the right direction...
For starters, I'm getting:
<faultstring>Unrecognized header has mustUnderstand attribute set to 'true'</faultstring>
which I suspect means that I haven't defined a function to handle something that it wants handled. The handler code (based on the example in the SOAP::Server man page):
SOAP::Transport::HTTP::CGI
->dispatch_to('PeakACS')
->handle;
BEGIN {
package PeakACS;
use vars qw(#ISA);
#ISA = qw(Exporter SOAP::Server::Parameters);
use SOAP::Lite;
my $debugging = 1;
my $console = 0;
my $prog_id = 'peakacs';
my $log = DebugLog->new($prog_id, $debugging, $console);
$log->debug_msg('info', 'handle', '%s', 'handler setup');
sub ID {
$log->debug_msg('info', 'id', '%s', 'got an id');
}
sub Header {
$log->debug_msg('info', 'header', '%s', 'heading');
}
sub Inform {
$log->debug_msg('info', 'inform', '%s', 'informing');
}
}
If I understand SOAP right (which is far from a given), the tag should translate into a call to Inform - the top of the xml request looks like:
<SOAP-ENV:Envelope
xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/"
xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:cwmp="urn:dslforum-org:cwmp-1-0">
<SOAP-ENV:Header>
<cwmp:ID SOAP-ENV:mustUnderstand="1">1539095918</cwmp:ID>
</SOAP-ENV:Header>
<SOAP-ENV:Body>
<cwmp:Inform>
<DeviceId>

Answer 1

If you want to set mustUnderstand attribute to some entity in Header, do this:
$sheader = SOAP::Header->name('someEntity');
$sheader->mustUnderstand(1);
And when calling a method:
$soap->someMethod($sheader,#request);
Which produces:
<soap:Header>
<someEntity soap:mustUnderstand="1" />
</soap:Header>