perfSONAR User Q&A and Other Discussion

[Andrew Lake <>]

Hi Weiping,

The html on the page was causing those lines to be displayed incorrectly. The 
</ in the regular expression was the source of the problem. I have now 
corrected the page. The correct code block looks like the following:

if( $hLSResult->{response} && $hLSResult->{response} =~ /^<./ ){
            # Print list of matching bwctl server addresses
            my $resParser = XML::LibXML->new();
            my $hLSDoc = $resParser->parse_string($hLSResult->{response});

Also, if it helps you may download the code examples on this page here: 
http://psps.perfsonar.net/ps-client-examples-v1.1.tar.gz. There is also a 
link to this file on the bottom of the page.

Thanks!
Andy


On Apr 30, 2010, at 1:09 PM, Jason Zurawski wrote:

> Hello,  I am trying to understand lookup service based on the address
> 
> http://psps.perfsonar.net/client-doc.html
> 
> In the paragraph
> 
> The instance in the above example is the URL of an LS service to contact. 
> Examples
> 1. Find all SNMP Measurement Archives
> 
> 
> There are examples how to crate XQuery to be sent to home lookup services
> 
> In the example code (XQuery to be sent up to home lookup based on Find all 
> SNMP Measurement Archieves)
> 
> 
> (Line1) if($hLSResult->{response} && $hLSResult->{response} =~ /^new();
> (Line2)            my $hLSDoc = 
> $resParser->parse_string($hLSResult->{response});
> 
> 
> 
> For some reason, perl can't understand (Line1) to (Line2)
> 
> for example
> 
> in Line2 , it is using $resParser but $resParser is not declared anywhere 
> in the code
> and when I run the code, it complains about it
> 
> 
> 
> if I change $resParser to $parser, it complains that
> 
> Thread 65 terminated abnormally: Can't call method "parse_string" on 
> unblessed reference
> 
> 
> Thank you
>