如何使用XML :: Twig从URL中提取一些XML数据? [英] How can I extract some XML data from a URL using XML::Twig?

问题描述

我想获取一个特定的字符串，例如从中的< received> 123</received>中的123. 一些将从URL检索的XML.

I want to get a specific string, for example 123 in <received>123</received> from some XML that will be retrieved from a URL.

我已经写了一个代码，但是遇到了错误消息:

I have write a code but stuck with an error message:

尝试在/usr/share/perl5/XML/Twig.pm第392行引用一个引用.

Attempt to bless into a reference at /usr/share/perl5/XML/Twig.pm line 392.

我该如何解决?

代码:

use XML::Twig;
use LWP::Simple;

my $url = 'http://192.168.1.205:13000/status.xml';
my $twig = new XML::Twig(TwigRoots => {
'smsc/received' => sub {$author = $_[1]->text;  }});
$twig->nparse( $url );
$twig->print;

推荐答案

nparse为您处理new(因此为'n')，在这种情况下，您想要的可能是xparse，或者只是让该模块将其找出并执行以下操作:

nparse takes care of the new for you (hence the 'n'), what you want in this case is probably xparse, or just let the module figure it out and do this:

my $url= 'http://192.168.1.205:13000/status.xml';
my $twig= XML::Twig->parse( twig_roots => 
                              { 'smsc/received' => sub { $author= $_[1]->text;}},
                             $url
                           );
$twig->print; # I am not sure why you print the twig instead of just $author

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