用於DOM的Perl XML解析器

Question

我想解析性能統計（3gpp 32.435）。結構並不像我希望的那麼簡單，請參閱示例。我要尋找的結果是有

endTime:measType:measValue 

我曾嘗試使用Perl腳本來提取值的文本輸出，但是你可以看到，對於SGSN-MME_Session_SM_G有兩種類型和兩個值，所以我的腳本的結果是

 SM.SuccActSecondPdpContext.G 
    SM.UnsuccActPdpContextCC38.G 

     1 
     473764 

如果有人可以給我一個提示如何解析這個XML或如何從父母的兩個孩子加入類型和值。我會很感激，感謝..

腳本使用：

#!/usr/bin/perl 

use 5.010; 
use strict; 
use warnings; 

use XML::LibXML; 

my $filename = 'file.xml'; 

my $dom = XML::LibXML->load_xml(location => $filename); 

foreach my $measvalue ($dom->documentElement) { 
     say $measvalue->to_literal(); 
    } 

XML文件：

<?xml version="1.0" encoding="UTF-8"?> 
<?xml-stylesheet type="text/xsl" href="MeasDataCollection.xsl"?> 
<measCollecFile xmlns="http://www.3gpp.org/ftp/specs/archive/32_series/32.435#measCollec"> 
    <fileHeader fileFormatVersion="32.435 V9.0" vendorName="New Vendor"> 
     <fileSender /> 
     <measCollec beginTime="2017-10-09T20:17:00+03:00" /> 
    </fileHeader> 
    <measData> 
     <managedElement localDn="TestNode" /> 
     <measInfo measInfoId="SGSN-MME_Mobility_U"> 
     <job jobId="customPdcJob" /> 
     <granPeriod duration="PT60S" endTime="2017-10-09T20:18:00+03:00" /> 
     <repPeriod duration="PT60S" /> 
     <measType p="1">succGprsAttachUmts</measType> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnFunction=1"> 
      <r p="1">132737759</r> 
     </measValue> 
     </measInfo> 
     <measInfo measInfoId="SGSN-MME_Session_DiscardedMessages_G"> 
     <job jobId="customPdcJob" /> 
     <granPeriod duration="PT60S" endTime="2017-10-09T20:18:00+03:00" /> 
     <repPeriod duration="PT60S" /> 
     <measType p="1">discardedSessionMgmnt</measType> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnFunction=1"> 
      <r p="1">12368</r> 
     </measValue> 
     </measInfo> 
     <measInfo measInfoId="SGSN-MME_Session_SM_G"> 
     <job jobId="customPdcJob" /> 
     <granPeriod duration="PT60S" endTime="2017-10-09T20:18:00+03:00" /> 
     <repPeriod duration="PT60S" /> 
     <measType p="1">SM.SuccActSecondPdpContext.G</measType> 
     <measType p="2">SM.UnsuccActPdpContextCC38.G</measType> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnFunction=1"> 
      <r p="1">1</r> 
      <r p="2">473764</r> 
     </measValue> 
     </measInfo> 
     <measInfo measInfoId="SGSN-MME_Session_SM_U"> 
     <job jobId="customPdcJob" /> 
     <granPeriod duration="PT60S" endTime="2017-10-09T20:18:00+03:00" /> 
     <repPeriod duration="PT60S" /> 
     <measType p="1">SM.UnsuccActPdpContextCC38.U</measType> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnFunction=1"> 
      <r p="1">737355</r> 
     </measValue> 
     </measInfo> 
     <measInfo measInfoId="SGSN-MME_SystemResource_PIU"> 
     <job jobId="customPdcJob" /> 
     <granPeriod duration="PT60S" endTime="2017-10-09T20:18:00+03:00" /> 
     <repPeriod duration="PT60S" /> 
     <measType p="1">SYS.gsnApCpuUsage</measType> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnMme=1,PIU=1.1"> 
      <r p="1">6</r> 
     </measValue> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnMme=1,PIU=1.3"> 
      <r p="1">5</r> 
     </measValue> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnMme=1,PIU=1.5"> 
      <r p="1">5</r> 
     </measValue> 
     <measValue measObjLdn="ManagedElement=TestNode,SgsnMme=1,PIU=1.7"> 
      <r p="1">5</r> 
     </measValue> 
     </measInfo> 
    </measData> 
    <fileFooter> 
     <measCollec endTime="2017-10-09T20:18:00+03:00" /> 
    </fileFooter> 
</measCollecFile> 

Answer 1

use strict; 
use warnings qw(all); 
use feature qw(say); 

use XML::LibXML    qw(); 
use XML::LibXML::XPathContext qw(); 

my $doc = XML::LibXML->load_xml(location => $filename); 

my $xpc = XML::LibXML::XPathContext->new(); 
$xpc->registerNs(m => 'http://www.3gpp.org/ftp/specs/archive/32_series/32.435#measCollec'); 

for my $measInfoNode ($xpc->findnodes('/m:measCollecFile/m:measData/m:measInfo', $doc)) { 
    my $endTime = $xpc->findvalue('m:granPeriod/@endTime', $measInfoNode); 
    my $measType = $xpc->findvalue('m:measType', $measInfoNode); 
    for my $measValueNode ($xpc->findnodes('m:measValue', $measInfoNode)) { 
     my $measValue = $xpc->findvalue('m:r', $measValueNode); 
     say join ":", $endTime, $measType, $measValue; 
    } 
}