How do I get the text value of an element using XML Parser?

krujos has asked for the wisdom of the Perl Monks concerning the following question:

I am trying to get the value between the elements and I am a little confused how to do this so far I have this to start my parser

#!/usr/bin/perl

use strict;
use warnings;
use CGI qw ( :standard );
use Fcntl qw ( :flock );
use XML::Parser;

if (param) {
   my ($parser, $document, $users);
   open(USERS, "../../xml_final/users/users.xml") ||
      die "Could not open users.xml $!";
   flock(USERS, LOCK_SH);

print header;
print start_html;

   $parser= new XML::Parser();
   $parser->setHandlers(
        Start => \&start_handler,
        #End   => \&end_handler,
   $document = $parser->parse (\*USERS);
   close (USERS);

   sub start_handler{
        my ($expat, $element, %attributes) =@_;
        my ($flag);
        $flag=0;

        if ($flag==0 && $element eq param("username")) {
           $flag=1;
        }
        if ($flag==1 && $element eq param("password")) {
           print p("Good Job");
        }
    }
[download]

what I am trying to do is get the values between the elements named username and password in the xml document which looks like this.

<?xml version ="1.0"?>

<users>
   <user>
      <name>Joshua</name>
      <username>user</username>
      <password>pass</password>
   </user>
</users>
[download]

Comment on How do I get the text value of an element using XML Parser? Select or Download Code

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Re: How do I get the text value of an element using XML Parser? by Anonymous Monk on Jan 26, 2002 at 08:01 UTC
ya gots to set up another handler, like the XML::Parser Tutorial demonstrates ;D #!/usr/bin/perl use strict; use warnings; use CGI qw ( :standard ); use Fcntl qw ( :flock ); use XML::Parser; use vars / $flag /; if (param) { my ($parser, $document, $users); open(USERS, "../../xml_final/users/users.xml") \|\| die "Could not open users.xml $!"; flock(USERS, LOCK_SH); print header; print start_html; $parser= new XML::Parser(); $parser->setHandlers( Start => \&start_handler, End => \&end_handler, Char => \&char_handler, ); $document = $parser->parse (\*USERS); close (USERS); sub char_handler{ my ($expat, $text) =@_; $main::username .= $text if $flag == 0; $main::password .= $text if $flag == 1; } sub start_handler{ my ($expat, $element, %attributes) =@_; if ($flag==0 && $element eq param("username")) { $flag=1; } if ($flag==1 && $element eq param("password")) { print p("Good Job"); } } [download]	[reply] [d/l]
Re: How do I get the text value of an element using XML Parser? by mirod (Canon) on Jan 26, 2002 at 13:51 UTC
Actually your best bet might be not to use XML::Parser at all, but to use a higher level (read easier-to-use) module. If your data is as simple as what you describe and the file is small enough that you can load it all in memory, which is likely, you can use XML::Simple: `#!/bin/perl -w use strict; use XML::Simple; # depends on XML::Parser use Data::Denter; # just to check what's read in by my $data= XMLin( \*DATA); # read the data, you would use "./$file" print Denter( $data), "\n"; # just checking __DATA__ <users> <user> <name>Joshua Kruck</name><username>krujos</username><password>jonn +y5</password> </user> <user> <name>John Doe</name><username>jdoe</username><password>jane</pass +word> </user> </users>` [download] Will give you the following output: `% user => % John Doe => % password => jane username => jdoe Joshua Kruck => % password => jonny5 username => krujos` [download] Read the docs as for example you might want the keys to the hash to be the username and not the name (use `keyattr => 'username'` when you call `XMLin`).	[reply] [d/l] [select]