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Top Forums Shell Programming and Scripting Grab XML attributes from file with bash script Post 303045636 by joddclaude on Sunday 5th of April 2020 08:15:48 AM
Old 04-05-2020
Grab XML attributes from file with bash script

Hi,

I need to grab attributes from the XML file with pure bash script.

So I have the following XML file with a root element `Group` and lots of `Person` elements, every of them has `id` and `username` attributes. `id` is unique value for each element:

Code:
<?xml version="1.0" encoding="UTF-8"?>
<Group id="RW_8987"
       dept_id="D_12"
       main="false">

    <Person id="P_0001"
            email="email0001@example.com"
            username="person_0001"
            password="pass_0001"/>

    <Person id="P_0002"
            email="email0002@example.com"
            username="person_0002"
            password="pass_0002"/>

    <!--  ...  -->
</Group>

And I need to use bash script to extract the `id` and `username` attributes into some key-value structure:

Code:
P_0001=person_0001
P_0002=person_0002

Checked other related answers, but most of them suggest to use some XML parsers like xmllint. But unfortunately I do not have them on the target machine.

Can you kindly suggest what how I can achieve this. Thanks in advance.
 

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SAX::PurePerl(3)					User Contributed Perl Documentation					  SAX::PurePerl(3)

NAME
XML::SAX::PurePerl - Pure Perl XML Parser with SAX2 interface SYNOPSIS
use XML::Handler::Foo; use XML::SAX::PurePerl; my $handler = XML::Handler::Foo->new(); my $parser = XML::SAX::PurePerl->new(Handler => $handler); $parser->parse_uri("myfile.xml"); DESCRIPTION
This module implements an XML parser in pure perl. It is written around the upcoming perl 5.8's unicode support and support for multiple document encodings (using the PerlIO layer), however it has been ported to work with ASCII/UTF8 documents under lower perl versions. The SAX2 API is described in detail at http://sourceforge.net/projects/perl-xml/, in the CVS archive, under libxml-perl/docs. Hopefully those documents will be in a better location soon. Please refer to the SAX2 documentation for how to use this module - it is merely a front end to SAX2, and implements nothing that is not in that spec (or at least tries not to - please email me if you find errors in this implementation). BUGS
XML::SAX::PurePerl is slow. Very slow. I suggest you use something else in fact. However it is great as a fallback parser for XML::SAX, where the user might not be able to install an XS based parser or C library. Currently lots, probably. At the moment the weakest area is parsing DOCTYPE declarations, though the code is in place to start doing this. Also parsing parameter entity references is causing me much confusion, since it's not exactly what I would call trivial, or well documented in the XML grammar. XML documents with internal subsets are likely to fail. I am however trying to work towards full conformance using the Oasis test suite. AUTHOR
Matt Sergeant, matt@sergeant.org. Copyright 2001. Please report all bugs to the Perl-XML mailing list at perl-xml@listserv.activestate.com. LICENSE
This is free software. You may use it or redistribute it under the same terms as Perl 5.7.2 itself. perl v5.18.2 2011-09-04 SAX::PurePerl(3)
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