02-28-2012
Extract strings within XML file between different delimiters
Good afternoon!
I have an XML file from which I want to extract only certain elements contained within each line. The problem is that the format of each line is not exactly the same (though similiar). For example, oa_var will be in each line, however, there may be no value or other variables present in some lines (but not others).
So, given the example lines below:
<ex1 oa_var="some_var_name1">val1</ex1>
<ex2 oa_var="some_var_name2" abc="dont_care">val2</ex2>
<ex3 oa_var="some_var_name3" />
<ex4 oa_var="some_var_name4">val4</ex4>
I want to only extract the bolded items (note ex3 doesn't have a value).
some_var_name1 val1
some_var_name2 val2
some_var_name3
some_var_name4 val4
I am open to using shell | awk | sed | perl | python (in that order).
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LEARN ABOUT REDHAT
cgi::pretty
CGI::Pretty(3pm) Perl Programmers Reference Guide CGI::Pretty(3pm)
NAME
CGI::Pretty - module to produce nicely formatted HTML code
SYNOPSIS
use CGI::Pretty qw( :html3 );
# Print a table with a single data element
print table( TR( td( "foo" ) ) );
DESCRIPTION
CGI::Pretty is a module that derives from CGI. It's sole function is to allow users of CGI to output nicely formatted HTML code.
When using the CGI module, the following code:
print table( TR( td( "foo" ) ) );
produces the following output:
<TABLE><TR><TD>foo</TD></TR></TABLE>
If a user were to create a table consisting of many rows and many columns, the resultant HTML code would be quite difficult to read since
it has no carriage returns or indentation.
CGI::Pretty fixes this problem. What it does is add a carriage return and indentation to the HTML code so that one can easily read it.
print table( TR( td( "foo" ) ) );
now produces the following output:
<TABLE>
<TR>
<TD>
foo
</TD>
</TR>
</TABLE>
Tags that won't be formatted
The <A> and <PRE> tags are not formatted. If these tags were formatted, the user would see the extra indentation on the web browser caus-
ing the page to look different than what would be expected. If you wish to add more tags to the list of tags that are not to be touched,
push them onto the @AS_IS array:
push @CGI::Pretty::AS_IS,qw(CODE XMP);
Customizing the Indenting
If you wish to have your own personal style of indenting, you can change the $INDENT variable:
$CGI::Pretty::INDENT = " ";
would cause the indents to be two tabs.
Similarly, if you wish to have more space between lines, you may change the $LINEBREAK variable:
$CGI::Pretty::LINEBREAK = "
";
would create two carriage returns between lines.
If you decide you want to use the regular CGI indenting, you can easily do the following:
$CGI::Pretty::INDENT = $CGI::Pretty::LINEBREAK = "";
BUGS
This section intentionally left blank.
AUTHOR
Brian Paulsen <Brian@ThePaulsens.com>, with minor modifications by Lincoln Stein <lstein@cshl.org> for incorporation into the CGI.pm dis-
tribution.
Copyright 1999, Brian Paulsen. All rights reserved.
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Bug reports and comments to Brian@ThePaulsens.com. You can also write to lstein@cshl.org, but this code looks pretty hairy to me and I'm
not sure I understand it!
SEE ALSO
CGI
perl v5.8.0 2002-06-01 CGI::Pretty(3pm)