Re: XPath query issue...

I don't believe you:

use strict;
...
my $cve_id = 'CVE-2008-3763';
my $query = "/nvd/entry[@id = $cve_id]";
[download]

This code gives me:

Possible unintended interpolation of @id in string at tmp.pl line 3.
Global symbol "@id" requires explicit package name at tmp.pl line 3.
Execution of tmp.pl aborted due to compilation errors.
[download]

So you're either not using strict and warnings, or you're not posting the code you're running. Either way, I don't see how you expect us to help you, if you're not forthcoming about what you're actually doing.

Comment on Re: XPath query issue... Select or Download Code

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Re^2: XPath query issue... by bluescreen (Friar) on Sep 03, 2009 at 00:27 UTC
Did you try changing `my $query = "/nvd/entry[@id = $cve_id]";` [download] to: `my $query = "/nvd/entry[@id = '$cve_id']";` [download] And regarding a better parser it depends on how much information you want to read, XML::LibXML use a DOM Parser which builds a tree model for the document and then you can access that tree, the other standard parsing model is SAX which is based on events, and that is the fastest approach. Of course SAX parsers are much more complicated but in my experience it resulted on an improvement of 500%.	[reply] [d/l] [select]
Re^2: XPath query issue... by spstansbury (Monk) on Sep 02, 2009 at 18:21 UTC
Umm, that's the point - the code doesn't work - if it worked I wouldn't be asking how to fix it..	[reply]
Re^3: XPath query issue... by spstansbury (Monk) on Sep 02, 2009 at 18:31 UTC
The issue is just that - the @ is being interpreted as a global symbol and it should behave as a XPATH symbol signifying the attribute. `my $query = "/nvd/entry[@id = $cve_id]"; my $xp = XML::XPath-> new(filename => "$data_file"); foreach my $cve_entry ($xp->findnodes($query)) { }` [download]	[reply] [d/l]
Re^4: XPath query issue... by derby (Abbot) on Sep 02, 2009 at 19:11 UTC
You need to escape the @ somehow so perl does not try to interpolate it: `my $query = '/nvd/entry[@id = ' . $cve_id . ']';` [download] or `my $query = "/nvd/entry[\@id = $cve_id]";` [download] -derby	[reply] [d/l] [select]
Re^4: XPath query issue... by Corion (Patriarch) on Sep 02, 2009 at 19:21 UTC
... which is what both `use strict;` and `use warnings;` would have told you, if you had used them.	[reply] [d/l] [select]