xpath invalid expression

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

Hello, I got xpath invalid expression error message in the code below

 
my @nodes = $doc->findnodes("/feed/doc/title[text( )=$t]/ancestor::fee
+d/doc/abstract/text( )");
foreach my $node (@nodes) {
  #print $node->data, "\n";
  print $t2, ": ", $node->firstChild->data, "\n\n";
}
[download]

I got the error message when $t string variable includes a colon ":" and when it does not include colon the script work fine. How could I escape from this error. Thanks.

Motaz

Comment on xpath invalid expression Download Code

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Re: xpath invalid expression by Anonymous Monk on Jan 12, 2012 at 12:10 UTC
quote or escape $t , so your xpath doesn't break `{ my %rep = qw{ " " ' ' } ; sub quote_xpath { my( $t ) = @_; $t =~ s/(['"])/ $rep{$1} /ge; return $t; } }` [download] See also xpath resources 1, xpath resources 2, http://www.w3.org/TR/xpath/	[reply] [d/l]
Re: xpath invalid expression by i5513 (Pilgrim) on Jan 12, 2012 at 12:06 UTC
Did you test it enclosing $t with '? Regards	[reply]