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package WWW::Webrobot::UseXPath; |
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use strict; |
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use warnings; |
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# Author: Stefan Trcek |
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# Copyright(c) 2004 ABAS Software AG |
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use UNIVERSAL qw(isa); # *isa = \&UNIVERSAL::isa; |
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use XML::XPath; |
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use XML::XPath::XMLParser; |
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=head1 NAME |
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WWW::Webrobot::UseXPath - Apply XPath expressions to an xml string |
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=head1 SYNOPSIS |
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use WWW::Webrobot::UseXPath; |
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WWW::Webrobot::UseXPath -> new($xml) -> extract($xpath_expression); |
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=head1 DESCRIPTION |
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Apply XPath expressions to an xml string. |
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=head1 METHODS |
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=over |
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=item WWW::Webrobot::UseXPath -> new ($xml) |
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Allocate an XPath object for the xml-string $xml |
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=cut |
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sub new { |
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my ($proto, $xml) = @_; |
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my $self = { |
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_xml => $xml, |
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_xpath => XML::XPath -> new(xml => $xml), |
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}; |
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return bless ($self, ref($proto) || $proto); |
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} |
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=item $self -> extract ($expr) |
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Apply an xpath expression $expr for this object. |
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The result is of type string. |
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=cut |
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sub extract { |
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my ($self, $expr) = @_; |
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my $node = eval { |
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$self -> {_xpath} -> find($expr); |
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}; |
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return undef if $@; |
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my $ret = ""; |
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if ($node -> isa("XML::XPath::NodeSet")) { |
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$ret = join "\n", map { XML::XPath::XMLParser::as_string($_) } $node -> get_nodelist(); |
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} |
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else { |
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$ret = $node -> value(); |
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} |
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return $ret; |
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} |
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=back |
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=cut |
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1; |