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Парсинг XML - IV
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#!/usr/bin/perl | |
# ------------------------------------------------------------------------------ | |
# Напишите скрипт, получающий в качестве параметра путь к XML-файлу и выдающий | |
# на STDOUT следующее: | |
# * суммарное число букв внутри тегов, не включая пробельные символы | |
# (<aaa dd="ddd">text</aaa> - четыре буквы) | |
# * суммарное число букв нормализованного текста внутри тегов, включая пробелы | |
# * число внутренних ссылок (теги <a href="#id">) | |
# * число битых внутренних ссылок (ссылки на несуществующие ID элементов) | |
# ------------------------------------------------------------------------------ | |
use Const::Fast; | |
use Modern::Perl; | |
use Number::Format qw/format_number/; | |
use XML::Parser; | |
use utf8; | |
use open qw/:std :utf8/; | |
# ------------------------------------------------------------------------------ | |
const my %TEXT_TAGS => ( | |
p => 1, | |
); | |
my ( $chars, $all_chars, %id, @href ) = ( 0, 0 ); | |
XML::Parser->new( | |
Handlers => { | |
Start => \&handle_start, | |
End => \&handle_end, | |
Char => \&handle_char, | |
} | |
)->parsefile( @ARGV ? $ARGV[0] : 'test.xml' );; | |
say 'All characters : ' . format_number($all_chars); | |
say 'Non-whitespace characters : ' . format_number($chars); | |
say 'Internal links : ' . format_number( scalar @href ); | |
my $errors = 0; | |
for (@href) { | |
++$errors unless exists $id{$_}; | |
} | |
say 'Broken links : ' . format_number($errors) if $errors; | |
my @current_tag; | |
# ------------------------------------------------------------------------------ | |
sub handle_start { | |
my ( undef, $tag, %attr ) = @_; | |
push @current_tag, $tag; | |
$id{ q{#}. $attr{id} } = 1 if exists $attr{id}; | |
if ( $tag eq 'a' ) { | |
while ( my ( $key, $val ) = each %attr ) { | |
$key =~ s/^[^:]*?://sm; | |
if ( $key eq 'href' ) { | |
if ( index( $val, q{#} ) == 0 ) { | |
push @href, $val; | |
last; | |
} | |
} | |
} | |
} | |
} | |
# ------------------------------------------------------------------------------ | |
sub handle_end { | |
pop @current_tag; | |
} | |
# ------------------------------------------------------------------------------ | |
sub handle_char { | |
my ( undef, $text ) = @_; | |
if ( $text && $current_tag[-1] && exists $TEXT_TAGS{ $current_tag[-1] } ) { | |
$all_chars += length $text; | |
$text =~ s/\s+//gsm; | |
$chars += length $text; | |
} | |
} | |
# ----------------------------------------------------------------------------- | |
# That's All, Folks! | |
# ----------------------------------------------------------------------------- |
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