使用HTML :: TreeBuilder从HTML中提取文本 - Perl

Question

我正在尝试访问.html文件并在<p>标签中提取文本.从逻辑上讲,我的代码应该可行.通过使用HTML :: TreeBuilder.我解析html然后<p>使用find_by_attribute("p")提取文本.但是我的脚本出现了空目录.我遗漏了什么吗？

#!/usr/bin/perl

use strict;
use HTML::TreeBuilder 3;
use FileHandle;

my @task = ('ar','cn','en','id','vn');

foreach my $lang (@task) {
mkdir "./extract_$lang", 0777 unless -d "./extract_$lang";
opendir (my $dir, "./$lang/") or die "$!";
my @files = grep (/\.html/,readdir ($dir));
closedir ($dir);

foreach my $file (@files) {
    open (my $fh, '<', "./$lang/$file") or die "$!";
    my $root = HTML::TreeBuilder->new;
    $root->parse_file("./$lang/$file");
    my @all_p = $root->find_by_attribute("p");
    foreach my $p (@all_p) {
        my $ptag = HTML::TreeBuilder->new_from_content ($p->as_HTML);
        my $filewrite = substr($file, 0, -5); 
        open (my $outwrite, '>>', "extract_$lang/$filewrite.txt") or die $!;
        print $outwrite $ptag->as_text . "\n";  
        my $pcontents = $ptag->as_text;
        print $pcontents . "\n";
        close (outwrite);
    }
close (FH);
}
}

我的.html文件是来自.asp网站的纯文本htmls,例如http://www.singaporemedicine.com/vn/hcp/med_evac_mtas.asp

我的.html文件保存在:

./ar/*
./cn/*
./en/*
./id/*
./vn/*

Answer 1

您将元素与属性混淆.该程序可以更简洁地编写:

#!/usr/bin/env perl
use strictures;
use File::Glob qw(bsd_glob);
use Path::Class qw(file);
use URI::file qw();
use Web::Query qw(wq);
use autodie qw(:all);

foreach my $lang (qw(ar cn en id vn)) {
    mkdir "./extract_$lang", 0777 unless -d "./extract_$lang";
    foreach my $file (bsd_glob "./$lang/*.html") {
        my $basename = file($file)->basename;
        $basename =~ s/[.]html$/.txt/;
        open my $out, '>>:encoding(UTF-8)', "./extract_$lang/$basename";
        $out->say($_) for wq(URI::file->new_abs($file))->find('p')->text;
        close $out;
    }
}