Question

民间，

HTML :: Treebuilder上有很多信息我很惊讶我找不到答案，希望我不会错过它。

我想要做的只是在父节点之间进行解析，所以给出一个像这样的html文档

<html>
<body>
   <a id="111" name="111"></a>
   <p>something</p>
   <p>something</p>
   <p>something</p>
   <a href=xxx">something</a>
   <a id="222" name="222"></a>
   <p>something</p>
   <p>something</p>
   <p>something</p>
   ....
 </body>
 </html>

我希望能够获得有关第一个锚标记（111）的信息，然后处理3个p标记，然后获取下一个锚标记（222），然后处理那些p标记等等。

很容易找到每个锚标记

use HTML::TreeBuilder;
my $tree = HTML::TreeBuilder->new();
$tree->parse_file("index-01.htm");
foreach my $atag ( $tree->look_down( '_tag', 'a' ) ) {
    if ($atag->attr('id')) {
        # Found 'a' tag, now process the p tags until the next 'a'
    }
}

但是一旦我找到该标签，我如何获得所有p标签，直到下一个锚点？

TIA !!

Answer 1

HTML :: TreeBuilder版本

#!/usr/bin/perl

use strict; use warnings;
use HTML::TreeBuilder;

my $tree = HTML::TreeBuilder->new;

$tree->parse_file(\*DATA);
$tree->elementify;
$tree->objectify_text;

foreach my $atag ( $tree->look_down( '_tag', 'a' ) ) {
    if ($atag->attr('id')) {
        printf "Found %s\n", $atag->as_XML;
        process_p( $atag );
    }
}

sub process_p {
    my ($tag) = @_;
    while ( defined( $tag ) and defined( my $next = $tag->right ) ) {
        last if lc $next->tag eq 'a';
        if ( lc $next->tag eq 'p') {
            $next->deobjectify_text;
            print $next->as_text, "\n";
        }
        $tag = $next;
    }
}

__DATA__
<html>
<body>
   <a id="111" name="111"></a>
   <p>something</p>
   <p>something</p>
   <p>something</p>sometext
   <a href=xxx">something</a>
   <a id="222" name="222"></a>
   <p>something</p>
   <p>something</p>
   <p>something</p>
 </body>
 </html>

输出：

Found <a id="111" name="111"></a>

something
something
something
Found <a id="222" name="222"></a>

something
something
something

HTML :: TokeParser ::简易版

#!/usr/bin/perl

use strict; use warnings;
use HTML::TokeParser::Simple;

my $parser = HTML::TokeParser::Simple->new(\*DATA);

while ( my $tag = $parser->get_tag('a') ) {
    next unless $tag->get_attr('id');
    printf "Found %s\n", $tag->as_is;
    process_p($parser);
}

sub process_p {
    my ($parser) = @_;
    while ( my $next = $parser->get_token ) {
        if ( $next->is_start_tag('a') ) {
            $parser->unget_token($next);
            return;
        }
        elsif ( $next->is_start_tag('p') ) {
            print $parser->get_text('/p'), "\n";
        }
    }
    return;
}

输出：

Found <a id="111" name="111">
something
something
something
Found <a id="222" name="222">
something
something
something

HTML :: Treebuilder - 父母之间的解析

1 个答案:

HTML :: TreeBuilder版本

HTML :: TokeParser ::简易版