如何使 pQuery 能够处理格式稍有缺陷的 HTML？

发布于 2024-09-26 22:25:51 字数 674 浏览 4 评论 0原文

pQuery 是 jQuery JavaScript 框架到 Perl 的实用移植，可用于屏幕抓取。

pQuery 对格式错误的 HTML 非常敏感。考虑以下示例：

use pQuery;

my $html_malformed = "<html><head><title>foo</title></head><body>bar</body></html>>";
my $page = pQuery($html_malformed);
my $title = $page->find("title");
print "The title is: ", $title->html, "\n";

由于格式错误的 HTML 中存在双“>>”，pQuery 将找不到上例中的标题标记。

为了使基于 pQuery 的应用程序更能容忍格式错误的 HTML，我需要在将 HTML 传递给 pQuery 之前对其进行清理，以对其进行预处理。

从上面给出的代码片段开始，清理 HTML 使其能够被 pQuery 解析的最强大的纯 Perl 方法是什么？

原文

pQuery is a pragmatic port of the jQuery JavaScript framework to Perl which can be used for screen scraping.

pQuery quite sensitive to malformed HTML. Consider the following example:

use pQuery;

my $html_malformed = "<html><head><title>foo</title></head><body>bar</body></html>>";
my $page = pQuery($html_malformed);
my $title = $page->find("title");
print "The title is: ", $title->html, "\n";

pQuery won't find the title tag in the example above due to the double ">>" in the malformed HTML.

To make my pQuery based applications more tolerant to malformed HTML I need to pre-process the HTML by cleaning it up before passing it to pQuery.

Starting with the code fragment given above, what is the most robust pure-perl way to clean-up the HTML to make it parse:able by pQuery?

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牵你手 2024-10-03 22:25:51

我会将其报告为 pQuery 中的错误。这是一个解决方法：

use HTML::TreeBuilder;
use pQuery;

my $html_malformed = "<html><head><title>foo</title></head><body>bar</body></html>>";
my $html_cleaned = HTML::TreeBuilder->new_from_content($html_malformed);
my $page = pQuery($html_cleaned->as_HTML);
$html_cleaned->delete;
my $title = $page->find("title");
print "The title is: ", $title->html, "\n";

这没有多大意义，因为 pQuery 已经使用了 HTML::TreeBuilder 作为其底层解析机制，但它确实有效。

I'd report this as a bug in pQuery. Here's a workaround:

use HTML::TreeBuilder;
use pQuery;

my $html_malformed = "<html><head><title>foo</title></head><body>bar</body></html>>";
my $html_cleaned = HTML::TreeBuilder->new_from_content($html_malformed);
my $page = pQuery($html_cleaned->as_HTML);
$html_cleaned->delete;
my $title = $page->find("title");
print "The title is: ", $title->html, "\n";

This doesn't make a lot of sense, since pQuery already uses HTML::TreeBuilder as its underlying parsing mechanism, but it does work.

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