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Fix discarding html[lang]

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`DOMDocument::loadHTML` will parse HTML documents as ISO-8859-1 if there is no `meta[charset]` tag. This means that UTF-8-encoded HTML fragments such as those coming from JSON-LD `articleBody` field would be parsed with incorrect encoding.

In f14428e4c0, we tried to resolve it by putting `meta[charset]` tag at the start of the HTML fragment. Unfortunately, it turns out that causes parser to auto-insert a `html` element, losing the attributes of the original `html` tag.

Let’s try to insert the `meta[charset]` tag into the proper place in the HTML document.

We do not need to use the same trick with `JSLikeHTMLElement::__set`.
That expects smaller HTML fragments, not `html` documents, so creating `html` and `head` elements will not be a problem.

(cherry picked from commit efbbc86df9)

Had to strip type hints since we still target PHP 5.6.
This commit is contained in:
Jan Tojnar
2025-03-04 01:59:42 +01:00
parent 5afefcff34
commit f1c6297e3c
2 changed files with 84 additions and 1 deletions
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tests/ReadabilityTest.php
+42
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@@ -486,6 +486,48 @@ class ReadabilityTest extends \PHPUnit\Framework\TestCase
$this->assertStringContainsString('<a href="alice-I.html">Down the Rabbit-Hole</a>', $readability->getContent()->getInnerHtml());
}
/**
* @return array<string, array{0: string, 1: string, 2?: bool}>
*/
public function dataForHtmlLang()
{
return [
'meta' => [
'<html lang="fr"><head><meta charset="utf-8"></head><body><article>' . str_repeat('<p>This is the awesome content :)</p>', 7) . '</article></body></html>',
'fr',
],
'head' => [
'<html lang="fr"><head><title>Foo</title></head><body><article>' . str_repeat('<p>This is the awesome content :)</p>', 7) . '</article></body></html>',
'fr',
],
'headless' => [
'<html lang="fr"><body><article>' . str_repeat('<p>This is the awesome content :)</p>', 7) . '</article></body></html>',
'fr',
// tidy would add <head> tag.
false,
],
'fragment' => [
'<article>' . str_repeat('<p>This is the awesome content :)</p>', 7) . '</article>',
'',
// tidy would add <html>.
false,
],
];
}
/**
* @dataProvider dataForHtmlLang
*/
public function testHtmlLang($html, $lang, $useTidy = true)
{
$readability = $this->getReadability($html, 'http://0.0.0.0', 'libxml', $useTidy);
$res = $readability->init();
$this->assertTrue($res);
$this->assertInstanceOf(\DOMDocument::class, $readability->dom);
$this->assertSame($lang, $readability->dom->documentElement->getAttribute('lang'));
}
private function getReadability($html, $url = null, $parser = 'libxml', $useTidy = true)
{
$readability = new Readability($html, $url, $parser, $useTidy);