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Replace HTML regular expression by HTML::extractCharset in ParseUrl::getSiteInfo 

- Address https://github.com/friendica/friendica/issues/12488#issuecomment-1374537440
This commit is contained in:
Hypolite Petovan 2023-01-10 01:08:34 -05:00
parent 5e2b655b43
commit 3fcafd1d50
1 changed files with 11 additions and 19 deletions
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26
src/Util/ParseUrl.php
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@ -24,6 +24,8 @@ namespace Friendica\Util;
use DOMDocument;
use DOMXPath;
use Friendica\Content\OEmbed;
use Friendica\Content\Text\HTML;
use Friendica\Protocol\HTTP\MediaType;
use Friendica\Core\Hook;
use Friendica\Core\Logger;
use Friendica\Database\Database;
@ -283,25 +285,13 @@ class ParseUrl
}
$charset = '';
try {
// Look for a charset, first in headers
// Expected form: Content-Type: text/html; charset=ISO-8859-4
if (preg_match('/charset=([a-z0-9-_.\/]+)/i', $curlResult->getContentType(), $matches)) {
$charset = trim(trim(trim(array_pop($matches)), ';,'));
} else {
// Then in body that gets precedence
// Expected forms:
// - <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
// - <meta charset="utf-8">
// - <meta charset=utf-8>
// - <meta charSet="utf-8">
// We escape <style> and <script> tags since they can contain irrelevant charset information
// (see https://github.com/friendica/friendica/issues/9251#issuecomment-698636806)
Strings::performWithEscapedBlocks($body, '#<(?:style|script).*?</(?:style|script)>#ism', function ($body) use (&$charset) {
if (preg_match('/charset=["\']?([a-z0-9-_.\/]+)/i', $body, $matches)) {
$charset = trim(trim(trim(array_pop($matches)), ';,'));
}
});
$mediaType = MediaType::fromContentType($curlResult->getContentType());
if (isset($mediaType->parameters['charset'])) {
$charset = $mediaType->parameters['charset'];
}
} catch(\InvalidArgumentException $e) {}
$siteinfo['charset'] = $charset;
@ -322,6 +312,8 @@ class ParseUrl
$doc = new DOMDocument();
@$doc->loadHTML($body);
$siteinfo['charset'] = HTML::extractCharset($doc) ?? $siteinfo['charset'];
XML::deleteNode($doc, 'style');
XML::deleteNode($doc, 'option');
XML::deleteNode($doc, 'h1');