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<?php |
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/* |
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* This file is part of dispositif/wikibot application (@github) |
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* 2019-2023 © Philippe M./Irønie <[email protected]> |
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* For the full copyright and MIT license information, view the license file. |
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*/ |
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declare(strict_types=1); |
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namespace App\Application\Utils; |
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use DomainException; |
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use Normalizer; |
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use Throwable; |
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class HttpUtil |
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{ |
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/** |
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* Better than filter_var($url, FILTER_VALIDATE_URL) because it's not multibyte capable. |
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* See for example .中国 domain name |
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*/ |
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public static function isHttpURL(string $url): bool |
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{ |
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return (bool) preg_match('#^https?://[^ \n\t\r]+$#i', $url); |
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} |
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/** |
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* Normalize and converting to UTF-8 encoding |
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*/ |
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public static function normalizeHtml(string $html, ?string $url = ''): ?string |
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{ |
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if (empty($html)) { |
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return $html; |
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} |
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$html2 = Normalizer::normalize($html); |
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if (is_string($html2) && !empty($html2)) { |
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return $html2; |
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} |
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$charset = self::extractCharset($html) ?? 'WINDOWS-1252'; |
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if (empty($charset)) { |
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throw new DomainException('normalized html error and no charset found : ' . $url); |
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} |
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try { |
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// PHP Notice: iconv(): Detected an illegal character in input string |
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$html2 = @iconv($charset, 'UTF-8//TRANSLIT', $html); |
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if (false === $html2) { |
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throw new DomainException("error iconv : $charset to UTF-8 on " . $url); |
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} |
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$html2 = Normalizer::normalize($html2); |
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if (!is_string($html2)) { |
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throw new DomainException("error normalizer : $charset to UTF-8 on " . $url); |
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} |
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} catch (Throwable $e) { |
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throw new DomainException("error converting : $charset to UTF-8 on " . $url, $e->getCode(), $e); |
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} |
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return $html2; |
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} |
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/** |
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* Extract charset from HTML text |
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*/ |
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private static function extractCharset(string $html): ?string |
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{ |
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if (preg_match( |
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'#<meta(?!\s*(?:name|value)\s*=)(?:[^>]*?content\s*=[\s"\']*)?([^>]*?)[\s"\';]*charset\s*=[\s"\']*([^\s"\'/>]*)#', |
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$html, |
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$matches |
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) |
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) { |
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$charset = $matches[2] ?? $matches[1] ?? null; |
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} |
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if (empty($charset)) { |
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$encoding = mb_detect_encoding($html, null, true); |
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$charset = is_string($encoding) ? strtoupper($encoding) : null; |
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} |
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return $charset; |
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} |
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} |
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Dispositif /
Wikibot
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