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<?php declare (strict_types=1); namespace WPMailSMTP\Vendor\GuzzleHttp\Psr7; /** * @internal / final class Rfc7230 { /* * Header related regular expressions (based on amphp/http package) * * Note: header delimiter (\r\n) is modified to \r?\n to accept line feed only delimiters for BC reasons. * * @see https://github.com/amphp/http/blob/v1.0.1/src/Rfc7230.php#L12-L15 * * @license https://github.com/amphp/http/blob/v1.0.1/LICENSE / public const HEADER_REGEX = "(^([^()<>@,;:\\\"/[\\]?={}\x01- ]++):[ \t]+((?:[ \t]+[!-~\x80-\xff]++)+)[ \t]+\r?\n)m"; public const HEADER_FOLD_REGEX = "(\r?\n[ \t]++)"; /* * @return array{0: string, 1: int\|null}\|null */ public static function parseHostHeader(string $authority) : ?array { if ($authority === '') { return null; } $host = $authority; $port = null; if ($authority[0] === '[') { $closingBracket = \strpos($authority, ']'); if ($closingBracket === \false) { return null; } $host = \substr($authority, 0, $closingBracket + 1); $remainder = \substr($authority, $closingBracket + 1); if ($remainder !== '') { if ($remainder[0] !== ':') { return null; } $port = self::parseAuthorityPort(\substr($remainder, 1)); if ($port === null) { return null; } } } elseif (\false !== ($colon = \strpos($authority, ':'))) { $host = \substr($authority, 0, $colon); $port = self::parseAuthorityPort(\substr($authority, $colon + 1)); if ($port === null) { return null; } } if ($host === '' \|\| !self::isValidHostHeaderHost($host)) { return null; } return [$host, $port]; } private static function isValidHostHeaderHost(string $host) : bool { if (\preg_match('/[\\x00-\\x20\\x7F\\/\\?#@\\\\]/', $host)) { return \false; } if (\strpos($host, '[') !== \false \|\| \strpos($host, ']') !== \false) { if ($host[0] !== '[' \|\| \substr($host, -1) !== ']') { return \false; } $address = \substr($host, 1, -1); return \filter_var($address, \FILTER_VALIDATE_IP, \FILTER_FLAG_IPV6) !== \false \|\| \preg_match('/^v[0-9a-f]+\\.[' . Rfc3986::CHAR_UNRESERVED . Rfc3986::CHAR_SUB_DELIMS . ':]+$/iD', $address) === 1; } return \strpos($host, ':') === \false; } private static function parseAuthorityPort(string $port) : ?int { if ($port === '' \|\| !\ctype_digit($port)) { return null; } $normalized = \ltrim($port, '0'); if ($normalized === '') { return 0; } if (\strlen($normalized) > 5 \|\| (int) $normalized > 0xffff) { return null; } return (int) $normalized; } }

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