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