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<?php |
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namespace YoastSEO_Vendor\GuzzleHttp\Handler; |
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|
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use YoastSEO_Vendor\GuzzleHttp\Utils; |
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/** |
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* @internal |
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*/ |
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final class HeaderProcessor |
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{ |
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/** |
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* Returns the HTTP version, status code, reason phrase, and headers. |
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* |
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* @param string[] $headers |
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* |
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* @return array{0:string, 1:int, 2:?string, 3:array} |
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* |
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* @throws \RuntimeException |
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*/ |
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public static function parseHeaders(array $headers) : array |
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{ |
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if ($headers === []) { |
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throw new \RuntimeException('Expected a non-empty array of header data'); |
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} |
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$headers = self::getLastHeaderBlock(\array_values($headers)); |
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$statusLine = \array_shift($headers); |
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if ($statusLine === null) { |
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throw new \RuntimeException('Expected a non-empty array of header data'); |
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} |
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$parts = \explode(' ', $statusLine, 3); |
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$version = \explode('/', $parts[0])[1] ?? null; |
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if ($version === null) { |
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throw new \RuntimeException('HTTP version missing from header data'); |
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} |
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$status = $parts[1] ?? null; |
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if ($status === null) { |
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throw new \RuntimeException('HTTP status code missing from header data'); |
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} |
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if (!\preg_match('/^\\d{3}$/D', $status)) { |
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throw new \RuntimeException('HTTP status code is invalid'); |
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} |
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foreach ($headers as $header) { |
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if (\strpos($header, ':') === \false) { |
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throw new \RuntimeException('HTTP header line is invalid'); |
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} |
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} |
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return [$version, (int) $status, $parts[2] ?? null, \YoastSEO_Vendor\GuzzleHttp\Utils::headersFromLines($headers)]; |
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} |
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public static function isStatusLineCandidate(string $line) : bool |
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{ |
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return \preg_match('/^HTTP\\/[0-9]+(?:\\.[0-9]+)? [0-9]{3}(?: [^\\r\\n]*)?(?:\\r\\n|\\r|\\n)?$/iD', $line) === 1; |
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} |
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public static function isValidHeaderFieldLine(string $line) : bool |
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{ |
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$parts = \explode(':', $line, 2); |
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if (!isset($parts[1])) { |
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return \false; |
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} |
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if (!\preg_match('/^[a-zA-Z0-9\'`#$%&*+.^_|~!-]+$/D', $parts[0])) { |
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return \false; |
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} |
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return \preg_match('/^[\\x20\\x09\\x21-\\x7E\\x80-\\xFF]*(?:\\r\\n|\\r|\\n)?$/D', \trim($parts[1], " \t")) === 1; |
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} |
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/** |
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* @param non-empty-list<string> $headers |
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* |
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* @return list<string> |
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*/ |
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private static function getLastHeaderBlock(array $headers) : array |
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{ |
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$lastStatusLine = 0; |
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foreach ($headers as $index => $line) { |
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if (self::isStatusLineCandidate($line)) { |
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$lastStatusLine = $index; |
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} |
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} |
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return \array_slice($headers, $lastStatusLine); |
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} |
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} |
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