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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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final class Header |
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{ |
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/** |
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* Parse an array of header values containing ";" separated data into an |
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* array of associative arrays representing the header key value pair data |
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* of the header. When a parameter does not contain a value, but just |
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* contains a key, this function will inject a key with a '' string value. |
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* |
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* @param string|array $header Header to parse into components. |
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*/ |
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public static function parse($header) : array |
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{ |
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static $trimmed = "\"' \n\t\r"; |
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$params = $matches = []; |
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foreach ((array) $header as $value) { |
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foreach (self::splitList($value) as $val) { |
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$part = []; |
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foreach (\preg_split('/;(?=([^"]*"[^"]*")*[^"]*$)/', $val) ?: [] as $kvp) { |
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if (\preg_match_all('/<[^>]+>|[^=]+/', $kvp, $matches)) { |
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$m = $matches[0]; |
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if (isset($m[1])) { |
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$part[\trim($m[0], $trimmed)] = \trim($m[1], $trimmed); |
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} else { |
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$part[] = \trim($m[0], $trimmed); |
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} |
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} |
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} |
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if ($part) { |
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$params[] = $part; |
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} |
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} |
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} |
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return $params; |
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} |
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/** |
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* Converts an array of header values that may contain comma separated |
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* headers into an array of headers with no comma separated values. |
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* |
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* @param string|array $header Header to normalize. |
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* |
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* @deprecated Use self::splitList() instead. |
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*/ |
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public static function normalize($header) : array |
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{ |
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$result = []; |
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foreach ((array) $header as $value) { |
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foreach (self::splitList($value) as $parsed) { |
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$result[] = $parsed; |
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} |
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} |
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return $result; |
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} |
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/** |
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* Splits a HTTP header defined to contain a comma-separated list into |
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* each individual value. Empty values will be removed. |
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* |
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* Example headers include 'accept', 'cache-control' and 'if-none-match'. |
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* |
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* This method must not be used to parse headers that are not defined as |
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* a list, such as 'user-agent' or 'set-cookie'. |
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* |
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* @param string|string[] $values Header value as returned by MessageInterface::getHeader() |
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* |
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* @return string[] |
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*/ |
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public static function splitList($values) : array |
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{ |
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if (!\is_array($values)) { |
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$values = [$values]; |
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} |
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$result = []; |
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foreach ($values as $value) { |
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if (!\is_string($value)) { |
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throw new \TypeError('$header must either be a string or an array containing strings.'); |
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} |
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$v = ''; |
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$isQuoted = \false; |
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$isEscaped = \false; |
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for ($i = 0, $max = \strlen($value); $i < $max; ++$i) { |
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if ($isEscaped) { |
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$v .= $value[$i]; |
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$isEscaped = \false; |
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continue; |
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} |
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if (!$isQuoted && $value[$i] === ',') { |
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$v = \trim($v); |
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if ($v !== '') { |
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$result[] = $v; |
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} |
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$v = ''; |
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continue; |
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} |
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if ($isQuoted && $value[$i] === '\\') { |
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$isEscaped = \true; |
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$v .= $value[$i]; |
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continue; |
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} |
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if ($value[$i] === '"') { |
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$isQuoted = !$isQuoted; |
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$v .= $value[$i]; |
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continue; |
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} |
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$v .= $value[$i]; |
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} |
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$v = \trim($v); |
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if ($v !== '') { |
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$result[] = $v; |
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} |
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} |
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return $result; |
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} |
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} |
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