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<?php |
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|
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declare (strict_types=1); |
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namespace WCPOS\Vendor\GuzzleHttp\Psr7; |
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|
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final class Header |
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{ |
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private function __construct() |
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{ |
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} |
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/** |
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* Parses semicolon-separated header parameters into associative arrays, one |
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* per comma-separated header value. Parameters without a value are appended |
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* as values under integer keys. |
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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 (self::splitParameters($val) as $kvp) { |
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$count = \preg_match_all('/<[^>]+>|[^=]+/', $kvp, $matches); |
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if ($count === \false) { |
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throw new \RuntimeException('Unable to parse header parameters: ' . \preg_last_error_msg()); |
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} |
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if ($count !== 0) { |
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$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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* Split a header value into semicolon-separated parameters. |
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* |
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* @return string[] |
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*/ |
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private static function splitParameters(string $value) : array |
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{ |
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$values = []; |
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$start = 0; |
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$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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$char = $value[$i]; |
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if ($isEscaped) { |
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$isEscaped = \false; |
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continue; |
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} |
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if ($isQuoted && $char === '\\') { |
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$isEscaped = \true; |
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continue; |
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} |
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if ($char === '"') { |
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$isQuoted = !$isQuoted; |
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continue; |
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} |
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if (!$isQuoted && $char === ';') { |
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$values[] = \substr($value, $start, $i - $start); |
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$start = $i + 1; |
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} |
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} |
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$values[] = \substr($value, $start); |
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return $values; |
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} |
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/** |
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* Splits an HTTP header defined to contain a comma-separated list into each |
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* individual value. Empty values are 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 a |
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* list, such as `user-agent` or `set-cookie`. |
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* |
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* @param string|string[] $values Header value as returned by |
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* MessageInterface::getHeader() |
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* |
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* @return string[] |
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*/ |
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public static function splitList($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, " \t\n\r"); |
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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, " \t\n\r"); |
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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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|
