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<?php declare (strict_types=1); namespace Smush_Vendor\GuzzleHttp\Psr7; final class Header { /** * Parse an array of header values containing ";" separated data into an * array of associative arrays representing the header key value pair data * of the header. When a parameter does not contain a value, but just * contains a key, this function will inject a key with a '' string value. * * @param string\|array $header Header to parse into components. / public static function parse($header) : array { static $trimmed = "\"' \n\t\r"; $params = $matches = []; foreach ((array) $header as $value) { foreach (self::splitList($value) as $val) { $part = []; foreach (\preg_split('/;(?=([^"]"[^"]")[^"]$)/', $val) ?: [] as $kvp) { if (\preg_match_all('/<[^>]+>\|[^=]+/', $kvp, $matches)) { $m = $matches[0]; if (isset($m[1])) { $part[\trim($m[0], $trimmed)] = \trim($m[1], $trimmed); } else { $part[] = \trim($m[0], $trimmed); } } } if ($part) { $params[] = $part; } } } return $params; } /* * Converts an array of header values that may contain comma separated * headers into an array of headers with no comma separated values. * * @param string\|array $header Header to normalize. * * @deprecated Use self::splitList() instead. / public static function normalize($header) : array { $result = []; foreach ((array) $header as $value) { foreach (self::splitList($value) as $parsed) { $result[] = $parsed; } } return $result; } /* * Splits a HTTP header defined to contain a comma-separated list into * each individual value. Empty values will be removed. * * Example headers include 'accept', 'cache-control' and 'if-none-match'. * * This method must not be used to parse headers that are not defined as * a list, such as 'user-agent' or 'set-cookie'. * * @param string\|string[] $values Header value as returned by MessageInterface::getHeader() * * @return string[] */ public static function splitList($values) : array { if (!\is_array($values)) { $values = [$values]; } $result = []; foreach ($values as $value) { if (!\is_string($value)) { throw new \TypeError('$header must either be a string or an array containing strings.'); } $v = ''; $isQuoted = \false; $isEscaped = \false; for ($i = 0, $max = \strlen($value); $i < $max; ++$i) { if ($isEscaped) { $v .= $value[$i]; $isEscaped = \false; continue; } if (!$isQuoted && $value[$i] === ',') { $v = \trim($v); if ($v !== '') { $result[] = $v; } $v = ''; continue; } if ($isQuoted && $value[$i] === '\\') { $isEscaped = \true; $v .= $value[$i]; continue; } if ($value[$i] === '"') { $isQuoted = !$isQuoted; $v .= $value[$i]; continue; } $v .= $value[$i]; } $v = \trim($v); if ($v !== '') { $result[] = $v; } } return $result; } }

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