__ __ __ __ _____ _ _ _____ _ _ _
| \/ | \ \ / / | __ \ (_) | | / ____| | | | |
| \ / |_ __\ V / | |__) | __ ___ ____ _| |_ ___ | (___ | |__ ___| | |
| |\/| | '__|> < | ___/ '__| \ \ / / _` | __/ _ \ \___ \| '_ \ / _ \ | |
| | | | |_ / . \ | | | | | |\ V / (_| | || __/ ____) | | | | __/ | |
|_| |_|_(_)_/ \_\ |_| |_| |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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<?php
namespace GuzzleHttp\Handler;
use GuzzleHttp\Utils;
/**
* @internal
*/
final class HeaderProcessor
{
/**
* Returns the HTTP version, status code, reason phrase, and headers.
*
* @param string[] $headers
*
* @return array{0:string, 1:int, 2:?string, 3:array}
*
* @throws \RuntimeException
*/
public static function parseHeaders(array $headers): array
{
if ($headers === []) {
throw new \RuntimeException('Expected a non-empty array of header data');
}
$headers = self::getLastHeaderBlock(\array_values($headers));
$statusLine = \array_shift($headers);
if ($statusLine === null) {
throw new \RuntimeException('Expected a non-empty array of header data');
}
$parts = \explode(' ', $statusLine, 3);
$version = \explode('/', $parts[0])[1] ?? null;
if ($version === null) {
throw new \RuntimeException('HTTP version missing from header data');
}
$status = $parts[1] ?? null;
if ($status === null) {
throw new \RuntimeException('HTTP status code missing from header data');
}
if (!\preg_match('/^\d{3}$/', $status)) {
throw new \RuntimeException('HTTP status code is invalid');
}
foreach ($headers as $header) {
if (\strpos($header, ':') === false) {
throw new \RuntimeException('HTTP header line is invalid');
}
}
return [$version, (int) $status, $parts[2] ?? null, Utils::headersFromLines($headers)];
}
/**
* @param non-empty-list<string> $headers
*
* @return list<string>
*/
private static function getLastHeaderBlock(array $headers): array
{
$lastStatusLine = 0;
foreach ($headers as $index => $line) {
if (\preg_match('/^HTTP\/\S+\s+/i', $line)) {
$lastStatusLine = $index;
}
}
return \array_slice($headers, $lastStatusLine);
}
}