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<?php
declare(strict_types=1);
namespace Cepis;
/**
* What a {@see Transport} hands back: an HTTP status, the response headers and
* the body as a string.
*
* Deliberately not a PSR-7 message. This library makes one GET and needs three
* things out of it; a plain value object keeps the {@see Transport} interface
* implementable in a few lines against whatever HTTP layer the host
* application already has.
*/
final class Response
{
/**
* @param array<string, string|list<string>> $headers Response headers.
* Keys may be in any case and values may be a single string or a list
* of them; {@see Response::header()} handles both, so an implementer
* can pass through whatever their HTTP layer produced.
*/
public function __construct(
public readonly int $status,
public readonly array $headers = [],
public readonly string $body = '',
) {
}
/**
* Look a header up case-insensitively, returning the first value or `null`
* when it is absent.
*/
public function header(string $name): ?string
{
foreach ($this->headers as $key => $value) {
if (strcasecmp((string) $key, $name) !== 0) {
continue;
}
if (is_array($value)) {
$value = $value[array_key_first($value)] ?? null;
}
return is_scalar($value) ? (string) $value : null;
}
return null;
}
}
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