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<?php
/**
* High-performance PHP process supervisor and load balancer written in Go
*
* @author Alex Bond
*/
declare(strict_types=1);
namespace Spiral\RoadRunner;
final class HttpClient
{
/** @var Worker */
private $worker;
/**
* @param Worker $worker
*/
public function __construct(Worker $worker)
{
$this->worker = $worker;
}
/**
* @return Worker
*/
public function getWorker(): Worker
{
return $this->worker;
}
/**
* @return mixed[]|null Request information as ['ctx'=>[], 'body'=>string]
* or null if termination request or invalid context.
*/
public function acceptRequest(): ?array
{
$body = $this->getWorker()->receive($ctx);
if (empty($body) && empty($ctx)) {
// termination request
return null;
}
$ctx = json_decode($ctx, true);
if ($ctx === null) {
// invalid context
return null;
}
return ['ctx' => $ctx, 'body' => $body];
}
/**
* Send response to the application server.
*
* @param int $status Http status code
* @param string $body Body of response
* @param string[][] $headers An associative array of the message's headers. Each
* key MUST be a header name, and each value MUST be an array of strings
* for that header.
*/
public function respond(int $status, string $body, array $headers = []): void
{
$sendHeaders = empty($headers)
? new \stdClass() // this is required to represent empty header set as map and not as array
: $headers;
$this->getWorker()->send(
$body,
(string) json_encode(['status' => $status, 'headers' => $sendHeaders])
);
}
}
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