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<?php |
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declare(strict_types=1); |
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/** |
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* High-performance PHP process supervisor and load balancer written in Go |
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* |
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* @author Alex Bond |
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*/ |
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namespace Spiral\RoadRunner; |
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use ReflectionFunction; |
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class HttpClient |
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{ |
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/** @var Worker */ |
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private $worker; |
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/** @var []callable Array of termination event listeners */ |
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private $terminationListeners = []; |
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/** |
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* @param Worker $worker |
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*/ |
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public function __construct(Worker $worker) |
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{ |
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$this->worker = $worker; |
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} |
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/** |
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* @return Worker |
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*/ |
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public function getWorker(): Worker |
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{ |
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return $this->worker; |
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} |
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/** |
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* @return array|null Request information as ['ctx'=>[], 'body'=>string] or null if termination request or invalid context. |
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*/ |
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public function acceptRequest() |
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{ |
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$body = $this->getWorker()->receive($ctx); |
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if (empty($body) && empty($ctx)) { |
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// termination request |
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foreach ($this->terminationListeners as $listener) { |
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call_user_func($listener); |
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} |
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return null; |
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} |
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$ctx = json_decode($ctx, true); |
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if (is_null($ctx)) { |
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// invalid context |
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return null; |
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} |
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return ['ctx' => $ctx, 'body' => $body]; |
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} |
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/** |
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* Send response to the application server. |
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* |
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* @param int $status Http status code |
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* @param string $body Body of response |
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* @param string[][] $headers An associative array of the message's headers. Each |
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* key MUST be a header name, and each value MUST be an array of strings |
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* for that header. |
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*/ |
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public function respond(int $status, string $body, array $headers = []) |
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{ |
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if (empty($headers)) { |
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// this is required to represent empty header set as map and not as array |
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$headers = new \stdClass(); |
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} |
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$this->getWorker()->send( |
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$body, |
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json_encode(['status' => $status, 'headers' => $headers]) |
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); |
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} |
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/** |
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* Adds function to termination event listeners |
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* |
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* @param callable $func Function to call on termination request |
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* @throws \ReflectionException |
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*/ |
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public function addTerminationListener(callable $func) |
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{ |
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$f = new ReflectionFunction($func); |
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if ($f->getNumberOfParameters() > 0) { |
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throw new \InvalidArgumentException('Termination event callback can\'t have parameters.'); |
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} |
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$this->terminationListeners[] = $func; |
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} |
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/** |
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* Clears all termination event listeners |
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*/ |
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public function clearTerminationListeners() |
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{ |
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$this->terminationListeners = []; |
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} |
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} |
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spiral /
roadrunner
