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<?php |
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namespace veejay\jsonrpc; |
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use Error; |
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use veejay\jsonrpc\batch\Request; |
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use veejay\jsonrpc\batch\Response; |
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use veejay\jsonrpc\exception\Exception; |
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class Server |
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{ |
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/** |
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* Api for responses. |
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* @var Api |
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*/ |
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protected $api; |
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/** |
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* Max amount of requests. |
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* 0 - unlimited. |
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* @var int|null |
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*/ |
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protected $limit; |
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/** |
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* @param Api $api |
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* @param int $limit |
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*/ |
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public function __construct(Api $api, int $limit = 0) |
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{ |
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$this->api = $api; |
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$this->limit = $limit; |
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} |
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/** |
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* Run server. |
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* @return string |
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*/ |
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public function run() |
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{ |
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try { |
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$data = $this->getData(); |
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$multiple = is_array($data); |
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if (is_object($data)) { |
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$data = [$data]; |
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} |
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if (empty($data)) { |
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throw new Exception(Response::INVALID_REQUEST); |
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} elseif ($this->limit !== 0 && $this->limit < count($data)) { |
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throw new Exception(Response::LIMIT_EXCEEDED); |
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} |
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$responses = []; |
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foreach ((array)$data as $datum) { |
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$request = (new Request)->setProperties($datum); |
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$response = $this->getResponse($request); |
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if ($response->isNotification() && !$response->hasError()) { |
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continue; |
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} |
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$responses[] = $response->getData(); |
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} |
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// Check if ID already exists |
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$ids = []; |
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foreach ($responses as $response) { |
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if ($response->id === null) continue; |
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if (in_array($response->id, $ids, true)) { |
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throw new Exception(Response::DUPLICATED_ID); |
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} |
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array_push($ids, $response->id); |
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} |
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} catch (Exception $exception) { |
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return (string)$exception; |
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} |
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if (empty($responses)) return ''; |
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return json_encode($multiple ? $responses : current($responses)); |
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} |
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/** |
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* Create Response object for Request. |
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* @param Request $request |
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* @return Response |
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*/ |
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protected function getResponse(Request $request): Response |
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{ |
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$response = new Response; |
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$response->jsonrpc = Response::VERSION; |
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$response->id = $request->id; |
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$this->validate($request, $response); |
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if ($response->hasError()) { |
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return $response; |
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} |
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try { |
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$response->result = call_user_func_array([$this->api, $request->method], [(array)$request->params]); |
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} catch (Exception $e) { |
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$response->setError($e->getCode(), $e->getMessage()); |
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} catch (Error $e) { |
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$response->setError(Response::INTERNAL_ERROR); |
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} |
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return $response; |
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} |
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/** |
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* Validate Request and set error. |
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* @param Request $request |
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* @param Response $response |
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* @return void |
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*/ |
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protected function validate(Request $request, Response $response) |
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{ |
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$type = gettype($request->id); |
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if ( |
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$request->jsonrpc !== Response::VERSION || |
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!is_string($request->method) || |
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!in_array($type, ['NULL', 'integer', 'string']) |
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) { |
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$response->setError(Response::INVALID_REQUEST); |
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} elseif (!is_array($request->params) && !is_object($request->params) && !is_null($request->params)) { |
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$response->setError(Response::INVALID_PARAMS); |
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} |
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} |
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/** |
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* Get data from request. |
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* @return mixed |
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* @throws Exception |
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*/ |
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protected function getData() |
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{ |
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$content = $this->getRawContent(); |
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$data = is_string($content) ? @json_decode($content) : null; |
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if ($data === null) { |
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throw new Exception(Response::PARSE_ERROR); |
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} |
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return $data; |
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} |
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/** |
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* Read raw content. |
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* @return string|false |
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*/ |
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protected function getRawContent() |
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{ |
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return @file_get_contents('php://input'); |
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} |
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} |
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Veejayspb /
jsonrpc
