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<?php |
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namespace Plinker\Core; |
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use Requests; |
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/** |
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* Plinker Client |
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*/ |
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class Client |
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{ |
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private $endpoint; |
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private $component; |
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private $publicKey; |
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private $privateKey; |
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private $config; |
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private $encrypt; |
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private $response; |
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private $signer; |
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/** |
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* @param string $endpoint |
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* @param string $component |
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* @param string $publicKey |
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* @param string $privateKey |
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* @param array $config |
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* @param bool $encrypt |
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*/ |
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public function __construct( |
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$endpoint, |
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$component, |
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$publicKey = '', |
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$privateKey = '', |
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$config = [], |
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$encrypt = true |
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) { |
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// define vars |
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$this->endpoint = $endpoint; |
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$this->component = $component; |
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$this->publicKey = hash('sha256', gmdate('h').$publicKey); |
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$this->privateKey = hash('sha256', gmdate('h').$privateKey); |
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$this->config = $config; |
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$this->encrypt = $encrypt; |
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$this->response = null; |
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// init signer |
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$this->signer = new Signer($this->publicKey, $this->privateKey, $this->encrypt); |
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} |
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/** |
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* Helper which changes the server component on the fly without changing |
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* the connection. |
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* |
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* @param string $component - component class namespace |
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* @param array $config - component array |
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*/ |
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public function useComponent($component = '', $config = [], $encrypt = true) |
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{ |
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$this->component = $component; |
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$this->config = $config; |
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$this->encrypt = $encrypt; |
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return new $this( |
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$this->endpoint, |
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$this->component, |
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$this->publicKey, |
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$this->privateKey, |
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$this->config, |
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$this->encrypt |
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); |
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} |
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/** |
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* Call endpoint |
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* |
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* @param string $encoded |
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* @param array $params |
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* @return mixed |
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*/ |
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final private function callEndpoint($encoded, $params = []) |
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{ |
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// testing |
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if (getenv('APP_ENV') === 'testing') { |
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// good |
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$response = new \stdClass(); |
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$response->body = serialize($this->signer->encode([ |
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'response' => $params, |
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])); |
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// fail |
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if (getenv('TEST_CONDITION') === 'http_empty_response') { |
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$response->raw = 'Testing fail'; |
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$response->body = null; |
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} |
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// fail |
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if (getenv('TEST_CONDITION') === 'http_invalid_response') { |
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$response->raw = 'Testing fail'; |
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$response->body = 'Invalid text response'; |
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} |
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} |
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// normal request, store in response |
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else { |
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// @codeCoverageIgnoreStart |
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$response = Requests::post( |
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$this->endpoint, |
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[ |
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// send plinker header |
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'plinker' => true, |
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// sign token generated from encoded packet, send as header |
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'token' => hash_hmac('sha256', $encoded['token'], $this->privateKey), |
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], |
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$encoded, |
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[ |
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'timeout' => (!empty($this->config['timeout']) ? (int) $this->config['timeout'] : 60), |
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] |
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); |
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// @codeCoverageIgnoreEnd |
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} |
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return $response; |
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} |
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/** |
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* Decode response |
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* |
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* @param string $encoded |
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* @param array $params |
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* @return mixed |
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*/ |
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final private function decodeResponse($response) |
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{ |
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// check response is a serialized string |
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if (@unserialize($response->body) === false) { |
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if (empty($response->body)) { |
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$message = $response->raw; |
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} else { |
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// @codeCoverageIgnoreStart |
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$message = $response->body; |
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// @codeCoverageIgnoreEnd |
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} |
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throw new \Exception('Could not unserialize response: '.$message); |
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} |
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// initial unserialize response body |
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$response->body = unserialize($response->body); |
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// testing - http_slow_response |
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if (getenv('APP_ENV') === 'testing') { |
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// fail |
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if (getenv('TEST_CONDITION') === 'http_slow_packet_response') { |
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$response->body['time'] = $response->body['time']-5; |
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} |
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} |
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// decode response |
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$return = $this->signer->decode( |
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$response->body |
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); |
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// testing - http_slow_response |
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if (getenv('APP_ENV') === 'testing') { |
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// fail |
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if (getenv('TEST_CONDITION') === 'http_slow_data_response') { |
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$return['time'] = $return['time']-5; |
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} |
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// fail |
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if (getenv('TEST_CONDITION') === 'data_empty_response') { |
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$return['response'] = ''; |
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} |
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// fail |
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if (getenv('TEST_CONDITION') === 'data_invalid_response') { |
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$return['response'] = 'Response not serialized'; |
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} |
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// fail |
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if (getenv('TEST_CONDITION') === 'data_error_response') { |
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$return['response'] = serialize(['error' => 'Error from component']); |
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} |
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} |
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return $return; |
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} |
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/** |
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* Magic caller. |
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* |
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* @param string $action |
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* @param array $params |
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* @return mixed |
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*/ |
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public function __call($action, $params) |
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{ |
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if (!is_scalar($action)) { |
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throw new \InvalidArgumentException('Method name has no scalar value'); |
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} |
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if (!is_array($params)) { |
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throw new \InvalidArgumentException('Arguments must be given as array'); |
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} |
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// change arguments array into numeric indexed |
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$params = array_values($params); |
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// unset local private key |
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unset($this->config['plinker']['private_key']); |
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// encode payload |
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$encoded = $this->signer->encode([ |
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'time' => microtime(true), |
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'self' => $this->endpoint, |
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'component' => $this->component, |
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'config' => $this->config, |
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'action' => $action, |
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'params' => $params, |
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]); |
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// call endpoint |
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$this->response = $this->callEndpoint($encoded, $params); |
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// decode response |
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$response = $this->decodeResponse($this->response); |
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// verify response packet timing validity |
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$response['packet_time'] = microtime(true) - $this->response->body['time']; |
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if ($response['packet_time'] >= 1) { |
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throw new \Exception('Response timing packet check failed'); |
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} |
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// verify data timing validity |
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$response['data_time'] = (microtime(true) - $response['time']); |
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if ($response['data_time'] >= 1) { |
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throw new \Exception('Response timing data check failed'); |
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} |
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// decode response data |
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if (is_string($response['response'])) { |
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// empty data response |
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if (empty($response['response'])) { |
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return ''; |
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} |
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// response should be a serialized string |
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if (@unserialize($response['response']) === false) { |
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throw new \Exception('Could not unserialize response: '.$response['response']); |
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} |
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$response['response'] = unserialize($response['response']); |
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} |
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// check for errors |
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if (is_array($response['response']) && !empty($response['response']['error'])) { |
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throw new \Exception(ucfirst($response['response']['error'])); |
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} |
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// unserialize data |
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return $response['response']; |
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} |
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} |
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plinker-rpc /
core
