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<?php |
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namespace PragmaRX\Health\Checkers; |
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use GuzzleHttp\Client as Guzzle; |
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use GuzzleHttp\TransferStats; |
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use Illuminate\Support\Collection; |
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use PragmaRX\Health\Support\Result; |
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class Http extends Base |
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{ |
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/** |
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* @return Result |
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*/ |
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protected $secure = false; |
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/** |
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* @var |
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*/ |
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protected $guzzle; |
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/** |
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* @var |
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*/ |
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private $totalTime; |
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/** |
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* @var |
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*/ |
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private $url; |
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/** |
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* HTTP Checker. |
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* |
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* @return Result |
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*/ |
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public function check() |
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{ |
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try { |
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$health = []; |
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foreach ($this->getResourceUrlArray() as $url) { |
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[$url, $parameters] = $this->parseConfigUrl($url); |
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[$healthy, $message] = $this->checkWebPage( |
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$this->makeUrlWithScheme($url, $this->secure), |
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$this->secure, |
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$parameters |
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); |
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if (!$healthy) { |
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return $this->makeResult($healthy, $message); |
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} |
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} |
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return $this->makeHealthyResult(); |
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} catch (\Exception $exception) { |
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report($exception); |
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return $this->makeResultFromException($exception); |
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} |
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} |
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/** |
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* Get array of resource urls. |
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* |
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* @return array |
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*/ |
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private function getResourceUrlArray() |
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{ |
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if (is_a($this->target->urls, Collection::class)) { |
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return $this->target->urls->toArray(); |
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} |
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return (array) $this->target->urls; |
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} |
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/** |
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* Check web pages. |
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* |
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* @param $url |
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* @param bool $ssl |
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* @return mixed |
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*/ |
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private function checkWebPage($url, $ssl = false, $parameters = []) |
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{ |
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try { |
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$success = $this->requestSuccessful($url, $ssl, $parameters); |
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$message = $this->getErrorMessage(); |
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} catch (\Exception $exception) { |
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$success = false; |
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$message = "Target: {$url} - ERROR: " . $exception->getMessage(); |
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report($exception); |
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} |
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return [$success, $success ? '' : $message]; |
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} |
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/** |
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* Send an http request and fetch the response. |
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* |
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* @param $url |
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* @param $ssl |
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* @return mixed|\Psr\Http\Message\ResponseInterface |
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* @throws \GuzzleHttp\Exception\GuzzleException |
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*/ |
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private function fetchResponse($url, $ssl, $parameters = []) |
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{ |
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$this->url = $url; |
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return (new Guzzle())->request( |
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$this->getMethod($parameters), |
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$this->url, |
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array_merge($this->getConnectionOptions($ssl), $parameters) |
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); |
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} |
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/** |
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* Get http connection options. |
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* |
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* @param $ssl |
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* @return array |
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*/ |
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private function getConnectionOptions($ssl) |
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{ |
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return [ |
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'connect_timeout' => $this->getConnectionTimeout(), |
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'timeout' => $this->getConnectionTimeout(), |
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'verify' => $ssl, |
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'on_stats' => $this->onStatsCallback() |
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]; |
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} |
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/** |
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* Get the error message. |
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* |
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* @return string |
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*/ |
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private function getErrorMessage() |
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{ |
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$message = $this->target->resource->timeoutMessage; |
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return sprintf( |
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$message, |
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$this->url, |
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$this->totalTime, |
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$this->getRoundtripTimeout() |
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); |
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} |
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/** |
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* The the connection timeout. |
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* |
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* @return int |
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*/ |
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private function getConnectionTimeout() |
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{ |
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return $this->target->resource->connectionTimeout; |
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} |
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/** |
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* The the roundtrip timeout. |
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* |
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* @return int |
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*/ |
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private function getRoundtripTimeout() |
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{ |
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return $this->target->resource->roundtripTimeout; |
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} |
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/** |
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* Make a url with a proper scheme. |
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* |
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* @param $url |
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* @param $secure |
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* @return mixed |
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*/ |
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private function makeUrlWithScheme($url, $secure) |
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{ |
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return preg_replace( |
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'|^((https?:)?\/\/)?(.*)|', |
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'http' . ($secure ? 's' : '') . '://\\3', |
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$url |
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); |
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} |
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/** |
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* Guzzle OnStats callback. |
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* |
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* @return \Closure |
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*/ |
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private function onStatsCallback() |
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{ |
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return function (TransferStats $stats) { |
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$this->totalTime = $stats->getTransferTime(); |
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}; |
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} |
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/** |
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* Send a request and get the result. |
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* |
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* @param $url |
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* @param $ssl |
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* @return bool |
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* @internal param $response |
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*/ |
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private function requestSuccessful($url, $ssl, $parameters) |
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{ |
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$response = $this->fetchResponse($url, $ssl, $parameters); |
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if ($response->getStatusCode() >= 400) { |
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throw new \Exception((string) $response->getBody()); |
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} |
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return !$this->requestTimeout(); |
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} |
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/** |
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* Check if the request timed out. |
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* |
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* @return bool |
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*/ |
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private function requestTimeout() |
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{ |
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return $this->totalTime > $this->getRoundtripTimeout(); |
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} |
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/** |
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* Parse URL from config. |
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* |
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* @return array |
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*/ |
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protected function parseConfigUrl($data) |
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{ |
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if (is_string($data)) { |
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return [$data, []]; |
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} |
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$url = array_keys($data)[0]; |
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$parameters = $data[$url]; |
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$url = isset($parameters['url']) ? $parameters['url'] : $url; |
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return [$url, $parameters]; |
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} |
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/** |
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* Get the request method. |
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* |
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* @return bool |
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*/ |
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protected function getMethod($parameters) |
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{ |
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if (!isset($parameters['method'])) { |
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return 'GET'; |
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} |
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return $parameters['method']; |
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} |
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} |
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This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.
Both the
$myVar
assignment in line 1 and the$higher
assignment in line 2 are dead. The first because$myVar
is never used and the second because$higher
is always overwritten for every possible time line.