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<?php |
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namespace Yoanm\JsonRpcServer\App\Serialization; |
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use Yoanm\JsonRpcServer\Domain\Exception\JsonRpcExceptionInterface; |
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/** |
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* JsonRpcResponseErrorNormalizer prepares response data for the "unexpected" errors occur during request processing. |
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* |
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* It handles "internal server error" appearance in the response. |
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* Instance of this class should be attached to {@see \Yoanm\JsonRpcServer\App\Serialization\JsonRpcResponseNormalizer} |
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* only in "debug" mode, |
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* since it will expose vital internal information to the API consumer. |
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* |
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* @see \Yoanm\JsonRpcServer\App\Serialization\JsonRpcResponseNormalizer::normalizeError() |
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*/ |
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class JsonRpcResponseErrorNormalizer |
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{ |
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/** |
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* @var int maximum count of trace lines to be displayed. |
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*/ |
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private $maxTraceSize; |
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/** |
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* @var bool whether to show trace arguments. |
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*/ |
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private $showTraceArguments; |
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/** |
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* @var bool whether to simplify trace arguments representation. |
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*/ |
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private $simplifyTraceArguments; |
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/** |
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* @param int $maxTraceSize maximum count of trace lines to be displayed. |
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* @param bool $showTraceArguments whether to show trace arguments. |
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* @param bool $simplifyTraceArguments whether to simplify trace arguments representation. |
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*/ |
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public function __construct( |
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int $maxTraceSize = 10, |
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bool $showTraceArguments = true, |
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bool $simplifyTraceArguments = true |
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) { |
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$this->maxTraceSize = $maxTraceSize; |
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$this->showTraceArguments = $showTraceArguments; |
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$this->simplifyTraceArguments = $simplifyTraceArguments; |
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} |
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/** |
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* @param JsonRpcExceptionInterface $error |
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* @return array |
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*/ |
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public function normalize(JsonRpcExceptionInterface $error) : array |
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{ |
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// `JsonRpcExceptionInterface` has a little value regarding debug error data composition on its own, |
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// thus use previous exception, if available: |
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return $this->composeDebugErrorData($error->getPrevious() ?? $error); |
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} |
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/** |
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* @param \Throwable $error |
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* @return array |
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*/ |
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private function composeDebugErrorData(\Throwable $error) : array |
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{ |
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$data = [ |
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'_class' => get_class($error), |
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'_code' => $error->getCode(), |
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'_message' => $error->getMessage(), |
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]; |
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$trace = $this->filterErrorTrace($error->getTrace()); |
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if (!empty($trace)) { |
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$data['_trace'] = $trace; |
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} |
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return $data; |
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} |
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/** |
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* @param array $trace raw exception stack trace. |
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* @return array simplified stack trace. |
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*/ |
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private function filterErrorTrace(array $trace): array |
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{ |
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$trace = array_slice($trace, 0, $this->maxTraceSize); |
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$result = []; |
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foreach ($trace as $entry) { |
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if (array_key_exists('args', $entry)) { |
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if ($this->showTraceArguments) { |
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if ($this->simplifyTraceArguments) { |
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$entry['args'] = $this->simplifyArguments($entry['args']); |
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} |
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} else { |
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unset($entry['args']); |
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} |
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} |
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$result[] = $entry; |
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} |
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return $result; |
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} |
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/** |
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* Converts arguments array to their simplified representation. |
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* |
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* @param array $args arguments array to be converted. |
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* @return string string representation of the arguments array. |
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*/ |
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private function simplifyArguments(array $args) : string |
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{ |
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$count = 0; |
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$isAssoc = $args !== array_values($args); |
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foreach ($args as $key => $value) { |
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$count++; |
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if ($count >= 5) { |
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if ($count > 5) { |
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unset($args[$key]); |
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} else { |
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$args[$key] = '...'; |
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} |
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continue; |
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} |
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$args[$key] = $this->simplifyArgument($value); |
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if (is_string($key)) { |
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$args[$key] = "'" . $key . "' => " . $args[$key]; |
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} elseif ($isAssoc) { |
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// contains both numeric and string keys: |
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$args[$key] = $key.' => '.$args[$key]; |
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} |
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} |
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return implode(', ', $args); |
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} |
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private function simplifyArgument(mixed $value): mixed |
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{ |
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if (is_object($value)) { |
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return get_class($value); |
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} elseif (is_bool($value)) { |
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return $value ? 'true' : 'false'; |
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} elseif (is_string($value)) { |
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if (strlen($value) > 64) { |
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return "'" . substr($value, 0, 64) . "...'"; |
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} else { |
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return "'" . $value . "'"; |
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} |
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} elseif (is_array($value)) { |
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return '[' . $this->simplifyArguments($value) . ']'; |
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} elseif ($value === null) { |
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return 'null'; |
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} elseif (is_resource($value)) { |
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return 'resource'; |
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} |
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return $value; |
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} |
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} |
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yoanm /
php-jsonrpc-server-sdk
