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* * @api */ public function parseHttpRequest(?callable $readRawBodyFn = null) { $method = $_SERVER['REQUEST_METHOD'] ?? null; $bodyParams = []; $urlParams = $_GET; if ($method === 'POST') { $contentType = $_SERVER['CONTENT_TYPE'] ?? null; if ($contentType === null) { throw new MissingContentTypeHeader('Missing "Content-Type" header'); } if (stripos($contentType, 'application/graphql') !== false) { $rawBody = $readRawBodyFn === null ? $this->readRawBody() : $readRawBodyFn(); $bodyParams = ['query' => $rawBody]; } elseif (stripos($contentType, 'application/json') !== false) { $rawBody = $readRawBodyFn === null ? $this->readRawBody() : $readRawBodyFn(); $bodyParams = $this->decodeJson($rawBody); $this->assertJsonObjectOrArray($bodyParams); } elseif (stripos($contentType, 'application/x-www-form-urlencoded') !== false) { $bodyParams = $_POST; } elseif (stripos($contentType, 'multipart/form-data') !== false) { $bodyParams = $_POST; } else { throw new UnexpectedContentType('Unexpected content type: ' . Utils::printSafeJson($contentType)); } } return $this->parseRequestParams($method, $bodyParams, $urlParams); } /** * Parses normalized request params and returns instance of OperationParams * or array of OperationParams in case of batch operation. * * Returned value is a suitable input for `executeOperation` or `executeBatch` (if array) * * @param array $bodyParams * @param array $queryParams * * @throws RequestError * * @return OperationParams|array * * @api */ public function parseRequestParams(string $method, array $bodyParams, array $queryParams) { if ($method === 'GET') { return OperationParams::create($queryParams, true); } if ($method === 'POST') { if (isset($bodyParams[0])) { $operations = []; foreach ($bodyParams as $entry) { $operations[] = OperationParams::create($entry); } return $operations; } return OperationParams::create($bodyParams); } throw new HttpMethodNotSupported("HTTP Method \"{$method}\" is not supported"); } /** * Checks validity of OperationParams extracted from HTTP request and returns an array of errors * if params are invalid (or empty array when params are valid). * * @return list * * @api */ public function validateOperationParams(OperationParams $params): array { $errors = []; $query = $params->query ?? ''; $queryId = $params->queryId ?? ''; if ($query === '' && $queryId === '') { $errors[] = new MissingQueryOrQueryIdParameter('Automattic\WooCommerce\Vendor\GraphQL Request must include at least one of those two parameters: "query" or "queryId"'); } if (! is_string($query)) { $errors[] = new InvalidQueryParameter( 'Automattic\WooCommerce\Vendor\GraphQL Request parameter "query" must be string, but got ' . Utils::printSafeJson($params->query) ); } if (! is_string($queryId)) { $errors[] = new InvalidQueryIdParameter( 'Automattic\WooCommerce\Vendor\GraphQL Request parameter "queryId" must be string, but got ' . Utils::printSafeJson($params->queryId) ); } if ($params->operation !== null && ! is_string($params->operation)) { $errors[] = new InvalidOperationParameter( 'Automattic\WooCommerce\Vendor\GraphQL Request parameter "operation" must be string, but got ' . Utils::printSafeJson($params->operation) ); } if ($params->variables !== null && (! is_array($params->variables) || isset($params->variables[0]))) { $errors[] = new CannotParseVariables( 'Automattic\WooCommerce\Vendor\GraphQL Request parameter "variables" must be object or JSON string parsed to object, but got ' . Utils::printSafeJson($params->originalInput['variables']) ); } return $errors; } /** * Executes Automattic\WooCommerce\Vendor\GraphQL operation with given server configuration and returns execution result * (or promise when promise adapter is different from SyncPromiseAdapter). * * @throws \Exception * @throws InvariantViolation * * @return ExecutionResult|Promise * * @api */ public function executeOperation(ServerConfig $config, OperationParams $op) { $promiseAdapter = $config->getPromiseAdapter() ?? Executor::getDefaultPromiseAdapter(); $result = $this->promiseToExecuteOperation($promiseAdapter, $config, $op); if ($promiseAdapter instanceof SyncPromiseAdapter) { $result = $promiseAdapter->wait($result); } return $result; } /** * Executes batched Automattic\WooCommerce\Vendor\GraphQL operations with shared promise queue * (thus, effectively batching deferreds|promises of all queries at once). * * @param array $operations * * @throws \Exception * @throws InvariantViolation * * @return array|Promise * * @api */ public function executeBatch(ServerConfig $config, array $operations) { $promiseAdapter = $config->getPromiseAdapter() ?? Executor::getDefaultPromiseAdapter(); $result = []; foreach ($operations as $operation) { $result[] = $this->promiseToExecuteOperation($promiseAdapter, $config, $operation, true); } $result = $promiseAdapter->all($result); // Wait for promised results when using sync promises if ($promiseAdapter instanceof SyncPromiseAdapter) { $result = $promiseAdapter->wait($result); } return $result; } /** * @throws \Exception * @throws InvariantViolation */ protected function promiseToExecuteOperation( PromiseAdapter $promiseAdapter, ServerConfig $config, OperationParams $op, bool $isBatch = false ): Promise { try { if ($config->getSchema() === null) { throw new InvariantViolation('Schema is required for the server'); } if ($isBatch && ! $config->getQueryBatching()) { throw new BatchedQueriesAreNotSupported('Batched queries are not supported by this server'); } $errors = $this->validateOperationParams($op); if ($errors !== []) { $locatedErrors = array_map( [Error::class, 'createLocatedError'], $errors ); return $promiseAdapter->createFulfilled( new ExecutionResult(null, $locatedErrors) ); } $doc = $op->queryId !== null ? $this->loadPersistedQuery($config, $op) : $op->query; if (! $doc instanceof DocumentNode) { $doc = Parser::parse($doc); } $operationAST = AST::getOperationAST($doc, $op->operation); if ($operationAST === null) { throw new FailedToDetermineOperationType('Failed to determine operation type'); } $operationType = $operationAST->operation; if ($operationType !== 'query' && $op->readOnly) { throw new GetMethodSupportsOnlyQueryOperation('GET supports only query operation'); } $result = GraphQL::promiseToExecute( $promiseAdapter, $config->getSchema(), $doc, $this->resolveRootValue($config, $op, $doc, $operationType), $this->resolveContextValue($config, $op, $doc, $operationType), $op->variables, $op->operation, $config->getFieldResolver(), $this->resolveValidationRules($config, $op, $doc, $operationType) ); } catch (RequestError $e) { $result = $promiseAdapter->createFulfilled( new ExecutionResult(null, [Error::createLocatedError($e)]) ); } catch (Error $e) { $result = $promiseAdapter->createFulfilled( new ExecutionResult(null, [$e]) ); } $applyErrorHandling = static function (ExecutionResult $result) use ($config): ExecutionResult { $result->setErrorsHandler($config->getErrorsHandler()); $result->setErrorFormatter( FormattedError::prepareFormatter( $config->getErrorFormatter(), $config->getDebugFlag() ) ); return $result; }; return $result->then($applyErrorHandling); } /** * @throws RequestError * * @return mixed */ protected function loadPersistedQuery(ServerConfig $config, OperationParams $operationParams) { $loader = $config->getPersistedQueryLoader(); if ($loader === null) { throw new PersistedQueriesAreNotSupported('Persisted queries are not supported by this server'); } $source = $loader($operationParams->queryId, $operationParams); // @phpstan-ignore-next-line Necessary until PHP gains function types if (! is_string($source) && ! $source instanceof DocumentNode) { $documentNode = DocumentNode::class; $safeSource = Utils::printSafe($source); throw new InvariantViolation("Persisted query loader must return query string or instance of {$documentNode} but got: {$safeSource}"); } return $source; } /** @return array|null */ protected function resolveValidationRules( ServerConfig $config, OperationParams $params, DocumentNode $doc, string $operationType ): ?array { $validationRules = $config->getValidationRules(); if (is_callable($validationRules)) { $validationRules = $validationRules($params, $doc, $operationType); } // @phpstan-ignore-next-line unless PHP gains function types, we have to check this at runtime if ($validationRules !== null && ! is_array($validationRules)) { $safeValidationRules = Utils::printSafe($validationRules); throw new InvariantViolation("Expecting validation rules to be array or callable returning array, but got: {$safeValidationRules}"); } return $validationRules; } /** @return mixed */ protected function resolveRootValue( ServerConfig $config, OperationParams $params, DocumentNode $doc, string $operationType ) { $rootValue = $config->getRootValue(); if (is_callable($rootValue)) { $rootValue = $rootValue($params, $doc, $operationType); } return $rootValue; } /** @return mixed user defined */ protected function resolveContextValue( ServerConfig $config, OperationParams $params, DocumentNode $doc, string $operationType ) { $context = $config->getContext(); if (is_callable($context)) { $context = $context($params, $doc, $operationType); } return $context; } /** * Send response using standard PHP `header()` and `echo`. * * @param Promise|ExecutionResult|array $result * * @api * * @throws \JsonException */ public function sendResponse($result): void { if ($result instanceof Promise) { $result->then(function ($actualResult): void { $this->emitResponse($actualResult); }); } else { $this->emitResponse($result); } } /** * @param array|\JsonSerializable $jsonSerializable * * @throws \JsonException */ protected function emitResponse($jsonSerializable): void { header('Content-Type: application/json;charset=utf-8'); echo json_encode($jsonSerializable, JSON_UNESCAPED_UNICODE | JSON_THROW_ON_ERROR); } /** @throws RequestError */ protected function readRawBody(): string { $body = file_get_contents('php://input'); if ($body === false) { throw new CannotReadBody('Cannot not read body.'); } return $body; } /** * Converts PSR-7 request to OperationParams or an array thereof. * * @throws RequestError * * @return OperationParams|array * * @api */ public function parsePsrRequest(RequestInterface $request) { if ($request->getMethod() === 'GET') { $bodyParams = []; } else { $contentType = $request->getHeader('content-type'); if (! isset($contentType[0])) { throw new MissingContentTypeHeader('Missing "Content-Type" header'); } if (stripos($contentType[0], 'application/graphql') !== false) { $bodyParams = ['query' => (string) $request->getBody()]; } elseif (stripos($contentType[0], 'application/json') !== false) { $bodyParams = $request instanceof ServerRequestInterface ? $request->getParsedBody() : $this->decodeJson((string) $request->getBody()); $this->assertJsonObjectOrArray($bodyParams); } else { if ($request instanceof ServerRequestInterface) { $bodyParams = $request->getParsedBody(); } $bodyParams ??= $this->decodeContent((string) $request->getBody()); } } parse_str(html_entity_decode($request->getUri()->getQuery()), $queryParams); return $this->parseRequestParams( $request->getMethod(), $bodyParams, $queryParams ); } /** * @throws RequestError * * @return mixed */ protected function decodeJson(string $rawBody) { $bodyParams = json_decode($rawBody, true); if (json_last_error() !== \JSON_ERROR_NONE) { throw new CannotParseJsonBody('Expected JSON object or array for "application/json" request, but failed to parse because: ' . json_last_error_msg()); } return $bodyParams; } /** @return array */ protected function decodeContent(string $rawBody): array { parse_str($rawBody, $bodyParams); return $bodyParams; } /** * @param mixed $bodyParams * * @throws RequestError */ protected function assertJsonObjectOrArray($bodyParams): void { if (! is_array($bodyParams)) { $notArray = Utils::printSafeJson($bodyParams); throw new CannotParseJsonBody("Expected JSON object or array for \"application/json\" request, got: {$notArray}"); } } /** * Converts query execution result to PSR-7 response. * * @param Promise|ExecutionResult|array $result * * @throws \InvalidArgumentException * @throws \JsonException * @throws \RuntimeException * * @return Promise|ResponseInterface * * @api */ public function toPsrResponse($result, ResponseInterface $response, StreamInterface $writableBodyStream) { if ($result instanceof Promise) { return $result->then( fn ($actualResult): ResponseInterface => $this->doConvertToPsrResponse($actualResult, $response, $writableBodyStream) ); } return $this->doConvertToPsrResponse($result, $response, $writableBodyStream); } /** * @param ExecutionResult|array $result * * @throws \InvalidArgumentException * @throws \JsonException * @throws \RuntimeException */ protected function doConvertToPsrResponse($result, ResponseInterface $response, StreamInterface $writableBodyStream): ResponseInterface { $writableBodyStream->write(json_encode($result, JSON_THROW_ON_ERROR)); return $response ->withHeader('Content-Type', 'application/json') ->withBody($writableBodyStream); } }