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<?php |
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declare(strict_types=1); |
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namespace Overblog\GraphQLBundle\Request; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpKernel\Exception\BadRequestHttpException; |
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class Parser implements ParserInterface |
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{ |
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use UploadParserTrait; |
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/** |
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* @param Request $request |
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* |
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* @return array |
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*/ |
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public function parse(Request $request): array |
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{ |
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// Extracts the GraphQL request parameters |
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$parsedBody = $this->getParsedBody($request); |
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$data = $this->getParams($request, $parsedBody); |
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return $data; |
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} |
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/** |
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* Gets the body from the request based on Content-Type header. |
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* |
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* @param Request $request |
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* |
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* @return array |
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*/ |
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private function getParsedBody(Request $request): array |
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{ |
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$body = $request->getContent(); |
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$method = $request->getMethod(); |
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$contentType = \explode(';', (string) $request->headers->get('content-type'), 2)[0]; |
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switch ($contentType) { |
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// Plain string |
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case static::CONTENT_TYPE_GRAPHQL: |
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$parsedBody = [static::PARAM_QUERY => $body]; |
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break; |
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// JSON object |
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case static::CONTENT_TYPE_JSON: |
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if (empty($body)) { |
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if (Request::METHOD_GET === $method) { |
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$parsedBody = []; |
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break; |
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} |
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throw new BadRequestHttpException('The request content body must not be empty when using json content type request.'); |
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} |
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$parsedBody = \json_decode($body, true); |
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if (\JSON_ERROR_NONE !== \json_last_error()) { |
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throw new BadRequestHttpException('POST body sent invalid JSON'); |
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} |
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break; |
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// URL-encoded query-string |
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case static::CONTENT_TYPE_FORM: |
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$parsedBody = $request->request->all(); |
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break; |
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case static::CONTENT_TYPE_FORM_DATA: |
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$parsedBody = $this->handleUploadedFiles($request->request->all(), $request->files->all()); |
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break; |
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default: |
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$parsedBody = []; |
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break; |
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} |
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return $parsedBody; |
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} |
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/** |
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* Gets the GraphQL parameters from the request. |
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* |
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* @param Request $request |
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* @param array $data |
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* |
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* @return array |
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*/ |
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private function getParams(Request $request, array $data = []): array |
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{ |
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// Add default request parameters |
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$data = \array_filter($data) + [ |
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static::PARAM_QUERY => null, |
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static::PARAM_VARIABLES => null, |
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static::PARAM_OPERATION_NAME => null, |
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]; |
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// Use all query parameters, since starting from Symfony 6 there will be an exception accessing array parameters |
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// via request->query->get(key), and another exception accessing non-array parameter via request->query->all(key) |
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$queryParameters = $request->query->all(); |
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// Override request using query-string parameters |
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$query = $queryParameters[static::PARAM_QUERY] ?? $data[static::PARAM_QUERY]; |
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$variables = $queryParameters[static::PARAM_VARIABLES] ?? $data[static::PARAM_VARIABLES]; |
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$operationName = $queryParameters[static::PARAM_OPERATION_NAME] ?? $data[static::PARAM_OPERATION_NAME]; |
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// `query` parameter is mandatory. |
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if (empty($query)) { |
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throw new BadRequestHttpException('Must provide query parameter'); |
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} |
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// Variables can be defined using a JSON-encoded object. |
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// If the parsing fails, an exception will be thrown. |
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if (\is_string($variables)) { |
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$variables = \json_decode($variables, true); |
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if (\JSON_ERROR_NONE !== \json_last_error()) { |
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throw new BadRequestHttpException('Variables are invalid JSON'); |
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} |
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} |
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return [ |
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static::PARAM_QUERY => $query, |
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static::PARAM_VARIABLES => $variables, |
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static::PARAM_OPERATION_NAME => $operationName, |
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]; |
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} |
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} |
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overblog /
GraphQLBundle
