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<?php |
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/* |
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* This file is part of the OverblogGraphQLBundle package. |
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* |
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* (c) Overblog <http://github.com/overblog/> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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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 |
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{ |
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/** |
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* Parses the HTTP request and extracts the GraphQL request parameters. |
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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 $request) |
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{ |
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// Extracts the GraphQL request parameters |
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$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 $request) |
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{ |
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$body = $request->getContent(); |
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$type = explode(';', $request->headers->get('content-type'))[0]; |
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switch ($type) { |
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// Plain string |
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case 'application/graphql': |
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$parsedBody = ['query' => $body]; |
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break; |
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// JSON object |
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case 'application/json': |
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$json = json_decode($body, true); |
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if (JSON_ERROR_NONE !== json_last_error()) { |
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throw new BadRequestHttpException( |
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sprintf('POST body sent invalid JSON [%s]', json_last_error_msg()) |
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); |
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} |
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$parsedBody = $json; |
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break; |
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// URL-encoded query-string |
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case 'application/x-www-form-urlencoded': |
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case 'multipart/form-data': |
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$parsedBody = $request->request->all(); |
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break; |
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default: |
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$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 $data = []) |
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{ |
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// Add default request parameters |
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$data = $data + [ |
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'query' => null, |
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'variables' => null, |
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'operationName' => null, |
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]; |
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// Keep a reference to the query-string |
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$qs = $request->query; |
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// Override request using query-string parameters |
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$query = $qs->has('query') ? $qs->get('query') : $data['query']; |
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$variables = $qs->has('variables') ? $qs->get('variables') : $data['variables']; |
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$operationName = $qs->has('operationName') ? $qs->get('operationName') : $data['operationName']; |
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// `query` parameter is mandatory. |
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if (empty($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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'query' => $query, |
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'variables' => $variables, |
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'operationName' => $operationName, |
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]; |
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} |
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} |
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overblog /
GraphQLBundle
