问使用express记录所有GraphQL响应

EN

app.use('/graphql', graphqlHTTP(request => {
  return {
    schema,
    rootValue: {
      request
    },
    formatError: error => {
      const params = {
        message  : error.message,
        locations: error.locations,
        stack    : error.stack
      };
      winston.error(`message: "${error.message}", QUERY: "${request.body.query}"`);
      // Optional ${request.body.operationName} ${request.body.variables}
      return (params);
    }
  }
}));

function loggingMiddleware(req, res, next) {
  if (req.url.startsWith('/graphql')) {
    winston.debug('REQUEST: ', req.body);
  }
  next();
}
app.use(loggingMiddleware);