Get & write out graphql schema

graphql-get-schema.js

const fs = require('fs');
require('isomorphic-fetch');
const {introspectionQuery, buildClientSchema, printSchema} = require('graphql');

function introspectionProvider(introspectionQuery) {
  console.log(JSON.stringify({query: introspectionQuery}));
  return fetch('https://marketplace-api.qa.kamereo.vn/graphql', {
    method: 'post',
    headers: {
      Accept: 'application/json',
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({query: introspectionQuery}),
  })
    .then(function(response) {
      return response.text();
    })
    .then(function(responseBody) {
      const introspectionSchemaResult = JSON.parse(responseBody).data;
      const graphqlSchemaObj = buildClientSchema(introspectionSchemaResult);
      const sdlString = printSchema(graphqlSchemaObj);
      fs.writeFile('schema.graphql', sdlString, () => null);
    });
}

introspectionProvider(introspectionQuery);