@jaymun723/apollo-server-vercel/dist-src/vercelApollo.js

Production-ready Node.js GraphQL server for Vercel Serverless Functions (temporary package).

import { runHttpQuery, convertNodeHttpToRequest } from "apollo-server-core";
import { setHeaders } from "./setHeaders.js";
export function graphqlVercel(options) {
  if (!options) throw new Error(`Apollo Server requires options.`);

  if (arguments.length > 1) {
    throw new Error(`Apollo Server expects exactly one argument, got ${arguments.length}`);
  }

  const graphqlHandler = async (req, res) => {
    if (req.method === `POST` && !req.body) {
      return res.status(500).send(`POST body missing.`);
    }

    try {
      const {
        graphqlResponse,
        responseInit
      } = await runHttpQuery([req, res], {
        method: req.method,
        options,
        query: req?.body || req.query,
        request: convertNodeHttpToRequest(req)
      });
      setHeaders(res, responseInit.headers ?? {});
      return res.status(200).send(graphqlResponse);
    } catch (error) {
      const {
        headers,
        statusCode,
        message
      } = error;
      setHeaders(res, headers ?? {});
      return res.status(statusCode).send(message);
    }
  };

  return graphqlHandler;
}