feat(handler): Expose parseRequestParams from the core and each of the adapters

[enisdenjo]

Closes #106
Closes #110

Examples

Request params parser usage with http

import http from 'http';
import { parseRequestParams } from 'graphql-http/lib/use/http';

const server = http.createServer(async (req, res) => {
  if (req.url.startsWith('/graphql')) {
    try {
      const maybeParams = await parseRequestParams(req, res);
      if (!maybeParams) {
        // not a well-formatted GraphQL over HTTP request,
        // parser responded and there's nothing else to do
        return;
      }

      // well-formatted GraphQL over HTTP request,
      // with valid parameters
      res.writeHead(200).end(JSON.stringify(maybeParams, null, '  '));
    } catch (err) {
      // well-formatted GraphQL over HTTP request,
      // but with invalid parameters
      res.writeHead(400).end(err.message);
    }
  } else {
    res.writeHead(404).end();
  }
});

server.listen(4000);
console.log('Listening to port 4000');

Request params parser usage with http2

$ openssl req -x509 -newkey rsa:2048 -nodes -sha256 -subj '/CN=localhost' \
  -keyout localhost-privkey.pem -out localhost-cert.pem

import fs from 'fs';
import http2 from 'http2';
import { parseRequestParams } from 'graphql-http/lib/use/http2';

const server = http2.createSecureServer(
  {
    key: fs.readFileSync('localhost-privkey.pem'),
    cert: fs.readFileSync('localhost-cert.pem'),
  },
  async (req, res) => {
    if (req.url.startsWith('/graphql')) {
      try {
        const maybeParams = await parseRequestParams(req, res);
        if (!maybeParams) {
          // not a well-formatted GraphQL over HTTP request,
          // parser responded and there's nothing else to do
          return;
        }

        // well-formatted GraphQL over HTTP request,
        // with valid parameters
        res.writeHead(200).end(JSON.stringify(maybeParams, null, '  '));
      } catch (err) {
        // well-formatted GraphQL over HTTP request,
        // but with invalid parameters
        res.writeHead(400).end(err.message);
      }
    } else {
      res.writeHead(404).end();
    }
  },
);

server.listen(4000);
console.log('Listening to port 4000');

Request params parser usage with express

import express from 'express'; // yarn add express
import { parseRequestParams } from 'graphql-http/lib/use/express';

const app = express();
app.all('/graphql', async (req, res) => {
  try {
    const maybeParams = await parseRequestParams(req, res);
    if (!maybeParams) {
      // not a well-formatted GraphQL over HTTP request,
      // parser responded and there's nothing else to do
      return;
    }

    // well-formatted GraphQL over HTTP request,
    // with valid parameters
    res.writeHead(200).end(JSON.stringify(maybeParams, null, '  '));
  } catch (err) {
    // well-formatted GraphQL over HTTP request,
    // but with invalid parameters
    res.writeHead(400).end(err.message);
  }
});

app.listen({ port: 4000 });
console.log('Listening to port 4000');

Request params parser usage with fastify

import Fastify from 'fastify'; // yarn add fastify
import { parseRequestParams } from 'graphql-http/lib/use/fastify';

const fastify = Fastify();
fastify.all('/graphql', async (req, reply) => {
  try {
    const maybeParams = await parseRequestParams(req, reply);
    if (!maybeParams) {
      // not a well-formatted GraphQL over HTTP request,
      // parser responded and there's nothing else to do
      return;
    }

    // well-formatted GraphQL over HTTP request,
    // with valid parameters
    reply.status(200).send(JSON.stringify(maybeParams, null, '  '));
  } catch (err) {
    // well-formatted GraphQL over HTTP request,
    // but with invalid parameters
    reply.status(400).send(err.message);
  }
});

fastify.listen({ port: 4000 });
console.log('Listening to port 4000');

Request params parser usage with Koa

import Koa from 'koa'; // yarn add koa
import mount from 'koa-mount'; // yarn add koa-mount
import { parseRequestParams } from 'graphql-http/lib/use/koa';

const app = new Koa();
app.use(
  mount('/', async (ctx) => {
    try {
      const maybeParams = await parseRequestParams(ctx);
      if (!maybeParams) {
        // not a well-formatted GraphQL over HTTP request,
        // parser responded and there's nothing else to do
        return;
      }

      // well-formatted GraphQL over HTTP request,
      // with valid parameters
      ctx.response.status = 200;
      ctx.body = JSON.stringify(maybeParams, null, '  ');
    } catch (err) {
      // well-formatted GraphQL over HTTP request,
      // but with invalid parameters
      ctx.response.status = 400;
      ctx.body = err.message;
    }
  }),
);

app.listen({ port: 4000 });
console.log('Listening to port 4000');

Request params parser usage with uWebSockets.js

import uWS from 'uWebSockets.js'; // yarn add uWebSockets.js@uNetworking/uWebSockets.js#<version>
import { parseRequestParams } from 'graphql-http/lib/use/uWebSockets';

uWS
  .App()
  .any('/graphql', async (res, req) => {
    const abortedRef = { current: false };
    res.onAborted(() => (abortedRef.current = true));
    try {
      const maybeParams = await parseRequestParams(req, res, abortedRef);
      if (!maybeParams) {
        // not a well-formatted GraphQL over HTTP request,
        // parser responded and there's nothing else to do
        return;
      }

      // well-formatted GraphQL over HTTP request,
      // with valid parameters
      if (!abortedRef.current) {
        res.writeStatus('200 OK');
        res.end(JSON.stringify(maybeParams, null, '  '));
      }
    } catch (err) {
      // well-formatted GraphQL over HTTP request,
      // but with invalid parameters
      if (!abortedRef.current) {
        res.writeStatus('400 Bad Request');
        res.end(err.message);
      }
    }
  })
  .listen(4000, () => {
    console.log('Listening to port 4000');
  });

Request params parser usage with Deno

import { serve } from 'https://deno.land/std@0.151.0/http/server.ts';
import { parseRequestParams } from 'https://esm.sh/graphql-http/lib/use/fetch';

await serve(
  async (req: Request) => {
    const [path, _search] = req.url.split('?');
    if (path.endsWith('/graphql')) {
      try {
        const paramsOrResponse = await parseRequestParams(req);
        if (paramsOrResponse instanceof Response) {
          // not a well-formatted GraphQL over HTTP request,
          // parser created a response object to use
          return paramsOrResponse;
        }

        // well-formatted GraphQL over HTTP request,
        // with valid parameters
        return new Response(JSON.stringify(paramsOrResponse, null, '  '), {
          status: 200,
        });
      } catch (err) {
        // well-formatted GraphQL over HTTP request,
        // but with invalid parameters
        return new Response(err.message, { status: 400 });
      }
    } else {
      return new Response(null, { status: 404 });
    }
  },
  {
    port: 4000, // Listening to port 4000
  },
);

Request params parser usage with Bun

import { parseRequestParams } from 'graphql-http/lib/use/fetch'; // bun install graphql-http

export default {
  port: 4000, // Listening to port 4000
  async fetch(req) {
    const [path, _search] = req.url.split('?');
    if (path.endsWith('/graphql')) {
      try {
        const paramsOrResponse = await parseRequestParams(req);
        if (paramsOrResponse instanceof Response) {
          // not a well-formatted GraphQL over HTTP request,
          // parser created a response object to use
          return paramsOrResponse;
        }

        // well-formatted GraphQL over HTTP request,
        // with valid parameters
        return new Response(JSON.stringify(paramsOrResponse, null, '  '), {
          status: 200,
        });
      } catch (err) {
        // well-formatted GraphQL over HTTP request,
        // but with invalid parameters
        return new Response(err.message, { status: 400 });
      }
    } else {
      return new Response(null, { status: 404 });
    }
  },
};

[enisdenjo]

🎉 This PR is included in version 1.22.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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