A simple node server to test webhooks

README.md

1. Run the server with node index.js
2. Use ngrok to expose the server publicly ngrok http 3000
3. Subscribe to the relevant hook.

mutation subscribeToHook {
  createdByAdminWebhookSubscriptionCreate(
    topic: <Webhook Topic>
    webhookSubscription: {
      apiVersion: "unstable"
      callbackUrl: "https://<NGROK URL>/hook"
    }
  ) {
    webhookSubscription {
      endpoint {
        __typename
      }
    }
  }
}

index.js

const express = require("express")
const bodyParser = require("body-parser")
const fs = require('fs');

const app = express()

app.use(bodyParser.json())

app.listen(3000, () => console.log(`🚀 Server running`))

// generate a file name for this server session
const now = new Date();
const filename = `./output-${now.getFullYear()}-${now.getMonth()}-${now.getDate()}-${now.getHours()}-${now.getMinutes()}`;
console.log(`writing output to: ${filename}`);


app.use(bodyParser.json())

const process = (req, res, suffix) => {
  const fd = fs.openSync(`${filename}-${suffix}.json`, 'a');

  fs.appendFileSync(fd, "\n\n\n\n// == NEW ENTRY ==\n\n")

  fs.appendFileSync(fd, "\n\n\n\n// = HEADERS\n\n")
  fs.appendFileSync(fd, JSON.stringify(req.headers, null, 2));

  fs.appendFileSync(fd, "\n\n\n\n// = BODY\n\n")
  fs.appendFileSync(fd, JSON.stringify(req.body, null, 2)) 
  fs.closeSync(fd);

  res.status(200).end()
}

app.post("/order", (req, res) => process(req, res, 'order'))
app.post("/fulfillment", (req, res) => process(req, res, 'fulfillment'))
app.post("/fulfillment-events", (req, res) => process(req, res, 'fulfillment-events'))