Webhook middleware (Chargify)

middleware.js

const app = express();
function rawBodySaver(req, res, buf, encoding) {
  if (buf && buf.length) {
    req.rawBody = buf.toString(encoding || "utf8");
  }
}

// For parsing application/json
app.use(express.json()); 
// For parsing application/x-www-form-urlencoded (which is the Content-Type from Chargify)
// We can add a verify function that allows us access to the Buffer, which we
// can then expose it out on the request as `rawBody`
app.use(express.urlencoded({ verify: rawBodySaver, extended: true }));