Fixes webhook verification with Micro when verifyToken is set in bot

src/micro/__tests__/createServer.spec.js

@@ -7,12 +7,13 @@ import createServer from '../createServer';
 jest.mock('urlencoded-body-parser');
 jest.mock('../../connectNgrok');
 
-function setup({ platform }) {
+function setup({ platform, verifyToken }) {
   const requestHandler = jest.fn();
   const bot = {
     createRequestHandler: () => requestHandler,
     connector: {
       platform,
+      verifyToken,
     },
   };
   return {
@@ -48,6 +49,22 @@ it('should handle token verification', async () => {
   expect(text).toBe('chatbot is awesome');
 });
 
+it('should handle token verification if verify token is passed in bot ', async () => {
+  const verifyToken = '1qaz2wsx';
+  const { bot } = setup({ platform: 'messenger', verifyToken });
+  const server = createServer(bot);
+  const { status, text } = await request(server)
+    .get('/')
+    .query({
+      'hub.mode': 'subscribe',
+      'hub.verify_token': verifyToken,
+      'hub.challenge': 'chatbot is awesome',
+    });
+
+  expect(status).toBe(200);
+  expect(text).toBe('chatbot is awesome');
+});
+
 it('should not handle token verification if platform is not messenger', async () => {
   const { bot } = setup({ platform: 'line' });
   const verifyToken = '1qaz2wsx';

src/micro/createRequestHandler.js

@@ -1,5 +1,6 @@
 import { json, send } from 'micro';
 import parseUrlencoded from 'urlencoded-body-parser';
+import shortid from 'shortid';
 
 import verifyLineSignature from './verifyLineSignature';
 import verifyMessengerSignature from './verifyMessengerSignature';
@@ -12,7 +13,10 @@ function createRequestHandler(bot, config = {}) {
   const requestHandler = bot.createRequestHandler();
   return async (req, res) => {
     if (req.method === 'GET' && bot.connector.platform === 'messenger') {
-      verifyMessengerWebhook({ verifyToken: config.verifyToken })(req, res);
+      verifyMessengerWebhook({
+        verifyToken:
+          config.verifyToken || bot.connector.verifyToken || shortid.generate(),
+      })(req, res);
     } else if (req.method === 'POST') {
       let body;
       if (req.headers['content-type'] === 'application/x-www-form-urlencoded') {