add `error` event handler

example/ding-dong-bot.js

@@ -31,6 +31,7 @@ const bot = new Wechaty({ session: 'example-bot.wechaty.json' })
 bot
 .on('login'	  , user => log.info('Bot', `${user.name()} logined`))
 .on('logout'	, user => log.info('Bot', `${user.name()} logouted`))
+.on('error'   , e => log.info('Bot', 'error: %s', e))
 .on('scan', ({url, code}) => {
   if (!/201|200/.test(code)) {
     let loginUrl = url.replace(/\/qrcode\//, '/l/')

src/puppet-web-injectio.js

@@ -430,7 +430,7 @@ return (function(port) {
     }
 
     /*global io*/ // Wechaty global variable: socket
-    var socket  = Wechaty.vars.socket = io.connect('https://127.0.0.1:' + port)
+    var socket  = Wechaty.vars.socket = io.connect('wss://127.0.0.1:' + port, {transports: ['websocket']})
 
     // ding -> dong. for test & live check purpose
     // ping/pong are reserved by socket.io https://github.com/socketio/socket.io/issues/2414

src/puppet-web-server.js

@@ -97,7 +97,8 @@ class Server extends EventEmitter {
       // log: true
     })
     socketServer.sockets.on('connection', (s) => {
-      log.verbose('PuppetWebServer', 'createSocketIo() got connection from browser')
+      log.verbose('PuppetWebServer', 'createSocketIo() got connection from browser')
+      // console.log(s.handshake)
       if (this.socketClient) { this.socketClient = null } // close() ???
       this.socketClient = s
       this.initEventsFromClient(s)