Update app.js

@@ -73,7 +73,7 @@ app.post('/webhook', line.middleware(config), (req, res) => {
 // event handler
 async function handleEvent(event) {
     console.log(event.type);
-  console.log(event.message.image);
+  console.log(event.message);
 
 
   if (event.type !== 'message' && (event.message.type !== 'text'||event.message.type !== 'image')) {
@@ -82,7 +82,15 @@ async function handleEvent(event) {
   }
   else if (event.type == 'message'&& event.message.type == 'image') {
     return new Promise(async(resolve,reject)=>{
-      console.log("!");
+      client.getMessageContent(event.message.id)
+  .then((stream) => {
+    stream.on('data', (chunk) => {
+      console.log(chunk);
+    });
+    stream.on('error', (err) => {
+      // error handling
+    });
+  });
       var cheerio = require('cheerio');
       
       let subscriptionKey = process.env['COMPUTER_VISION_SUBSCRIPTION_KEY'];