Update app.js

@@ -82,12 +82,20 @@ function handleEvent(event) {
   }
   else if (event.type == 'message'&& event.message.type == 'image') {
     return new Promise((resolve,reject)=>{
+      client.getMessageContent(event.message.id).then((stream) => {
+    stream.on('data', (chunk) => {
       request.post( function(error, response, body){
         // Translate API Sucess
         if(!error && response.statusCode == 200){
-            client.replyMessage(event.replyToken,event.message.originalContentUrl).then(resolve).catch(reject);
+            client.replyMessage(event.replyToken,chunk).then(resolve).catch(reject);
         }
     });
+    stream.on('error', (err) => {
+      // error handling
+    });
+  });
+
+    });
       /*console.log("!");
       var cheerio = require('cheerio');