Update app.js

@@ -81,12 +81,8 @@ async function handleEvent(event) {
     return Promise.resolve(null);
   }
   else if (event.type == 'message'&& event.message.type == 'image') {
-    return new Promise(async(resolve,reject)=>{
-      client.getMessageContent(event.message.id)
-  .then((stream) => {
-    stream.on('data', (chunk) => {
-      client.replyMessage(event.replyToken,chunk).then(resolve).catch(reject);    
-       /* 
+    return new Promise(async(resolve,reject)=>{  
+      fs.writeFileSync('./photo/image.png',event.message.image)
       var cheerio = require('cheerio');
       
       var uriBase = 'https://koreacentral.api.cognitive.microsoft.com/vision/v2.1/ocr';
@@ -101,11 +97,11 @@ async function handleEvent(event) {
           'Content-Type': 'application/octet-stream',
           'Ocp-Apim-Subscription-Key': '979dc5d63344438fa4701c62feebb7dc'
         },
-        body: chunk
+        body: fs.readFileSync('./photo/image.png')
       };
       
       request.post(options, function (error, response, body) {
-        
+        data=body;
         var text='';
         while(data.indexOf('text\\')!=-1)
         {
@@ -137,10 +133,9 @@ async function handleEvent(event) {
             }
             client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
           });
-      });*/
+      });
+     
     });
-  });
-    })
   }
   else if(event.type == 'message' && event.message.type == 'text')
   {