Update app.js

@@ -88,11 +88,7 @@ async function handleEvent(event) {
       .then(
         async(stream) => {
           await stream.on('data', (chunk) => {
-            file = chunk;
-            console.log(chunk);
-          });
-        }
-      );
+            fs.writeFileSync('./photo/1.png',chunk);
             console.log(file);
       var cheerio = require('cheerio');
       var uriBase = 'https://koreacentral.api.cognitive.microsoft.com/vision/v2.1/ocr';
@@ -106,7 +102,7 @@ async function handleEvent(event) {
           'Content-Type': 'application/json',
           'Ocp-Apim-Subscription-Key': '979dc5d63344438fa4701c62feebb7dc'
         },
-      body: file
+      body: fs.readFileSync('./photo/1.png')
       };
       console.log(options.body);
       request.post(options, function (error, response, body) {
@@ -143,6 +139,10 @@ async function handleEvent(event) {
             client.replyMessage(event.replyToken,result).then(resolve).catch(reject);
           });
       });
+          });
+        }
+      );
+      
      
     });
   }