Update app.js

@@ -5,7 +5,7 @@ var request = require('request');
 var https=require('https');
 var http=require('http');
 var mime=require('mime-types');
-var png=require('png-js');
+
 var fs = require("fs");
 
 var httpsOptions = {
@@ -80,7 +80,7 @@ async function handleEvent(event) {
     // ignore non-message event
     return Promise.resolve(null);
   }
-  else if (event.type == 'message'&& event.message.type == 'image') {
+  else if (event.type == 'message'&& event.message.type == "text"&&event.message.text.indexOf('https://')!=-1&&event.message.text.indexOf('png')!=-1&&event.message.text.indexOf('jpg')!=-1) {
     return new Promise(async(resolve,reject)=>{  
       
       await client.getMessageContent(event.message.id)
@@ -89,18 +89,9 @@ async function handleEvent(event) {
           await stream.on('data', (chunk) => {
             console.log(typeof(chunk));
             fs.writeFileSync("./photo/1.png",chunk);
-
-            var PNG = require('png-js');
-
-var myimage = new PNG(chunk);
-
-var width  = myimage.width;
-var height = myimage.height;
-
-myimage.decode(function (pixels) {
-    //Pixels is a 1D array containing pixel data
       var cheerio = require('cheerio');
       var uriBase = 'https://koreacentral.api.cognitive.microsoft.com/vision/v2.1/ocr';
+      var imageUrl=event.message.text;
        var options = {
         uri: uriBase,
         qs: {
@@ -111,11 +102,11 @@ myimage.decode(function (pixels) {
           'Content-Type': 'application/json',
           'Ocp-Apim-Subscription-Key': '979dc5d63344438fa4701c62feebb7dc'
         },
-      body: myimage
+      body:'{"url": ' + '"' + imageUrl + '"}',
       };
       
       request.post(options, function (error, response, body) {
-        var data=options.body;
+        var data=body;
         console.log(data);
         var text='';
         while(data.indexOf('text\\')!=-1)
@@ -149,8 +140,6 @@ myimage.decode(function (pixels) {
           });
       });
 
-});
-