Update ImageAnalysisQuickstart.js

javascript/ComputerVision/ImageAnalysisQuickstart.js

@@ -427,7 +427,32 @@ function computerVision() {
       console.log('-------------------------------------------------');
       console.log('End of quickstart.');
       // <snippet_functiondef_end>
-
+
+      function downloadFilesToLocal(url, localFileName) {
+          return new Promise((resolve, reject) => {
+              console.log('--- Downloading file to local directory from: ' + url);
+              const request = https.request(url, (res) => {
+                  if (res.statusCode !== 200) {
+                      console.log(`Download sample file failed. Status code: ${res.statusCode}, Message: ${res.statusMessage}`);
+                      reject();
+                  }
+                  var data = [];
+                  res.on('data', (chunk) => {
+                      data.push(chunk);
+                  });
+                  res.on('end', () => {
+                      console.log('   ... Downloaded successfully');
+                      fs.writeFileSync(localFileName, Buffer.concat(data));
+                      resolve();
+                  });
+              });
+              request.on('error', function(e) {
+                  console.log(e.message);
+                  reject();
+              });
+              request.end();
+          });
+      }
     },
     function () {
       return new Promise((resolve) => {