修改 demo

Author: carsonxu

demo/demo.js

@@ -209,7 +209,7 @@ function putObject() {
             Key: filename, /* 必须 */
             Body: fs.createReadStream(filepath), /* 必须 */
             ContentLength: fs.statSync(filepath).size, /* 必须 */
-            onProgress: function (processData) {
+            onProgress: function (progressData) {
                 console.log(JSON.stringify(progressData));
             },
         }, function (err, data) {