Merge remote-tracking branch 'origin/MC-17882' into 2.2-develop-pr34

Author: serhii-balko

lib/web/mage/msie/file-reader.js

@@ -0,0 +1,42 @@
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+define([
+    'jquery'
+], function ($) {
+    'use strict';
+
+    /**
+     * Init "readAsBinaryString" function for FileReader class.
+     * It need for IE11
+     * @param {Blob} fileData
+     */
+    var readAsBinaryStringIEFunc = function (fileData) {
+        var binary = '',
+            self = this,
+            reader = new FileReader();
+
+        /**
+         * Read file as binary string
+         */
+        reader.onload = function () {
+            var bytes, length, index;
+
+            bytes = new Uint8Array(reader.result);
+            length = bytes.length;
+
+            for (index = 0; index < length; index++) {
+                binary += String.fromCharCode(bytes[index]);
+            }
+            //self.result  - readonly so assign binary
+            self.content = binary;
+            $(self).trigger('onload');
+        };
+        reader.readAsArrayBuffer(fileData);
+    };
+
+    if (typeof FileReader.prototype.readAsBinaryString === 'undefined') {
+        FileReader.prototype.readAsBinaryString = readAsBinaryStringIEFunc;
+    }
+});