add audit file log

src/utils/file.js

@@ -55,3 +55,15 @@ export function downBlob (blob, filename) {
     document.body.removeChild(a)
   })
 }
+
+export function sizeFormat (size) {
+  if (size < 1024) {
+    return size + 'B'
+  } else if (size < 1024 * 1024) {
+    return (size / 1024).toFixed(2) + 'KB'
+  } else if (size < 1024 * 1024 * 1024) {
+    return (size / 1024 / 1024).toFixed(2) + 'MB'
+  } else {
+    return (size / 1024 / 1024 / 1024).toFixed(2) + 'GB'
+  }
+}