diff --git a/src/utils/file-config.js b/src/utils/file-config.js
index 0662cde..457655d 100644
--- a/src/utils/file-config.js
+++ b/src/utils/file-config.js
@@ -9,12 +9,12 @@ export default {
   },
   // 预览文件的url
   previewUrl: function(username, file, token) {
+    let path = "/"
+    if (file.path.length > 1) {
+      path = encodeURI(file.path.substr(1, file.path.length - 2))
+    }
+    const filename = encodeURI(file.name);
     if (token) {
-      let path = "/"
-      if (file.path.length > 1) {
-        path = encodeURI(file.path.substr(1, file.path.length - 2))
-      }
-      const filename = encodeURI(file.name);
       return `${this.baseUrl}/file/${username}/${path}/${filename}?jmal-token=${token}`
     } else {
       return `${this.baseUrl}/file/${username}/${path}/${filename}`