使用cookie中getRefer方法

@@ -23,13 +23,7 @@ const SIGNIN_LEFT_BANNER_CODE = 'db350894e01e90eac55cd3a13ad77331';
 // 第三方登录回调
 function doPassportCallback(req, res, user) {
     let shoppingKey = cookie.getShoppingKey(req);
-    let refer = req.cookies.refer;
-
-    if (refer) {
-        refer = decodeURI(req.cookies.refer);
-    } else {
-        refer = config.siteUrl;
-    }
+    let refer = cookie.getRefer(req, config.siteUrl);
 
     if (/sign|login/.test(refer)) {
         refer = config.siteUrl;
@@ -77,6 +71,7 @@ const common = {
         if (!refer) {
             refer = req.get('Referer');
         }
+
         refer && res.cookie('refer', encodeURI(refer), {
             domain: 'yohobuy.com'
         });