SALE 来源页面记录 cookie

@@ -27,7 +27,7 @@ const saleModel = require(`${mRoot}/sale`);
  * @param  {[string]} page js文件page名称
  * @return {[type]}
  */
-const _processPublicData = (req, title, page) => {
+const _processPublicData = (req, title, page, backUrl) => {
     return {
         channel: req.yoho.channel,
         renderData: {
@@ -37,7 +37,8 @@ const _processPublicData = (req, title, page) => {
             saleNav: true,
             pageHeader: headerModel.setNav({
                 navTitle: title,
-                navBtn: false
+                navBtn: false,
+                backUrl: backUrl || ''
             }),
             pageFooter: true
         }
@@ -51,12 +52,19 @@ const _processPublicData = (req, title, page) => {
  * @return {[type]}
  */
 let index = (req, res, next) => {
-    let params = _processPublicData(req, 'SALE', 'sale');
+    let refer = req.get('Referer') || 0;
+    let reqPath = req.baseUrl + req.path;
+    let backUrl = refer.indexOf(reqPath) === -1 ? refer : '';
 
     if (['boys', 'girls', 'kids', 'lifestyle'].indexOf(req.yoho.channel) === -1) {
         return next();
     }
 
+    backUrl && res.cookie('saleRefer', backUrl);
+    backUrl = backUrl || req.cookies.saleRefer;
+
+    let params = _processPublicData(req, 'SALE', 'sale', backUrl);
+
     saleModel.getSaleData(params.channel).then((result) => {
 
         // 扩展头部频道选择数据

@@ -21,7 +21,6 @@ exports.setNav = (opt) => {
         navBtn: true          // 顶部下拉菜单选项
     };
 
-
     Object.assign(defaultOpt, opt || {});
 
     if (defaultOpt.navBtn || _.isNull(defaultOpt.navBtn)) {