解决lru内存占用过大问题

@@ -2,6 +2,7 @@ const fs = require('fs');
 const path = require('path');
 const rp = require('request-promise');
 const LRU = require('lru-cache');
+const url = require('url');
 const _ = require('lodash');
 const pkg = require('../../package.json');
 const logger = global.yoho.logger;
@@ -15,22 +16,27 @@ const routes = [
     },
     {
         route: '/channel',
+        cacheRule: 'pathname',
         cache: true
     },
     {
         route: '/channel/search',
+        cacheRule: 'pathname',
         cache: true
     },
     {
         route: '/channel/men',
+        cacheRule: 'pathname',
         cache: true
     },
     {
         route: '/channel/women',
+        cacheRule: 'pathname',
         cache: true
     },
     {
         route: '/about',
+        cacheRule: 'pathname',
         cache: true
     },
 ];
@@ -40,7 +46,7 @@ let renderer;
 let template = fs.readFileSync(path.join(__dirname, '../../src/index.html'), 'utf-8');
 
 const microCache = LRU({ // eslint-disable-line
-    max: 10000,
+    max: 1000,
     maxAge: 2000
 });
 
@@ -60,10 +66,12 @@ const getContext = (req) => {
     };
 };
 
-const render = (options) => {
+const render = ({cache, cacheRule}) => {
     return (req, res, next) => {
-        if (options.cache) {
-            const html = microCache.get(req.url);
+        const reqUrl = url.parse(req.url);
+
+        if (cache && reqUrl[cacheRule]) {
+            const html = microCache.get(reqUrl[cacheRule]);
 
             if (html) {
                 console.log('cache', req.url);
@@ -77,8 +85,8 @@ const render = (options) => {
                 // TODO 处理错误类型
                 return next(err);
             }
-            if (options.cache) {
-                microCache.set(req.url, html);
+            if (cache && reqUrl[cacheRule]) {
+                microCache.set(reqUrl[cacheRule], html);
             }
             return res.send(html);
         });
@@ -154,9 +162,7 @@ module.exports = async (app) => {
     await loadBundle();
     _.each(routes, r => {
         if (!r.disable) {
-            app.get(r.route, ssrRender({
-                cache: r.cache
-            }));
+            app.get(r.route, ssrRender(r));
         }
     });
 };