From 1a8a3c5b1d8b8d0a73b021d597b65d8cf09cde72 Mon Sep 17 00:00:00 2001
From: Serdar Dogruyol <dogruyolserdar@gmail.com>
Date: Sun, 16 Sep 2018 15:34:43 +0300
Subject: [PATCH] Add cache size limit check to caching routes

---
 src/kemal/route_handler.cr | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/kemal/route_handler.cr b/src/kemal/route_handler.cr
index 2e3ea3b..233289e 100644
--- a/src/kemal/route_handler.cr
+++ b/src/kemal/route_handler.cr
@@ -4,7 +4,8 @@ module Kemal
   class RouteHandler
     include HTTP::Handler
 
-    INSTANCE = new
+    INSTANCE            = new
+    CACHED_ROUTES_LIMIT = 1024
     property routes, cached_routes
 
     def initialize
@@ -33,7 +34,11 @@ module Kemal
 
       route = @routes.find(lookup_path)
 
-      @cached_routes[lookup_path] = route if route.found?
+      if route.found? && @cached_routes.size < CACHED_ROUTES_LIMIT
+        @cached_routes[lookup_path] = route
+      else
+        @cached_routes.clear
+      end
 
       route
     end