section 2 video 5

Author: tlipski

project.clj

@@ -4,7 +4,7 @@
   :license {:name "Eclipse Public License"
             :url "http://www.eclipse.org/legal/epl-v10.html"}
   :plugins [[lein-ring "0.8.7"]]
-  :ring {:handler project1.core/route-handler
+  :ring {:handler project1.core/wrapping-handler
      	 :init project1.core/on-init
          :port 4001
   	 :destroy project1.core/on-destroy}

src/project1/core.clj

@@ -19,6 +19,7 @@
   (println x "Hello, World!"))
 
 (defn test1-handler [request]
+ (throw (RuntimeException. "error!"))
  {:body "test1"})
 
 (defn test2-handler [request]
@@ -30,3 +31,11 @@
   "/test2" (test2-handler request)
   "/test3" (handlers/handler3 request)
   nil))
+
+(defn wrapping-handler [request]
+ (try
+  (if-let [resp (route-handler request)]
+    resp
+    {:status 404 :body (str "Not found: " (:uri request))})
+  (catch Throwable e
+   {:status 500 :body (apply str (interpose "\n" (.getStackTrace e)))})))