core.clj

(ns clojurebyexample.core)

(ns static-files.handler
  (:use compojure.core)
  (:require [compojure.handler :as handler]
            [compojure.route :as route]))

(def root (str (System/getProperty "user.dir") "/output"))

(defroutes app-routes
  (GET "/" [] "Hello World")
  (route/files "/" (do (println root) {:root root}))
  (route/resources "/")
  (route/not-found "Not Found"))

(def app
  (handler/site app-routes))

exception

tarted server on port 3000
java.lang.NullPointerException: null
                                          reload.clj:18 ring.middleware.reload/wrap-reload[fn]
                                      stacktrace.clj:17 ring.middleware.stacktrace/wrap-stacktrace-log[fn]
                                      stacktrace.clj:80 ring.middleware.stacktrace/wrap-stacktrace-web[fn]
                                           jetty.clj:18 ring.adapter.jetty/proxy-handler[fn]
                                       (Unknown Source) ring.adapter.jetty.proxy$org.eclipse.jetty.server.handler.AbstractHandler$0.handle
                                HandlerWrapper.java:116 org.eclipse.jetty.server.handler.HandlerWrapper.handle
                                        Server.java:363 org.eclipse.jetty.server.Server.handle
                        AbstractHttpConnection.java:483 org.eclipse.jetty.server.AbstractHttpConnection.handleRequest
                        AbstractHttpConnection.java:920 org.eclipse.jetty.server.AbstractHttpConnection.headerComplete
                        AbstractHttpConnection.java:982 org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete
                                    HttpParser.java:635 org.eclipse.jetty.http.HttpParser.parseNext
                                    HttpParser.java:235 org.eclipse.jetty.http.HttpParser.parseAvailable
                            AsyncHttpConnection.java:82 org.eclipse.jetty.server.AsyncHttpConnection.handle
                         SelectChannelEndPoint.java:628 org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle
                          SelectChannelEndPoint.java:52 org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run
                              QueuedThreadPool.java:608 org.eclipse.jetty.util.thread.QueuedThreadPool.runJob
                              QueuedThreadPool.java:543 org.eclipse.jetty.util.thread.QueuedThreadPool$3.run
                                        Thread.java:744 java.lang.Thread.run

project.clj

(defproject clojurebyexample "0.1.0-SNAPSHOT"
  :description "FIXME: write description"
  :url "http://example.com/FIXME"
  :license {:name "Eclipse Public License"
            :url "http://www.eclipse.org/legal/epl-v10.html"}
  :plugins [[lein-marginalia "0.7.1"] [lein-ring "0.8.8"] [compojure "1.1.6"]]
  :ring {:handler clojurebyexample.core/static-files.handler.app}
  :dependencies [[org.clojure/clojure "1.5.1"]])