use nodejs and clojurescript

create a new project

lein new red-rss

edit core.cljs

move src/core.clj to src/core.cljs

(ns red_rss.core
(:require [cljs.nodejs :as node]))

(def express (node/require "express"))
(def app (express))

(defn -main [& args]
  (. app (get "/" (fn [req res]
                    (. res (send "hello world")))))
   (.log js/console (str "Express server started on port: " (.-port (.address (.listen app 3000))))))

(set! *main-cli-fn* -main)

edit project.clj

(defproject red-rss "1.0.0-SNAPSHOT"
  :description "FIXME: write description"
  :plugins [[lein-cljsbuild "1.0.2"]]
  :dependencies [[org.clojure/clojurescript "0.0-2173"] [org.clojure/clojure "1.5.1"] [org.bodil/cljs-noderepl "0.1.11"]]
  :cljsbuild
    {:builds
     [{:source-paths ["src"],
       :compiler
       {:pretty-print true, :target :nodejs, :optimizations :simple}}]})

compile and run

$ lein deps
$ lein cljsbuild once
$ node target/cljsbuild-main.js