Example of how to use Sente and Jetty 9 via `ring-jetty9-adapter`

sente-ring-jetty9-adapter-example.clj

;; Example courtesy of @wavejumper

(ns sente-ring-jetty9-adapter-example
  (:require [compojure.core :refer :all]
            [compojure.route :as route]
            [ring.middleware.defaults :as ring.defaults :refer [wrap-defaults]]
            [ring.middleware.session.memory :as mem]
            [ring.adapter.jetty9 :as jetty]
            [taoensso.sente :as sente]
            [taoensso.sente.server-adapters.jetty9 :as adapters.jetty9]))

(let [{:keys [ch-recv send-fn connected-uids
              ajax-post-fn ajax-get-or-ws-handshake-fn]}
      (sente/make-channel-socket! (adapters.jetty9/get-sch-adapter) {})]

     (def ring-ajax-post                ajax-post-fn)
     (def ring-ajax-get-or-ws-handshake ajax-get-or-ws-handshake-fn)
     (def ch-chsk                       ch-recv) ; ChannelSocket's receive channel
     (def chsk-send!                    send-fn) ; ChannelSocket's send API fn
     (def connected-uids                connected-uids) ; Watchable, read-only atom
     )

(def session-store
  (mem/memory-store))

(def ws-defaults
  (-> ring.defaults/site-defaults
      (assoc-in [:session :store] session-store)
      (assoc-in [:responses :content-types] false)
      (assoc-in [:session :flash] false)))

(def site-defaults
  (assoc-in ring.defaults/site-defaults [:session :store] session-store))

(defroutes app
 (GET "/" []
   (let [csrf-token (force ring.middleware.anti-forgery/*anti-forgery-token*)]
     (format "<h1>%s</h1>" csrf-token)))
 (POST "/chsk" req (ring-ajax-post req)
 (route/not-found "<h1>Page not found</h1>")))

(def handler
  (wrap-defaults app site-defaults))

(def server
  (jetty/run-jetty handler {:port                 3000
                            :join?                false
                            :websockets           {"/chsk" (wrap-defaults ring-ajax-get-or-ws-handshake ws-defaults)}
                            :allow-null-path-info true}))