Ring adapter for Jetty 9 with WebSocket support which means you can use WebSocket in your Clojure application without pain.
In the REPL:
(require '[ring.adapter.jetty9 :refer [run-jetty]])
(run-jetty app {:port 50505}) ;; same as the 'official' adapter of jetty 7
In ns declaration:
(ns my.server
(:require [ring.adapter.jetty9 :refer [run-jetty]]))
You can define following handlers for websocket events.
(def ws-handler {:on-connect (fn [ws])
:on-error (fn [ws e])
:on-close (fn [ws status-code reason])
:on-text (fn [ws text-message])
:on-bytes (fn [ws bytes offset len])})
WebSocketProtocol allows you to read and write data on the ws
value:
- (send! ws msg)
- (close! ws)
- (remote-addr ws)
- (idle-timeout! ws timeout)
Notice that we support different type of msg:
- byte[] and ByteBuffer: send binary websocket message
- String and other Object: send text websocket message
- (fn [ws]) (clojure function): Custom function you can operate on Jetty's RemoteEndpoint
There is a new option :websockets
available. Accepting a map of context path and listener class:
(use 'ring.adapter.jetty9)
(run-jetty app {:websockets {"/loc" ws-handler}})
In the javascript:
// remember to add the trailing slash.
// Otherwise, jetty will return a 302 on websocket upgrade request,
// which is not supported by most browsers.
var ws = new WebSocket("ws://somehost/loc/");
ws.onopen = ....
Copyright © 2013-2014 Sun Ning
Distributed under the Eclipse Public License, the same as Clojure.