在clojure中使用sente Packers.Transition/get-transit packer时，事件“~#chsk/握手”无效
在clojure中使用sente Packers.Transition/get-transit packer时，事件“~#chsk/握手”无效
提问于 2020-03-31 09:26:54
我在使用sente时收到一个错误，导致从客户端向服务器发送信息时失败，反之亦然。问题似乎是握手失败并出现错误
cljs$core$ExceptionInfo
message: "Invalid event"
data: {:given "~:chsk/handshake", :errors {:wrong-type {…}}}连续的ws/ping也失败，具有相同的错误但具有额外的信息，
sente.cljc:142 Uncaught #error {:message "Invalid event", :data {:given "~#'", :errors {:wrong-type
{…}[:expected :vector]
[:actual {:type #object[String], :value "~#'"}]可能的问题是什么，我的代码看起来没有问题，并且遵循发送的default example。
预期行为：
发送将连接，我将能够调用send-fn并成功地在服务器和客户端之间发送消息。
编辑:添加注释中建议的代码：
(require '[taoensso.sente.server-adapters.aleph :refer (get-sch-adapter)])
;; Create Websocket connection in server
(let [packer (sente-transit/get-transit-packer)
chsk-server (sente/make-channel-socket-server! (get-sch-adapter) {:packer packer
:csrf-token-fn nil})
{:keys [ch-recv send-fn connected-uids ajax-post-fn ajax-get-or-ws-handshake-fn]} chsk-server]
(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)
(def chsk-send! send-fn)
(def connected-uids connected-uids));; Start the web server
(defn start-web-server! [& [port]]
(stop-web-server!)
(let [port (or port default-port)
ring-handler (var main-ring-handler)
[port stop-fn]
(let [server (aleph/start-server ring-handler {:port port})
p (promise)]
(future @p)
[(aleph.netty/port server)
(fn [] (.close ^Closeable server) (deliver p nil))])
uri (format "http://localhost:%s/" port)]
(infof "Web server is running at `%s`" uri)
(reset! web-server_ {:port port :stop-fn stop-fn})
(try
(if (and (Desktop/isDesktopSupported)
(.isSupported (Desktop/getDesktop) Desktop$Action/BROWSE))
(.browse (Desktop/getDesktop) (URI. uri))
(.exec (Runtime/getRuntime) (str "xdg-open" uri)))
(Thread/sleep 7500)
(catch HeadlessException _))))在客户端：
(let [packer (sente-transit/get-transit-packer)
{:keys [chsk ch-recv send-fn state]}
(sente/make-channel-socket-client! "/chsk"
{:type :auto
:packer packer})]
(def chsk chsk)
(def ch-chsk ch-recv)
(def chsk-send! send-fn)
(def chsk-state state));; start the router
(defn start-router! []
(stop-router!)
(reset! router_ (sente/start-client-chsk-router! ch-chsk event-msg-handler)))编辑，添加
我已经注意到这个错误只存在于我使用打包器时，(packers.transit/get-transit-packer)而不是:edn
回答 2
Stack Overflow用户
回答已采纳
发布于 2020-04-01 13:39:02
今天碰巧遇到了这个问题，所以在这个问题之后我有点挠头了，会不会是这个库没有太多的活动/是稳定的？
不是的。我只是忘记了包含[com.cognitect/transit-cljs "0.8.256"]类依赖项！
这个例子发出了警告：https://github.com/ptaoussanis/sente/blob/master/example-project/src/example/client.cljs#L47
Stack Overflow用户
发布于 2020-03-31 12:01:58
不是一个确切的答案，但我们要看看你的代码。这里会产生"Invalid event“错误：
(defn validate-event
"Returns nil if given argument is a valid [ev-id ?ev-data] form. Otherwise
returns a map of validation errors like `{:wrong-type {:expected _ :actual _}}`."
[x]
(cond
(not (vector? x)) {:wrong-type (expected :vector x)}
(not (#{1 2} (count x))) {:wrong-length (expected #{1 2} x)}
:else
(let [[ev-id _] x]
(cond
(not (keyword? ev-id)) {:wrong-id-type (expected :keyword ev-id)}
(not (namespace ev-id)) {:unnamespaced-id (expected :namespaced-keyword ev-id)}
:else nil))))
```页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/60942041
复制相关文章
相似问题
腾讯云开发者
