what kind of error are you getting?

client.core> @chsk-state
{:type :auto, :open? false, :ever-opened? false, :csrf-token {:host "192.168.1.51", :port 8888}, :last-ws-error {:udt 1593226359007, :ev #object[Event [object Object]]}, :last-close {:udt 1593226359008, :reason :downgrading-ws-to-ajax}, :last-ws-close {:udt 1593226359082, :ev #object[Event [object Object]], :clean? nil, :code nil, :reason nil}}

client.core> (start-client!)
#object[cljs.core.Atom {:val {:type :auto, :open? false, :ever-opened? false, :csrf-token {:host "192.168.1.51", :port 8888}}}]

as you can see i’m trying different IPs as my runtime is in an emulator

based on the network traffic, it looks like my url is being constructed all weird, in the inspector, its trying to connect with ws:///ws?client-id={guid}&csrf-token=….

shouldn’t it be ws:///10.0.2.2:8888?client...

what kind of emulator? android?

it should be ...

where are you seeing it show ws:///ws?client-id={guid}&csrf-token=…. ?

in the emulator

to answer your question, it’s an android emulator

where in the emulator?

using rn

it has a built in inspector

i changed it now and it’s actually sending requests

switched to this

(let [client (sente/make-channel-socket-client!
                "10.0.2.2:8888/ws"
                {:host "10.0.2.2"
                 :port 8888})]

but it’s still not connecting

i'm assuming that if you do nc 127.0.0.1 8888 on your computer (not in the emulator), it connects to something?

do you get any exceptions?

no exceptions

nc 127.0.0.1 8888 hangs

cool

it's just connecting and waiting

which means there's at least a server listening on that port

it's weird that there's no exceptions

if you run nc -l 8889 and then try to connect on port 8889, does anything show up in the terminal running nc -l 8889?

i guess i’m not sure where to find the exception even honestly

oh, so there might be an exception, but just being ignored somewhere

when i run start client it returns me the atom as expected

the atom has information in it which seems to relate to an exception but i can’t get it out

{:type :auto, :open? false, :ever-opened? false, :csrf-token {:type :ws, :host "10.0.2.2", :port 8888}, :last-ws-error {:udt 1593228475869, :ev #object[Event [object Object]]}, :last-close {:udt 1593228475869, :reason :downgrading-ws-to-ajax}, :last-ws-close {:udt 1593228476043, :ev #object[Event [object Object]], :clean? nil, :code nil, :reason nil}, :udt-next-reconnect 1593228498545}

I would think I could do (get-in @chsk-state [:last-ws-error :ev])

but that just returns an object and i can’t use js->clj on it

it definitely keeps trying to connect, i threw in debugging on the server and the requests are coming through, but nothing is happening

maybe it’s the server side not doing something right?

yea, if you're seeing the requests coming through

(let [chsk-server (sente/make-channel-socket-server! (get-sch-adapter) {})

      {: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) ; ChannelSocket's receive channel
  (def chsk-send!                    send-fn) ; ChannelSocket's send API fn
  (def connected-uids                connected-uids)) ; Watchable, read-only atom

(defmulti msg-handler :id)

(defmethod msg-handler :test [event]
  (prn event))

(defmethod msg-handler :notification/register-device-token [{:keys [uid ?data] :as event}]
  (prn "Received device token register request: " event))

(defn wrap-msg-handler
  [event]
  (try
    (msg-handler event)
    (catch Exception e
      (timbre/error e))))

(defonce router_ (atom nil))
(defn stop-router! [] (when-let [stop-fn @router_] (stop-fn)))
(defn start-router! []
  (stop-router!)
  (reset! router_
          (sente/start-server-chsk-router!
           ch-chsk
           wrap-msg-handler)))

that’s my ws server

you might be able to use:

(defn obj->clj [x]
  (reduce (fn [r k] (assoc r k (gobject/get x k)))
          {}
          (js-keys x)))

nothing seems off about the server, but I can't see that it's sending a message back to the client at any point

yeah it doesn’t seem to be sending a response

it’s getting it, and at the right path too

i’ve never seen gobject before, where do i find that

oops, you'll need to require [goog.object :as gobject] to use that

obj->clj is a modified version of https://github.com/clojure/clojurescript/blob/r1.10.773-2-g946348da/src/main/cljs/cljs/core.cljs#L10796

for some reason, js->clj will only convert js objects that return true for (identical? (type x) js/Object)

woot!

> {“message” “Expected HTTP 101 response but was ‘403 Forbidden’“, “eventPhase” 0, “cancelable” false, “currentTarget” nil, “BUBBLING_PHASE” 3, “composed” false, “cancelBubble” false, “isTrusted” false, “returnValue” true, “CAPTURING_PHASE” 1, “AT_TARGET” 2, “initEvent” #object[initEvent], “preventDefault” #object[preventDefault], “timeStamp” 1593228475869, “NONE” 0, “stopPropagation” #object[stopPropagation], “bubbles” false, “type” “error”, “stopImmediatePropagation” #object[stopImmediatePropagation], “target” #object[WebSocket [object Object]], “srcElement” #object[WebSocket [object Object]], “defaultPrevented” false, “composedPath” #object[composedPath]}

I did not expect that

lol me neither, i don’t have any authentication but it leads me into my handlers

looking

hmmm, there's csrf token in the log you showed earlier. I wonder if the fact that the hostname is originally 10.0.2.2 and there's the emulator doing the NAT stuff is causing issues

now we’re getting somewhere, it was definitely me…

(GET "/ws" [req] (ws/ring-ajax-get-or-ws-handshake req))

(GET "/ws" [req] ws/ring-ajax-get-or-ws-handshake)

i was looking in the wrong places 🙂

thank you for helping unwrap that object, that was the key!

🙂

that's always where the bug hide!

🐛

💯

thank you again! i’m on a roll now!

I think my most frequent bug is when JS interop becomes nil. I would use spec to check if the first element is not nil and if it is the interop :> check that the second element is not nil. Does it make sense? I am struggling to test views as well, I like the kamera solution but never had time to dig in into it.

ah doh. I'll remove that then I guess.

you can try setting :fs-watch {:hawk false} in shadow-cljs.edn. maybe it loads then? hawk should only be loaded conditionally anyways and is only used on macos

Oh, you’ve saved my day! Thank you very much, it worked 🙂

you might want to try shadow-cljs for this https://shadow-cljs.github.io/docs/UsersGuide.html#classpath-js

otherwise working with JS files in CLJS is a bit clunky

ultimately it seems like my async channel is not getting flushed somewhere or the channel is shutting down, i can’t tell. when i send my message server side via (chsk-send! "abc" [:notification/device-registered "abc"] {:flush? true}) and I’m not hooked up to the channel yet client-side, once i do spin up the sente router, it spits it and any other messages queued up out, but any additional messages are lost

is the router a server side thing or a client side thing?

I have one both sides but the client is the one that doesn't receive the event

the server router does

how are you seeing the messages before your router is started?

I'm running the above send from the server repl

> it spits it and any other messages queued up out, but any additional messages are lost what is "it"? are you seeing any messages on the client, or just sometimes?

sorry, my repl

how is the repl printing the messages?

via prn

that’s the top half of the block in the op

i don't see any issues

what's the client environment like?

is it on android within a browser?

or within an android app running javascript?

if possible, I would try running the javascript on your local computer in Chrome or Firefox since they have pretty good inspectors

that can give you more information about what's happening with the websocket connection itself

what’s the quickest way to spin up a browser-based repl?

it is android via rn

I haven't used a cljs repl in a while, so I'm not sure

prn will print to the browser console though

and both chrome and firefox has inspectors that show websocket connections which includes their state and the messages that have been sent/received

prn is printing to my repl though

from the browser? then it seems like you're all set

no, that’s what i mean by “it spitting out”, it works and prints to my repl, but only when i build up a queue then connect from the client

if i connect from the client, then send a message from the server, the message never shows up client side

tried it again in a browser-based repl and got the same results

i only see messages when i start the router

what do you see in the inspector?

are the messages arriving? does the connection get closed?

looks like it could be as simple as I don't know my way around aaync well enough yet. it seems like the call to send is usually inside a go block but I tried my own attempt by literally just running the same send command inside a go from the server repl but it still didn't come through

it doesn't appear the messages are arriving

if you could help me write what a call using a go block from the repl would look like, I'm stumped!

code inside a go block will just get executed in a green thread

i'm not sure if send has a return value, but you should be able to run it outside of a go block without issue

you can see more clearly the behavior of what’s happening here in the browser. the server starts talking immediately doing a handshake, and a few pings, but when i start the client router, nothing else is received from the server. it’s the same story for as long as the client’s router is up.

figured it out….it was the version of async…the sente version is seemingly incompatible with newer versions of async

that's a pretty tough bug. glad you figured out a solution!

thanks for the support @U7RJTCH6J!