Crash when connecting

[saikyun]

I'm trying to follow along the example. I start a socket repl, and eval the following lines:

(require '[trikl.core :as t])

;; store clients so we can poke at them from the REPL
(def clients (atom []))

;; Start the server on port 1357, as an accept handler just store the client in
;; the atom.
(def stop-server (t/start-server #(swap! clients conj %) 1357))

Then when connecting using telnet localhost 1357 I get the following exception in the repl window:

Exception in server loop #error {
 :cause class java.net.Socket$SocketOutputStream cannot be cast to class java.io.FileOutputStream (java.net.Socket$SocketOutputStream and java.io.FileOutputStream are in module java.base of loader 'bootstrap')
 :via
 [{:type java.lang.ClassCastException
   :message class java.net.Socket$SocketOutputStream cannot be cast to class java.io.FileOutputStream (java.net.Socket$SocketOutputStream and java.io.FileOutputStream are in module java.base of loader 'bootstrap')
   :at [trikl.telnet$send_telnet_command invokeStatic telnet.clj 31]}]
 :trace
 [[trikl.telnet$send_telnet_command invokeStatic telnet.clj 31]
  [trikl.telnet$send_telnet_command doInvoke telnet.clj 31]
  [clojure.lang.RestFn invoke RestFn.java 2442]
  [trikl.telnet$prep_telnet invokeStatic telnet.clj 39]
  [trikl.telnet$prep_telnet invoke telnet.clj 38]
  [trikl.core$start_client invokeStatic core.clj 526]
  [trikl.core$start_client invoke core.clj 524]
  [trikl.core$make_client invokeStatic core.clj 557]
  [trikl.core$make_client doInvoke core.clj 547]
  [clojure.lang.RestFn invoke RestFn.java 442]
  [trikl.core$start_server$fn__599 invoke core.clj 625]
  [clojure.core$binding_conveyor_fn$fn__5754 invoke core.clj 2030]
  [clojure.lang.AFn call AFn.java 18]
  [java.util.concurrent.FutureTask run FutureTask.java 264]
  [java.util.concurrent.ThreadPoolExecutor runWorker ThreadPoolExecutor.java 1128]
  [java.util.concurrent.ThreadPoolExecutor$Worker run ThreadPoolExecutor.java 628]
  [java.lang.Thread run Thread.java 830]]}

I'm on MacOS. Have tried connecting using eshell and shell in emacs, and zsh terminal.

[plexus]

Hi Saikyun,

This is an unfinished research project. It's not ready for general consumption. There's useful code in here but you'll have to dive in and piece it together yourself.

[saikyun]

All right, thanks. Feel free to close the issue. :) Skickat från min iPhone

…

19 aug. 2020 kl. 11:46 skrev Arne Brasseur ***@***.***>:  Hi Saikyun, This is an unfinished research project. It's not ready for general consumption. There's useful code in here but you'll have to dive in and piece it together yourself. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub, or unsubscribe.

[agam]

@saikyun if I may hazard a guess: check your JVM version?

FWIW, I just tried out the following (on a freshly checked out version):

1. Set up basic listener

user=> (def stop-server (t/start-server #(swap! clients conj %) 1357))
#'user/stop-server

2. Connect to it
   (I ran this in a different shell)

telnet localhost 1357

3. Sanity check

user=> clients
#object[clojure.lang.Atom 0x3419e23b {:status :ready, :val [{:socket #object[java.net.Socket 0x34b27915 "Socket[addr=/127.0.0.1,port=53386,localport=1357]"], :in #object[java.net.SocketInputStream 0x29eda4f8 "java.net.SocketInputStream@29eda4f8"], :out #object[java.net.SocketOutputStream 0x1b9776f5 "java.net.SocketOutputStream@1b9776f5"], :size #object[clojure.lang.Atom 0x5e048149 {:status :ready, :val [51 185]}], :screen #object[clojure.lang.Atom 0x79d9214d {:status :ready, :val nil}], :listeners #object[clojure.lang.Atom 0x3d5790ea {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x1dd7796b "trikl.core$make_client$fn__564@1dd7796b"]}}], :input-loop #object[clojure.core$future_call$reify__8439 0x67a3bd51 {:status :ready, :val nil}]} {:socket #object[java.net.Socket 0x57402ba1 "Socket[addr=/127.0.0.1,port=53388,localport=1357]"], :in #object[java.net.SocketInputStream 0x56913163 "java.net.SocketInputStream@56913163"], :out #object[java.net.SocketOutputStream 0x702b06fb "java.net.SocketOutputStream@702b06fb"], :size #object[clojure.lang.Atom 0xa18649a {:status :ready, :val [51 185]}], :screen #object[clojure.lang.Atom 0x5c534b5b {:status :ready, :val nil}], :listeners #object[clojure.lang.Atom 0x396639b {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x2b22a1cc "trikl.core$make_client$fn__564@2b22a1cc"]}}], :input-loop #object[clojure.core$future_call$reify__8439 0x62573c86 {:status :pending, :val nil}]}]}]

4. Show something to this client
   (this example is lifted from the README)

(t/render (last @clients) #_(t/stdio-client)
          [:box {:x 10 :y 5 :width 20 :height 10 :styles {:bg [50 50 200]}}
           [:box {:x 1 :y 1 :width 18 :height 8 :styles {:bg [200 50 0]}}
            [:box {:x 3 :y 1}
             [:span {:styles {:fg [30 30 150]}} "hello\n"]
             [:span {:styles {:fg [100 250 100]}} "  world"]]]])

5. Verify client view
   In the shell with my telnet session, I now see a red square with a blue border and "hello world" in the middle

6. Verify client state

user=> (type (last @clients))
clojure.lang.PersistentArrayMap
user=> (keys (type (last @clients)))
Execution error (IllegalArgumentException) at user/eval627 (REPL:1).
Don't know how to create ISeq from: java.lang.Class
user=> (keys (last @clients))
(:socket :in :out :size :screen :listeners :input-loop)
user=> (:socket (last @clients))
#object[java.net.Socket 0x57402ba1 "Socket[addr=/127.0.0.1,port=53388,localport=1357]"]
user=> (:size (last @clients))
#object[clojure.lang.Atom 0xa18649a {:status :ready, :val [51 185]}]
user=> (:listeners (last @clients))
#object[clojure.lang.Atom 0x396639b {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x2b22a1cc "trikl.core$make_client$fn__564@2b22a1cc"]}}]

(and attempting to show (:screen (@last clients)) will dump "all the noise", if you want to confirm the terminal screen state)

Hope that helps!

[saikyun]

Thanks, I might have used a "strange" jvm version (graalvm dev). :) What version are you on? Den ons 7 okt. 2020 kl 01:45 skrev Agam Brahma <[email protected]>:

…

@saikyun <https://github.com/Saikyun> if I may hazard a guess: *check your JVM version?* FWIW, I just tried out the following (on a freshly checked out version): 1. Set up basic listener user=> (def stop-server (t/start-server #(swap! clients conj %) 1357)) #'user/stop-server 1. Connect to it (I ran this in a different shell) telnet localhost 1357 1. Sanity check user=> clients #object[clojure.lang.Atom 0x3419e23b {:status :ready, :val [{:socket #object[java.net.Socket 0x34b27915 "Socket[addr=/127.0.0.1,port=53386,localport=1357]"], :in #object[java.net.SocketInputStream 0x29eda4f8 ***@***.***"], :out #object[java.net.SocketOutputStream 0x1b9776f5 ***@***.***"], :size #object[clojure.lang.Atom 0x5e048149 {:status :ready, :val [51 185]}], :screen #object[clojure.lang.Atom 0x79d9214d {:status :ready, :val nil}], :listeners #object[clojure.lang.Atom 0x3d5790ea {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x1dd7796b ***@***.***"]}}], :input-loop #object[clojure.core$future_call$reify__8439 0x67a3bd51 {:status :ready, :val nil}]} {:socket #object[java.net.Socket 0x57402ba1 "Socket[addr=/127.0.0.1,port=53388,localport=1357]"], :in #object[java.net.SocketInputStream 0x56913163 ***@***.***"], :out #object[java.net.SocketOutputStream 0x702b06fb ***@***.***"], :size #object[clojure.lang.Atom 0xa18649a {:status :ready, :val [51 185]}], :screen #object[clojure.lang.Atom 0x5c534b5b {:status :ready, :val nil}], :listeners #object[clojure.lang.Atom 0x396639b {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x2b22a1cc ***@***.***"]}}], :input-loop #object[clojure.core$future_call$reify__8439 0x62573c86 {:status :pending, :val nil}]}]}] 1. Show something to this client (this example is lifted from the README) (t/render (last @Clients) #_(t/stdio-client) [:box {:x 10 :y 5 :width 20 :height 10 :styles {:bg [50 50 200]}} [:box {:x 1 :y 1 :width 18 :height 8 :styles {:bg [200 50 0]}} [:box {:x 3 :y 1} [:span {:styles {:fg [30 30 150]}} "hello\n"] [:span {:styles {:fg [100 250 100]}} " world"]]]]) 1. Verify client view In the shell with my telnet session, *I now see a red square with a blue border and "hello world" in the middle* 2. Verify client state user=> (type (last @Clients)) clojure.lang.PersistentArrayMap user=> (keys (type (last @Clients))) Execution error (IllegalArgumentException) at user/eval627 (REPL:1). Don't know how to create ISeq from: java.lang.Class user=> (keys (last @Clients)) (:socket :in :out :size :screen :listeners :input-loop) user=> (:socket (last @Clients)) #object[java.net.Socket 0x57402ba1 "Socket[addr=/127.0.0.1,port=53388,localport=1357]"] user=> (:size (last @Clients)) #object[clojure.lang.Atom 0xa18649a {:status :ready, :val [51 185]}] user=> (:listeners (last @Clients)) #object[clojure.lang.Atom 0x396639b {:status :ready, :val {:resize #object[trikl.core$make_client$fn__564 0x2b22a1cc ***@***.***"]}}] (and attempting to show (:screen ***@***.*** clients)) will dump "all the noise", if you want to confirm the terminal screen state) Hope that helps! — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAS46Z7MISY6UTYNOTRK5FLSJOTZJANCNFSM4QEVOLVQ> .