jle
Hi, I have a problem in one computer with applications running liveview
It has to be a problem with my computer configuration
The same application running on different computers works perfectly
I also ran the examples from Chris McCord with same problem
All these worked some days ago
I tested with firefox and chrome with same behaviour
I tested with elixir 12 and 13. No surprises it didn’t work with both, I’m sure it has to be a configuration problem in my computer
My question is about how to try to debug this issue
I added this trace on mount
def mount(_params, _session, socket) do
...
Logger.info("_____________ connected?(socket) #{connected?(socket)}")
...
and this is the output
[info] Running DemoWeb.Endpoint with cowboy 2.9.0 at 0.0.0.0:4000 (http)
[info] Access DemoWeb.Endpoint at http://localhost:4000
[watch] build finished, watching for changes...
[info] CONNECTED TO Phoenix.LiveView.Socket in 64µs
Transport: :websocket
Serializer: Phoenix.Socket.V2.JSONSerializer
Parameters: %{"_csrf_token" => "bDccJkAePU00HgMdJj8GPgAgNFgqXBwXYm-OmNl4UXdHkG4VthU6L6xg", "vsn" => "2.0.0"}
[info] GET /
[debug] Processing with Phoenix.LiveView.Plug.Elixir.DemoWeb.ImageLive/2
Parameters: %{}
Pipelines: [:browser]
[info] _____________ connected?(socket) false
[info] Sent 200 in 68ms
[info] CONNECTED TO Phoenix.LiveView.Socket in 53µs
Transport: :websocket
Serializer: Phoenix.Socket.V2.JSONSerializer
Parameters: %{"_csrf_token" => "RH4FFgYQDjAOXy1QBidWKAVzFgIDLC4n450cwzwahoHbuU7EwGSKdJB_", "vsn" => "2.0.0"}
Any tip of how could I investigate where the problem is?
Thanks (marvellous language, phoenix is impressive, nice community… congrats!!!)
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jle
I’ve put a breakpoint in app.js, all code is executed with no errors
wanton7
Run just
liveSocketis it typeLiveSocket?jle
You are right, I have an error on browser console when I try
But if I run
It returns
I putted a breakpoint on LiveSocket constructor, and all lines were executed with no errors
jle
I tested with firefox and chromium
No plugins installed, no extensions, no ad blockers
On server side, nothing different on log, no errors, nothing different
On browser, there are no errors con console
I debugged the LiveSocket creation on browser, it executed all lines, no errors reported
The computer with the problem is running manjaro.
wanton7
One clue here is that you don’t have liveSocket variable available in your console. I created a default Phoenix 1.6 app without Ecto. If I go to 127.0.0.1 liveSocket variable exists in Chrome Developer tools console. Are you sure app.js is loaded? Check Chrome Developer tools Network tab and make sure it’s actually loaded by the browser.
As a side note even if you said you didn’t use Brave browser, but as a warning it has known issue with WebSockets. WebSockets sometimes hang in that browser and I think you have to close the whole browser to get them working again.
axelson
Can you answer/check these as well? Also on the computer that isn’t working what OS are you running, what version of nodejs (if applicable), are there any errors in the js console, and is the live view websocket being established?
jle
I tested with ports 4002, 4003 and 4050 and same behaviour on all of them
Phoenix works as it serves pages, but liveview doesn’t work
wanton7
You don’t happen to have anything else running in port 4000 in that machine? Try running Phoenix in different port than default 4000 and see what happens.
jle
This is one machine that works normally
This is in the machine that fails
The machine that works, is a fresh installation (few days ago)
The other one, is a rolling release. On this machine, everything was working fine with phoenix/liveview till some days ago
I have no clue of what happened
And I didn’t detect any other fail on this machine. Everything looks working fine the only problem I detected, is this with phoenix/liveview
wanton7
I also asked to check Erlang/OTP versions, are they same?