[macOS] Can't establish WebSockets connection, perhaps related to lws_bind_protocol error.

[MarkoCindric-xyz]

Hi there,

I'm struggling to get this software to function as intended with a preexisting LeapJS project I've been working on. Build was successful and binary seems to execute properly, but I get a fairly ambiguous lws_bind_protocol error message when attempting to run the LeapJS project, and Firefox's console reports Firefox can’t establish a connection to the server at ws://127.0.0.1:6437/v6.json. Chromium reports this: WebSocket connection to 'ws://127.0.0.1:6437/v6.json' failed: Error during WebSocket handshake: net::ERR_RESPONSE_HEADERS_TOO_BIG. Any help would be greatly appreciated.

This is what my terminal looks like after running the binary:

[2025/08/10 19:47:21:7714] N: lws_create_context: LWS: 4.4.0-unknown, NET CLI SRV H1 H2 WS SS-JSON-POL ConMon IPV6-on
[2025/08/10 19:47:21:7730] N: [vh|0|default||6437]: lws_socket_bind: source ads 0.0.0.0
[2025/08/10 19:47:21:7731] N: [vh|0|default||6437]: lws_socket_bind: source ads ::
Starting server...
Connected.
[2025/08/10 19:47:26:4653] E: lws_bind_protocol: 0x7fc89e204690 is not in vhost 'default' protocols list
connection established
[2025/08/10 19:47:26:4654] N: Client connect!
New user, need to send the 'version'

Built and running on macOS Ventura 13.7.7.

[MarkoCindric-xyz]

Update: Firefox's network inspector pane shows a failed transfer of v6.json with a status of NS_ERROR_FILE_TOO_BIG, which seems to align somewhat with the Chromium error. Any idea how this might be remedied?

[lab101]

same errors here.
Build on Windows...

[ezekielaquino]

Has anyone resolved this issue?

[lab101]

nope for what it's worth I made a Unity app which has websocket server.

[MarkoCindric-xyz]

Hi all,

I managed to get it working! In my case, it required minor edits to both UltraleapTrackingWebSocket and LeapJS.

I wrote this Gist to outline the process: https://gist.github.com/MarkoCindric-xyz/82c4e920d1cc76affbae88831eba694c

Hope this helps!