How to access ws->getUserData in listen()

[mmoelle1]

Dear community,

is it possible to access ws->getUserData in .listen(...)? I consider listen to be the "constructor" where I can do initialisation tasks that need to be done just once (not at every open() request). I need to pass command-line arguments, that's why I thought listen() would be the right place.

[uNetworkingAB]

You should read the user manual and docs.

I consider listen to be the "constructor"

Of the app, yes. Of websockets, no.

[uNetworkingAB]

Hmm, maybe you talk about the prototype of the JS object that appears in ws->getUserData? There is no prototype, it's just an empty object.

[mmoelle1]

You should read the user manual and docs.

I consider listen to be the "constructor"

Of the app, yes. Of websockets, no.

I should have been more specific here, I am using the C++ API. I actually had looked at the user manual and docs before but could not find a sufficient answer in there. I know how to access ws->getUserData in, say, .message = [](auto *ws, ...) or .open = [](auto *ws) because ws is passed there as a pointer.

However, the signature of listen is like this

.listen(port_value, [](auto* listen_socket)

whereby listen_socket is (to the best of my knowledge) of type us_listen_socket_t. Any help on how to arrive at ws from listen_socket is appreciated.

[uNetworkingAB]

The listen socket doesn't hold or give you WebSockets, you get them in open