[FEATURE] Support Unix Domain Sockets

[F1bonacc1]

Is there an existing feature request for this?

• I have searched the existing feature requests

Is your feature request related to a problem? Please describe.

Using UNIX Domain Sockets (UDS) allows more flexibility in avoiding multiple projects (on the same host) collisions.
See here: F1bonacc1/process-compose#172

Describe the solution that you would like.

I am planning to implement both port and UDS based communication.
A user flag will select this.
I would like to be able to do something along the following lines:

var ws *websocket.Conn
if UDS {
  ws, _, err = websocket.DefaultDialer.DialUnix("ws://unix/hello", "/tmp/path.sock", nil)
}else{
  ws, _, err = websocket.DefaultDialer.Dial("ws://localhost:8080/hello", nil)
}
ws.WriteMessage(...)

Describe alternatives you have considered.

No response

Anything else?

No response

[F1bonacc1]

Hey @greenmarmot,
Thanks for the quick response.
The Dialer.NetDialContext returns *net.Conn while the API works with *wbsocket.Conn. Is there a way to bridge or convert those?

[jaitaiwan]

wbsock.Conn contains a net.Conn

[F1bonacc1]

Yes, there is a private method newCon that receives net.Conn and returns websocket.Conn.

[F1bonacc1]

OK Figured it out:

d := websocket.Dialer{
	NetDialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
		return (&net.Dialer{}).DialContext(ctx, "unix", "/tmp/process-compose.sock")
	},
}
ws, _, err := d.Dial("ws://unix/hello", nil)

Maybe it will be useful to someone else.