how to create ws nats server in go and connect

[Burak Akça]

I want to create websocket nats server and i'm using this example

- I change this example with below code;

tlsConfig := &tls.Config{

Certificates: certs,

}

opts := &server.Options{}

opts.Websocket.Host = "127.0.0.1"

opts.Websocket.TLSConfig = tlsConfig

opts.Websocket.Port = 8080

ns, err := server.NewServer(opts)

sudo lsof -i:8080

main    1081038 burak   10u  IPv4 4243850      0t0  TCP localhost:http-alt (LISTEN)

But when i want to connect to this server  from browser (nats.ws), i get this;

ws_transport.js?2234:73 WebSocket connection to 'wss://0.0.0.0:8080/' failed:
eval @ ws_transport.js?2234:73
eval @ ws_transport.js?2234:22
__awaiter @ ws_transport.js?2234:18
connect @ ws_transport.js?2234:56
eval @ protocol.js?2766:183
eval @ protocol.js?2766:8
__awaiter @ protocol.js?2766:4
dial @ protocol.js?2766:178
eval @ protocol.js?2766:244
fulfilled @ protocol.js?2766:5
ws_transport.js?2234:124 Uncaught (in promise) NatsError
    at socket.onerror (ws_transport.js?2234:124:1)

[Alberto Ricart]

What version of the library are you running? Also make sure that your certificates are trusted by the browser. If you catch the error, do you get a better exception?

[iv...@synadia.com]

I would instead generate the TLS configuration with something like that:

```

tc := &TLSConfigOpts{

CertFile: "../test/configs/certs/server-cert.pem",

KeyFile: "../test/configs/certs/server-key.pem",

CaFile: "../test/configs/certs/ca.pem",

}

tlsConfig, err := GenTLSConfig(tc)

```

And be advised that NewServer() is not enough, you also need to call Start(), but I assume that you do that since you pointed at an example code that does it.

[Burak Akça]

- github.com/nats-io/nats-server/v2 v2.8.4

- "nats.ws": "1.9.0"

Certificates created with mkcert 

[Alberto Ricart]

You can try this gist https://gist.github.com/aricart/6b7d77cf7b494fd25b091f134f76513c