Authenticating with a Token
Tokens are basically random strings, much like a password, and can provide a simple authentication mechanism in some situations. However, tokens are only as safe as they are secret so other authentication schemes can provide more security in large installations. It is highly recommended to use one of the other NATS authentication mechanisms.
For this example, start the server using:
nats-server --auth mytoken
The code uses localhost:4222 so that you can start the server on your machine to try them out.
Go
Java
JavaScript
Python
Ruby
C
// Set a token
nc, err := nats.Connect("127.0.0.1", nats.Name("API Token Example"), nats.Token("mytoken"))
if err != nil {
log.Fatal(err)
}
defer nc.Close()
// Do something with the connection
Options options = new Options.Builder().
server("nats://localhost:4222").
token("mytoken"). // Set a token
build();
Connection nc = Nats.connect(options);
// Do something with the connection
nc.close();
const nc = await connect({
port: ns.port,
token: "aToK3n",
});
nc = NATS()
await nc.connect(servers=["nats://demo.nats.io:4222"], token="mytoken")
# Do something with the connection.
NATS.start(token: "mytoken") do |nc|
puts "Connected using token"
end
natsConnection *conn = NULL;
natsOptions *opts = NULL;
natsStatus s = NATS_OK;
s = natsOptions_Create(&opts);
if (s == NATS_OK)
s = natsOptions_SetToken(opts, "mytoken");
if (s == NATS_OK)
s = natsConnection_Connect(&conn, opts);
(...)
// Destroy objects that were created
natsConnection_Destroy(conn);
natsOptions_Destroy(opts);
Some client libraries will allow you to pass the token as part of the server URL using the form:
nats://token@server:port
Again, once you construct this URL you can connect as if this was a normal URL.
Go
Java
JavaScript
Python
Ruby
C
// Token in URL
nc, err := nats.Connect("[email protected]")
if err != nil {
log.Fatal(err)
}
defer nc.Close()
// Do something with the connection
Connection nc = Nats.connect("nats://[email protected]:4222");//Token in URL
// Do something with the connection
nc.close();
// JavaScript doesn't support tokens in urls use the `token` option
nc = NATS()
await nc.connect(servers=["nats://[email protected]:4222"])
# Do something with the connection.
natsConnection *conn = NULL;
natsOptions *opts = NULL;
natsStatus s = NATS_OK;
s = natsOptions_Create(&opts);
if (s == NATS_OK)
s = natsOptions_SetURL(opts, "nats://[email protected]:4222");
if (s == NATS_OK)
s = natsConnection_Connect(&conn, opts);
(...)
// Destroy objects that were created
natsConnection_Destroy(conn);
natsOptions_Destroy(opts);
Last modified 1yr ago