Presence enter error coming

[gouravgupta72]

Hi Folks,

When i'm calling enter presence then it is giving an error

presence.enter(nil) { error in
guard error == nil else {
self.signalError(error!)
return
}
}

ARTErrorInfo with code 13, message: attempted to publish presence message without clientId, reason: (null)

[ricardopereira]

Hello @gouravgupta72. You need to provide a cliendId.

In order to be present on a channel, a client must be identified by having a client ID, have permission to be present, and be attached to the channel. Ably Docs

[gouravgupta72]

Hi I tried subscribe channel and then enter presence still getting the same error, we are using token authentication.

guard let channel = self.channel else { return }
let presence = channel.presence

    channel.attach(){ error in
    }
    presence.subscribe(self.membersChanged)
    channel.subscribe(self.receiveMessage)
    delay(1.0) {
        presence.enter("") { error in
            guard error == nil else {
                self.signalError(error!)
                return
            }
        }
    }

[funkyboy]

@gouravgupta72 Thanks for getting in touch. A few questions.

Enable logging

Can you please enable a more verbose logging to see what's going on?

options.logLevel = .verbose
let client = ARTRealtime(options: options)

Log errors (if any)

Can you please check if there's any error along the way? E.g.

channel.attach(){ error in
  // print error here if not nil
}

Provide a clientId

Does your instance of ARTRealtime have a clientId set? E.g.

options.clientId = "myClientId"

[gouravgupta72]

hey,
i got the error and now it working.
Thanks for the help.

[gouravgupta72]

Hi Folks,

When i'm trying to update user presence from my code no action is having, when doing the same from ably consol it's working fine.

let channel = realtime.channels.get("ate-dad-fly")
channel.presence.subscribe(.Enter) { member in
print("Member (member.clientId) entered")
}
channel.presence.enter(nil)

Can you please help me in getting update user presence?

[funkyboy]

@gouravgupta72 your code looks fine. For sake of completeness it should be something like

let options = ARTClientOptions(key: "YOUR_API_KEY")
options.clientId = "bob"
let realtime = ARTRealtime(options: options)
let channel = realtime.channels.get("dot-jaw-bye")
channel.presence.subscribe(.Enter) { member in
    print("Member \(member.clientId) entered")
}
channel.presence.enter(nil)

Are you using the same api key both in your code and in the Ably console?

[gouravgupta72]

We are doing authentication using JWT token, so in app i can't assign clientId, when i'm trying to do so it is not getting connected to chat.

[funkyboy]

@gouravgupta72 With JWT you can use a clientId. See the documentation here: https://www.ably.io/tutorials/jwt-authentication

UPDATE: The key for the clientId in the JWT claim is x-ably-clientId

[gouravgupta72]

Hey @funkyboy ,

this is the debug log we are getting

"token":{"token":"key_name-S3bidW4uF8zqqm_AwKRXPNQdvR7QCOoryx9ocl62tXhTiRWRqwkSUpqSDmCjAMoqOhA9HezDHtRN2kTqlbGfghpNjolzb4WYwWolSMAL4FlJ749thea6d4BtVAjxyfAXf559_DA---SrFNgUSoyUA","keyName":"key_name.P__eEQ","issued":1533624962493,"expires":1533628562493,"capability":"{"*":["publish","subscribe"]}","clientId":"Bob"}}

It is showing that client id is assign to my token, but when i'm trying to enter my presence i'm still not able to see it in dev consol.

Only 1 member is showing for which i added presence from dev consol.

[funkyboy]

@gouravgupta72 I think that's because you don't have capabilities for presence. See docs here: https://www.ably.io/documentation/general/authentication#capabilities-explained
So you should have something like:

"capability":"{"*":["publish","subscribe","presence"]}"

[gouravgupta72]

Thanks for the help.

It worked.