FCM connection

[callmeahab]

Hi,

I'm pretty new to XMPP, so this question might be a bit dumb, but I'm having issue connecting to firebase cloud messaging. I'm currently doing:

    opts = [
      jid: "#{sender_id}@gcm-preprod.googleapis.com",
      password: fcm_server_key,
      host: "gcm-preprod.googleapis.com",
      port: 5236,
      legacy_tls: true,
      require_tls: true,
      preferred_auth_mechanisms: ['PLAIN']
    ]

    {:ok, pid} = Conn.start_link(opts)

    case Conn.send(pid, Stanza.presence) do
      {:error, :closed} ->
        IO.puts(:closed)
      :ok ->
        IO.puts(:ok)
    end

And I'm getting the error:

GenServer #PID<0.193.0> terminating
** (Romeo.Auth.Error) Failed to authenticate using mechanism: "PLAIN"
    (romeo) lib/romeo/auth.ex:64: Romeo.Auth.do_authenticate/2
    (romeo) lib/romeo/transports/tcp.ex:108: Romeo.Transports.TCP.authenticate/1
    (romeo) lib/romeo/transports/tcp.ex:65: Romeo.Transports.TCP.start_protocol/1
    (romeo) lib/romeo/connection.ex:90: Romeo.Connection.connect/2
    (connection) lib/connection.ex:622: Connection.enter_connect/5
    (stdlib) proc_lib.erl:247: :proc_lib.init_p_do_apply/3
Last message: nil
State: %Romeo.Connection{component: false, features: %Romeo.Connection.Features{amp?: false, compression?: false, mechanisms: [], registration?: false, stream_management?: false, tls?: false}, host: "gcm-preprod.googleapis.com", jid: "####@gcm-preprod.googleapis.com", legacy_tls: true, nickname: "", owner: #PID<0.192.0>, parser: nil, password: "AAAA_GDKHvs:######", port: 5236, preferred_auth_mechanisms: ['PLAIN'], require_tls: true, resource: "", rooms: [], socket: nil, socket_opts: [], ssl_opts: [], stream_id: nil, timeout: 5000, transport: Romeo.Transports.TCP}

It would also help if someone could point me to an example of using fcm xmpp. I'm trying to send push notifications over fcm.

Thanks

[callmeahab]

Ok, figured out the connection issue, was supposed to use gcm.googleapis.com instead of gcm-preprod.googleapis.com.
Would still like help with my second question though.

[scrogson]

Hi @callmeahab, sorry for the delay. I've posted an answer to your question here: https://elixirforum.com/t/how-can-i-do-xmpp-push-notifications-to-firebase/4329/9

[9mm]

Hey @scrogson I have 2 questions for you:

1. Do you know how I could implement "CONNECTION_DRAINING" with Romeo? I realize I'm just parsing the XML, but I'm more concerned about the logistics of the actual connection (search "draining" on https://firebase.google.com/docs/cloud-messaging/server)

2. How do I actually 'intercept' and parse all the replies?

This is a super helpful library, thank you so much for making it!