How can i do xmpp push notifications to Firebase?

Questions / Help
1

Hi, is there any tutorials or guide for implements push notifications to Firebase using XMPP?

Thanks!

1 Like
2

Try to use Romeo.

1 Like
3

Hi, I have the same question, just more concrete. How would I go about constructing xml for the fcm message in Romeo. Say for instance something like this:

<message id="">
  <gcm xmlns="google:mobile:data">
  {
      "to":"REGISTRATION_ID",  // "to" replaces "registration_ids"
      "message_id":"m-1366082849205" // new required field
      "data":
      {
          "hello":"world",
      }
      "time_to_live":"600",
      "delay_while_idle": true/false,
      "delivery_receipt_requested": true/false
  }
  </gcm>
</message>
4

The documentation from firebase specifies that all you have to do, is to send the <gcm>...</gcm> part in a classic message stanza.

So you’ll need Romeo.Stanza.message/1:

:ok = Conn.send(pid, Stanza.message(gcm_xml))
5

Oh, ok, so I can just pass xml as a string/binary to this method? Missed it, i was trying all the time with https://hexdocs.pm/romeo/Romeo.Stanza.html#message/3.

Thanks

6

As a side note Discord did a great blog post about how they use firebase for push notifications. It’s got good examples of using GenStage.

7

Thanks, I’m pretty new to elixir and still don’t completely understand stuff about GenServer, but that blog post is how I got the idea for using xmpp for sending push notifcations, since http is too slow for my needs, and there is no sign yet of http2 for firebase…

8

Finally got to trying out the https://hexdocs.pm/romeo/Romeo.Stanza.html#message/1 method, but don’t think just passing xml works. The Stanza.message/1 method checks if message passed is a map and sends it to Stanza.message/3:

def message(msg) when is_map(msg) do
  message(msg["to"], msg["type"], msg["body"])
end
def message(to, type, message) do
  xmlel(name: "message",
    attrs: [
      {"to", to},
      {"type", type},
      {"id", id},
      {"xml:lang", "en"}
    ],
    children: generate_body(message))
end

And if i try to pass in raw xml into as message, it gets wrapped in body element and i receive InvalidJson : MissingPayload from fcm. Is there a way to send a message without it being parsed?

9

@callmeahab,

Author of Romeo here. All you need to do is write a function that generates the appropriate XML data structure using the records from the Romeo.XML module.

Something like this (to match the message you mentioned above):

use Romeo.XML

def gcm(json_string) do
  xmlel(name: "message",
    attrs: [{"id", ""}],
    children: [
      xmlel(name: "gcm",
        attrs: [{"xmlns", "google:mobile:data"}],
        children: [
          xmlcdata(content: json_string)
        ]
    ])
end

Then send it like so:

json = Poison.encode!(%{...})
:ok = Romeo.Connection.send(pid, gcm(json))

Hope this helps…

10

Thanks a lot.

11

I used ZetPush https://zetpush.com/ and worked just fine for me.