Calling a GET with a message body on Firebase

Question

I'm trying to call (from https://firebase.google.com/docs/cloud-messaging/ios/device-group)

Retrieving a notification key
If you need to retrieve an existing notification key, use the notification_key_name in a GET request as shown:

https://fcm.googleapis.com/fcm/notification?notification_key_name=appUser-Chris Content-Type:application/json Authorization:key=API_KEY project_id:SENDER_ID {}

Which looks like a GET with a message body and a content-type (!). If I POST it I get an error about missing notification_key_name. If I GET it using HttpClient It complains about it not being a JSON request and if I force it to have a Content-Type by doing:

_client.DefaultRequestHeaders.TryAddWithoutValidation("Content-Type", "application/json");

it gives me the same error. If I try and send a message body of "{}" with the GET request HttpClient refuses to send it.. Any ideas on how to get this to work?

Answer 1

I couldn't get HttpClient to do this, had to resort to using HttpWebRequest..

var wr = (HttpWebRequest)WebRequest.Create("https://fcm.googleapis.com/fcm/notification?notification_key_name=" + name);
            wr.Method = "GET";
            wr.ContentType = "application/json";
            wr.Headers.Add("Authorization", "key=" + applicationID);
            wr.Headers.Add("project_id", senderId);

            var resp = await wr.GetResponseAsync();
            using (Stream stream = resp.GetResponseStream())
            {
                StreamReader reader = new StreamReader(stream, Encoding.UTF8);
                return reader.ReadToEnd();
            }