CODEWITHSUNDEEP
iosxamarinfirebase-cloud-messaging
3axap
3axap

Reputation: 352

Duplicate messages sending in Firebase Cloud Messaging

In our project we use Firebase cloud messaging for push notification and we encountered the problem of duplication of messages. Our process looks as follow:

Xamarin.Firebase.iOS.CloudMessaging 3.1.2

Xamarin.Firebase.iOS.InstanceID 3.2.1

Xamarin.Firebase.iOS.Core 5.1.3

Subscribe user for topic reuqest

POST https://iid.googleapis.com/iid/v1:batchAdd
request body   
{
    "to" : "/topics/test",
    "registration_tokens" : ["..user_registration_token.."]
}

Send notification for topic subscribers request

POST https://fcm.googleapis.com/v1/projects/our_project_id/messages:send
request body
{
    "message":
    {
        "topic":"test",
        "notification":
        {
            "title":"test-6",
            "body":"test-6"
        }
    }
}

POST https://iid.googleapis.com/iid/v1:batchRemove
{
   "to": "/topics/test",
   "registration_tokens" : ["..user_registration_token.."]
}

But, when user login again and request brand new token, device still received push notifications which are sending to the old token, and if we send notifications by the topic such users received duplicate push notifications.

If we try get information for old token from api method

GET https://iid.googleapis.com/iid/info/token.....

we get response

<HTML>
  <HEAD>
    <TITLE>Internal Server Error</TITLE>
  </HEAD>
  <BODY BGCOLOR="#FFFFFF" TEXT="#000000">
    <H1>Internal Server Error</H1>
    <H2>Error 500</H2>
  </BODY>
</HTML>

Upvotes: 1

Views: 1891

Answers (1)

SebManz
SebManz

Reputation: 1

try to add ?details=true to your uri. Be sure to use Authorization key in your header. Output expected is

{ "error": "No information found about this instance id." }

or

{
    "application": "com.chrome.windows",
    "subtype": "wp:http://localhost:8089/#xxx-xx-xx-xx-xx-x",
    "scope": "*",
    "authorizedEntity": "xxxx",
    "rel": {
        "topics": {
            }
        }
    },
    "platform": "BROWSER"
}

Upvotes: 0

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