GCM Error=MissingRegistration sending messages via JSON

Question

I'm testing push GCM via Fiddler

Headers:

User-Agent: Fiddler
Authorization: key=AIzaSyAkXfcuLLCZ-5n18wwO6XeJ13g-z9ja
Host: android.googleapis.com
Content-Length: 286

Body:

{"registration_ids":["APA91bHyn8YHcH_vSuOo7_A0PMgF5SU1K0FebOFGKXYTqpN5x4eD0tVBvzQLn749TVcczN5gSjB1wqf5AzYfxFI_qskA1Nzipf-9MfdEom1PI1vkFqKIg9B8vZvPLOLozE7jaRzELuyDzpFRbO3Xh5lT-KDA"],"collapse_key":"8b990f5a-78fc-4bad-b242-ffc740a750fb","data":{"message":"message to device"}}

I've got a error

Error=MissingRegistration

Where is my problem? All ids are correct.

you should remove private data such as keys and secret id's – gutte Oct 20 '16 at 20:47 — gutte, Oct 20 '16 at 20:47

score 115 · Accepted Answer · answered Mar 18 '14 at 17:13

115

You probably forgot to specify the content type in the header to be JSON.

Content-Type: application/json

If Content-Type is omitted, the format is assumed to be plain text.

And for plain text the registration ID is passed in a parameter called registration_id instead of registration_ids, which explains your MissingRegistration error.

answered Mar 18 '14 at 17:13

Eran

387,369
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768

In 2019 it still has sense! – CoolMind Oct 14 '19 at 15:53
1

@SatyajitBehera perhaps you have a different issue. I haven't worked with GCM for quite a few years, but this answer seems to still be helpful for some people (based on recent votes). – Eran Jul 25 '21 at 06:28

score 5 · Answer 2 · answered Oct 16 '15 at 14:18

5

For the new cloud Message, when you want to send a dwonstream message from the server, you need to use "to" to declaim the target registration id.

like below :

https://gcm-http.googleapis.com/gcm/send
Content-Type:application/json
Authorization:key=AIzaSyZ-1u...0GBYzPu7Udno5aA

{ "data": {
    "score": "5x1",
    "time": "15:10"
  },
  "to" : "APA91bHun4MxP5egoKMwt2KZFBaFUH-1RYqx..."
}

answered Oct 16 '15 at 14:18

Zephyr

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5

So you must have the "to:..." if you want to send a push ? what if i want to send the push to all the users from a client ? (admin client for example..) – XcodeNOOB Aug 07 '16 at 10:43

score 2 · Answer 3 · answered Jun 18 '16 at 21:40

For Firebase, You can get info from https://firebase.google.com/docs/cloud-messaging/http-server-ref#error-codes

Check that the request contains a registration token (in the registration_id in a plain text message, or in the to or registration_ids field in JSON).

score 0 · Answer 4 · answered Jun 20 '19 at 10:03

0

Swift 5

In my case receiver token was missing and after put the fcm receiver token its work fine for me

answered Jun 20 '19 at 10:03

Shakeel Ahmed

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GCM Error=MissingRegistration sending messages via JSON

4 Answers4

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