Getting Unauthorized 401 for manifest.json GCM push notifications in ASP.NET

Question

My manifest file is in the root folder, referenced in the _Layout view as following:

<link rel="manifest" href="~/manifest.json">

The file structure is as following:

{
"gcm_sender_id": "MY_Sender_Id",
"permissions": [
"gcm"
] 
}

Keep getting 401 unauthorized, in chrome dev tools under the application tab, this is what I get:

Are you positive you're using the correct value for the `gcm_sender_id`? — AL., Jul 15 '17 at 06:06
@AL. Yes, have even closed an account and created a new one, to get a new sender id just in case the previous one was corrupted. — threesixnine, Jul 15 '17 at 12:49

score 3 · Accepted Answer · answered Jul 16 '17 at 01:37

When using FCM for Web, the value for gcm_sender_id is fixed. From the docs:

{
  "//": "Some browsers will use this to enable push notifications.",
  "//": "It is the same for all projects, this is not your project's sender ID",
  "gcm_sender_id": "103953800507"
}

Don't confuse the "browser sender ID" with the project-specific sender ID value shown in your Firebase project settings. The browser sender ID for manifest.json is a fixed value, common among all FCM JavaScript clients.

Getting Unauthorized 401 for manifest.json GCM push notifications in ASP.NET

1 Answers1