I am sending notification to mobile device for which I have fcm tokens. On sending, I get a response that can for each fcm token have an error. I want to remove the invalid tokens that for sure will no longer work, but keep tokens that may have failed this time and could still work in the future.
I am using the node-gcm
package.
What are the possible values for the error
field in the response of each token.
What checks on this value should I be making to only delete the permanently invalid tokens ?
sender.send(gcmMessage, { registrationTokens: fcmTokens }, (error, response) => {
if (error) {
console.log(error);
} else {
const failedTokens = fcmTokens.filter((_, index) => response.results[index].error != null);
if (failedTokens.length) {
// If there are failed tokens, check these to know whether we should delete them.
this.clearUserFcmTokens(userID, failedTokens);
}
}
});
CodePudding user response:
I got an answer from the repo itself.
They recommend checking if the error matches 'NotRegistered'
.
The values of the error field match the HTTP Code column from this link:
https://firebase.google.com/docs/cloud-messaging/http-server-ref#error-codes
examples: InvalidRegistration
, NotRegistered
, MessageTooBig
, Unavailable
etc.
Issue and response on the repo https://github.com/ToothlessGear/node-gcm/issues/360
CodePudding user response:
The two most common error codes that indicate that the token should be removed are messaging/invalid-registration-token
and messaging/registration-token-not-registered
.
I recommend basing your logic on this code in the functions-samples repo.