A library to subscribe to a GCM/FCM (Firebase Cloud Messaging) sender using protobuf.
The library was inspired by push-receiver and by this blog post.
- This library receives FCM notifications the same way an Android device does. This library is an FCM client.
- Other libraries (such as go-fcm) sends notifications via fcm, and does not receive notifications. Those libraries are an FCM server-side.
import "github.com/morhaviv/go-fcm-receiver"
- Firebase sender id to receive notification
package main
import (
go_fcm_receiver "github.com/morhaviv/go-fcm-receiver"
)
func main() {
newDevice := go_fcm_receiver.FCMClient{
SenderId: 845754665638,
OnDataMessage: func(message []byte) {
fmt.Println("Received a message:", string(message))
},
}
privateKey, authSecret, err := newDevice.CreateNewKeys()
if err != nil {
panic(err)
}
fcmToken, gcmToken, androidId, securityToken, err := newDevice.Register()
if err != nil {
panic(err)
}
SaveDeviceDetails(fcmToken, gcmToken, androidId, securityToken, privateKey, authSecret)
err = newDevice.StartListening()
if err != nil {
panic(err)
}
}package main
import (
go_fcm_receiver "github.com/morhaviv/go-fcm-receiver"
)
func main() {
oldDevice := go_fcm_receiver.FCMClient{
SenderId: 845754665638, // Firebase Project ID
GcmToken: "<GCM_TOKEN>",
FcmToken: "<FCM_TOKEN>",
AndroidId: 5240887932061714513, // The androidId returned when the device was created
SecurityToken: 69534515778185919, // The securityToken returned when the device was created
OnDataMessage: func(message []byte) {
fmt.Println("Received a message:", string(message))
},
}
err := oldDevice.LoadKeys("<PRIVATE_KEY_BASE64>", "<AUTH_SECRET_BASE64>")
if err != nil {
panic(err)
}
err = oldDevice.StartListening()
if err != nil {
panic(err)
}
}