如何使用谷歌应用脚​​本从 Firebase 发送推送通知？

Question

I want to write a little script that tells Firebase to push notification if a certain condition is met. How to send push notification from Firebase using google apps script?

Answer 1

I'd never tried this before, but it's actually remarkably simple.

There are two things you need to know for this:

1. How to send a HTTP request to Firebase Cloud Messaging to deliver a message
2. How to call an external HTTP API from with Apps Script

Once you have read those two pieces of documentation, the code is fairly straightforward:

function sendNotificationMessage() {
  var response = UrlFetchApp.fetch('https://fcm.googleapis.com/fcm/send', {
    method: 'POST',
    contentType: 'application/json',
    headers: {
      Authorization: 'key=AAAAIM...WBRT'
    },
    payload: JSON.stringify({
      notification: {
        title: 'Hello TSR!'
      },
      to: 'cVR0...KhOYB'
    })
  });
  Logger.log(response);
}

In this case:

1. the script sends a notification message . This type of message:

   • shows up automatically in the system tray when the app is not active
   • is not displayed when the app is active

   If you want full control over what the app does when the message reaches the device, send a data message

2. the script send the message to a specific device, identified by its device token in the to property. You could also send to a topic, such as /topics/user_TSR . For a broader example of this, see my blog post on Sending notifications between Android devices with Firebase Database and Cloud Messaging .

3. the key in the Authorization header will need to match the one for your Firebase project. See Firebase messaging, where to get Server Key?