Flutter send notificiation from client app with curl - firebase-cloud-messaging

Question

I'm trying to send a notification from flutter application directly, but I can not figure it out how to do it.
Everywhere they say have to send a curl request with basic network library but there is no example.
DATA='{"notification": {"body": "this is a body","title": "this is a title"}, "priority": "high", "data": {"click_action": "FLUTTER_NOTIFICATION_CLICK", "id": "1", "status": "done"}, "to": "<FCM TOKEN>"}'
curl https://fcm.googleapis.com/fcm/send -H "Content-Type:application/json" -X POST -d "$DATA" -H "Authorization: key=<FCM SERVER KEY>"
Please help me with an example in DART.

Answer 1

You could try this:
import 'dart:async';
import 'dart:convert' show Encoding, json;
import 'package:http/http.dart' as http;
class PostCall {
final postUrl = 'https://fcm.googleapis.com/fcm/send';
final data = {
"notification": {"body": "this is a body", "title": "this is a title"},
"priority": "high",
"data": {
"click_action": "FLUTTER_NOTIFICATION_CLICK",
"id": "1",
"status": "done"
},
"to": "<FCM TOKEN>"
};
Future<bool> makeCall() async {
final headers = {
'content-type': 'application/json',
'Authorization': 'key=<FCM SERVER KEY>'
};
final response = await http.post(postUrl,
body: json.encode(data),
encoding: Encoding.getByName('utf-8'),
headers: headers);
if (response.statusCode == 200) {
// on success do sth
return true;
} else {
// on failure do sth
return false;
}
}
}