Ask Your Question
2

What is the process of invoking a Cloud Function in Firebase through Flutter?

asked 2023-01-10 11:00:00 +0000

lalupa gravatar image

edit retag flag offensive close merge delete

1 Answer

Sort by ยป oldest newest most voted
1

answered 2022-02-23 22:00:00 +0000

bukephalos gravatar image

The process of invoking a Cloud Function in Firebase through Flutter involves the following steps:

  1. Set up your Flutter project and integrate Firebase into your app.

  2. Create a Cloud Function in Firebase Console or deploy it using Firebase CLI.

  3. Write a function in Flutter to call the Cloud Function. You can use the FirebaseFunctions class from the firebase_functions package and initialize it using FirebaseFunctions.instance, which returns a singleton instance. Then, you can call the Cloud Function using the httpsCallable method of the FirebaseFunctions class.

  4. Pass the necessary parameters to the Cloud Function using a Map object.

  5. Handle the response of the Cloud Function in your Flutter code.

Here is an example of how you can call a Cloud Function named addNumbers in Flutter:

import 'package:firebase_functions/firebase_functions.dart';

final functions = FirebaseFunctions.instance;

Future<int> addNumbers(int a, int b) async {
  final httpsCallable = functions.httpsCallable('addNumbers');
  final result = await httpsCallable.call({
    'a': a,
    'b': b,
  });
  return result.data;
}

This function takes two integers a and b as parameters, calls the Cloud Function addNumbers with these parameters, and returns the result of the Cloud Function as an integer. You can use this function in your Flutter code like this:

int result = await addNumbers(3, 4);
print(result); // prints 7

Note that you need to handle errors that may occur while calling the Cloud Function. The call method of the FirebaseFunctions.HttpsCallable class returns a HttpsCallableResult object that has a data property containing the result of the Cloud Function. However, the call method may throw an exception if the Cloud Function fails to execute. You can handle these exceptions using a try-catch block.

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss

Add Answer


Question Tools

Stats

Asked: 2023-01-10 11:00:00 +0000

Seen: 9 times

Last updated: Feb 23 '22