What is a method of using Firebase Cloud Functions in Flutter.

Question

I have been searching all over on how to implement firebase functions with a flutter application. It does not seem like there is an SDK available (yet). I've also tried adding the gradle dependency implementation 'com.google.firebase:firebase-functions:15.0.0' to my app/build.gradle but this causes build errors.

Has anyone done an implementation that works? I am unable to find any documentation on how to handle credentials and the transport of data in order to build my own firebase functions call.

I have created a rough outline of how I am thinking this is intended to work, but may be way off base.

Future<dynamic> updateProfile(String uid, AccountMasterViewModel avm) async {

    Uri uri = Uri.parse(finalizeProfileFunctionURL);
    var httpClient = new HttpClient();
    String _result = '';

    try {
      return await httpClient
        .postUrl(uri)
        .then((HttpClientRequest request) {
          return request.close();
          // authentication??
          // Fields and data??
        })
        .then((HttpClientResponse response) async {
            print(response.transform(new Utf8Codec().decoder).join());
            if (response.statusCode == HttpStatus.OK) {
              String json = await response.transform(new Utf8Codec().decoder).join();
              _result = jsonDecode(json);
              // Do some work
              return json;
            } 
            else {
              return ':\nHttp status ${response.statusCode}';
            }
          });
        }
        catch (exception) {
          return 'Failed ' + exception.toString();
        }
      }

I'd like to be able to send an object, like

{
    accountID: src.accountID, 
    accountName: src.name,
    accountImg: src.image
}

and then handle the response. But as I said, I can't find any working examples or tutorials on how to do this. It's fairly simple to do this client size and talk directly to the database, however, there are validations and data components that need to be hidden from the client, so cloud functions is the way I would like to do this.

Answer 1

Yes, there is a cloud_function package available here: https://pub.dartlang.org/packages/cloud_function.

so as to make a call to the function you can just call

CloudFunctions.instance.call(
                    functionName: 'yourCloudFunction',
                    parameters: <String, dynamic>{
                      'param1': 'this is just a test',
                      'param2': 'hi there',
                    },
                  );

Answer 2

An updated answer to calling Firebase's Cloud Functions in Flutter would be

var callable =  CloudFunctions.instance.getHttpsCallable(functionName: 'functionName'); // replace 'functionName' with the name of your function
dynamic response = callable.call(<String, dynamic>{
    'param1': param1 //replace param1 with the name of the parameter in the Cloud Function and the value you want to insert
  }).catchError((onError) {
        //Handle your error here if the function failed

  });