Flutter Web: http Response Status Code?

[Kevin Roberson]

Hello,

I'm posting to an API server and trying to check the response status code to determine success or failure.  According to several examples I've found, there should be a Response.statusCode integer value that is returned.  However, it doesn't show in code complete on VS Code.  Instead, editor gives me the following:

The getter 'statusCode' isn't defined for the type 'Future<Response>'.
Try importing the library that defines 'statusCode', correcting the name to the name of an existing getter, or defining a getter or field named 'statusCode'.dart(undefined_getter)  

What am I missing?

Thanks,

Kevin

import 'package:http/http.dart' as http;

onPressed: () {

                      if (_registerFormKey.currentState.validate()) {

                        Future<http.Response> addResponse = addUser();

                        if (addResponse.statusCode == 200) {

                          Navigator.of(context).pushNamed(Success.route);

                        } else {

                          errorMsg(context);

                        }

                      }

                    },

Future<http.Response> addUser() {

    var regForm = new Map();

    regForm['firstName'] = _firstNameTextController.text;

    regForm['lastName'] = _lastNameTextController.text;

    regForm['email'] = _emailTextController.text;

    regForm['relationship'] = _dropdownValue;

    regForm['relationOther'] = _relationTextController.text;

    regForm['username'] = _usernameTextController.text;

    regForm['password'] = encr(_passwordTextController.text);

    regForm['passwordHint'] = _passwordHintTextController.text;

    regForm['passwordQ1'] = _passwordRecoveryQ1TextController.text;

    regForm['passwordA1'] = _passwordRecoveryA1TextController.text;

    regForm['passwordQ2'] = _passwordRecoveryQ2TextController.text;

    regForm['passwordA2'] = _passwordRecoveryA2TextController.text;

    regForm['passwordQ3'] = _passwordRecoveryQ3TextController.text;

    regForm['passwordA3'] = _passwordRecoveryA3TextController.text;

    return http.post(

      Constants.API_URL + '/addUser',

      headers: <String, String>{'Content-Type': 'application/json'},

      body: json.encode(regForm),

    );

  }

[Andy T Greenshaw]

You should ‘await’ the http.Post and change return type of addUser to just http.Response.

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[Kevin Roberson]

Thanks for the quick response Andy, but when I remove Future from the addUser function, I get:

Functions marked 'async' must have a return type assignable to 'Future'.
Try fixing the return type of the function, or removing the modifier 'async' from the function body.dart(illegal_async_return_type)  

[Suzuki Tomohiro]

The error message tells what to do. Which part di you need help?

Learn the difference between “ Future<Response>” and “Response”. 

To view this discussion on the web visit https://groups.google.com/d/msgid/flutter-dev/a29b1009-9228-4ecb-ac6d-abe6482380e6n%40googlegroups.com.

[Kevin Roberson]

Andy, here is the updated code, as you requested.  Thanks for your help.

import 'package:http/http.dart' as http;

onPressed: () {

    if (_registerFormKey.currentState.validate()) {

      `addResponse = addUser();

       if (addResponse.statusCode == 200) {

          Navigator.of(context).pushNamed(Success.route);

       } else {

           errorMsg(context);

       }

   }

},

http.Response addUser() async {

    http.Response res;

    var regForm = new Map();

    regForm['firstName'] = _firstNameTextController.text;

    regForm['lastName'] = _lastNameTextController.text;

    regForm['email'] = _emailTextController.text;

    regForm['relationship'] = _dropdownValue;

    regForm['relationOther'] = _relationTextController.text;

    regForm['username'] = _usernameTextController.text;

    regForm['password'] = encr(_passwordTextController.text);

    regForm['passwordHint'] = _passwordHintTextController.text;

    regForm['passwordQ1'] = _passwordRecoveryQ1TextController.text;

    regForm['passwordA1'] = _passwordRecoveryA1TextController.text;

    regForm['passwordQ2'] = _passwordRecoveryQ2TextController.text;

    regForm['passwordA2'] = _passwordRecoveryA2TextController.text;

    regForm['passwordQ3'] = _passwordRecoveryQ3TextController.text;

    regForm['passwordA3'] = _passwordRecoveryA3TextController.text;

    res = await http.post(

      Constants.API_URL + '/addUser',

      headers: <String, String>{'Content-Type': 'application/json'},

      body: json.encode(regForm),

    );

    return res;

  }

On Wednesday, January 27, 2021 at 4:01:18 PM UTC-6 andy...@gmail.com wrote: