How to Solve this error CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:359))

Question

I am new to flutter and developing an app but I am facing an issue regarding a post request to the asp.net core API method. This below is the flutter code that I am using to post data to the asp.net core API method.

Future registerUser(
    String userFullName, String username, String email, String password) async {
  var body = jsonEncode({
    "UserFullName": userFullName,
    "Username": username,
    "Email": email,
    "Password": password
  });
  final response = await http.post(
      Uri.parse(GetURI.baseURI() + 'Account/Register'),
      body: body,
      headers: {"content-type": "application/json"});
  print("Hello Body! " + response.statusCode.toString());
  print(response.body);
  return null;
}

On button click, I am calling the above function to post data but getting an error. The code for the button click is below:

onPressed: () async {
                  final validationSuccess = _formKey.currentState!.validate();
                  if (validationSuccess) {
                    _formKey.currentState!.save();
                    final formData = _formKey.currentState!.value;
                    final userData = await registerUser(
                        _formKey.currentState!.fields['username']!.value,
                        _formKey.currentState!.fields['email']!.value,
                        _formKey.currentState!.fields['email']!.value,
                        _formKey.currentState!.fields['password']!.value);
                    print(userData!.userFullName);
                    ScaffoldMessenger.of(context).showSnackBar(SnackBar(
                      content: Text('$formData'),
                      duration: Duration(seconds: 5),
                    ));
                  }
                }

On clicking the button it gives me the error like below:

[ERROR:flutter/lib/ui/ui_dart_state.cc(199)] Unhandled Exception: HandshakeException: Handshake error in client (OS Error:
CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:359))

This is the Class code from where I am returning my URL:

class GetURI {
  static String baseURI() {
    return 'https://10.103.78.29:44318/api/';
  }
}

My main.dart file

import 'dart:io';

import 'package:bugsmashmobileapp/Screen/LoginScreen/login_body.dart';
import 'package:bugsmashmobileapp/Screen/SignupScreen/signup_body.dart';
import 'package:bugsmashmobileapp/Screen/WelcomeScreen/getting_started_screen.dart';
import 'package:flutter/material.dart';

class MyHttpOverrides extends HttpOverrides {
  @override
  HttpClient createHttpClient(SecurityContext? context) {
    return super.createHttpClient(context)
      ..badCertificateCallback =
          (X509Certificate cert, String host, int port) => true;
  }
}

void main() {
  HttpOverrides.global = new MyHttpOverrides();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'BUGSMASH APP',
      theme: ThemeData(
          primarySwatch: Colors.blue, scaffoldBackgroundColor: Colors.white),
      home: GettingStartedScreen(),
      routes: {
        SignupScreen.routeName: (context) => SignupScreen(),
        LoginScreen.routeName: (context) => LoginScreen()
      },
    );
  }
}

I have tried many ways and searched a lot but not able to get a good way to solve this error. If anyone can help it would be appreciated.

You're trying to call an unsafe URL so you need to override flutter security for badCertificateCallBack https://stackoverflow.com/questions/54285172/how-to-solve-flutter-certificate-verify-failed-error-while-performing-a-post-req — Einzeln, Jul 08 '21 at 12:10
Yeah, I have done this work but it didn't work for me. I have edited my question @Einzeln you can see it now. — , Jul 08 '21 at 12:11

score 0 · Accepted Answer · answered Aug 09 '21 at 08:44

When I tried ngrok the problem is solved for me. First I created an account on ngrok (Click here to go to website) and then you need to install its software to generate a URL and forwarding it to your API Project. Then you can use that URL in your Flutter Project without any issue.

How to Solve this error CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:359))

1 Answers1