Api 执行POST请求时，颤振证书\u验证\u失败错误？

我在Dart中发送一个post请求，当我在API测试工具（如Postman）上测试它时，它会给出一个响应。但当我运行应用程序时。它给了我以下错误：-

这是我的函数代码-

var request =
    http.MultipartRequest('POST', Uri.parse('https://myurl/files/'));
request.files.add(await http.MultipartFile.fromPath('file', pathfile));

http.StreamedResponse response = await request.send();
if (response.statusCode == 200) {
  print(await response.stream.bytesToString());
} else {
  print(response.reasonPhrase);
}

错误

---

您可以尝试的另一件事是尝试在后端使用降级版本的SSL，如SSLv1.2。这对我来说很有用，谢谢

E/flutter ( 6264): HandshakeException: Handshake error in client (OS Error: E/flutter ( 6264):  CERTIFICATE_VERIFY_FAILED: unable to get local issuer certificate(handshake.cc:363))

 **main.dart**

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

void main() async {
WidgetsFlutterBinding.ensureInitialized();
HttpOverrides.global = new MyHttpOverrides();
runApp(Myapp());}