Flutter web doesnt recognizes cors

[Gtomazini]

I'm not able to consume the api through Flutter Web (just mobile) because it points out that it doesn't have cors, I tried to implement custom ones but it didn't work, any ideas?

( i even tried to force https but do not work too in the Web version)

My API:

import 'dart:async';
import 'dart:io';

import 'package:backend/api/login_api.dart';
import 'package:backend/api/pendency_api.dart';
import 'package:backend/services/login_service.dart';
import 'package:backend/services/pendency_service.dart';
import 'package:mysql_client/mysql_client.dart';
import 'package:shelf/shelf.dart';
import 'package:shelf/shelf_io.dart';
import 'package:shelf_cors_headers/shelf_cors_headers.dart';
import 'infra/database/mysql_config.dart';
import 'infra/middleware_interception.dart';

void main(List<String> args) async {
  

  SecurityContext getSecurityContext() { // Bind with a secure HTTPS connection
  final chain = Platform.script.resolve('certificates/server_chain.pem').toFilePath();
  final key = Platform.script.resolve('certificates/server_key.pem').toFilePath();
  
  return SecurityContext()
  ..useCertificateChain(chain)
  ..usePrivateKey(key, password: 'dartdart');
}
  final ip = 'localhost'; //InternetAddress.anyIPv4;

  print("Connecting to mysql server...");

final mysqlConnection = await createMySQLConnection();



var pendencyService = PendencyService(mysqlConnection);
var loginService = LoginService(mysqlConnection);

var cascadeHandler = Cascade()
    .add(PendencyApi(pendencyService).handler)
    .add(LoginApi(loginService).handler)
    .handler;

  final handler = Pipeline()
  .addMiddleware(corsHeaders())
  .addMiddleware(MiddlewareInterception.contenTypeJson)
  .addMiddleware(MiddlewareInterception.cors)
  .addHandler(cascadeHandler);

 
  final port = int.parse(Platform.environment['PORT'] ?? '8080');
  final server = await serve(handler, ip, port, securityContext: getSecurityContext());
  print('Server listening on port ${server.port}');

  setupExitHandlers(server, mysqlConnection);
}