how to solve flutter CERTIFICATE_VERIFY_FAILED error while performing a POST request?

Question

I am sending a post request in Dart. It is giving a response when I test it on API testing tools such as Postman. But when I run the app. It gives me the following error:- <

Answer 1

The best approach (I think) is to allow certificate for trusted hosts, so if your API host is "api.my_app" you can allow certificates from this host only:

HttpClient client = new HttpClient();
client.badCertificateCallback = ((X509Certificate cert, String host, int port) {
 final isValidHost = host == "api.my_app";
 return isValidHost;
});

If you have more hosts you can just add a new check there.