Error with non signed certificates

[julioffigueiredo]

• Using with platform: WEB
• dio_http: ^5.0.4
• Flutter: 2.5

Same request with non signed certificate that in windows, ios, android returns ok, mac not tested, with web project get this error:

Error: Expected a value of type 'DefaultHttpClientAdapter', but got one of type 'BrowserHttpClientAdapter'

This is the code used to avoid certificate error, as I said, work for Androis, iOS and Windows (not tested for Mac):

  (_dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =
      (HttpClient client) {
    client.badCertificateCallback = (X509Certificate cert, String host, int port) => true;
    return client;
  };

[jgoyvaerts]

This is not a bug. Depending on the platform, dio uses a different adapter (on Web it uses a BrowserHttpClientAdapter, on all other platforms it uses a DefaultHttpClientAdapter).

You are casting your adapter to DefaultHttpClientAdapter but it's actually a BrowserHttpClientAdapter, so your code gives an error. Before casting you should check if it is a DefaultHttpClientAdapter.

if(_dio.httpClientAdapter is DefaultHttpClientAdapter){
//do your code
} else {
//do something else
}

Keep in mind, I don't think it's pssible to ignore certificate errors on web programmatically, this is a browser limitation, not a dio/dart limitation. It should work on web if your website is on the same domain as the api you are calling.