How to convert from Windows1251 String to UTF String?

[rpungin]

This is more of a question rather than an issue, but hopefully someone can answer me.

I am loading the HTML from a Russian webpage using http package into a String variable like so:

String html = await http.Client().get(Uri.parse(url)).body;

The website encoding is Windows1251. So for example html variable can have text such as "Êàêèå". This is what I see when I print the variable.

So my question is: How do I convert that string to Cyrillic characters in Unicode encoding which should result in "Какие"?

I tried this:

import 'dart:convert';
import 'package:enough_convert/enough_convert.dart';

void main() {
  final html = "Êàêèå";
  final encoded = const Windows1251Codec().encode(html);
  final converted = const Utf8Codec().decode(encoded);
  print(converted);
}

But I get an error on this line: final encoded = const Windows1251Codec().encode(html);:

FormatException: Invalid value in input: "Ê" / (202) at index 0 of "Êàêèå"

Essentially what I would like to do is to convert "Êàêèå" to "Какие". You can do this on the website https://convertcyrillic.com. Here is the screenshot:

So how do I do this programmatically in Dart?

[rpungin]

After extensive googling I found the solution:

Turns out I have to encode the string using Latin1 encoder first, and then decode it using Windows1251 codec:

import 'package:enough_convert/enough_convert.dart';

void main() {
  final html = "Êàêèå";
  final encoded = const Latin1Codec().encode(html);
  final converted = const Windows1251Codec().decode(encoded);
  print(converted);
}

This prints out "Какие"