[Feature Request] Change auto generate header from http

[MirzaHimamiHanif]

Is your feature request related to a problem? Please describe.
http forced to add header with ; charset=utf-8 when doing request and I want my header without it.

Describe the solution you'd like
Need to change the order of http.Request(). First add the body then add the header.

Describe alternatives you've considered
No

Additional context

1. This is chopper-7.0.6 that add header first then the body
   
2. New guide from http https://github.com/dart-lang/http/pull/1014/files

Before

After

[techouse]

Hey 👋

I see. You want to remove the charset when the body is in bytes (List<int>), but in cases where the payload is text, it should contain charset=utf-8, correct?

In that case, would this do

http.Request toHttpRequest() {
  final http.Request request = http.Request(method, url)
    ..followRedirects = followRedirects;

  if (body == null) {
    request.headers.addAll(headers);
  } else {
    if (body is String) {
      request
        ..headers.addAll(headers)
        ..body = body;
    } else if (body is List<int>) {
      request
        ..bodyBytes = body
        ..headers.addAll(headers);
    } else if (body is Map<String, String>) {
      request
        ..headers.addAll(headers)
        ..bodyFields = body;
    } else {
      throw ArgumentError.value('$body', 'body');
    }
  }

  return request;
}

[techouse]

@MirzaHimamiHanif check if #508 fixes your problem

[mirzahimami]

Yes, thanks

[techouse]

Cool, I'll add some unit tests to the PR and then merge it :)