HttpException: Connection closed before full header was received

Question

I am trying to make post call as the code bellow shows.

  Map<String, String> header = {"Content-Type": "application/json"};
  Map<String, String> body = {
    "client_id": "xxxx",
    "client_secret": "XXXX",
    "password": "password",
    "username": "username",
  };

  Future<Post> callForFirstToken() async {
    final response = await http.post(url, headers: header, body: body);
    return response.statusCode == 200
      ? Post.fromJson(json.decode(response.body))
      : throw Exception('Failed to load ...');}

But, I have got this error:

Error connecting to the service protocol: HttpException: Connection closed before full header was received, uri = http://127.0.0.1:60556/sK_cPlYMcGQ=/ws

Answer 1

I have replaced the header to as bellow shows and works

{"HttpHeaders.contentTypeHeader": "application/json"}

Answer 2

I think I had the same issue, but I'm not sure how I solved. I think it was adding this to the header: ..headers["Content-Type"] = "application/json"