how to add header and make post

[jamiewest]

how to add header and make post

[Mol0ko]

Http headers can be specified using custom http client:

import 'package:http/http.dart' as http;
import 'package:flutter/foundation.dart';
import 'package:signalr_core/signalr_core.dart';

class _HttpClient extends http.BaseClient {
  final _httpClient = http.Client();
  final Map<String, String> defaultHeaders;

  _HttpClient({@required this.defaultHeaders});

  @override
  Future<http.StreamedResponse> send(http.BaseRequest request) {
    request.headers.addAll(defaultHeaders);
    return _httpClient.send(request);
  }
}

void connect() {
  final httpClient = _HttpClient(defaultHeaders: {
    'Header 1': 'Value 1',
    'Header 2': 'Value 2',
  });
  final connection = HubConnectionBuilder()
      .withUrl('fullUrl', HttpConnectionOptions(client: httpClient))
      .build();
  connection.start();
}

[DirtyNative]

This took me about 2h until I saw this post. I think this case should be put into documentation

[pavane90]

E/flutter (11646): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: HandshakeException: Handshake error in client (OS Error: 
E/flutter (11646): 	CERTIFICATE_VERIFY_FAILED: self signed certificate(handshake.cc:354))

An error occurs.
I have referred to this article but it has not been resolved. Am I doing something wrong?