Sample HttpClient Flutter

Flutter HttpClient

import 'dart:convert';
import 'dart:io';

class ApiProvider {
  final Uri uri;
  final HttpClient _client = HttpClient();

  ApiProvider(this.uri);

  Future<String> makeGetRequest() async {
    final request = await _client.getUrl(uri)
      ..headers.contentType = ContentType.json;
    final response = await request.close();

    if (response.statusCode != 200) {
      throw ApiException(
          error: 'Status code ${response.statusCode}',
          description: 'Received ${response.headers}');
    }

    var raw = '';
    await response
        .transform(Utf8Decoder(allowMalformed: true))
        .forEach((element) => raw += element);
    return raw;
  }
}