发布序列化的Json正文-[VERBOSE-2：ui_dart_state.cc177]未处理的异常：错误-

问题描述

最近两天，我一直在使用带有JSON行主体的Flutter post方法而陷入困境，这里显示了我尝试过的代码。

代码1：

void send() async {

    usermodel = usermodel(userName: "usernme",password: "password");

       var response = await http.post(
           "https://stagingapi......",headers: {"Content-Type": "application/json"},body: json.encode(usermodel.toJson()));


       print(response.body);
       print(response.statusCode);

}

我已经创建了序列化的人体模型，

import 'package:json_annotation/json_annotation.dart';

part 'usermodel.g.dart';

@JsonSerializable()
class usermodel {
  String userName;
  String password;
  // String xyz;
  usermodel({this.userName,this.password});
  factory usermodel.fromJson(Map<String,dynamic> json) => _$usermodelFromJson(json);
  Map<String,dynamic> toJson() => _$usermodelToJson(this);
}

代码2：-

Future<User> createuser(String username,String password) async{
  final String apiUrl = "https://stagingapi.....";
  Map<String,String> headers = {'Content-Type':'application/json'};
  final body = jsonEncode({ "userName": username,"password": password});
  try {
    var response = await http.post(apiUrl,headers: headers,body: body);
    print(response.statusCode);
    if(response.statusCode == 201){
      final String responseString = response.body;

      return userFromJson(responseString);
    }else{
      return null;
    }
  } catch (error) {
    print('error- $error');
   
    }
  }
}

在两种情况下，或者如果我尝试使用任何邮政编码方法，都会引发以下错误，

[VERBOSE-2:ui_dart_state.cc(177)] Unhandled Exception: 
#0      IOClient.send (package:http/src/io_client.dart:65:7)
<asynchronous suspension>
#1      BaseClient._sendUnstreamed (package:http/src/base_client.dart:176:38)
#2      BaseClient.post (package:http/src/base_client.dart:58:7)
#3      post.<anonymous closure> (package:http/http.dart:70:16)
#4      _withClient (package:http/http.dart:166:20)
#5      post (package:http/http.dart:69:5)
#6      _SelectdobState.send (package:kash_app/Selectdob.dart:99:29)
#7      _SelectdobState.initState (package:kash_app/Selectdob.dart:92:6)
#8      StatefulElement._firstBuild (package:Flutter/src/widgets/framework.dart:4812:57)
#9      ComponentElement.mount (package:Flutter/src/widgets/framework.dart:4649:5)
#10     Element.inflateWidget (package:Flutter/src/widgets/framework.dart:3615:14)
#11     Element.updateChild (package:Flutter/src/widgets/framework.dart:3380:18)
#12     SingleChildRenderObjectElement.mount (package:Flutter/src/widgets/framework.dart:616<…>

解决方法

上面的代码在其他url中起作用...我已经解决了这个问题，这是我们后端团队通过添加一些configuration in IIS OR secure certificate related

对域url进行的更改