Flutter Dio网络请求:DioError [DioErrorType.RESPONSE]: Http status error [400]或者[500]

淡淡的烟草味﹌ 2021-11-10 08:50 288阅读 0赞

# DioError \[DioErrorType.RESPONSE\]: Http status error \[400\] #

### 1)检查请求参数是否正确 ： ###

比如，如果参数map中value是一个数组，如下代码中的innerParticipateGroups和innerParticipators的value值不能转成toString，否则就会报400

Map<String,dynamic> params = {
          "chamberId":resultId,
          "description":remark,
          "finishAt":1564979400000,
          "innerParticipateGroups":[],
          "innerParticipators":[],
          "name":meetingName,
          "reportId":"",
          "scheduleId":"",
          "startAt":1564975800000
        };

###  2）如果以上正确，检查get和post调用时参数的就收方式 ###

看下Dio(v2.1.0)的GET请求源码：

Future<Response<T>> get<T>(
        String path, {
        Map<String, dynamic> queryParameters,
        Options options,
        CancelToken cancelToken,
        ProgressCallback onReceiveProgress,
      }) {
        return request<T>(
          path,
          queryParameters: queryParameters,
          options: _checkOptions("GET", options),
          onReceiveProgress: onReceiveProgress,
          cancelToken: cancelToken,
        );
      }

GET请求的源码中参数接受要求传入的是queryParameters, 所以调用时用queryParameters

response = await dio.get(url, queryParameters: params);

POST源码：

/// Handy method to make http POST request, which is a alias of  [Dio.request].
      Future<Response<T>> post<T>(
        String path, {
        data,
        Map<String, dynamic> queryParameters,
        Options options,
        CancelToken cancelToken,
        ProgressCallback onSendProgress,
        ProgressCallback onReceiveProgress,
      }) {
        return request<T>(
          path,
          data: data,
          options: _checkOptions("POST", options),
          queryParameters: queryParameters,
          cancelToken: cancelToken,
          onSendProgress: onSendProgress,
          onReceiveProgress: onReceiveProgress,
        );
      }

POST源码中参数接受有data和queryParameters，调用时key用data，用queryParameters会报400，queryParameters这个key不知道具体怎么用，官方也没具体说明，官方文档中post请求都是用data传参，有懂的大神麻烦给补充一下。

response = await dio.post(url, data : params);

--------------------

#  DioError \[DioErrorType.RESPONSE\]: Http status error \[500\] #

### 检查header是否设置了或者设置错了 ###

HttpGo() {
        dio = Dio(BaseOptions(
          baseUrl: 'https://www.***.com/',
          headers: getHeaders(),
          connectTimeout: 5000,
          receiveTimeout: 3000,
        ));
      }
      getHeaders () {
        return {
          'Accept':'application/json, text/plain, */*',
          'Content-Type':'application/json',
          'Authorization':"**",
          'User-Aagent':"4.1.0;android;6.0.1;default;A001",
          "HZUID":"2",
        };
      }

#  DioError \[DioErrorType.RESPONSE\]: Http status error \[415\] #

把请求参数数据格式FormData换成Map<String,dynamic>试试

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