修改dio的json解析方式

lib/api/base_dio.dart

@@ -17,6 +17,7 @@ abstract class BaseDio {
         connectTimeout: const Duration(seconds: 10),
         receiveTimeout: const Duration(seconds: 10),
         contentType: Headers.jsonContentType,
+        responseType: ResponseType.plain
         // Transform the response data to a String encoded with UTF8.
         // The default value is [ResponseType.JSON].
         ),
@@ -27,13 +28,14 @@ abstract class BaseDio {
     dio.options.baseUrl = setBaseUrl();
     dio.options.headers = setHeaders();
     // 配置JSON转换器
-    dio.transformer = MyTransformer();
     dio.interceptors.add(getHeadersInterceptor());
     dio.interceptors.add(getLogInterceptor());
     //配置代理
     setProxyUri(dio, isProdEnv());
   }
 
+  final jsonTransformer = MyTransformer();
+
   String setBaseUrl();
 
   // 设置请求头拦截器
@@ -57,11 +59,9 @@ abstract class BaseDio {
 
   void onLoginExpire() => _onLoginExpire();
 
-  Future<void> onNetSuccess(
-          Response response,
-          NetSuccessCallback successCallback,
-          NetErrorCallback? errorCallback) async =>
-      await _onNetSuccess(response, successCallback, errorCallback);
+  void onNetSuccess(Response response, NetSuccessCallback successCallback,
+          NetErrorCallback? errorCallback) =>
+      _onNetSuccess(response, successCallback, errorCallback);
 
   // 登录过期的处理
   void _onLoginExpire() {
@@ -87,7 +87,7 @@ abstract class BaseDio {
   }
 
   // 构建网络请求
-  Future<void> request({
+  void request({
     required String requestUrl,
     required Method method,
     Options? options,
@@ -103,7 +103,7 @@ abstract class BaseDio {
         data: data,
         options: _checkOptions(method.value, options),
       );
-      await onNetSuccess(response, successCallback, errorCallback);
+      onNetSuccess(response, successCallback, errorCallback);
     } on DioException catch (e) {
       if (e.response != null) {
         logger.e(
@@ -131,12 +131,23 @@ abstract class BaseDio {
         data: data,
         options: _checkOptions(method.value, options),
       );
-      var responseCode = response.data?['code']?.toString();
+      try {
+        final String data = response.data.toString();
+        final bool isCompute = data.length > 10 * 1024;
+        loggerNoStack.i('isCompute:$isCompute');
+        final Map<String, dynamic> map = isCompute
+            ? await jsonTransformer.parseJson(data)
+            : jsonTransformer.parseAndDecode(data);
+        var responseCode = map['code']?.toString();
         if (responseCode == "100" || responseCode == "-100") {
-        logger.e("登录过期：${response.data?['msg']}");
+          logger.e("登录过期：${map['msg']}");
           onLoginExpire();
         }
         return response.data;
+      } catch (e) {
+        logger.e("数据解析错误：${e.toString()}");
+        return {"code": 400, "message": "数据解析错误"};
+      }
     } on DioException catch (e) {
       if (e.response != null) {
         logger.e(
@@ -150,22 +161,31 @@ abstract class BaseDio {
   }
 
   // 处理网络请求成功逻辑
-  Future<void> _onNetSuccess(
-      Response response,
-      NetSuccessCallback successCallback,
+  void _onNetSuccess(Response response, NetSuccessCallback successCallback,
       NetErrorCallback? errorCallback) async {
-    var responseCode = response.data?['code']?.toString();
+    try {
+      final String data = response.data.toString();
+      final bool isCompute = data.length > 10 * 1024;
+      loggerNoStack.i('isCompute:$isCompute');
+      final Map<String, dynamic> map = isCompute
+          ? await jsonTransformer.parseJson(data)
+          : jsonTransformer.parseAndDecode(data);
+      var responseCode = map['code']?.toString();
       if (responseCode == "100" || responseCode == "-100") {
-      logger.e("登录过期：${response.data?['msg']}");
+        logger.e("登录过期：${map['msg']}");
         onLoginExpire();
         return;
       }
 
-    if (response.data?['code'] == 0) {
-      await successCallback.call(response.data?['data']);
+      if (map['code'] == 0) {
+        await successCallback.call(map['data']);
       } else {
-      logger.e("请求错误：${response.data?['code']} ${response.data?['msg']}");
-      await errorCallback?.call(response.data?['code'], response.data?['msg']);
+        logger.e("请求错误：${map['code']} ${map['msg']}");
+        await errorCallback?.call(map['code'], map['msg']);
+      }
+    } catch (e) {
+      logger.e("数据解析错误：${e.toString()}");
+      await errorCallback?.call(400, "数据解析错误");
     }
   }
 }

lib/api/transformer.dart

 import 'dart:convert';
 
-import 'package:dio/dio.dart';
 import 'package:flutter/foundation.dart';
 
-/// If the request data is a `List` type, the [BackgroundTransformer] will send data
-/// by calling its `toString()` method. However, normally the List object is
-/// not expected for request data( mostly need Map ). So we provide a custom
-/// [Transformer] that will throw error when request data is a `List` type.
+class MyTransformer {
 
-class MyTransformer extends BackgroundTransformer {
-  @override
-  JsonDecodeCallback get jsonDecodeCallback => parseJson;
 
-  Map<String, dynamic> _parseAndDecode(String response) {
+  Map<String, dynamic>  parseAndDecode(String response) {
     return jsonDecode(response) as Map<String, dynamic>;
   }
 
   Future<Map<String, dynamic>> parseJson(String text) {
-    return compute(_parseAndDecode, text);
+    return compute(parseAndDecode, text);
   }
 }