1、添加一个同步请求方法

lib/util/net_util.dart

@@ -46,7 +46,7 @@ class NetUtil {
     if (_dio == null) {
       var setting = await NativeUtil.getSetting();
       String domain = setting['domain']; //'http://www.hairuyi.com/';
-      _config(domain, proxyUrl: '192.168.0.112:8888');
+//      _config(domain, proxyUrl: '192.168.0.66:8866');
     }
     return _dio;
   }
@@ -86,49 +86,39 @@ class NetUtil {
 
   /// 同步请求
   static Future<dynamic> post(String path,
-      {Map<String, dynamic> params}) async {
+      {Map<String, dynamic> params, NetMethod method = NetMethod.POST}) async {
     if (params == null) {
       params = {};
     }
-
+    // 根据请求参数，获取缓存的Key
+    String cacheKey = _getRequestParamsCachedKey(params, path);
+    // 参数签名 TODO 加密？
     Map<String, dynamic> sign = await signParams(params);
+
     Response response;
     try {
       Dio dio = await NetUtil.getInstance().dio;
-      response = await dio.post(path, data: sign);
+      response = await dio.request(path, data: sign, options: Options(method: enumToString(method)));
     } on DioError catch (e) {
       _formatError(e);
-//      Logger.error(e);
-    }
-    if (response == null) {
-      return null;
     }
 
-    if (response.statusCode != 200) {
-      // 请求错误
-      const bool inProduction = const bool.fromEnvironment("dart.vm.product");
-      if (!inProduction) {
-        Fluttertoast.showToast(msg: response.statusMessage);
+    try {
+      var result = response.data is Map ? response.data : jsonDecode(response.data);
+      // TODO 解密？
+      if (isSuccess(result)) {
+          // 缓存成功的数据
+          _setCallBackCacheData(cacheKey, response.data is Map ? jsonEncode(response.data) : response.data);
+          return  result;
+          // 缓存返回的数据
       }
-      // log.e(response.statusMessage);
-      return null;
-    }
-
-    var result = response.data;
-
-    if (result[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
-            GlobalConfig.RESPONSE_SUCCESS_CODE ||
-        result[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
-            '${GlobalConfig.RESPONSE_SUCCESS_CODE}') {
-      Logger.error(result[GlobalConfig.HTTP_RESPONSE_KEY_MSG]);
 
-      Fluttertoast.showToast(
-        msg: result[GlobalConfig.HTTP_RESPONSE_KEY_MSG],
-        toastLength: Toast.LENGTH_SHORT,
-        gravity: ToastGravity.BOTTOM,
-      );
+      Logger.error('error: ' + result[GlobalConfig.HTTP_RESPONSE_KEY_MSG]);
+      Fluttertoast.showToast(msg: result[GlobalConfig.HTTP_RESPONSE_KEY_MSG], toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.BOTTOM,);
+      return result;
+    } catch (e) {
+      return null;
     }
-    return result;
   }
 
   /// 异步请求
@@ -166,10 +156,7 @@ class NetUtil {
       var result =
           response.data is Map ? response.data : jsonDecode(response.data);
       // TODO 解密？
-      if (result[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
-              GlobalConfig.RESPONSE_SUCCESS_CODE ||
-          result[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
-              '${GlobalConfig.RESPONSE_SUCCESS_CODE}') {
+      if (isSuccess(result)) {
         if (onSuccess != null) {
           onSuccess(result[GlobalConfig.HTTP_RESPONSE_KEY_DATA]);
           // 缓存返回的数据
@@ -186,7 +173,7 @@ class NetUtil {
         gravity: ToastGravity.BOTTOM,
       );
       if (onError != null) {
-        onError(result[GlobalConfig.HTTP_RESPONSE_KEY_MSG] ?? '未知错误');
+        onError( !EmptyUtil.isEmpty(result) ?  !EmptyUtil.isEmpty(result[GlobalConfig.HTTP_RESPONSE_KEY_MSG]) ? result[GlobalConfig.HTTP_RESPONSE_KEY_MSG] : '未知错误' : '未知错误');
       }
     } catch (e) {
       if (onError != null) {
@@ -299,6 +286,36 @@ class NetUtil {
     SharedPreferencesUtil.setNetCacheResult(cacheKey, value);
   }
 
+  /// 根据请求参数，获取缓存的数据
+  static Future<dynamic> getRequestCachedData(String url, {Map<String, dynamic> params}) async{
+      Map<String, dynamic> cacheMap =  await SharedPreferencesUtil.getNetCacheResult(_getRequestParamsCachedKey(params, url));
+      if (!EmptyUtil.isEmpty(cacheMap) &&
+          cacheMap.containsKey(GlobalConfig.HTTP_RESPONSE_KEY_CODE) &&
+          (cacheMap[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
+              GlobalConfig.RESPONSE_SUCCESS_CODE ||
+              cacheMap[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
+                  '${GlobalConfig.RESPONSE_SUCCESS_CODE}') && !EmptyUtil.isEmpty(cacheMap[GlobalConfig.HTTP_RESPONSE_KEY_DATA])) {
+          return cacheMap[GlobalConfig.HTTP_RESPONSE_KEY_DATA];
+      }
+      return null;
+  }
+
+  /// 判断后台返回是否成功
+  static bool isSuccess(Map<String, dynamic> data){
+    try {
+      if (!EmptyUtil.isEmpty(data) &&
+          (data[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
+              GlobalConfig.RESPONSE_SUCCESS_CODE ||
+              data[GlobalConfig.HTTP_RESPONSE_KEY_CODE] ==
+                  '${GlobalConfig.RESPONSE_SUCCESS_CODE}')) {
+        return true;
+      }
+    }catch(e){
+      return false;
+    }
+    return false;
+  }
+
   /// 根据请求参数，获取缓存的Key
   static String _getRequestParamsCachedKey(
       Map<String, dynamic> map, String path) {