支持参数的校验

apps/iot/src/http_handlers/container_handler.erl

@@ -180,3 +180,103 @@ handle_request(_, Path, _, _) ->
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% helper methods
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+validate_config(Config) when is_map(Config) ->
+    %% 必选参数
+    Required = [
+        {image, binary},
+        {container_name, binary},
+        {command, list},
+        {restart, binary},
+        {privileged, boolean}
+    ],
+
+    %% 可选参数（附带默认值）
+    Optional = [
+        {envs, list},
+        {ports, list},
+        {expose, list},
+        {volumes, list},
+        {networks, list},
+        {labels, map},
+        {user, binary},
+        {working_dir, binary},
+        {hostname, binary},
+        {cap_add, list},
+        {cap_drop, list},
+        {devices, list},
+        {mem_limit, binary},
+        {mem_reservation, binary},
+        {cpu_shares, integer},
+        {cpus, number},
+        {ulimits, map},
+        {sysctls, map},
+        {tmpfs, list},
+        {extra_hosts, list},
+        {healthcheck, map}
+    ],
+
+    Errors1 = check_required(Config, Required),
+    Errors2 = check_optional(Config, Optional),
+
+    Errors = Errors1 ++ Errors2,
+    case Errors of
+        [] ->
+            ok;
+        _  ->
+            {error, lists:map(fun erlang:iolist_to_binary/1, Errors)}
+    end;
+
+validate_config(_) ->
+    {error, [<<"Config 必须为 map() 类型">>]}.
+
+%%------------------------------------------------------------------------------
+%% 校验必选项
+%%------------------------------------------------------------------------------
+check_required(Config, Fields) ->
+    lists:foldl(
+        fun({Key, Type}, ErrAcc) ->
+            case maps:get(Key, Config, undefined) of
+                undefined ->
+                    [io_lib:format("缺少必选参数: ~p", [Key]) | ErrAcc];
+                Value ->
+                    case check_type(Value, Type) of
+                        true ->
+                            ErrAcc;
+                        false ->
+                            [io_lib:format("参数 ~p 类型错误，应为 ~p", [Key, Type]) | ErrAcc]
+                    end
+            end
+        end,
+        [], Fields).
+
+%%------------------------------------------------------------------------------
+%% 校验可选项（支持默认值填充）
+%%------------------------------------------------------------------------------
+check_optional(Config, Fields) ->
+    lists:foldl(
+        fun({Key, Type}, ErrAcc) ->
+            case maps:get(Key, Config, undefined) of
+                undefined ->
+                    ErrAcc;
+                Value ->
+                    case check_type(Value, Type) of
+                        true ->
+                            ErrAcc;
+                        false ->
+                            [io_lib:format("可选参数 ~p 类型错误，应为 ~p", [Key, Type]) | ErrAcc]
+                    end
+            end
+        end,
+        [], Fields).
+
+%%------------------------------------------------------------------------------
+%% 类型检查辅助函数（binary版）
+%%------------------------------------------------------------------------------
+check_type(Value, binary)  -> is_binary(Value);
+check_type(Value, integer) -> is_integer(Value);
+check_type(Value, number)  -> is_number(Value);
+check_type(Value, list)    -> is_list(Value);
+check_type(Value, map)     -> is_map(Value);
+check_type(Value, boolean) -> is_boolean(Value);
+check_type(_, _)           -> false.