fix: bad api path 404 response

apps/emqx_dashboard/src/emqx_dashboard.erl

@@ -61,6 +61,7 @@ start_listeners(Listeners) ->
             }}},
     Dispatch = [ {"/", cowboy_static, {priv_file, emqx_dashboard, "www/index.html"}}
                , {"/static/[...]", cowboy_static, {priv_dir, emqx_dashboard, "www/static"}}
+               , {?BASE_PATH ++ "/[...]", emqx_dashboard_bad_api, []}
                , {'_', cowboy_static, {priv_file, emqx_dashboard, "www/index.html"}}
                ],
     BaseMinirest = #{

apps/emqx_dashboard/src/emqx_dashboard_bad_api.erl

@@ -0,0 +1,29 @@
+%%--------------------------------------------------------------------
+%% Copyright (c) 2020-2022 EMQ Technologies Co., Ltd. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%--------------------------------------------------------------------
+
+-module(emqx_dashboard_bad_api).
+
+-include_lib("emqx/include/logger.hrl").
+
+-export([init/2]).
+
+init(Req0, State) ->
+    ?SLOG(warning, #{msg => "unexpected_api_access", request => Req0}),
+    Req = cowboy_req:reply(404,
+        #{<<"content-type">> => <<"application/json">>},
+        <<"{\"code\": \"API_NOT_EXIST\", \"message\": \"Request Path Not Found\"}">>,
+        Req0),
+    {ok, Req, State}.