fix(gateway): improve gateway schema modules

1. enhances the gateway name as an enum
2. make the schema more flexible and extensible without some hardcode

apps/emqx_gateway/src/emqx_gateway_api.erl

@@ -93,10 +93,9 @@ gateways(get, Request) ->
 
 gateway(get, #{bindings := #{name := Name}}) ->
     try
-        GwName = gw_name(Name),
-        case emqx_gateway:lookup(GwName) of
+        case emqx_gateway:lookup(Name) of
             undefined ->
-                {200, #{name => GwName, status => unloaded}};
+                {200, #{name => Name, status => unloaded}};
             Gateway ->
                 GwConf = emqx_gateway_conf:gateway(Name),
                 GwInfo0 = emqx_gateway_utils:unix_ts_to_rfc3339(
@@ -125,15 +124,14 @@ gateway(put, #{
 }) ->
     GwConf = maps:without([<<"name">>], GwConf0),
     try
-        GwName = gw_name(Name),
         LoadOrUpdateF =
-            case emqx_gateway:lookup(GwName) of
+            case emqx_gateway:lookup(Name) of
                 undefined ->
                     fun emqx_gateway_conf:load_gateway/2;
                 _ ->
                     fun emqx_gateway_conf:update_gateway/2
             end,
-        case LoadOrUpdateF(GwName, GwConf) of
+        case LoadOrUpdateF(Name, GwConf) of
             {ok, _} ->
                 {204};
             {error, Reason} ->
@@ -148,12 +146,11 @@ gateway(put, #{
 
 gateway_enable(put, #{bindings := #{name := Name, enable := Enable}}) ->
     try
-        GwName = gw_name(Name),
-        case emqx_gateway:lookup(GwName) of
+        case emqx_gateway:lookup(Name) of
             undefined ->
                 return_http_error(404, <<"NOT FOUND">>);
             _Gateway ->
-                {ok, _} = emqx_gateway_conf:update_gateway(GwName, #{<<"enable">> => Enable}),
+                {ok, _} = emqx_gateway_conf:update_gateway(Name, #{<<"enable">> => Enable}),
                 {204}
         end
     catch
@@ -161,15 +158,6 @@ gateway_enable(put, #{bindings := #{name := Name, enable := Enable}}) ->
             return_http_error(404, <<"NOT FOUND">>)
     end.
 
--spec gw_name(binary()) -> stomp | coap | lwm2m | mqttsn | exproto | gbt32960 | no_return().
-gw_name(<<"stomp">>) -> stomp;
-gw_name(<<"coap">>) -> coap;
-gw_name(<<"lwm2m">>) -> lwm2m;
-gw_name(<<"mqttsn">>) -> mqttsn;
-gw_name(<<"exproto">>) -> exproto;
-gw_name(<<"gbt32960">>) -> gbt32960;
-gw_name(_Else) -> throw(not_found).
-
 %%--------------------------------------------------------------------
 %% Swagger defines
 %%--------------------------------------------------------------------
@@ -250,7 +238,7 @@ params_gateway_name_in_path() ->
     [
         {name,
             mk(
-                binary(),
+                hoconsc:enum(emqx_gateway_schema:gateway_names()),
                 #{
                     in => path,
                     desc => ?DESC(gateway_name_in_qs),
@@ -450,33 +438,30 @@ fields(gateway_stats) ->
     [{key, mk(binary(), #{})}].
 
 schema_load_or_update_gateways_conf() ->
+    Names = emqx_gateway_schema:gateway_names(),
     emqx_dashboard_swagger:schema_with_examples(
-        hoconsc:union([
-            ref(?MODULE, stomp),
-            ref(?MODULE, mqttsn),
-            ref(?MODULE, coap),
-            ref(?MODULE, lwm2m),
-            ref(?MODULE, exproto),
-            ref(?MODULE, update_stomp),
-            ref(?MODULE, update_mqttsn),
-            ref(?MODULE, update_coap),
-            ref(?MODULE, update_lwm2m),
-            ref(?MODULE, update_exproto),
-            ref(?MODULE, update_gbt32960)
-        ]),
+        hoconsc:union(
+            [
+                ref(?MODULE, Name)
+             || Name <-
+                    Names ++
+                        [
+                            erlang:list_to_existing_atom("update_" ++ erlang:atom_to_list(Name))
+                         || Name <- Names
+                        ]
+            ]
+        ),
         examples_update_gateway_confs()
     ).
 
 schema_gateways_conf() ->
     emqx_dashboard_swagger:schema_with_examples(
-        hoconsc:union([
-            ref(?MODULE, stomp),
-            ref(?MODULE, mqttsn),
-            ref(?MODULE, coap),
-            ref(?MODULE, lwm2m),
-            ref(?MODULE, exproto),
-            ref(?MODULE, gbt32960)
-        ]),
+        hoconsc:union(
+            [
+                ref(?MODULE, Name)
+             || Name <- emqx_gateway_schema:gateway_names()
+            ]
+        ),
         examples_gateway_confs()
     ).
 

apps/emqx_gateway/src/emqx_gateway_api_authn.erl

@@ -327,7 +327,7 @@ params_gateway_name_in_path() ->
     [
         {name,
             mk(
-                binary(),
+                hoconsc:enum(emqx_gateway_schema:gateway_names()),
                 #{
                     in => path,
                     desc => ?DESC(emqx_gateway_api, gateway_name_in_qs),

apps/emqx_gateway/src/emqx_gateway_api_authn_user_import.erl

@@ -52,7 +52,7 @@
 %%--------------------------------------------------------------------
 
 api_spec() ->
-    emqx_dashboard_swagger:spec(?MODULE, #{check_schema => false}).
+    emqx_dashboard_swagger:spec(?MODULE, #{check_schema => true, translate_body => true}).
 
 paths() ->
     [
@@ -157,7 +157,7 @@ params_gateway_name_in_path() ->
     [
         {name,
             mk(
-                binary(),
+                hoconsc:enum(emqx_gateway_schema:gateway_names()),
                 #{
                     in => path,
                     desc => ?DESC(emqx_gateway_api, gateway_name_in_qs),

apps/emqx_gateway/src/emqx_gateway_api_clients.erl

@@ -700,7 +700,7 @@ params_gateway_name_in_path() ->
     [
         {name,
             mk(
-                binary(),
+                hoconsc:enum(emqx_gateway_schema:gateway_names()),
                 #{
                     in => path,
                     desc => ?DESC(emqx_gateway_api, gateway_name)

apps/emqx_gateway/src/emqx_gateway_api_listeners.erl

@@ -609,7 +609,7 @@ params_gateway_name_in_path() ->
     [
         {name,
             mk(
-                binary(),
+                hoconsc:enum(emqx_gateway_schema:gateway_names()),
                 #{
                     in => path,
                     desc => ?DESC(emqx_gateway_api, gateway_name_in_qs),

apps/emqx_gateway/src/emqx_gateway_http.erl

@@ -513,29 +513,23 @@ codestr(501) -> 'NOT_IMPLEMENTED'.
 fmtstr(Fmt, Args) ->
     lists:flatten(io_lib:format(Fmt, Args)).
 
--spec with_authn(binary(), function()) -> any().
+-spec with_authn(atom(), function()) -> any().
 with_authn(GwName0, Fun) ->
     with_gateway(GwName0, fun(GwName, _GwConf) ->
         Authn = emqx_gateway_http:authn(GwName),
         Fun(GwName, Authn)
     end).
 
--spec with_listener_authn(binary(), binary(), function()) -> any().
+-spec with_listener_authn(atom(), binary(), function()) -> any().
 with_listener_authn(GwName0, Id, Fun) ->
     with_gateway(GwName0, fun(GwName, _GwConf) ->
         Authn = emqx_gateway_http:authn(GwName, Id),
         Fun(GwName, Authn)
     end).
 
--spec with_gateway(binary(), function()) -> any().
-with_gateway(GwName0, Fun) ->
+-spec with_gateway(atom(), function()) -> any().
+with_gateway(GwName, Fun) ->
     try
-        GwName =
-            try
-                binary_to_existing_atom(GwName0)
-            catch
-                _:_ -> error(badname)
-            end,
         case emqx_gateway:lookup(GwName) of
             undefined ->
                 return_http_error(404, "Gateway not loaded");

apps/emqx_gateway/src/emqx_gateway_schema.erl

@@ -48,12 +48,13 @@
     ip_port/0
 ]).
 -elvis([{elvis_style, dont_repeat_yourself, disable}]).
+-elvis([{elvis_style, invalid_dynamic_call, disable}]).
 
 -export([namespace/0, roots/0, fields/1, desc/1, tags/0]).
 
 -export([proxy_protocol_opts/0]).
 
--export([mountpoint/0, mountpoint/1, gateway_common_options/0, gateway_schema/1]).
+-export([mountpoint/0, mountpoint/1, gateway_common_options/0, gateway_schema/1, gateway_names/0]).
 
 namespace() -> gateway.
 
@@ -337,13 +338,21 @@ proxy_protocol_opts() ->
 %% dynamic schemas
 
 %% FIXME: don't hardcode the gateway names
-gateway_schema(stomp) -> emqx_stomp_schema:fields(stomp);
-gateway_schema(mqttsn) -> emqx_mqttsn_schema:fields(mqttsn);
-gateway_schema(coap) -> emqx_coap_schema:fields(coap);
-gateway_schema(lwm2m) -> emqx_lwm2m_schema:fields(lwm2m);
-gateway_schema(exproto) -> emqx_exproto_schema:fields(exproto);
-gateway_schema(gbt32960) -> emqx_gbt32960_schema:fields(gbt32960).
+gateway_schema(Name) ->
+    case emqx_gateway_utils:find_gateway_definition(Name) of
+        {ok, #{config_schema_module := SchemaMod}} ->
+            SchemaMod:fields(Name);
+        {error, _} = Error ->
+            throw(Error)
+    end.
 
+gateway_names() ->
+    Definations = emqx_gateway_utils:find_gateway_definitions(),
+    [
+        Name
+     || #{name := Name} = Defination <- Definations,
+        emqx_gateway_utils:check_gateway_edition(Defination)
+    ].
 %%--------------------------------------------------------------------
 %% helpers
 

apps/emqx_gateway/src/emqx_gateway_utils.erl

@@ -45,8 +45,10 @@
     global_chain/1,
     listener_chain/3,
     find_gateway_definitions/0,
+    find_gateway_definition/1,
     plus_max_connections/2,
-    random_clientid/1
+    random_clientid/1,
+    check_gateway_edition/1
 ]).
 
 -export([stringfy/1]).
@@ -538,6 +540,32 @@ find_gateway_definitions() ->
         )
     ).
 
+-spec find_gateway_definition(atom()) -> {ok, map()} | {error, term()}.
+find_gateway_definition(Name) ->
+    ensure_gateway_loaded(),
+    find_gateway_definition(Name, ignore_lib_apps(application:loaded_applications())).
+
+-dialyzer({no_match, [find_gateway_definition/2]}).
+find_gateway_definition(Name, [App | T]) ->
+    Attrs = find_attrs(App, gateway),
+    SearchFun = fun({_App, _Mod, #{name := GwName}}) ->
+        GwName =:= Name
+    end,
+    case lists:search(SearchFun, Attrs) of
+        {value, {_App, _Mod, Defination}} ->
+            case check_gateway_edition(Defination) of
+                true ->
+                    {ok, Defination};
+                _ ->
+                    {error, invalid_edition}
+            end;
+        false ->
+            find_gateway_definition(Name, T)
+    end;
+find_gateway_definition(_Name, []) ->
+    {error, not_found}.
+
+-dialyzer({no_match, [gateways/1]}).
 gateways([]) ->
     [];
 gateways([
@@ -550,7 +578,20 @@ gateways([
             }}
     | More
 ]) when is_atom(Name), is_atom(CbMod), is_atom(SchemaMod) ->
-    [Defination | gateways(More)].
+    case check_gateway_edition(Defination) of
+        true ->
+            [Defination | gateways(More)];
+        _ ->
+            gateways(More)
+    end.
+
+-if(?EMQX_RELEASE_EDITION == ee).
+check_gateway_edition(_Defination) ->
+    true.
+-else.
+check_gateway_edition(Defination) ->
+    ce == maps:get(edition, Defination, ce).
+-endif.
 
 find_attrs(App, Def) ->
     [

apps/emqx_gateway/test/emqx_gateway_api_SUITE.erl

@@ -96,10 +96,8 @@ t_gateways(_) ->
     ok.
 
 t_gateway(_) ->
-    {404, GwNotFoundReq1} = request(get, "/gateways/not_a_known_atom"),
-    assert_not_found(GwNotFoundReq1),
-    {404, GwNotFoundReq2} = request(get, "/gateways/undefined"),
-    assert_not_found(GwNotFoundReq2),
+    ?assertMatch({400, #{code := <<"BAD_REQUEST">>}}, request(get, "/gateways/not_a_known_atom")),
+    ?assertMatch({400, #{code := <<"BAD_REQUEST">>}}, request(get, "/gateways/undefined")),
     {204, _} = request(put, "/gateways/stomp", #{}),
     {200, StompGw} = request(get, "/gateways/stomp"),
     assert_fields_exist(
@@ -110,7 +108,7 @@ t_gateway(_) ->
     {200, #{enable := true}} = request(get, "/gateways/stomp"),
     {204, _} = request(put, "/gateways/stomp", #{enable => false}),
     {200, #{enable := false}} = request(get, "/gateways/stomp"),
-    {404, _} = request(put, "/gateways/undefined", #{}),
+    ?assertMatch({400, #{code := <<"BAD_REQUEST">>}}, request(put, "/gateways/undefined", #{})),
     {400, _} = request(put, "/gateways/stomp", #{bad_key => "foo"}),
     ok.
 
@@ -129,8 +127,14 @@ t_gateway_enable(_) ->
     {200, #{enable := NotEnable}} = request(get, "/gateways/stomp"),
     {204, _} = request(put, "/gateways/stomp/enable/" ++ atom_to_list(Enable), undefined),
     {200, #{enable := Enable}} = request(get, "/gateways/stomp"),
-    {404, _} = request(put, "/gateways/undefined/enable/true", undefined),
-    {404, _} = request(put, "/gateways/not_a_known_atom/enable/true", undefined),
+    ?assertMatch(
+        {400, #{code := <<"BAD_REQUEST">>}},
+        request(put, "/gateways/undefined/enable/true", undefined)
+    ),
+    ?assertMatch(
+        {400, #{code := <<"BAD_REQUEST">>}},
+        request(put, "/gateways/not_a_known_atom/enable/true", undefined)
+    ),
     {404, _} = request(put, "/gateways/coap/enable/true", undefined),
     ok.
 

apps/emqx_gateway_gbt32960/src/emqx_gateway_gbt32960.erl

@@ -12,7 +12,8 @@
 -gateway(#{
     name => gbt32960,
     callback_module => ?MODULE,
-    config_schema_module => emqx_gbt32960_schema
+    config_schema_module => emqx_gbt32960_schema,
+    edition => ee
 }).
 
 %% callback_module must implement the emqx_gateway_impl behaviour

rel/i18n/emqx_gateway_api.hocon

@@ -37,8 +37,7 @@ gateway_name.desc:
 """Gateway Name"""
 
 gateway_name_in_qs.desc:
-"""Gateway Name.<br/>
-It's enum with `stomp`, `mqttsn`, `coap`, `lwm2m`, `exproto`, `gbt32960`"""
+"""Gateway Name"""
 
 gateway_node_status.desc:
 """The status of the gateway on each node in the cluster"""