fix(emqx_connector): the HTTP API for emqx_connector_mysql

apps/emqx_connector/src/emqx_connector_mysql.erl

@@ -21,7 +21,8 @@
 -emqx_resource_api_path("connectors/mysql").
 
 -export([ fields/1
-        , on_config_to_file/1
+        , on_jsonify/1
+        , on_api_reply_format/1
         ]).
 
 %% callbacks of behaviour emqx_resource
@@ -40,8 +41,21 @@ fields("config") ->
     emqx_connector_schema_lib:relational_db_fields() ++
     emqx_connector_schema_lib:ssl_fields().
 
-on_config_to_file(#{server := Server} = Config) ->
-    Config#{server => emqx_connector_schema_lib:ip_port_to_string(Server)}.
+on_jsonify(#{server := Server, user := User, database := DB, password := Passwd,
+             cacertfile := CAFile, keyfile := KeyFile, certfile := CertFile} = Config) ->
+    Config#{
+        user => list_to_binary(User),
+        database => list_to_binary(DB),
+        password => list_to_binary(Passwd),
+        server => emqx_connector_schema_lib:ip_port_to_string(Server),
+        cacertfile => list_to_binary(CAFile),
+        keyfile => list_to_binary(KeyFile),
+        certfile => list_to_binary(CertFile)
+    }.
+
+on_api_reply_format(ResourceData) ->
+    #{config := Conf} = Reply0 = emqx_resource_api:default_api_reply_format(ResourceData),
+    Reply0#{config => maps:without([cacertfile, keyfile, certfile, verify], Conf)}.
 
 %% ===================================================================
 

apps/emqx_connector/src/emqx_connector_schema_lib.erl

@@ -118,4 +118,4 @@ to_ip_port(Str) ->
      end.
 
 ip_port_to_string({Ip, Port}) ->
-    inet:ntoa(Ip) ++ ":" ++ integer_to_list(Port).
+    iolist_to_binary([inet:ntoa(Ip), ":", integer_to_list(Port)]).

apps/emqx_resource/rebar.config

@@ -1,6 +1,6 @@
 {erl_opts, [ debug_info
            , nowarn_unused_import
-           %, {d, 'RESOURCE_DEBUG'}
+           , {d, 'RESOURCE_DEBUG'}
            ]}.
 
 {erl_first_files, ["src/emqx_resource_transform.erl"]}.

apps/emqx_resource/src/emqx_resource.erl

@@ -65,7 +65,8 @@
         , call_health_check/3 %% verify if the resource is working normally
         , call_stop/3   %% stop the instance
         , call_config_merge/4 %% merge the config when updating
-        , call_config_to_file/2
+        , call_jsonify/2
+        , call_api_reply_format/2
         ]).
 
 -export([ list_instances/0 %% list all the instances, id only.
@@ -84,16 +85,16 @@
 
 -optional_callbacks([ on_query/4
                     , on_health_check/2
-                    , on_api_reply_format/1
                     , on_config_merge/3
-                    , on_config_to_file/1
+                    , on_jsonify/1
+                    , on_api_reply_format/1
                     ]).
 
--callback on_api_reply_format(resource_data()) -> map().
+-callback on_api_reply_format(resource_data()) -> jsx:json_term().
 
 -callback on_config_merge(resource_config(), resource_config(), term()) -> resource_config().
 
--callback on_config_to_file(resource_config()) -> jsx:json_term().
+-callback on_jsonify(resource_config()) -> jsx:json_term().
 
 %% when calling emqx_resource:start/1
 -callback on_start(instance_id(), resource_config()) ->
@@ -243,11 +244,28 @@ call_stop(InstId, Mod, ResourceState) ->
 -spec call_config_merge(module(), resource_config(), resource_config(), term()) ->
     resource_config().
 call_config_merge(Mod, OldConfig, NewConfig, Params) ->
-    ?SAFE_CALL(Mod:on_config_merge(OldConfig, NewConfig, Params)).
+    case erlang:function_exported(Mod, on_jsonify, 1) of
+        true ->
+            ?SAFE_CALL(Mod:on_config_merge(OldConfig, NewConfig, Params));
+        false when is_map(OldConfig), is_map(NewConfig) ->
+            maps:merge(OldConfig, NewConfig);
+        false ->
+            NewConfig
+    end.
 
--spec call_config_to_file(module(), resource_config()) -> jsx:json_term().
-call_config_to_file(Mod, Config) ->
-    ?SAFE_CALL(Mod:on_config_to_file(Config)).
+-spec call_jsonify(module(), resource_config()) -> jsx:json_term().
+call_jsonify(Mod, Config) ->
+    case erlang:function_exported(Mod, on_jsonify, 1) of
+        false -> Config;
+        true -> ?SAFE_CALL(Mod:on_jsonify(Config))
+    end.
+
+-spec call_api_reply_format(module(), resource_data()) -> jsx:json_term().
+call_api_reply_format(Mod, Data) ->
+    case erlang:function_exported(Mod, on_api_reply_format, 1) of
+        false -> emqx_resource_api:default_api_reply_format(Data);
+        true -> ?SAFE_CALL(Mod:on_api_reply_format(Data))
+    end.
 
 -spec parse_config(resource_type(), binary() | term()) ->
     {ok, resource_config()} | {error, term()}.

apps/emqx_resource/src/emqx_resource_api.erl

@@ -20,6 +20,9 @@
         , put/3
         , delete/3
         ]).
+
+-export([default_api_reply_format/1]).
+
 get_all(Mod, _Binding, _Params) ->
     {200, #{code => 0, data =>
         [format_data(Mod, Data) || Data <- emqx_resource:list_instances_verbose()]}}.
@@ -63,15 +66,11 @@ delete(_Mod, #{id := Id}, _Params) ->
     end.
 
 format_data(Mod, Data) ->
-    case erlang:function_exported(Mod, on_api_reply_format, 1) of
-        false ->
-            default_api_reply_format(Data);
-        true ->
-            Mod:on_api_reply_format(Data)
-    end.
+    emqx_resource:call_api_reply_format(Mod, Data).
 
-default_api_reply_format(#{id := Id, status := Status, config := Config}) ->
-    #{node => node(), id => Id, status => Status, config => Config}.
+default_api_reply_format(#{id := Id, mod := Mod, status := Status, config := Config}) ->
+    #{node => node(), id => Id, status => Status, resource_type => Mod,
+      config => emqx_resource:call_jsonify(Mod, Config)}.
 
 stringnify(Bin) when is_binary(Bin) -> Bin;
 stringnify(Str) when is_list(Str) -> list_to_binary(Str);

apps/emqx_resource/src/emqx_resource_instance.erl

@@ -134,7 +134,7 @@ save_config_to_disk(InstId, ResourceType, Config) ->
     %% will dump configs for all instances (from an ETS table) to a file.
     file:write_file(filename:join([emqx_data_dir(), binary_to_list(InstId) ++ ".conf"]),
         jsx:encode(#{id => InstId, resource_type => ResourceType,
-                     config => emqx_resource:call_config_to_file(ResourceType, Config)})).
+                     config => emqx_resource:call_jsonify(ResourceType, Config)})).
 
 emqx_data_dir() ->
     "data".

apps/emqx_resource/src/emqx_resource_transform.erl

@@ -57,7 +57,8 @@ forms(_, []) -> [].
 form(Mod, Form) ->
     case Form of
         ?Q("-emqx_resource_api_path('@Path').") ->
-            {fix_spec_attrs() ++ fix_api_attrs(erl_syntax:concrete(Path)) ++ fix_api_exports(),
+            {fix_spec_attrs() ++ fix_api_attrs(Mod, erl_syntax:concrete(Path))
+             ++ fix_api_exports(),
              [],
              fix_spec_funcs(Mod) ++ fix_api_funcs(Mod)};
         _ ->
@@ -75,18 +76,17 @@ fix_spec_funcs(_Mod) ->
     , ?Q("structs() -> [\"config\"].")
     ].
 
-fix_api_attrs(Path0) ->
-    BaseName = filename:basename(Path0),
-    Path = "/" ++ BaseName,
+fix_api_attrs(Mod, Path) ->
+    BaseName = atom_to_list(Mod),
     [erl_syntax:revert(
         erl_syntax:attribute(?Q("rest_api"), [
             erl_syntax:abstract(#{
-                name => list_to_atom(Name ++ "_log_tracers"),
+                name => list_to_atom(Act ++ "_" ++ BaseName),
                 method => Method,
                 path => mk_path(Path, WithId),
                 func => Func,
-                descr => Name ++ " the " ++ BaseName})]))
-       || {Name, Method, WithId, Func} <- [
+                descr => Act ++ " the " ++ BaseName})]))
+       || {Act, Method, WithId, Func} <- [
             {"list", 'GET', noid, api_get_all},
             {"get", 'GET', id, api_get},
             {"update", 'PUT', id, api_put},
@@ -110,5 +110,5 @@ fix_api_funcs(Mod) ->
             emqx_resource_api:delete('@Mod@', Binding, Params)."))
     ].
 
-mk_path(Path, id) -> Path ++ "/:bin:id";
+mk_path(Path, id) -> string:trim(Path, trailing, "/") ++ "/:bin:id";
 mk_path(Path, noid) -> Path.