feature(emqx_mod_rewrite): separate rewrite rules for pub and sub (#3676)

etc/emqx.conf

@@ -1966,8 +1966,8 @@ module.presence.qos = 1
 ## Rewrite Module
 
 ## {rewrite, Topic, Re, Dest}
-## module.rewrite.rule.1 = x/# ^x/y/(.+)$ z/y/$1
+## module.rewrite.pub.rule.1 = x/# ^x/y/(.+)$ z/y/$1
-## module.rewrite.rule.2 = y/+/z/# ^y/(.+)/z/(.+)$ y/z/$2
+## module.rewrite.sub.rule.1 = y/+/z/# ^y/(.+)/z/(.+)$ y/z/$2
 
 ##-------------------------------------------------------------------
 ## Plugins

priv/emqx.schema

@@ -1945,6 +1945,14 @@ end}.
   {datatype, string}
 ]}.
 
+{mapping, "module.rewrite.pub.rule.$id", "emqx.modules", [
+  {datatype, string}
+]}.
+
+{mapping, "module.rewrite.sub.rule.$id", "emqx.modules", [
+  {datatype, string}
+]}.
+
 {translation, "emqx.modules", fun(Conf) ->
   Subscriptions = fun() ->
       List = cuttlefish_variable:filter_by_prefix("module.subscription", Conf),
@@ -1957,10 +1965,16 @@ end}.
   end,
   Rewrites = fun() ->
       Rules = cuttlefish_variable:filter_by_prefix("module.rewrite.rule", Conf),
-      lists:map(fun({[_, "rewrite", "rule", I], Rule}) ->
+      PubRules = cuttlefish_variable:filter_by_prefix("module.rewrite.pub.rule", Conf),
+      SubRules = cuttlefish_variable:filter_by_prefix("module.rewrite.sub.rule", Conf),
+      TotalRules = lists:append(
+                     [ {["module", "rewrite", "pub", "rule", I], Rule} || {["module", "rewrite", "rule", I], Rule} <- Rules] ++ PubRules,
+                     [ {["module", "rewrite", "sub", "rule", I], Rule} || {["module", "rewrite", "rule", I], Rule} <- Rules] ++ SubRules
+                    ),
+      lists:map(fun({[_, "rewrite", PubOrSub, "rule", I], Rule}) ->
                     [Topic, Re, Dest] = string:tokens(Rule, " "),
-                    {rewrite, list_to_binary(Topic), list_to_binary(Re), list_to_binary(Dest)}
+                    {rewrite, list_to_atom(PubOrSub), list_to_binary(Topic), list_to_binary(Re), list_to_binary(Dest)}
-                end, Rules)
+                end, TotalRules)
   end,
   lists:append([
     [{emqx_mod_presence, [{qos, cuttlefish:conf_get("module.presence.qos", Conf, 1)}]}],
@@ -2165,3 +2179,28 @@ end}.
      {size_limit, cuttlefish:conf_get("alarm.size_limit", Conf)},
      {validity_period, cuttlefish:conf_get("alarm.validity_period", Conf)}]
 end}.
+
+%%--------------------------------------------------------------------
+%% Telemetry
+%%--------------------------------------------------------------------
+{mapping, "telemetry.enabled", "emqx.telemetry", [
+  {default, false},
+  {datatype, {enum, [true, false]}}
+]}.
+
+{mapping, "telemetry.url", "emqx.telemetry", [
+  {default, "https://telemetry-emqx-io.bigpar.vercel.app/api/telemetry"},
+  {datatype, string}
+]}.
+
+{mapping, "telemetry.report_interval", "emqx.telemetry", [
+  {default, "7d"},
+  {datatype, {duration, s}}
+]}.
+
+{translation, "emqx.telemetry", fun(Conf) ->
+  [ {enabled,         cuttlefish:conf_get("telemetry.enabled", Conf)}
+  , {url,             cuttlefish:conf_get("telemetry.url", Conf)}
+  , {report_interval, cuttlefish:conf_get("telemetry.report_interval", Conf)}
+  ]
+end}.

src/emqx_mod_rewrite.erl

@@ -44,10 +44,10 @@
 %%--------------------------------------------------------------------
 
 load(RawRules) ->
-    Rules = compile(RawRules),
+    {PubRules, SubRules} = compile(RawRules),
-    emqx_hooks:add('client.subscribe',   {?MODULE, rewrite_subscribe, [Rules]}),
+    emqx_hooks:add('client.subscribe',   {?MODULE, rewrite_subscribe, [SubRules]}),
-    emqx_hooks:add('client.unsubscribe', {?MODULE, rewrite_unsubscribe, [Rules]}),
+    emqx_hooks:add('client.unsubscribe', {?MODULE, rewrite_unsubscribe, [SubRules]}),
-    emqx_hooks:add('message.publish',    {?MODULE, rewrite_publish, [Rules]}).
+    emqx_hooks:add('message.publish',    {?MODULE, rewrite_publish, [PubRules]}).
 
 rewrite_subscribe(_ClientInfo, _Properties, TopicFilters, Rules) ->
     {ok, [{match_and_rewrite(Topic, Rules), Opts} || {Topic, Opts} <- TopicFilters]}.
@@ -70,10 +70,15 @@ description() ->
 %%--------------------------------------------------------------------
 
 compile(Rules) ->
-    lists:map(fun({rewrite, Topic, Re, Dest}) ->
+    PubRules = [ begin
                      {ok, MP} = re:compile(Re),
                      {rewrite, Topic, MP, Dest}
-              end, Rules).
+                 end || {rewrite, pub, Topic, Re, Dest}<- Rules ],
+    SubRules = [ begin
+                     {ok, MP} = re:compile(Re),
+                     {rewrite, Topic, MP, Dest}
+                 end || {rewrite, sub, Topic, Re, Dest}<- Rules ],
+    {PubRules, SubRules}.
 
 match_and_rewrite(Topic, []) ->
     Topic;

test/emqx_mod_rewrite_SUITE.erl

@@ -22,8 +22,8 @@
 -include("emqx_mqtt.hrl").
 -include_lib("eunit/include/eunit.hrl").
 
--define(RULES, [{rewrite,<<"x/#">>,<<"^x/y/(.+)$">>,<<"z/y/$1">>},
+-define(RULES, [{rewrite, pub, <<"x/#">>,<<"^x/y/(.+)$">>,<<"z/y/$1">>},
-                {rewrite,<<"y/+/z/#">>,<<"^y/(.+)/z/(.+)$">>,<<"y/z/$2">>}
+                {rewrite, sub, <<"y/+/z/#">>,<<"^y/(.+)/z/(.+)$">>,<<"y/z/$2">>}
                ]).
 
 all() -> emqx_ct:all(?MODULE).
@@ -43,33 +43,43 @@ t_mod_rewrite(_Config) ->
     ok = emqx_mod_rewrite:load(?RULES),
     {ok, C} = emqtt:start_link([{clientid, <<"rewrite_client">>}]),
     {ok, _} = emqtt:connect(C),
-    OrigTopics = [<<"x/y/2">>, <<"x/1/2">>, <<"y/a/z/b">>, <<"y/def">>],
+    PubOrigTopics = [<<"x/y/2">>, <<"x/1/2">>],
-    DestTopics = [<<"z/y/2">>, <<"x/1/2">>, <<"y/z/b">>, <<"y/def">>],
+    PubDestTopics = [<<"z/y/2">>, <<"x/1/2">>],
-    %% Subscribe
+    SubOrigTopics = [<<"y/a/z/b">>, <<"y/def">>],
-    {ok, _Props, _} = emqtt:subscribe(C, [{Topic, ?QOS_1} || Topic <- OrigTopics]),
+    SubDestTopics = [<<"y/z/b">>, <<"y/def">>],
+    %% Sub Rules
+    {ok, _Props, _} = emqtt:subscribe(C, [{Topic, ?QOS_1} || Topic <- SubOrigTopics]),
     timer:sleep(100),
     Subscriptions = emqx_broker:subscriptions(<<"rewrite_client">>),
-    ?assertEqual(DestTopics, [Topic || {Topic, _SubOpts} <- Subscriptions]),
+    ?assertEqual(SubDestTopics, [Topic || {Topic, _SubOpts} <- Subscriptions]),
-    %% Publish
+    RecvTopics1 = [begin
-    RecvTopics = [begin
                       ok = emqtt:publish(C, Topic, <<"payload">>),
                       {ok, #{topic := RecvTopic}} = receive_publish(100),
                       RecvTopic
-                  end || Topic <- OrigTopics],
+                  end || Topic <- SubDestTopics],
-    ?assertEqual(DestTopics, RecvTopics),
+    ?assertEqual(SubDestTopics, RecvTopics1),
-    %% Unsubscribe
+    {ok, _, _} = emqtt:unsubscribe(C, SubOrigTopics),
-    {ok, _, _} = emqtt:unsubscribe(C, OrigTopics),
     timer:sleep(100),
     ?assertEqual([], emqx_broker:subscriptions(<<"rewrite_client">>)),
+    %% Pub Rules
+    {ok, _Props, _} = emqtt:subscribe(C, [{Topic, ?QOS_1} || Topic <- PubDestTopics]),
+    RecvTopics2 = [begin
+                      ok = emqtt:publish(C, Topic, <<"payload">>),
+                      {ok, #{topic := RecvTopic}} = receive_publish(100),
+                      RecvTopic
+                  end || Topic <- PubOrigTopics],
+    ?assertEqual(PubDestTopics, RecvTopics2),
+    {ok, _, _} = emqtt:unsubscribe(C, PubDestTopics),
+
     ok = emqtt:disconnect(C),
     ok = emqx_mod_rewrite:unload(?RULES).
 
 t_rewrite_rule(_Config) ->
-    Rules = emqx_mod_rewrite:compile(?RULES),
+    {PubRules, SubRules} = emqx_mod_rewrite:compile(?RULES),
-    ?assertEqual(<<"z/y/2">>, emqx_mod_rewrite:match_and_rewrite(<<"x/y/2">>, Rules)),
+    ?assertEqual(<<"z/y/2">>, emqx_mod_rewrite:match_and_rewrite(<<"x/y/2">>, PubRules)),
-    ?assertEqual(<<"x/1/2">>, emqx_mod_rewrite:match_and_rewrite(<<"x/1/2">>, Rules)),
+    ?assertEqual(<<"x/1/2">>, emqx_mod_rewrite:match_and_rewrite(<<"x/1/2">>, PubRules)),
-    ?assertEqual(<<"y/z/b">>, emqx_mod_rewrite:match_and_rewrite(<<"y/a/z/b">>, Rules)),
+    ?assertEqual(<<"y/z/b">>, emqx_mod_rewrite:match_and_rewrite(<<"y/a/z/b">>, SubRules)),
-    ?assertEqual(<<"y/def">>, emqx_mod_rewrite:match_and_rewrite(<<"y/def">>, Rules)).
+    ?assertEqual(<<"y/def">>, emqx_mod_rewrite:match_and_rewrite(<<"y/def">>, SubRules)).
 
 %%--------------------------------------------------------------------
 %% Internal functions