fix(mgmt): pubsub api use bad params caused sub client crash

apps/emqx_management/src/emqx_mgmt_api_pubsub.erl

@@ -71,19 +71,10 @@ subscribe(_Bindings, Params) ->
 
 publish(_Bindings, Params) ->
     logger:debug("API publish Params:~p", [Params]),
-    {ClientId, Topic, Qos, Retain, Payload, UserProps} = parse_publish_params(Params),
+    try parse_publish_params(Params) of
-    case do_publish(ClientId, Topic, Qos, Retain, Payload, UserProps) of
+        Result -> do_publish(Params, Result)
-        {ok, MsgIds} ->
+    catch
-            case proplists:get_value(<<"return">>, Params, undefined) of
+        _E : _R -> minirest:return({ok, ?ERROR8, bad_params})
-                undefined -> minirest:return(ok);
-                _Val ->
-                    case proplists:get_value(<<"topics">>, Params, undefined) of
-                        undefined -> minirest:return({ok, #{msgid => lists:last(MsgIds)}});
-                        _ -> minirest:return({ok, #{msgids => MsgIds}})
-                    end
-            end;
-        Result ->
-            minirest:return(Result)
     end.
 
 unsubscribe(_Bindings, Params) ->
@@ -124,14 +115,19 @@ loop_publish(Params) ->
 loop_publish([], Result) ->
     lists:reverse(Result);
 loop_publish([Params | ParamsN], Acc) ->
-    {ClientId, Topic, Qos, Retain, Payload, UserProps} = parse_publish_params(Params),
+    Result =
-    Code = case do_publish(ClientId, Topic, Qos, Retain, Payload, UserProps) of
+        try parse_publish_params(Params) of
-        {ok, _} -> 0;
+            Res ->
-        {_, Code0, _} -> Code0
+                Code = case do_publish(Params, Res) of
-    end,
+                           {ok, _} -> 0;
-    Result = #{topic => resp_topic(proplists:get_value(<<"topic">>, Params),
+                           {_, Code0, _} -> Code0
-                                   proplists:get_value(<<"topics">>, Params, <<"">>)),
+                       end,
-               code => Code},
+                #{topic => resp_topic(proplists:get_value(<<"topic">>, Params),
+                                      proplists:get_value(<<"topics">>, Params, <<"">>)),
+                  code => Code}
+        catch
+            _E : _R -> #{code => ?ERROR8, message => <<"bad_params">>}
+        end,
     loop_publish(ParamsN, [Result | Acc]).
 
 loop_unsubscribe(Params) ->
@@ -163,6 +159,21 @@ do_subscribe(ClientId, Topics, QoS) ->
         _ -> ok
     end.
 
+do_publish(Params, {ClientId, Topic, Qos, Retain, Payload, UserProps}) ->
+    case do_publish(ClientId, Topic, Qos, Retain, Payload, UserProps) of
+        {ok, MsgIds} ->
+            case proplists:get_value(<<"return">>, Params, undefined) of
+                undefined -> minirest:return(ok);
+                _Val ->
+                    case proplists:get_value(<<"topics">>, Params, undefined) of
+                        undefined -> minirest:return({ok, #{msgid => lists:last(MsgIds)}});
+                        _ -> minirest:return({ok, #{msgids => MsgIds}})
+                    end
+            end;
+        Result ->
+            minirest:return(Result)
+    end.
+
 do_publish(ClientId, _Topics, _Qos, _Retain, _Payload, _UserProps)
   when not (is_binary(ClientId) or (ClientId =:= undefined)) ->
     {ok, ?ERROR8, <<"bad clientid: must be string">>};
@@ -207,7 +218,7 @@ parse_publish_params(Params) ->
     Qos       = proplists:get_value(<<"qos">>, Params, 0),
     Retain    = proplists:get_value(<<"retain">>, Params, false),
     Payload1  = maybe_maps_to_binary(Payload),
-    UserProps = check_user_props(proplists:get_value(<<"user_properties">>, Params, [])),
+    UserProps = generate_user_props(proplists:get_value(<<"user_properties">>, Params, [])),
     {ClientId, Topics, Qos, Retain, Payload1, UserProps}.
 
 parse_unsubscribe_params(Params) ->
@@ -263,7 +274,23 @@ maybe_maps_to_binary(Payload) ->
          error({encode_payload_fail, S})
   end.
 
-check_user_props(UserProps) when is_list(UserProps) ->
+generate_user_props(UserProps) when is_list(UserProps)->
-    UserProps;
+    generate_user_props_(UserProps, []);
-check_user_props(UserProps) ->
+generate_user_props(UserProps) ->
     error({user_properties_type_error, UserProps}).
+
+generate_user_props_([{Name, Value} | Rest], Acc) ->
+    generate_user_props_(Rest, [{bin(Name), bin(Value)} | Acc]);
+generate_user_props_([], Acc) ->
+    lists:reverse(Acc).
+
+bin(Bin) when is_binary(Bin) -> Bin;
+bin(Num) when is_number(Num) -> number_to_binary(Num);
+bin(Boolean) when is_boolean(Boolean) -> atom_to_binary(Boolean);
+bin(Other) -> error({user_properties_type_error, Other}).
+
+-define(FLOAT_PRECISION, 17).
+number_to_binary(Int) when is_integer(Int) ->
+    integer_to_binary(Int);
+number_to_binary(Float) when is_float(Float) ->
+    float_to_binary(Float, [{decimals, ?FLOAT_PRECISION}, compact]).