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Merge pull request #6142 from HJianBo/put-message-headers 

Fill the message headers
This commit is contained in:
Zaiming (Stone) Shi 2021-11-12 12:51:48 +01:00 committed by GitHub
parent d512c474be 54bb3ddaf2
commit 5f8d9db64b
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GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 170 additions and 63 deletions
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2
apps/emqx_coap/src/emqx_coap.app.src
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@ -1,6 +1,6 @@
{application, emqx_coap,
[{description, "EMQ X CoAP Gateway"},
{vsn, "4.3.0"}, % strict semver, bump manually!
{vsn, "4.3.1"}, % strict semver, bump manually!
{modules, []},
{registered, []},
{applications, [kernel,stdlib,gen_coap]},

9
apps/emqx_coap/src/emqx_coap.appup.src Normal file
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@ -0,0 +1,9 @@
%% -*-: erlang -*-
{VSN,
[{"4.3.0",[
{load_module, emqx_coap_mqtt_adapter, brutal_purge, soft_purge, []}]},
{<<".*">>, []}],
[{"4.3.0",[
{load_module, emqx_coap_mqtt_adapter, brutal_purge, soft_purge, []}]},
{<<".*">>, []}]
}.

26
apps/emqx_coap/src/emqx_coap_mqtt_adapter.erl
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@ -58,6 +58,8 @@
-define(SUBOPTS, #{rh => 0, rap => 0, nl => 0, qos => ?QOS_0, is_new => false}).
-define(PROTO_VER, 1).
%%--------------------------------------------------------------------
%% API
%%--------------------------------------------------------------------
@ -139,7 +141,7 @@ handle_call({subscribe, Topic, CoapPid}, _From, State=#state{sub_topics = TopicL
NewTopics = proplists:delete(Topic, TopicList),
IsWild = emqx_topic:wildcard(Topic),
{reply, chann_subscribe(Topic, State), State#state{sub_topics =
[{Topic, {IsWild, CoapPid}}|NewTopics]}, hibernate};
[{Topic, {IsWild, CoapPid}} | NewTopics]}, hibernate};
handle_call({unsubscribe, Topic, _CoapPid}, _From, State=#state{sub_topics = TopicList}) ->
NewTopics = proplists:delete(Topic, TopicList),
@ -244,15 +246,26 @@ chann_publish(Topic, Payload, State = #state{clientid = ClientId}) ->
case emqx_access_control:check_acl(clientinfo(State), publish, Topic) of
allow ->
_ = emqx_broker:publish(
emqx_message:set_flag(retain, false,
emqx_message:make(ClientId, ?QOS_0, Topic, Payload))),
ok;
packet_to_message(Topic, Payload, State)), ok;
deny ->
?LOG(warning, "publish to ~p by clientid ~p failed due to acl check.",
[Topic, ClientId]),
{error, forbidden}
end.
packet_to_message(Topic, Payload,
#state{clientid = ClientId,
username = Username,
peername = {PeerHost, _}}) ->
Message = emqx_message:set_flag(
retain, false,
emqx_message:make(ClientId, ?QOS_0, Topic, Payload)
),
emqx_message:set_headers(
#{ proto_ver => ?PROTO_VER
, protocol => coap
, username => Username
, peerhost => PeerHost}, Message).
%%--------------------------------------------------------------------
%% Deliver
@ -270,7 +283,7 @@ do_deliver({Topic, Payload}, Subscribers) ->
deliver_to_coap(_TopicName, _Payload, []) ->
ok;
deliver_to_coap(TopicName, Payload, [{TopicFilter, {IsWild, CoapPid}}|T]) ->
deliver_to_coap(TopicName, Payload, [{TopicFilter, {IsWild, CoapPid}} | T]) ->
Matched = case IsWild of
true -> emqx_topic:match(TopicName, TopicFilter);
false -> TopicName =:= TopicFilter
@ -324,7 +337,7 @@ conninfo(#state{peername = Peername,
peercert => nossl, %% TODO: dtls
conn_mod => ?MODULE,
proto_name => <<"CoAP">>,
proto_ver => 1,
proto_ver => ?PROTO_VER,
clean_start => true,
clientid => ClientId,
username => undefined,
@ -384,4 +397,3 @@ clientinfo(#state{peername = {PeerHost, _},
mountpoint => undefined,
ws_cookie => undefined
}.

2
apps/emqx_exproto/src/emqx_exproto.app.src
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@ -1,6 +1,6 @@
{application, emqx_exproto,
[{description, "EMQ X Extension for Protocol"},
{vsn, "4.3.4"}, %% 4.3.3 is used by ee
{vsn, "4.3.5"}, %% 4.3.3 is used by ee
{modules, []},
{registered, []},
{mod, {emqx_exproto_app, []}},

8
apps/emqx_exproto/src/emqx_exproto.appup.src
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@ -1,6 +1,8 @@
%% -*- mode: erlang -*-
{VSN,
[{"4.3.3",
[{"4.3.4",
[{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
{"4.3.3",
[{load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
{"4.3.2",
@ -12,7 +14,9 @@
{load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
{<<".*">>,[]}],
[{"4.3.3",
[{"4.3.4",
[{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
{"4.3.3",
[{load_module,emqx_exproto_conn,brutal_purge,soft_purge,[]},
{load_module,emqx_exproto_channel,brutal_purge,soft_purge,[]}]},
{"4.3.2",

27
apps/emqx_exproto/src/emqx_exproto_channel.erl
View File

@ -340,17 +340,14 @@ handle_call({unsubscribe, TopicFilter},
handle_call({publish, Topic, Qos, Payload},
Channel = #channel{
conn_state = connected,
clientinfo = ClientInfo
= #{clientid := From,
mountpoint := Mountpoint}}) ->
clientinfo = ClientInfo}) ->
case is_acl_enabled(ClientInfo) andalso
emqx_access_control:check_acl(ClientInfo, publish, Topic) of
deny ->
{reply, {error, ?RESP_PERMISSION_DENY, <<"ACL deny">>}, Channel};
_ ->
Msg = emqx_message:make(From, Qos, Topic, Payload),
NMsg = emqx_mountpoint:mount(Mountpoint, Msg),
_ = emqx:publish(NMsg),
Msg = packet_to_message(Topic, Qos, Payload, Channel),
_ = emqx:publish(Msg),
{reply, ok, Channel}
end;
@ -419,6 +416,24 @@ is_anonymous(_AuthResult) -> false.
clean_anonymous_clients() ->
ets:delete(?CHAN_CONN_TAB, ?CHANMOCK(self())).
packet_to_message(Topic, Qos, Payload,
#channel{
conninfo = #{proto_ver := ProtoVer},
clientinfo = #{
protocol := Protocol,
clientid := ClientId,
username := Username,
peerhost := PeerHost,
mountpoint := Mountpoint}}) ->
Msg = emqx_message:make(
ClientId, Qos,
Topic, Payload, #{},
#{proto_ver => ProtoVer,
protocol => Protocol,
username => Username,
peerhost => PeerHost}),
emqx_mountpoint:mount(Mountpoint, Msg).
%%--------------------------------------------------------------------
%% Sub/UnSub
%%--------------------------------------------------------------------

2
apps/emqx_lwm2m/src/emqx_lwm2m.app.src
View File

@ -1,6 +1,6 @@
{application,emqx_lwm2m,
[{description,"EMQ X LwM2M Gateway"},
{vsn, "4.3.4"}, % strict semver, bump manually!
{vsn, "4.3.5"}, % strict semver, bump manually!
{modules,[]},
{registered,[emqx_lwm2m_sup]},
{applications,[kernel,stdlib,lwm2m_coap]},

12
apps/emqx_lwm2m/src/emqx_lwm2m.appup.src
View File

@ -1,5 +1,5 @@
%% -*-: erlang -*-
{"4.3.4",
{VSN,
[
{<<"4\\.3\\.[0-1]">>, [
{restart_application, emqx_lwm2m}
@ -7,7 +7,10 @@
{"4.3.2", [
{load_module, emqx_lwm2m_message, brutal_purge, soft_purge, []}
]},
{"4.3.3", []} %% only config change
{"4.3.3", []}, %% only config change
{"4.3.4", [
{load_module, emqx_lwm2m_protocol, brutal_purge, soft_purge, []}
]}
],
[
{<<"4\\.3\\.[0-1]">>, [
@ -16,6 +19,9 @@
{"4.3.2", [
{load_module, emqx_lwm2m_message, brutal_purge, soft_purge, []}
]},
{"4.3.3", []} %% only config change
{"4.3.3", []}, %% only config change
{"4.3.4", [
{load_module, emqx_lwm2m_protocol, brutal_purge, soft_purge, []}
]}
]
}.

65
apps/emqx_lwm2m/src/emqx_lwm2m_protocol.erl
View File

@ -74,7 +74,8 @@ call(Pid, Msg, Timeout) ->
Error -> {error, Error}
end.
init(CoapPid, EndpointName, Peername = {_Peerhost, _Port}, RegInfo = #{<<"lt">> := LifeTime, <<"lwm2m">> := Ver}) ->
init(CoapPid, EndpointName, Peername = {_Peerhost, _Port},
RegInfo = #{<<"lt">> := LifeTime, <<"lwm2m">> := Ver}) ->
Mountpoint = proplists:get_value(mountpoint, lwm2m_coap_responder:options(), ""),
Lwm2mState = #lwm2m_state{peername = Peername,
endpoint_name = EndpointName,
@ -103,9 +104,10 @@ init(CoapPid, EndpointName, Peername = {_Peerhost, _Port}, RegInfo = #{<<"lt">>
emqx_cm:register_channel(EndpointName, CoapPid, conninfo(Lwm2mState1))
end),
emqx_cm:insert_channel_info(EndpointName, info(Lwm2mState1), stats(Lwm2mState1)),
emqx_lwm2m_cm:register_channel(EndpointName, RegInfo, LifeTime, Ver, Peername),
emqx_lwm2m_cm:register_channel(EndpointName, RegInfo, LifeTime, Ver, Peername),
{ok, Lwm2mState1#lwm2m_state{life_timer = emqx_lwm2m_timer:start_timer(LifeTime, {life_timer, expired})}};
NTimer = emqx_lwm2m_timer:start_timer(LifeTime, {life_timer, expired}),
{ok, Lwm2mState1#lwm2m_state{life_timer = NTimer}};
{error, Error} ->
_ = run_hooks('client.connack', [conninfo(Lwm2mState), not_authorized], undefined),
{error, Error}
@ -133,7 +135,7 @@ update_reg_info(NewRegInfo, Lwm2mState=#lwm2m_state{life_timer = LifeTimer, regi
%% - report the registration info update, but only when objectList is updated.
case NewRegInfo of
#{<<"objectList">> := _} ->
emqx_lwm2m_cm:update_reg_info(Epn, NewRegInfo),
emqx_lwm2m_cm:update_reg_info(Epn, NewRegInfo),
send_to_broker(<<"update">>, #{<<"data">> => UpdatedRegInfo}, Lwm2mState);
_ -> ok
end
@ -186,7 +188,8 @@ deliver(#message{topic = Topic, payload = Payload},
started_at = StartedAt,
endpoint_name = EndpointName}) ->
IsCacheMode = is_cache_mode(RegInfo, StartedAt),
?LOG(debug, "Get MQTT message from broker, IsCacheModeNow?: ~p, Topic: ~p, Payload: ~p", [IsCacheMode, Topic, Payload]),
?LOG(debug, "Get MQTT message from broker, IsCacheModeNow?: ~p, "
"Topic: ~p, Payload: ~p", [IsCacheMode, Topic, Payload]),
AlternatePath = maps:get(<<"alternatePath">>, RegInfo, <<"/">>),
deliver_to_coap(AlternatePath, Payload, CoapPid, IsCacheMode, EndpointName),
Lwm2mState.
@ -235,8 +238,20 @@ unsubscribe(Topic, Lwm2mState = #lwm2m_state{endpoint_name = _EndpointName}) ->
emqx_broker:unsubscribe(Topic),
emqx_hooks:run('session.unsubscribed', [clientinfo(Lwm2mState), Topic, Opts]).
publish(Topic, Payload, Qos, EndpointName) ->
emqx_broker:publish(emqx_message:set_flag(retain, false, emqx_message:make(EndpointName, Qos, Topic, Payload))).
publish(Topic, Payload, Qos,
#lwm2m_state{
version = ProtoVer,
peername = {PeerHost, _},
endpoint_name = EndpointName}) ->
Message = emqx_message:set_flag(
retain, false,
emqx_message:make(EndpointName, Qos, Topic, Payload)
),
NMessage = emqx_message:set_headers(
#{proto_ver => ProtoVer,
protocol => lwm2m,
peerhost => PeerHost}, Message),
emqx_broker:publish(NMessage).
time_now() -> erlang:system_time(millisecond).
@ -244,7 +259,8 @@ time_now() -> erlang:system_time(millisecond).
%% Deliver downlink message to coap
%%--------------------------------------------------------------------
deliver_to_coap(AlternatePath, JsonData, CoapPid, CacheMode, EndpointName) when is_binary(JsonData)->
deliver_to_coap(AlternatePath, JsonData,
CoapPid, CacheMode, EndpointName) when is_binary(JsonData)->
try
TermData = emqx_json:decode(JsonData, [return_maps]),
deliver_to_coap(AlternatePath, TermData, CoapPid, CacheMode, EndpointName)
@ -273,7 +289,8 @@ deliver_to_coap(AlternatePath, TermData, CoapPid, CacheMode, EndpointName) when
send_to_broker(EventType, Payload = #{}, Lwm2mState) ->
do_send_to_broker(EventType, Payload, Lwm2mState).
do_send_to_broker(EventType, #{<<"data">> := Data} = Payload, #lwm2m_state{endpoint_name = EndpointName} = Lwm2mState) ->
do_send_to_broker(EventType, #{<<"data">> := Data} = Payload,
#lwm2m_state{endpoint_name = EndpointName} = Lwm2mState) ->
ReqPath = maps:get(<<"reqPath">>, Data, undefined),
Code = maps:get(<<"code">>, Data, undefined),
CodeMsg = maps:get(<<"codeMsg">>, Data, undefined),
@ -281,7 +298,7 @@ do_send_to_broker(EventType, #{<<"data">> := Data} = Payload, #lwm2m_state{endpo
emqx_lwm2m_cm:register_cmd(EndpointName, ReqPath, EventType, {Code, CodeMsg, Content}),
NewPayload = maps:put(<<"msgType">>, EventType, Payload),
Topic = uplink_topic(EventType, Lwm2mState),
publish(Topic, emqx_json:encode(NewPayload), _Qos = 0, Lwm2mState#lwm2m_state.endpoint_name).
publish(Topic, emqx_json:encode(NewPayload), _Qos = 0, Lwm2mState).
%%--------------------------------------------------------------------
%% Auto Observe
@ -315,18 +332,27 @@ auto_observe(AlternatePath, ObjectList, CoapPid, EndpointName) ->
observe_object_list(AlternatePath, ObjectList, CoapPid, EndpointName) ->
lists:foreach(fun(ObjectPath) ->
[ObjId| LastPath] = emqx_lwm2m_cmd_handler:path_list(ObjectPath),
[ObjId | LastPath] = emqx_lwm2m_cmd_handler:path_list(ObjectPath),
case ObjId of
<<"19">> ->
[ObjInsId | _LastPath1] = LastPath,
case ObjInsId of
<<"0">> ->
observe_object_slowly(AlternatePath, <<"/19/0/0">>, CoapPid, 100, EndpointName);
observe_object_slowly(
AlternatePath, <<"/19/0/0">>,
CoapPid, 100, EndpointName
);
_ ->
observe_object_slowly(AlternatePath, ObjectPath, CoapPid, 100, EndpointName)
observe_object_slowly(
AlternatePath, ObjectPath,
CoapPid, 100, EndpointName
)
end;
_ ->
observe_object_slowly(AlternatePath, ObjectPath, CoapPid, 100, EndpointName)
observe_object_slowly(
AlternatePath, ObjectPath,
CoapPid, 100, EndpointName
)
end
end, ObjectList).
@ -380,11 +406,12 @@ get_cached_downlink_messages() ->
is_cache_mode(RegInfo, StartedAt) ->
case is_psm(RegInfo) orelse is_qmode(RegInfo) of
true ->
QModeTimeWind = proplists:get_value(qmode_time_window, lwm2m_coap_responder:options(), 22),
Now = time_now(),
if (Now - StartedAt) >= QModeTimeWind -> true;
true -> false
end;
QModeTimeWind = proplists:get_value(
qmode_time_window,
lwm2m_coap_responder:options(),
22
),
(time_now() - StartedAt) >= QModeTimeWind;
false -> false
end.

2
apps/emqx_stomp/src/emqx_stomp.app.src
View File

@ -1,6 +1,6 @@
{application, emqx_stomp,
[{description, "EMQ X Stomp Protocol Plugin"},
{vsn, "4.3.2"}, % strict semver, bump manually!
{vsn, "4.3.3"}, % strict semver, bump manually!
{modules, []},
{registered, [emqx_stomp_sup]},
{applications, [kernel,stdlib]},

10
apps/emqx_stomp/src/emqx_stomp.appup.src
View File

@ -1,11 +1,17 @@
%% -*- mode: erlang -*-
{VSN,
[{"4.3.1",[{load_module,emqx_stomp_connection,brutal_purge,soft_purge,[]}]},
[{"4.3.2",[{load_module,emqx_stomp_protocol,brutal_purge,soft_purge,[]}]},
{"4.3.1",[
{load_module,emqx_stomp_protocol,brutal_purge,soft_purge,[]},
{load_module,emqx_stomp_connection,brutal_purge,soft_purge,[]}]},
{"4.3.0",
[{restart_application,emqx_stomp},
{apply,{emqx_stomp,force_clear_after_app_stoped,[]}}]},
{<<".*">>,[]}],
[{"4.3.1",[{load_module,emqx_stomp_connection,brutal_purge,soft_purge,[]}]},
[{"4.3.2",[{load_module,emqx_stomp_protocol,brutal_purge,soft_purge,[]}]},
{"4.3.1",[
{load_module,emqx_stomp_protocol,brutal_purge,soft_purge,[]},
{load_module,emqx_stomp_connection,brutal_purge,soft_purge,[]}]},
{"4.3.0",
[{restart_application,emqx_stomp}]},
{<<".*">>,[]}]}.

68
apps/emqx_stomp/src/emqx_stomp_protocol.erl
View File

@ -108,6 +108,8 @@
, init/2
]}).
-elvis([{elvis_style, dont_repeat_yourself, disable}]).
-type(pstate() :: #pstate{}).
%% @doc Init protocol
@ -132,8 +134,7 @@ init(ConnInfo = #{peername := {PeerHost, _Port},
AllowAnonymous = get_value(allow_anonymous, Opts, false),
DefaultUser = get_value(default_user, Opts),
#pstate{
#pstate{
conninfo = NConnInfo,
clientinfo = ClientInfo,
heartfun = HeartFun,
@ -165,7 +166,7 @@ default_conninfo(ConnInfo) ->
info(State) ->
maps:from_list(info(?INFO_KEYS, State)).
-spec info(list(atom())|atom(), pstate()) -> term().
-spec info(list(atom()) | atom(), pstate()) -> term().
info(Keys, State) when is_list(Keys) ->
[{Key, info(Key, State)} || Key <- Keys];
info(conninfo, #pstate{conninfo = ConnInfo}) ->
@ -288,7 +289,12 @@ received(#stomp_frame{command = <<"CONNECT">>}, State = #pstate{connected = true
received(Frame = #stomp_frame{command = <<"SEND">>, headers = Headers}, State) ->
case header(<<"transaction">>, Headers) of
undefined -> {ok, handle_recv_send_frame(Frame, State)};
TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_send_frame/2, [Frame]}, receipt_id(Headers), State)
TransactionId ->
add_action(TransactionId,
{fun ?MODULE:handle_recv_send_frame/2, [Frame]},
receipt_id(Headers),
State
)
end;
received(#stomp_frame{command = <<"SUBSCRIBE">>, headers = Headers},
@ -346,7 +352,11 @@ received(#stomp_frame{command = <<"UNSUBSCRIBE">>, headers = Headers},
received(Frame = #stomp_frame{command = <<"ACK">>, headers = Headers}, State) ->
case header(<<"transaction">>, Headers) of
undefined -> {ok, handle_recv_ack_frame(Frame, State)};
TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_ack_frame/2, [Frame]}, receipt_id(Headers), State)
TransactionId ->
add_action(TransactionId,
{fun ?MODULE:handle_recv_ack_frame/2, [Frame]},
receipt_id(Headers),
State)
end;
%% NACK
@ -357,7 +367,11 @@ received(Frame = #stomp_frame{command = <<"ACK">>, headers = Headers}, State) ->
received(Frame = #stomp_frame{command = <<"NACK">>, headers = Headers}, State) ->
case header(<<"transaction">>, Headers) of
undefined -> {ok, handle_recv_nack_frame(Frame, State)};
TransactionId -> add_action(TransactionId, {fun ?MODULE:handle_recv_nack_frame/2, [Frame]}, receipt_id(Headers), State)
TransactionId ->
add_action(TransactionId,
{fun ?MODULE:handle_recv_nack_frame/2, [Frame]},
receipt_id(Headers),
State)
end;
%% BEGIN
@ -516,9 +530,9 @@ negotiate_version(Accepts) ->
negotiate_version(Ver, []) ->
{error, <<"Supported protocol versions < ", Ver/binary>>};
negotiate_version(Ver, [AcceptVer|_]) when Ver >= AcceptVer ->
negotiate_version(Ver, [AcceptVer | _]) when Ver >= AcceptVer ->
{ok, AcceptVer};
negotiate_version(Ver, [_|T]) ->
negotiate_version(Ver, [_ | T]) ->
negotiate_version(Ver, T).
check_login(Login, _, AllowAnonymous, _)
@ -537,7 +551,7 @@ check_login(Login, Passcode, _, DefaultUser) ->
add_action(Id, Action, ReceiptId, State = #pstate{transaction = Trans}) ->
case maps:get(Id, Trans, undefined) of
{Ts, Actions} ->
NTrans = Trans#{Id => {Ts, [Action|Actions]}},
NTrans = Trans#{Id => {Ts, [Action | Actions]}},
{ok, State#pstate{transaction = NTrans}};
_ ->
send(error_frame(ReceiptId, ["Transaction ", Id, " not found"]), State)
@ -588,15 +602,29 @@ next_ackid() ->
put(ackid, AckId + 1),
AckId.
make_mqtt_message(Topic, Headers, Body) ->
Msg = emqx_message:make(stomp, Topic, Body),
Headers1 = lists:foldl(fun(Key, Headers0) ->
proplists:delete(Key, Headers0)
end, Headers, [<<"destination">>,
<<"content-length">>,
<<"content-type">>,
<<"transaction">>,
<<"receipt">>]),
make_mqtt_message(Topic, Headers, Body,
#pstate{
conninfo = #{proto_ver := ProtoVer},
clientinfo = #{
protocol := Protocol,
clientid := ClientId,
username := Username,
peerhost := PeerHost}}) ->
Msg = emqx_message:make(
ClientId, ?QOS_0,
Topic, Body, #{},
#{proto_ver => ProtoVer,
protocol => Protocol,
username => Username,
peerhost => PeerHost}),
Headers1 = lists:foldl(
fun(Key, Headers0) ->
proplists:delete(Key, Headers0)
end, Headers, [<<"destination">>,
<<"content-length">>,
<<"content-type">>,
<<"transaction">>,
<<"receipt">>]),
emqx_message:set_headers(#{stomp_headers => Headers1}, Msg).
receipt_id(Headers) ->
@ -611,7 +639,7 @@ handle_recv_send_frame(#stomp_frame{command = <<"SEND">>, headers = Headers, bod
allow ->
_ = maybe_send_receipt(receipt_id(Headers), State),
_ = emqx_broker:publish(
make_mqtt_message(Topic, Headers, iolist_to_binary(Body))
make_mqtt_message(Topic, Headers, iolist_to_binary(Body), State)
),
State;
deny ->
@ -699,7 +727,7 @@ find_sub_by_id(Id, Subs) ->
end, Subs),
case maps:to_list(Found) of
[] -> undefined;
[Sub|_] -> Sub
[Sub | _] -> Sub
end.
is_acl_enabled(_) ->