Chapril/xmpp.chapril.org-ejabberd
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mod_caps optimizations (thanks evgeniy)

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This commit is contained in:
Christophe Romain 2010-03-05 10:34:15 +01:00
parent 31c3a78453
commit 6fb99fbb48
3 changed files with 209 additions and 415 deletions
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12
src/ejabberd_c2s.erl
View File

@ -1272,11 +1272,23 @@ handle_info({route, From, To, Packet}, StateName, StateData) ->
StateData#state.privacy_list,
{From, To, Packet},
in]) of
allow ->
case ejabberd_hooks:run_fold(
feature_check_packet, StateData#state.server,
allow,
[StateData#state.user,
StateData#state.server,
StateData#state.pres_last,
{From, To, Packet},
in]) of
allow ->
{true, Attrs, StateData};
deny ->
{false, Attrs, StateData}
end;
deny ->
{false, Attrs, StateData}
end;
_ ->
{true, Attrs, StateData}
end,

466
src/mod_caps.erl
View File

@ -33,13 +33,7 @@
-behaviour(gen_mod).
-export([read_caps/1,
get_caps/1,
note_caps/3,
wait_caps/2,
clear_caps/1,
get_features/2,
get_user_resources/2,
handle_disco_response/3]).
get_features/1]).
%% gen_mod callbacks
-export([start/2, start_link/2,
@ -55,25 +49,59 @@
]).
%% hook handlers
-export([receive_packet/3,
receive_packet/4,
presence_probe/3,
remove_connection/3]).
-export([user_send_packet/3]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-define(PROCNAME, ejabberd_mod_caps).
-define(DICT, dict).
-define(CAPS_QUERY_TIMEOUT, 60000). % 1mn without answer, consider client never answer
-record(caps, {node, version, exts}).
-record(caps_features, {node_pair, features = []}).
-record(user_caps, {jid, caps}).
-record(user_caps_resources, {uid, resource}).
-record(state, {host,
disco_requests = ?DICT:new(),
feature_queries = []}).
-record(state, {host}).
%%====================================================================
%% API
%%====================================================================
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []).
start(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
ChildSpec =
{Proc,
{?MODULE, start_link, [Host, Opts]},
transient,
1000,
worker,
[?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop(Host) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:call(Proc, stop),
supervisor:terminate_child(ejabberd_sup, Proc),
supervisor:delete_child(ejabberd_sup, Proc).
%% get_features returns a list of features implied by the given caps
%% record (as extracted by read_caps) or 'unknown' if features are
%% not completely collected at the moment.
get_features(nothing) ->
[];
get_features(#caps{node = Node, version = Version, exts = Exts}) ->
SubNodes = [Version | Exts],
lists:foldl(
fun(SubNode, Acc) ->
case mnesia:dirty_read({caps_features,
node_to_binary(Node, SubNode)}) of
[] ->
Acc;
[#caps_features{features = Features}] ->
binary_to_features(Features) ++ Acc
end
end, [], SubNodes).
%% read_caps takes a list of XML elements (the child elements of a
%% <presence/> stanza) and returns an opaque value representing the
@ -81,6 +109,7 @@
%% capabilities are advertised.
read_caps(Els) ->
read_caps(Els, nothing).
read_caps([{xmlelement, "c", Attrs, _Els} | Tail], Result) ->
case xml:get_attr_s("xmlns", Attrs) of
?NS_CAPS ->
@ -103,351 +132,110 @@ read_caps([_ | Tail], Result) ->
read_caps([], Result) ->
Result.
%% get_caps reads user caps from database
%% here we handle a simple retry loop, to avoid race condition
%% when asking caps while we still did not called note_caps
%% timeout is set to 10s
%% this is to be improved, but without altering performances.
%% if we did not get user presence 10s after getting presence_probe
%% we assume it has no caps
get_caps(LJID) ->
get_caps(LJID, 5).
get_caps(_, 0) ->
nothing;
get_caps(LJID, Retry) ->
case catch mnesia:dirty_read({user_caps, jid_to_binary(LJID)}) of
[#user_caps{caps=waiting}] ->
timer:sleep(2000),
get_caps(LJID, Retry-1);
[#user_caps{caps=Caps}] ->
Caps;
_ ->
nothing
end.
%% clear_caps removes user caps from database
clear_caps(JID) ->
{U, S, R} = jlib:jid_tolower(JID),
BJID = jid_to_binary(JID),
BUID = jid_to_binary({U, S, []}),
catch mnesia:dirty_delete({user_caps, BJID}),
catch mnesia:dirty_delete_object(#user_caps_resources{uid = BUID, resource = list_to_binary(R)}),
ok.
%% give default user resource
get_user_resources(LUser, LServer) ->
case catch mnesia:dirty_read({user_caps_resources, jid_to_binary({LUser, LServer, []})}) of
{'EXIT', _} ->
[];
Resources ->
lists:map(fun(#user_caps_resources{resource=R}) -> binary_to_list(R) end, Resources)
end.
%% note_caps should be called to make the module request disco
%% information. Host is the host that asks, From is the full JID that
%% sent the caps packet, and Caps is what read_caps returned.
note_caps(Host, From, Caps) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:cast(Proc, {note_caps, From, Caps}).
%% wait_caps should be called just before note_caps
%% it allows to lock get_caps usage for code using presence_probe
%% that may run before we get any chance to note_caps.
wait_caps(Host, From) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:cast(Proc, {wait_caps, From}).
%% get_features returns a list of features implied by the given caps
%% record (as extracted by read_caps). It may block, and may signal a
%% timeout error.
get_features(Host, Caps) ->
case Caps of
%%====================================================================
%% Hooks
%%====================================================================
user_send_packet(#jid{luser = User, lserver = Server} = From,
#jid{luser = User, lserver = Server, lresource = ""},
{xmlelement, "presence", Attrs, Els}) ->
Type = xml:get_attr_s("type", Attrs),
if Type == ""; Type == "available" ->
case read_caps(Els) of
nothing ->
[];
#caps{} ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:call(Proc, {get_features, Caps})
end.
start_link(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:start_link({local, Proc}, ?MODULE, [Host, Opts], []).
start(Host, Opts) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
ChildSpec =
{Proc,
{?MODULE, start_link, [Host, Opts]},
transient,
1000,
worker,
[?MODULE]},
supervisor:start_child(ejabberd_sup, ChildSpec).
stop(Host) ->
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:call(Proc, stop).
receive_packet(From, To, {xmlelement, "presence", Attrs, Els}) ->
case xml:get_attr_s("type", Attrs) of
"probe" ->
ok;
"error" ->
ok;
"invisible" ->
ok;
"subscribe" ->
ok;
"subscribed" ->
ok;
"unsubscribe" ->
ok;
"unsubscribed" ->
ok;
"unavailable" ->
{_, S1, _} = jlib:jid_tolower(From),
case jlib:jid_tolower(To) of
{_, S1, _} -> ok;
_ -> clear_caps(From)
#caps{version = Version, exts = Exts} = Caps ->
feature_request(Server, From, Caps, [Version | Exts])
end;
%% TODO: probe client, and clean only if no answers
%% as far as protocol does not allow inter-server communication to
%% let remote server handle it's own caps to decide which user is to be
%% notified, we must keep a cache of online status of external contacts
%% this is absolutely not scallable, but we have no choice for now
%% we can only use unavailable presence, but if remote user just remove a local user
%% from its roster, then it's considered as offline, so he does not receive local PEP
%% anymore until he login again.
%% This is tracked in EJAB-943
_ ->
note_caps(To#jid.lserver, From, read_caps(Els))
true ->
ok
end;
receive_packet(_, _, _) ->
user_send_packet(_From, _To, _Packet) ->
ok.
receive_packet(_JID, From, To, Packet) ->
receive_packet(From, To, Packet).
presence_probe(From, To, _) ->
wait_caps(To#jid.lserver, From).
remove_connection(_SID, JID, _Info) ->
clear_caps(JID).
jid_to_binary(JID) ->
{U, S, R} = jlib:jid_tolower(JID),
list_to_binary(jlib:jid_to_string({U, S, R})).
caps_to_binary(#caps{node = Node, version = Version, exts = Exts}) ->
BExts = [list_to_binary(Ext) || Ext <- Exts],
#caps{node = list_to_binary(Node), version = list_to_binary(Version), exts = BExts}.
node_to_binary(Node, SubNode) ->
{list_to_binary(Node), list_to_binary(SubNode)}.
features_to_binary(L) -> [list_to_binary(I) || I <- L].
binary_to_features(L) -> [binary_to_list(I) || I <- L].
%%====================================================================
%% gen_server callbacks
%%====================================================================
init([Host, _Opts]) ->
mnesia:create_table(caps_features,
[{disc_copies, [node()]},
{local_content, true},
{attributes, record_info(fields, caps_features)}]),
mnesia:create_table(user_caps,
[{ram_copies, [node()]},
{attributes, record_info(fields, user_caps)}]),
mnesia:create_table(user_caps_resources,
[{ram_copies, [node()]},
{type, bag},
{attributes, record_info(fields, user_caps_resources)}]),
mnesia:delete_table(user_caps_default),
mnesia:clear_table(user_caps), % clean in case of explicitely set to disc_copies
mnesia:clear_table(user_caps_resources), % clean in case of explicitely set to disc_copies
ejabberd_hooks:add(user_receive_packet, Host, ?MODULE, receive_packet, 30),
ejabberd_hooks:add(s2s_receive_packet, Host, ?MODULE, receive_packet, 30),
ejabberd_hooks:add(presence_probe_hook, Host, ?MODULE, presence_probe, 20),
ejabberd_hooks:add(sm_remove_connection_hook, Host, ?MODULE, remove_connection, 20),
mnesia:add_table_copy(caps_features, node(), disc_copies),
ejabberd_hooks:add(user_send_packet, Host,
?MODULE, user_send_packet, 75),
{ok, #state{host = Host}}.
maybe_get_features(#caps{node = Node, version = Version, exts = Exts}) ->
SubNodes = [Version | Exts],
%% Make sure that we have all nodes we need to know.
%% If a single one is missing, we wait for more disco
%% responses.
case lists:foldl(fun(SubNode, Acc) ->
case Acc of
fail -> fail;
_ ->
case mnesia:dirty_read({caps_features, {Node, SubNode}}) of
[] -> fail;
[#caps_features{features = Features}] -> Features ++ Acc %% TODO binary
end
end
end, [], SubNodes) of
fail -> wait;
Features -> {ok, Features}
end.
timestamp() ->
{MegaSecs, Secs, _MicroSecs} = now(),
MegaSecs * 1000000 + Secs.
handle_call({get_features, Caps}, From, State) ->
case maybe_get_features(Caps) of
{ok, Features} ->
{reply, binary_to_features(Features), State};
wait ->
gen_server:cast(self(), visit_feature_queries),
Timeout = timestamp() + 10,
FeatureQueries = State#state.feature_queries,
NewFeatureQueries = [{From, Caps, Timeout} | FeatureQueries],
NewState = State#state{feature_queries = NewFeatureQueries},
{noreply, NewState}
end;
handle_call(stop, _From, State) ->
{stop, normal, ok, State}.
{stop, normal, ok, State};
handle_call(_Req, _From, State) ->
{reply, {error, badarg}, State}.
handle_cast({note_caps, From, nothing}, State) ->
BJID = jid_to_binary(From),
catch mnesia:dirty_delete({user_caps, BJID}),
{noreply, State};
handle_cast({note_caps, From,
#caps{node = Node, version = Version, exts = Exts} = Caps},
#state{host = Host, disco_requests = Requests} = State) ->
%% XXX: this leads to race conditions where ejabberd will send
%% lots of caps disco requests.
{U, S, R} = jlib:jid_tolower(From),
BJID = jid_to_binary(From),
mnesia:transaction(fun() ->
mnesia:write(#user_caps{jid = BJID, caps = caps_to_binary(Caps)}),
case ejabberd_sm:get_user_resources(U, S) of
[] ->
% only store resources of caps aware external contacts
BUID = jid_to_binary({U, S, []}),
mnesia:write(#user_caps_resources{uid = BUID, resource = list_to_binary(R)});
_ ->
ok
end
end),
%% Now, find which of these are not already in the database.
SubNodes = [Version | Exts],
case lists:foldl(fun(SubNode, Acc) ->
case mnesia:dirty_read({caps_features, node_to_binary(Node, SubNode)}) of
[] ->
[SubNode | Acc];
_ ->
Acc
end
end, [], SubNodes) of
[] ->
{noreply, State};
Missing ->
%% For each unknown caps "subnode", we send a disco request.
NewRequests = lists:foldl(
fun(SubNode, Dict) ->
ID = randoms:get_string(),
Stanza =
{xmlelement, "iq",
[{"type", "get"},
{"id", ID}],
[{xmlelement, "query",
[{"xmlns", ?NS_DISCO_INFO},
{"node", lists:concat([Node, "#", SubNode])}],
[]}]},
ejabberd_local:register_iq_response_handler
(Host, ID, ?MODULE, handle_disco_response),
ejabberd_router:route(jlib:make_jid("", Host, ""), From, Stanza),
timer:send_after(?CAPS_QUERY_TIMEOUT, self(), {disco_timeout, ID, BJID}),
?DICT:store(ID, node_to_binary(Node, SubNode), Dict)
end, Requests, Missing),
{noreply, State#state{disco_requests = NewRequests}}
end;
handle_cast({wait_caps, From}, State) ->
BJID = jid_to_binary(From),
mnesia:dirty_write(#user_caps{jid = BJID, caps = waiting}),
{noreply, State};
handle_cast({disco_response, From, _To,
#iq{type = Type, id = ID,
sub_el = SubEls}},
#state{disco_requests = Requests} = State) ->
case {Type, SubEls} of
{result, [{xmlelement, "query", _Attrs, Els}]} ->
case ?DICT:find(ID, Requests) of
{ok, BinaryNode} ->
Features =
lists:flatmap(fun({xmlelement, "feature", FAttrs, _}) ->
[xml:get_attr_s("var", FAttrs)];
(_) ->
[]
end, Els),
mnesia:dirty_write(#caps_features{node_pair = BinaryNode, features = features_to_binary(Features)}),
gen_server:cast(self(), visit_feature_queries);
error ->
?DEBUG("ID '~s' matches no query", [ID])
end;
{error, _} ->
%% XXX: if we get error, we cache empty feature not to probe the client continuously
case ?DICT:find(ID, Requests) of
{ok, BinaryNode} ->
mnesia:dirty_write(#caps_features{node_pair = BinaryNode}),
gen_server:cast(self(), visit_feature_queries);
error ->
?DEBUG("ID '~s' matches no query", [ID])
end;
%gen_server:cast(self(), visit_feature_queries),
%?DEBUG("Error IQ reponse from ~s:~n~p", [jlib:jid_to_string(From), SubEls]);
{result, _} ->
?DEBUG("Invalid IQ contents from ~s:~n~p", [jlib:jid_to_string(From), SubEls]);
_ ->
%% Can't do anything about errors
ok
end,
NewRequests = ?DICT:erase(ID, Requests),
{noreply, State#state{disco_requests = NewRequests}};
handle_cast({disco_timeout, ID, BJID}, #state{host = Host, disco_requests = Requests} = State) ->
%% do not wait a response anymore for this IQ, client certainly will never answer
NewRequests = case ?DICT:is_key(ID, Requests) of
true ->
catch mnesia:dirty_delete({user_caps, BJID}),
ejabberd_local:unregister_iq_response_handler(Host, ID),
?DICT:erase(ID, Requests);
false ->
Requests
end,
{noreply, State#state{disco_requests = NewRequests}};
handle_cast(visit_feature_queries, #state{feature_queries = FeatureQueries} = State) ->
Timestamp = timestamp(),
NewFeatureQueries =
lists:foldl(fun({From, Caps, Timeout}, Acc) ->
case maybe_get_features(Caps) of
wait when Timeout > Timestamp -> [{From, Caps, Timeout} | Acc];
wait -> Acc;
{ok, Features} ->
gen_server:reply(From, Features),
Acc
end
end, [], FeatureQueries),
{noreply, State#state{feature_queries = NewFeatureQueries}}.
handle_disco_response(From, To, IQ) ->
#jid{lserver = Host} = To,
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
gen_server:cast(Proc, {disco_response, From, To, IQ}).
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info(_Info, State) ->
{noreply, State}.
terminate(_Reason, State) ->
Host = State#state.host,
ejabberd_hooks:delete(user_receive_packet, Host, ?MODULE, receive_packet, 30),
ejabberd_hooks:delete(s2s_receive_packet, Host, ?MODULE, receive_packet, 30),
ejabberd_hooks:delete(presence_probe_hook, Host, ?MODULE, presence_probe, 20),
ejabberd_hooks:delete(sm_remove_connection_hook, Host, ?MODULE, remove_connection, 20),
ejabberd_hooks:delete(user_send_packet, Host,
?MODULE, user_send_packet, 75),
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
%%====================================================================
%% Aux functions
%%====================================================================
feature_request(Host, From, Caps, [SubNode | Tail] = SubNodes) ->
Node = Caps#caps.node,
BinaryNode = node_to_binary(Node, SubNode),
case mnesia:dirty_read({caps_features, BinaryNode}) of
[] ->
IQ = #iq{type = get,
xmlns = ?NS_DISCO_INFO,
sub_el = [{xmlelement, "query",
[{"xmlns", ?NS_DISCO_INFO},
{"node", Node ++ "#" ++ SubNode}],
[]}]},
F = fun(IQReply) ->
feature_response(
IQReply, Host, From, Caps, SubNodes)
end,
ejabberd_local:route_iq(
jlib:make_jid("", Host, ""), From, IQ, F);
_ ->
feature_request(Host, From, Caps, Tail)
end;
feature_request(_Host, _From, _Caps, []) ->
ok.
feature_response(#iq{type = result,
sub_el = [{xmlelement, _, _, Els}]},
Host, From, Caps, [SubNode | SubNodes]) ->
Features = lists:flatmap(
fun({xmlelement, "feature", FAttrs, _}) ->
[xml:get_attr_s("var", FAttrs)];
(_) ->
[]
end, Els),
BinaryNode = node_to_binary(Caps#caps.node, SubNode),
mnesia:dirty_write(
#caps_features{node_pair = BinaryNode,
features = features_to_binary(Features)}),
feature_request(Host, From, Caps, SubNodes);
feature_response(timeout, _Host, _From, _Caps, _SubNodes) ->
ok;
feature_response(_IQResult, Host, From, Caps, [SubNode | SubNodes]) ->
%% We got type=error or invalid type=result stanza, so
%% we cache empty feature not to probe the client permanently
BinaryNode = node_to_binary(Caps#caps.node, SubNode),
mnesia:dirty_write(#caps_features{node_pair = BinaryNode}),
feature_request(Host, From, Caps, SubNodes).
node_to_binary(Node, SubNode) ->
{list_to_binary(Node), list_to_binary(SubNode)}.
features_to_binary(L) -> [list_to_binary(I) || I <- L].
binary_to_features(L) -> [binary_to_list(I) || I <- L].

96
src/mod_pubsub/mod_pubsub.erl
View File

@ -63,6 +63,7 @@
in_subscription/6,
out_subscription/4,
remove_user/2,
feature_check_packet/6,
disco_local_identity/5,
disco_local_features/5,
disco_local_items/5,
@ -208,6 +209,7 @@ init([ServerHost, Opts]) ->
gen_iq_handler:add_iq_handler(ejabberd_sm, ServerHost, ?NS_PUBSUB_OWNER, ?MODULE, iq_sm, IQDisc),
case lists:member(?PEPNODE, Plugins) of
true ->
ejabberd_hooks:add(feature_check_packet, ServerHost, ?MODULE, feature_check_packet, 75),
ejabberd_hooks:add(disco_local_identity, ServerHost, ?MODULE, disco_local_identity, 75),
ejabberd_hooks:add(disco_local_features, ServerHost, ?MODULE, disco_local_features, 75),
ejabberd_hooks:add(disco_local_items, ServerHost, ?MODULE, disco_local_items, 75),
@ -514,18 +516,13 @@ send_loop(State) ->
%% this makes that hack only work for local domain by now
if not State#state.ignore_pep_from_offline ->
{User, Server, Resource} = jlib:jid_tolower(JID),
case mod_caps:get_caps({User, Server, Resource}) of
nothing ->
%% we don't have caps, no need to handle PEP items
ok;
_ ->
case catch ejabberd_c2s:get_subscribed(Pid) of
Contacts when is_list(Contacts) ->
lists:foreach(
fun({U, S, R}) ->
case S of
ServerHost -> %% local contacts
case ejabberd_sm:get_user_resources(U, S) of
case user_resources(U, S) of
[] -> %% offline
PeerJID = jlib:make_jid(U, S, R),
self() ! {presence, User, Server, [Resource], PeerJID};
@ -540,7 +537,6 @@ send_loop(State) ->
end, Contacts);
_ ->
ok
end
end;
true ->
ok
@ -549,27 +545,14 @@ send_loop(State) ->
{presence, User, Server, Resources, JID} ->
%% get resources caps and check if processing is needed
spawn(fun() ->
{HasCaps, ResourcesCaps} = lists:foldl(fun(Resource, {R, L}) ->
case mod_caps:get_caps({User, Server, Resource}) of
nothing -> {R, L};
Caps -> {true, [{Resource, Caps} | L]}
end
end, {false, []}, Resources),
case HasCaps of
true ->
Host = State#state.host,
ServerHost = State#state.server_host,
Owner = jlib:jid_remove_resource(jlib:jid_tolower(JID)),
lists:foreach(fun(#pubsub_node{nodeid = {_, Node}, type = Type, id = NodeId, options = Options}) ->
case get_option(Options, send_last_published_item) of
on_sub_and_presence ->
lists:foreach(fun({Resource, Caps}) ->
CapsNotify = case catch mod_caps:get_features(ServerHost, Caps) of
Features when is_list(Features) -> lists:member(node_to_string(Node) ++ "+notify", Features);
_ -> false
end,
case CapsNotify of
true ->
lists:foreach(
fun(Resource) ->
LJID = {User, Server, Resource},
Subscribed = case get_option(Options, access_model) of
open -> true;
@ -585,18 +568,12 @@ send_loop(State) ->
send_items(Owner, Node, NodeId, Type, LJID, last);
true ->
ok
end;
false ->
ok
end
end, ResourcesCaps);
end, Resources);
_ ->
ok
end
end, tree_action(Host, get_nodes, [Owner, JID]));
false ->
ok
end
end, tree_action(Host, get_nodes, [Owner, JID]))
end),
send_loop(State);
stop ->
@ -878,6 +855,7 @@ terminate(_Reason, #state{host = Host,
ejabberd_router:unregister_route(Host),
case lists:member(?PEPNODE, Plugins) of
true ->
ejabberd_hooks:delete(feature_check_packet, ServerHost, ?MODULE, feature_check_packet, 75),
ejabberd_hooks:delete(disco_local_identity, ServerHost, ?MODULE, disco_local_identity, 75),
ejabberd_hooks:delete(disco_local_features, ServerHost, ?MODULE, disco_local_features, 75),
ejabberd_hooks:delete(disco_local_items, ServerHost, ?MODULE, disco_local_items, 75),
@ -3118,10 +3096,7 @@ broadcast_stanza(Host, Node, _NodeId, _Type, NodeOptions, SubsByDepth, NotifyTyp
spawn(fun() ->
LJIDs = lists:foldl(fun(R, Acc) ->
LJID = {U, S, R},
case is_caps_notify(LServer, Node, LJID) of
true -> [LJID | Acc];
false -> Acc
end
[LJID | Acc]
end, [], user_resources(U, S)),
lists:foreach(fun(To) ->
ejabberd_router:route(Sender, jlib:make_jid(To), Stanza)
@ -3186,24 +3161,8 @@ subscribed_nodes_by_jid(NotifyType, SubsByDepth) ->
{_, JIDSubs} = lists:foldl(DepthsToDeliver, {[], []}, SubsByDepth),
JIDSubs.
%% If we don't know the resource, just pick first if any
%% If no resource available, check if caps anyway (remote online)
user_resources(User, Server) ->
case ejabberd_sm:get_user_resources(User, Server) of
[] -> mod_caps:get_user_resources(User, Server);
Rs -> Rs
end.
is_caps_notify(Host, Node, LJID) ->
case mod_caps:get_caps(LJID) of
nothing ->
false;
Caps ->
case catch mod_caps:get_features(Host, Caps) of
Features when is_list(Features) -> lists:member(node_to_string(Node) ++ "+notify", Features);
_ -> false
end
end.
ejabberd_sm:get_user_resources(User, Server).
%%%%%%% Configuration handling
@ -3785,3 +3744,38 @@ subid_shim(SubIDs) ->
[{xmlelement, "header", [{"name", "SubID"}],
[{xmlcdata, SubID}]} || SubID <- SubIDs].
feature_check_packet(allow, _User, Server, Pres, {#jid{lserver = LServer}, _To, {xmlelement, "message", _, _} = El}, in) ->
Host = host(Server),
case LServer of
%% If the sender Server equals Host, the message comes from the Pubsub server
Host ->
allow;
%% Else, the message comes from PEP
_ ->
case xml:get_subtag(El, "event") of
{xmlelement, _, Attrs, _} = EventEl ->
case xml:get_attr_s("xmlns", Attrs) of
?NS_PUBSUB_EVENT ->
Feature = xml:get_path_s(EventEl, [{elem, "items"}, {attr, "node"}]),
case is_feature_supported(Pres, Feature) of
true ->
allow;
false ->
deny
end;
_ ->
allow
end;
_ ->
allow
end
end;
feature_check_packet(Acc, _User, _Server, _Pres, _Packet, _Direction) ->
Acc.
is_feature_supported({xmlelement, "presence", _, Els}, Feature) ->
case mod_caps:read_caps(Els) of
nothing -> false;
Caps -> lists:member(Feature ++ "+notify", mod_caps:get_features(Caps))
end.