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https://github.com/processone/ejabberd.git
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Move CSI queue handling into mod_client_state
Let mod_client_state handle the queueing of stanzas, not just their classification. This simplifies the ejabberd_c2s code and gives (custom) CSI modules more flexibility.
This commit is contained in:
Holger Weiss
parent
ba2680df61
commit
ba74c1c367
@ -104,7 +104,6 @@
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ip,
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aux_fields = [],
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csi_state = active,
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csi_queue = [],
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mgmt_state,
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mgmt_xmlns,
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mgmt_queue,
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@ -1147,7 +1146,7 @@ session_established({xmlstreamelement,
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#xmlel{name = <<"active">>,
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attrs = [{<<"xmlns">>, ?NS_CLIENT_STATE}]}},
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StateData) ->
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NewStateData = csi_queue_flush(StateData),
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NewStateData = csi_flush_queue(StateData),
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fsm_next_state(session_established, NewStateData#state{csi_state = active});
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session_established({xmlstreamelement,
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#xmlel{name = <<"inactive">>,
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@ -2763,7 +2762,7 @@ handle_resume(StateData, Attrs) ->
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#xmlel{name = <<"r">>,
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attrs = [{<<"xmlns">>, AttrXmlns}],
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children = []}),
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FlushedState = csi_queue_flush(NewState),
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FlushedState = csi_flush_queue(NewState),
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NewStateData = FlushedState#state{csi_state = active},
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?INFO_MSG("Resumed session for ~s",
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[jid:to_string(NewStateData#state.jid)]),
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@ -2995,7 +2994,6 @@ inherit_session_state(#state{user = U, server = S} = StateData, ResumeID) ->
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privacy_list = OldStateData#state.privacy_list,
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aux_fields = OldStateData#state.aux_fields,
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csi_state = OldStateData#state.csi_state,
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csi_queue = OldStateData#state.csi_queue,
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mgmt_xmlns = OldStateData#state.mgmt_xmlns,
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mgmt_queue = OldStateData#state.mgmt_queue,
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mgmt_timeout = OldStateData#state.mgmt_timeout,
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@ -3028,65 +3026,25 @@ add_resent_delay_info(#state{server = From}, El, Time) ->
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%%% XEP-0352
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%%%----------------------------------------------------------------------
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csi_filter_stanza(#state{csi_state = CsiState, jid = JID} = StateData,
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csi_filter_stanza(#state{csi_state = CsiState, server = Server} = StateData,
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Stanza) ->
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Action = ejabberd_hooks:run_fold(csi_filter_stanza,
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StateData#state.server,
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send, [Stanza]),
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?DEBUG("Going to ~p stanza for inactive client ~p",
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[Action, jid:to_string(JID)]),
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case Action of
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queue -> csi_queue_add(StateData, Stanza);
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drop -> StateData;
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send ->
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From = fxml:get_tag_attr_s(<<"from">>, Stanza),
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StateData1 = csi_queue_send(StateData, From),
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StateData2 = send_stanza(StateData1#state{csi_state = active},
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Stanza),
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StateData2#state{csi_state = CsiState}
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end.
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{StateData1, Stanzas} = ejabberd_hooks:run_fold(csi_filter_stanza, Server,
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{StateData, [Stanza]},
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[Server, Stanza]),
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StateData2 = lists:foldl(fun(CurStanza, AccState) ->
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send_stanza(AccState, CurStanza)
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end, StateData1#state{csi_state = active},
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Stanzas),
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StateData2#state{csi_state = CsiState}.
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csi_queue_add(#state{csi_queue = Queue} = StateData, Stanza) ->
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case length(StateData#state.csi_queue) >= csi_max_queue(StateData) of
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true -> csi_queue_add(csi_queue_flush(StateData), Stanza);
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false ->
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From = fxml:get_tag_attr_s(<<"from">>, Stanza),
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NewQueue = lists:keystore(From, 1, Queue, {From, p1_time_compat:timestamp(), Stanza}),
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StateData#state{csi_queue = NewQueue}
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end.
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csi_queue_send(#state{csi_queue = Queue, csi_state = CsiState, server = Host} =
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StateData, From) ->
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case lists:keytake(From, 1, Queue) of
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{value, {From, Time, Stanza}, NewQueue} ->
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NewStanza = jlib:add_delay_info(Stanza, Host, Time,
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<<"Client Inactive">>),
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NewStateData = send_stanza(StateData#state{csi_state = active},
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NewStanza),
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NewStateData#state{csi_queue = NewQueue, csi_state = CsiState};
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false -> StateData
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end.
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csi_queue_flush(#state{csi_queue = Queue, csi_state = CsiState, jid = JID,
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server = Host} = StateData) ->
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?DEBUG("Flushing CSI queue for ~s", [jid:to_string(JID)]),
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NewStateData =
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lists:foldl(fun({_From, Time, Stanza}, AccState) ->
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NewStanza =
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jlib:add_delay_info(Stanza, Host, Time,
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<<"Client Inactive">>),
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send_stanza(AccState, NewStanza)
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end, StateData#state{csi_state = active}, Queue),
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NewStateData#state{csi_queue = [], csi_state = CsiState}.
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%% Make sure we won't push too many messages to the XEP-0198 queue when the
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%% client becomes 'active' again. Otherwise, the client might not manage to
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%% acknowledge the message flood in time. Also, don't let the queue grow to
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%% more than 100 stanzas.
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csi_max_queue(#state{mgmt_max_queue = infinity}) -> 100;
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csi_max_queue(#state{mgmt_max_queue = Max}) when Max > 200 -> 100;
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csi_max_queue(#state{mgmt_max_queue = Max}) when Max < 2 -> 1;
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csi_max_queue(#state{mgmt_max_queue = Max}) -> Max div 2.
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csi_flush_queue(#state{csi_state = CsiState, server = Server} = StateData) ->
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{StateData1, Stanzas} = ejabberd_hooks:run_fold(csi_flush_queue, Server,
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{StateData, []}, [Server]),
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StateData2 = lists:foldl(fun(CurStanza, AccState) ->
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send_stanza(AccState, CurStanza)
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end, StateData1#state{csi_state = active},
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Stanzas),
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StateData2#state{csi_state = CsiState}.
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%%%----------------------------------------------------------------------
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%%% JID Set memory footprint reduction code
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@ -31,13 +31,15 @@
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-behavior(gen_mod).
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-export([start/2, stop/1, add_stream_feature/2,
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filter_presence/2, filter_chat_states/2,
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filter_presence/3, filter_chat_states/3, filter_other/3, flush_queue/2,
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mod_opt_type/1]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-include("jlib.hrl").
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-define(CSI_QUEUE_MAX, 100).
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start(Host, Opts) ->
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QueuePresence = gen_mod:get_opt(queue_presence, Opts,
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fun(B) when is_boolean(B) -> B end,
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@ -57,10 +59,13 @@ start(Host, Opts) ->
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ejabberd_hooks:add(csi_filter_stanza, Host, ?MODULE,
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filter_chat_states, 50);
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true -> ok
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end;
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true -> ok
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end,
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ok.
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ejabberd_hooks:add(csi_filter_stanza, Host, ?MODULE,
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filter_other, 100),
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ejabberd_hooks:add(csi_flush_queue, Host, ?MODULE,
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flush_queue, 50);
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true -> ok
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end.
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stop(Host) ->
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QueuePresence = gen_mod:get_module_opt(Host, ?MODULE, queue_presence,
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@ -81,10 +86,13 @@ stop(Host) ->
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ejabberd_hooks:delete(csi_filter_stanza, Host, ?MODULE,
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filter_chat_states, 50);
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true -> ok
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end;
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true -> ok
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end,
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ok.
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ejabberd_hooks:delete(csi_filter_stanza, Host, ?MODULE,
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filter_other, 100),
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ejabberd_hooks:delete(csi_flush_queue, Host, ?MODULE,
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flush_queue, 50);
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true -> ok
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end.
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add_stream_feature(Features, _Host) ->
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Feature = #xmlel{name = <<"csi">>,
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@ -92,30 +100,83 @@ add_stream_feature(Features, _Host) ->
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children = []},
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[Feature | Features].
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filter_presence(_Action, #xmlel{name = <<"presence">>, attrs = Attrs}) ->
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filter_presence({C2SState, _OutStanzas} = Acc, Host,
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#xmlel{name = <<"presence">>, attrs = Attrs} = Stanza) ->
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case fxml:get_attr(<<"type">>, Attrs) of
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{value, Type} when Type /= <<"unavailable">> ->
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?DEBUG("Got important presence stanza", []),
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{stop, send};
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Acc;
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_ ->
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?DEBUG("Got availability presence stanza", []),
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{stop, queue}
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queue_add(presence, Stanza, Host, C2SState)
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end;
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filter_presence(Action, _Stanza) -> Action.
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filter_presence(Acc, _Host, _Stanza) -> Acc.
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filter_chat_states(_Action, #xmlel{name = <<"message">>} = Stanza) ->
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filter_chat_states({C2SState, _OutStanzas} = Acc, _Host,
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#xmlel{name = <<"message">>} = Stanza) ->
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case jlib:is_standalone_chat_state(Stanza) of
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true ->
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true -> % Drop the stanza.
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?DEBUG("Got standalone chat state notification", []),
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{stop, drop};
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{stop, {C2SState, []}};
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false ->
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?DEBUG("Got message stanza", []),
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{stop, send}
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Acc
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end;
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filter_chat_states(Action, _Stanza) -> Action.
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filter_chat_states(Acc, _Host, _Stanza) -> Acc.
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filter_other({C2SState, _OutStanzas}, Host, Stanza) ->
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?DEBUG("Won't add stanza to CSI queue", []),
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queue_take(Stanza, Host, C2SState).
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flush_queue({C2SState, _OutStanzas}, Host) ->
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?DEBUG("Going to flush CSI queue", []),
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Queue = get_queue(C2SState),
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NewState = set_queue([], C2SState),
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{stop, {NewState, get_stanzas(Queue, Host)}}.
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queue_add(Type, Stanza, Host, C2SState) ->
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case get_queue(C2SState) of
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Queue when length(Queue) >= ?CSI_QUEUE_MAX ->
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?DEBUG("CSI queue too large, going to flush it", []),
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NewState = set_queue([], C2SState),
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{stop, {NewState, get_stanzas(Queue, Host) ++ [Stanza]}};
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Queue ->
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?DEBUG("Adding stanza to CSI queue", []),
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From = fxml:get_tag_attr_s(<<"from">>, Stanza),
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Key = {jid:tolower(jid:from_string(From)), Type},
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Entry = {Key, p1_time_compat:timestamp(), Stanza},
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NewQueue = lists:keystore(Key, 1, Queue, Entry),
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NewState = set_queue(NewQueue, C2SState),
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{stop, {NewState, []}}
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end.
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queue_take(Stanza, Host, C2SState) ->
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From = fxml:get_tag_attr_s(<<"from">>, Stanza),
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{LUser, LServer, _LResource} = jid:tolower(jid:from_string(From)),
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{Selected, Rest} = lists:partition(
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fun({{{U, S, _R}, _Type}, _Time, _Stanza}) ->
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U == LUser andalso S == LServer
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end, get_queue(C2SState)),
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NewState = set_queue(Rest, C2SState),
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{stop, {NewState, get_stanzas(Selected, Host) ++ [Stanza]}}.
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set_queue(Queue, C2SState) ->
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ejabberd_c2s:set_aux_field(csi_queue, Queue, C2SState).
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get_queue(C2SState) ->
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case ejabberd_c2s:get_aux_field(csi_queue, C2SState) of
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{ok, Queue} ->
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Queue;
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error ->
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[]
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end.
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get_stanzas(Queue, Host) ->
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lists:map(fun({_Key, Time, Stanza}) ->
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jlib:add_delay_info(Stanza, Host, Time,
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<<"Client Inactive">>)
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end, Queue).
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mod_opt_type(drop_chat_states) ->
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fun(B) when is_boolean(B) -> B end;
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mod_opt_type(queue_presence) ->
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fun(B) when is_boolean(B) -> B end;
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mod_opt_type(_) -> [drop_chat_states, queue_presence].
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mod_opt_type(drop_chat_states) ->
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fun(B) when is_boolean(B) -> B end;
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mod_opt_type(_) -> [queue_presence, drop_chat_states].
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