mirror of
https://github.com/processone/ejabberd.git
synced 2024-12-02 16:37:52 +01:00
186 lines
5.2 KiB
Erlang
186 lines
5.2 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 31 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2019 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%-------------------------------------------------------------------
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-module(mod_proxy65_redis).
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-behaviour(mod_proxy65).
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%% API
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-export([init/0, register_stream/2, unregister_stream/1, activate_stream/4]).
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-include("logger.hrl").
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-record(proxy65, {pid_t :: pid(),
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pid_i :: pid() | undefined,
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jid_i :: binary() | undefined}).
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%%%===================================================================
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%%% API
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%%%===================================================================
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init() ->
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?DEBUG("Cleaning Redis 'proxy65' table...", []),
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NodeKey = node_key(),
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case ejabberd_redis:smembers(NodeKey) of
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{ok, SIDs} ->
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SIDKeys = [sid_key(S) || S <- SIDs],
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JIDs = lists:flatmap(
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fun(SIDKey) ->
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case ejabberd_redis:get(SIDKey) of
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{ok, Val} ->
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try binary_to_term(Val) of
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#proxy65{jid_i = J} when is_binary(J) ->
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[jid_key(J)];
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_ ->
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[]
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catch _:badarg ->
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[]
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end;
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_ ->
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[]
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end
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end, SIDKeys),
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ejabberd_redis:multi(
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fun() ->
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if SIDs /= [] ->
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ejabberd_redis:del(SIDKeys),
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if JIDs /= [] ->
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ejabberd_redis:del(JIDs);
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true ->
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ok
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end;
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true ->
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ok
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end,
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ejabberd_redis:del([NodeKey])
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end),
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ok;
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{error, _} ->
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{error, db_failure}
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end.
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register_stream(SID, Pid) ->
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SIDKey = sid_key(SID),
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try
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{ok, Val} = ejabberd_redis:get(SIDKey),
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try binary_to_term(Val) of
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#proxy65{pid_i = undefined} = R ->
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NewVal = term_to_binary(R#proxy65{pid_i = Pid}),
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ok = ejabberd_redis:set(SIDKey, NewVal);
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_ ->
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{error, conflict}
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catch _:badarg when Val == undefined ->
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NewVal = term_to_binary(#proxy65{pid_t = Pid}),
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{ok, _} = ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:set(SIDKey, NewVal),
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ejabberd_redis:sadd(node_key(), [SID])
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end),
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ok;
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_:badarg ->
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?ERROR_MSG("Malformed data in redis (key = '~s'): ~p",
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[SIDKey, Val]),
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{error, db_failure}
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end
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catch _:{badmatch, {error, _}} ->
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{error, db_failure}
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end.
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unregister_stream(SID) ->
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SIDKey = sid_key(SID),
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NodeKey = node_key(),
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try
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{ok, Val} = ejabberd_redis:get(SIDKey),
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try binary_to_term(Val) of
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#proxy65{jid_i = JID} when is_binary(JID) ->
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JIDKey = jid_key(JID),
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{ok, _} = ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:del([SIDKey]),
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ejabberd_redis:srem(JIDKey, [SID]),
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ejabberd_redis:srem(NodeKey, [SID])
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end),
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ok;
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_ ->
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{ok, _} = ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:del([SIDKey]),
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ejabberd_redis:srem(NodeKey, [SID])
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end),
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ok
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catch _:badarg when Val == undefined ->
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ok;
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_:badarg ->
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?ERROR_MSG("Malformed data in redis (key = '~s'): ~p",
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[SIDKey, Val]),
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{error, db_failure}
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end
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catch _:{badmatch, {error, _}} ->
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{error, db_failure}
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end.
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activate_stream(SID, IJID, MaxConnections, _Node) ->
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SIDKey = sid_key(SID),
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JIDKey = jid_key(IJID),
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try
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{ok, Val} = ejabberd_redis:get(SIDKey),
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try binary_to_term(Val) of
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#proxy65{pid_t = TPid, pid_i = IPid,
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jid_i = undefined} = R when is_pid(IPid) ->
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{ok, Num} = ejabberd_redis:scard(JIDKey),
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if Num >= MaxConnections ->
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{error, {limit, IPid, TPid}};
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true ->
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NewVal = term_to_binary(R#proxy65{jid_i = IJID}),
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{ok, _} = ejabberd_redis:multi(
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fun() ->
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ejabberd_redis:sadd(JIDKey, [SID]),
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ejabberd_redis:set(SIDKey, NewVal)
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end),
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{ok, IPid, TPid}
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end;
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#proxy65{jid_i = JID} when is_binary(JID) ->
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{error, conflict};
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_ ->
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{error, notfound}
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catch _:badarg when Val == undefined ->
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{error, notfound};
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_:badarg ->
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?ERROR_MSG("Malformed data in redis (key = '~s'): ~p",
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[SIDKey, Val]),
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{error, db_failure}
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end
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catch _:{badmatch, {error, _}} ->
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{error, db_failure}
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end.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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sid_key(SID) ->
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<<"ejabberd:proxy65:sid:", SID/binary>>.
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jid_key(JID) ->
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<<"ejabberd:proxy65:initiator:", JID/binary>>.
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node_key() ->
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Node = erlang:atom_to_binary(node(), latin1),
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<<"ejabberd:proxy65:node:", Node/binary>>.
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