mirror of
https://github.com/processone/ejabberd.git
synced 2024-12-04 16:40:36 +01:00
9f5246cacc
SVN Revision: 2896
666 lines
20 KiB
Erlang
666 lines
20 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_offline.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Store and manage offline messages in Mnesia database.
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%%% Created : 5 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2010 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
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_offline).
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-author('alexey@process-one.net').
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-behaviour(gen_mod).
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-export([start/2,
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loop/1,
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stop/1,
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store_packet/3,
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resend_offline_messages/2,
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pop_offline_messages/3,
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get_sm_features/5,
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remove_expired_messages/0,
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remove_old_messages/1,
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remove_user/2,
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get_queue_length/2,
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webadmin_page/3,
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webadmin_user/4,
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webadmin_user_parse_query/5]).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-include("web/ejabberd_http.hrl").
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-include("web/ejabberd_web_admin.hrl").
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-record(offline_msg, {us, timestamp, expire, from, to, packet}).
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-define(PROCNAME, ejabberd_offline).
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-define(OFFLINE_TABLE_LOCK_THRESHOLD, 1000).
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%% default value for the maximum number of user messages
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-define(MAX_USER_MESSAGES, infinity).
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start(Host, Opts) ->
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mnesia:create_table(offline_msg,
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[{disc_only_copies, [node()]},
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{type, bag},
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{attributes, record_info(fields, offline_msg)}]),
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update_table(),
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ejabberd_hooks:add(offline_message_hook, Host,
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?MODULE, store_packet, 50),
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ejabberd_hooks:add(resend_offline_messages_hook, Host,
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?MODULE, pop_offline_messages, 50),
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ejabberd_hooks:add(remove_user, Host,
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?MODULE, remove_user, 50),
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ejabberd_hooks:add(anonymous_purge_hook, Host,
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?MODULE, remove_user, 50),
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ejabberd_hooks:add(disco_sm_features, Host,
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?MODULE, get_sm_features, 50),
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ejabberd_hooks:add(disco_local_features, Host,
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?MODULE, get_sm_features, 50),
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ejabberd_hooks:add(webadmin_page_host, Host,
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?MODULE, webadmin_page, 50),
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ejabberd_hooks:add(webadmin_user, Host,
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?MODULE, webadmin_user, 50),
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ejabberd_hooks:add(webadmin_user_parse_query, Host,
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?MODULE, webadmin_user_parse_query, 50),
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AccessMaxOfflineMsgs = gen_mod:get_opt(access_max_user_messages, Opts, max_user_offline_messages),
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register(gen_mod:get_module_proc(Host, ?PROCNAME),
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spawn(?MODULE, loop, [AccessMaxOfflineMsgs])).
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loop(AccessMaxOfflineMsgs) ->
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receive
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#offline_msg{us=US} = Msg ->
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Msgs = receive_all(US, [Msg]),
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Len = length(Msgs),
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{User, Host} = US,
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MaxOfflineMsgs = get_max_user_messages(AccessMaxOfflineMsgs,
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User, Host),
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F = fun() ->
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%% Only count messages if needed:
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Count = if MaxOfflineMsgs =/= infinity ->
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Len + p1_mnesia:count_records(
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offline_msg,
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#offline_msg{us=US, _='_'});
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true ->
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0
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end,
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if
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Count > MaxOfflineMsgs ->
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discard_warn_sender(Msgs);
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true ->
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if
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Len >= ?OFFLINE_TABLE_LOCK_THRESHOLD ->
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mnesia:write_lock_table(offline_msg);
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true ->
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ok
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end,
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lists:foreach(fun(M) ->
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mnesia:write(M)
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end, Msgs)
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end
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end,
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mnesia:transaction(F),
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loop(AccessMaxOfflineMsgs);
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_ ->
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loop(AccessMaxOfflineMsgs)
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end.
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%% Function copied from ejabberd_sm.erl:
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get_max_user_messages(AccessRule, LUser, Host) ->
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case acl:match_rule(
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Host, AccessRule, jlib:make_jid(LUser, Host, "")) of
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Max when is_integer(Max) -> Max;
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infinity -> infinity;
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_ -> ?MAX_USER_MESSAGES
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end.
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receive_all(US, Msgs) ->
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receive
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#offline_msg{us=US} = Msg ->
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receive_all(US, [Msg | Msgs])
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after 0 ->
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Msgs
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end.
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stop(Host) ->
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ejabberd_hooks:delete(offline_message_hook, Host,
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?MODULE, store_packet, 50),
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ejabberd_hooks:delete(resend_offline_messages_hook, Host,
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?MODULE, pop_offline_messages, 50),
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ejabberd_hooks:delete(remove_user, Host,
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?MODULE, remove_user, 50),
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ejabberd_hooks:delete(anonymous_purge_hook, Host,
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?MODULE, remove_user, 50),
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ejabberd_hooks:delete(disco_sm_features, Host, ?MODULE, get_sm_features, 50),
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ejabberd_hooks:delete(disco_local_features, Host, ?MODULE, get_sm_features, 50),
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ejabberd_hooks:delete(webadmin_page_host, Host,
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?MODULE, webadmin_page, 50),
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ejabberd_hooks:delete(webadmin_user, Host,
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?MODULE, webadmin_user, 50),
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ejabberd_hooks:delete(webadmin_user_parse_query, Host,
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?MODULE, webadmin_user_parse_query, 50),
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Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
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exit(whereis(Proc), stop),
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{wait, Proc}.
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get_sm_features(Acc, _From, _To, "", _Lang) ->
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Feats = case Acc of
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{result, I} -> I;
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_ -> []
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end,
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{result, Feats ++ [?NS_FEATURE_MSGOFFLINE]};
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get_sm_features(_Acc, _From, _To, ?NS_FEATURE_MSGOFFLINE, _Lang) ->
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%% override all lesser features...
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{result, []};
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get_sm_features(Acc, _From, _To, _Node, _Lang) ->
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Acc.
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store_packet(From, To, Packet) ->
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Type = xml:get_tag_attr_s("type", Packet),
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if
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(Type /= "error") and (Type /= "groupchat") and
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(Type /= "headline") ->
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case check_event_chatstates(From, To, Packet) of
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true ->
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#jid{luser = LUser, lserver = LServer} = To,
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TimeStamp = now(),
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{xmlelement, _Name, _Attrs, Els} = Packet,
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Expire = find_x_expire(TimeStamp, Els),
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gen_mod:get_module_proc(To#jid.lserver, ?PROCNAME) !
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#offline_msg{us = {LUser, LServer},
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timestamp = TimeStamp,
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expire = Expire,
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from = From,
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to = To,
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packet = Packet},
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stop;
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_ ->
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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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%% Check if the packet has any content about XEP-0022 or XEP-0085
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check_event_chatstates(From, To, Packet) ->
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{xmlelement, Name, Attrs, Els} = Packet,
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case find_x_event_chatstates(Els, {false, false, false}) of
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%% There wasn't any x:event or chatstates subelements
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{false, false, _} ->
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true;
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%% There a chatstates subelement and other stuff, but no x:event
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{false, CEl, true} when CEl /= false ->
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true;
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%% There was only a subelement: a chatstates
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{false, CEl, false} when CEl /= false ->
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%% Don't allow offline storage
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false;
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%% There was an x:event element, and maybe also other stuff
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{El, _, _} when El /= false ->
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case xml:get_subtag(El, "id") of
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false ->
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case xml:get_subtag(El, "offline") of
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false ->
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true;
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_ ->
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ID = case xml:get_tag_attr_s("id", Packet) of
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"" ->
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{xmlelement, "id", [], []};
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S ->
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{xmlelement, "id", [],
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[{xmlcdata, S}]}
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end,
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ejabberd_router:route(
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To, From, {xmlelement, Name, Attrs,
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[{xmlelement, "x",
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[{"xmlns", ?NS_EVENT}],
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[ID,
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{xmlelement, "offline", [], []}]}]
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}),
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true
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end;
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_ ->
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false
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end
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end.
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%% Check if the packet has subelements about XEP-0022, XEP-0085 or other
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find_x_event_chatstates([], Res) ->
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Res;
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find_x_event_chatstates([{xmlcdata, _} | Els], Res) ->
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find_x_event_chatstates(Els, Res);
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find_x_event_chatstates([El | Els], {A, B, C}) ->
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case xml:get_tag_attr_s("xmlns", El) of
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?NS_EVENT ->
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find_x_event_chatstates(Els, {El, B, C});
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?NS_CHATSTATES ->
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find_x_event_chatstates(Els, {A, El, C});
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_ ->
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find_x_event_chatstates(Els, {A, B, true})
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end.
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find_x_expire(_, []) ->
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never;
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find_x_expire(TimeStamp, [{xmlcdata, _} | Els]) ->
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find_x_expire(TimeStamp, Els);
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find_x_expire(TimeStamp, [El | Els]) ->
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case xml:get_tag_attr_s("xmlns", El) of
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?NS_EXPIRE ->
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Val = xml:get_tag_attr_s("seconds", El),
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case catch list_to_integer(Val) of
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{'EXIT', _} ->
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never;
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Int when Int > 0 ->
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{MegaSecs, Secs, MicroSecs} = TimeStamp,
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S = MegaSecs * 1000000 + Secs + Int,
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MegaSecs1 = S div 1000000,
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Secs1 = S rem 1000000,
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{MegaSecs1, Secs1, MicroSecs};
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_ ->
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never
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end;
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_ ->
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find_x_expire(TimeStamp, Els)
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end.
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resend_offline_messages(User, Server) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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US = {LUser, LServer},
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F = fun() ->
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Rs = mnesia:wread({offline_msg, US}),
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mnesia:delete({offline_msg, US}),
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Rs
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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lists:foreach(
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fun(R) ->
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{xmlelement, Name, Attrs, Els} = R#offline_msg.packet,
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ejabberd_sm !
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{route,
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R#offline_msg.from,
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R#offline_msg.to,
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{xmlelement, Name, Attrs,
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Els ++
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[jlib:timestamp_to_xml(
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calendar:now_to_universal_time(
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R#offline_msg.timestamp),
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utc,
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jlib:make_jid("", Server, ""),
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"Offline Storage"),
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%% TODO: Delete the next three lines once XEP-0091 is Obsolete
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jlib:timestamp_to_xml(
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calendar:now_to_universal_time(
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R#offline_msg.timestamp))]}}
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end,
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lists:keysort(#offline_msg.timestamp, Rs));
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_ ->
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ok
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end.
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pop_offline_messages(Ls, User, Server) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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US = {LUser, LServer},
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F = fun() ->
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Rs = mnesia:wread({offline_msg, US}),
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mnesia:delete({offline_msg, US}),
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Rs
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end,
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case mnesia:transaction(F) of
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{atomic, Rs} ->
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TS = now(),
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Ls ++ lists:map(
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fun(R) ->
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{xmlelement, Name, Attrs, Els} = R#offline_msg.packet,
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{route,
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R#offline_msg.from,
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R#offline_msg.to,
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{xmlelement, Name, Attrs,
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Els ++
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[jlib:timestamp_to_xml(
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calendar:now_to_universal_time(
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R#offline_msg.timestamp),
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utc,
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jlib:make_jid("", Server, ""),
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"Offline Storage"),
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%% TODO: Delete the next three lines once XEP-0091 is Obsolete
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jlib:timestamp_to_xml(
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calendar:now_to_universal_time(
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R#offline_msg.timestamp))]}}
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end,
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lists:filter(
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fun(R) ->
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case R#offline_msg.expire of
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never ->
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true;
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TimeStamp ->
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TS < TimeStamp
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end
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end,
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lists:keysort(#offline_msg.timestamp, Rs)));
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_ ->
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Ls
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end.
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remove_expired_messages() ->
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TimeStamp = now(),
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F = fun() ->
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mnesia:write_lock_table(offline_msg),
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mnesia:foldl(
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fun(Rec, _Acc) ->
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case Rec#offline_msg.expire of
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never ->
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ok;
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TS ->
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if
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TS < TimeStamp ->
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mnesia:delete_object(Rec);
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true ->
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ok
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end
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end
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end, ok, offline_msg)
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end,
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mnesia:transaction(F).
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remove_old_messages(Days) ->
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{MegaSecs, Secs, _MicroSecs} = now(),
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S = MegaSecs * 1000000 + Secs - 60 * 60 * 24 * Days,
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MegaSecs1 = S div 1000000,
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Secs1 = S rem 1000000,
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TimeStamp = {MegaSecs1, Secs1, 0},
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F = fun() ->
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mnesia:write_lock_table(offline_msg),
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mnesia:foldl(
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fun(#offline_msg{timestamp = TS} = Rec, _Acc)
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when TS < TimeStamp ->
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mnesia:delete_object(Rec);
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(_Rec, _Acc) -> ok
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end, ok, offline_msg)
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end,
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mnesia:transaction(F).
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remove_user(User, Server) ->
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LUser = jlib:nodeprep(User),
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LServer = jlib:nameprep(Server),
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US = {LUser, LServer},
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F = fun() ->
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mnesia:delete({offline_msg, US})
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end,
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mnesia:transaction(F).
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update_table() ->
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Fields = record_info(fields, offline_msg),
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case mnesia:table_info(offline_msg, attributes) of
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Fields ->
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ok;
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[user, timestamp, expire, from, to, packet] ->
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?INFO_MSG("Converting offline_msg table from "
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"{user, timestamp, expire, from, to, packet} format", []),
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Host = ?MYNAME,
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{atomic, ok} = mnesia:create_table(
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mod_offline_tmp_table,
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[{disc_only_copies, [node()]},
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{type, bag},
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{local_content, true},
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{record_name, offline_msg},
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{attributes, record_info(fields, offline_msg)}]),
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mnesia:transform_table(offline_msg, ignore, Fields),
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F1 = fun() ->
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mnesia:write_lock_table(mod_offline_tmp_table),
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mnesia:foldl(
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fun(#offline_msg{us = U} = R, _) ->
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mnesia:dirty_write(
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mod_offline_tmp_table,
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R#offline_msg{us = {U, Host}})
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end, ok, offline_msg)
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end,
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mnesia:transaction(F1),
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mnesia:clear_table(offline_msg),
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F2 = fun() ->
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mnesia:write_lock_table(offline_msg),
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mnesia:foldl(
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fun(R, _) ->
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mnesia:dirty_write(R)
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end, ok, mod_offline_tmp_table)
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end,
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mnesia:transaction(F2),
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mnesia:delete_table(mod_offline_tmp_table);
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[user, timestamp, from, to, packet] ->
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?INFO_MSG("Converting offline_msg table from "
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"{user, timestamp, from, to, packet} format", []),
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Host = ?MYNAME,
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{atomic, ok} = mnesia:create_table(
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mod_offline_tmp_table,
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[{disc_only_copies, [node()]},
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{type, bag},
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{local_content, true},
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{record_name, offline_msg},
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{attributes, record_info(fields, offline_msg)}]),
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mnesia:transform_table(
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offline_msg,
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fun({_, U, TS, F, T, P}) ->
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{xmlelement, _Name, _Attrs, Els} = P,
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Expire = find_x_expire(TS, Els),
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#offline_msg{us = U,
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timestamp = TS,
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expire = Expire,
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from = F,
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to = T,
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packet = P}
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end, Fields),
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F1 = fun() ->
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mnesia:write_lock_table(mod_offline_tmp_table),
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mnesia:foldl(
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fun(#offline_msg{us = U} = R, _) ->
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mnesia:dirty_write(
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|
mod_offline_tmp_table,
|
|
R#offline_msg{us = {U, Host}})
|
|
end, ok, offline_msg)
|
|
end,
|
|
mnesia:transaction(F1),
|
|
mnesia:clear_table(offline_msg),
|
|
F2 = fun() ->
|
|
mnesia:write_lock_table(offline_msg),
|
|
mnesia:foldl(
|
|
fun(R, _) ->
|
|
mnesia:dirty_write(R)
|
|
end, ok, mod_offline_tmp_table)
|
|
end,
|
|
mnesia:transaction(F2),
|
|
mnesia:delete_table(mod_offline_tmp_table);
|
|
_ ->
|
|
?INFO_MSG("Recreating offline_msg table", []),
|
|
mnesia:transform_table(offline_msg, ignore, Fields)
|
|
end.
|
|
|
|
|
|
%% Helper functions:
|
|
|
|
%% Warn senders that their messages have been discarded:
|
|
discard_warn_sender(Msgs) ->
|
|
lists:foreach(
|
|
fun(#offline_msg{from=From, to=To, packet=Packet}) ->
|
|
ErrText = "Your contact offline message queue is full. The message has been discarded.",
|
|
Lang = xml:get_tag_attr_s("xml:lang", Packet),
|
|
Err = jlib:make_error_reply(
|
|
Packet, ?ERRT_RESOURCE_CONSTRAINT(Lang, ErrText)),
|
|
ejabberd_router:route(
|
|
To,
|
|
From, Err)
|
|
end, Msgs).
|
|
|
|
|
|
webadmin_page(_, Host,
|
|
#request{us = _US,
|
|
path = ["user", U, "queue"],
|
|
q = Query,
|
|
lang = Lang} = _Request) ->
|
|
Res = user_queue(U, Host, Query, Lang),
|
|
{stop, Res};
|
|
|
|
webadmin_page(Acc, _, _) -> Acc.
|
|
|
|
user_queue(User, Server, Query, Lang) ->
|
|
US = {jlib:nodeprep(User), jlib:nameprep(Server)},
|
|
Res = user_queue_parse_query(US, Query),
|
|
MsgsAll = lists:keysort(#offline_msg.timestamp,
|
|
mnesia:dirty_read({offline_msg, US})),
|
|
Msgs = get_messages_subset(User, Server, MsgsAll),
|
|
FMsgs =
|
|
lists:map(
|
|
fun(#offline_msg{timestamp = TimeStamp, from = From, to = To,
|
|
packet = {xmlelement, Name, Attrs, Els}} = Msg) ->
|
|
ID = jlib:encode_base64(binary_to_list(term_to_binary(Msg))),
|
|
{{Year, Month, Day}, {Hour, Minute, Second}} =
|
|
calendar:now_to_local_time(TimeStamp),
|
|
Time = lists:flatten(
|
|
io_lib:format(
|
|
"~w-~.2.0w-~.2.0w ~.2.0w:~.2.0w:~.2.0w",
|
|
[Year, Month, Day, Hour, Minute, Second])),
|
|
SFrom = jlib:jid_to_string(From),
|
|
STo = jlib:jid_to_string(To),
|
|
Attrs2 = jlib:replace_from_to_attrs(SFrom, STo, Attrs),
|
|
Packet = {xmlelement, Name, Attrs2, Els},
|
|
FPacket = ejabberd_web_admin:pretty_print_xml(Packet),
|
|
?XE("tr",
|
|
[?XAE("td", [{"class", "valign"}], [?INPUT("checkbox", "selected", ID)]),
|
|
?XAC("td", [{"class", "valign"}], Time),
|
|
?XAC("td", [{"class", "valign"}], SFrom),
|
|
?XAC("td", [{"class", "valign"}], STo),
|
|
?XAE("td", [{"class", "valign"}], [?XC("pre", FPacket)])]
|
|
)
|
|
end, Msgs),
|
|
[?XC("h1", io_lib:format(?T("~s's Offline Messages Queue"),
|
|
[us_to_list(US)]))] ++
|
|
case Res of
|
|
ok -> [?XREST("Submitted")];
|
|
nothing -> []
|
|
end ++
|
|
[?XAE("form", [{"action", ""}, {"method", "post"}],
|
|
[?XE("table",
|
|
[?XE("thead",
|
|
[?XE("tr",
|
|
[?X("td"),
|
|
?XCT("td", "Time"),
|
|
?XCT("td", "From"),
|
|
?XCT("td", "To"),
|
|
?XCT("td", "Packet")
|
|
])]),
|
|
?XE("tbody",
|
|
if
|
|
FMsgs == [] ->
|
|
[?XE("tr",
|
|
[?XAC("td", [{"colspan", "4"}], " ")]
|
|
)];
|
|
true ->
|
|
FMsgs
|
|
end
|
|
)]),
|
|
?BR,
|
|
?INPUTT("submit", "delete", "Delete Selected")
|
|
])].
|
|
|
|
user_queue_parse_query(US, Query) ->
|
|
case lists:keysearch("delete", 1, Query) of
|
|
{value, _} ->
|
|
Msgs = lists:keysort(#offline_msg.timestamp,
|
|
mnesia:dirty_read({offline_msg, US})),
|
|
F = fun() ->
|
|
lists:foreach(
|
|
fun(Msg) ->
|
|
ID = jlib:encode_base64(
|
|
binary_to_list(term_to_binary(Msg))),
|
|
case lists:member({"selected", ID}, Query) of
|
|
true ->
|
|
mnesia:delete_object(Msg);
|
|
false ->
|
|
ok
|
|
end
|
|
end, Msgs)
|
|
end,
|
|
mnesia:transaction(F),
|
|
ok;
|
|
false ->
|
|
nothing
|
|
end.
|
|
|
|
us_to_list({User, Server}) ->
|
|
jlib:jid_to_string({User, Server, ""}).
|
|
|
|
get_queue_length(User, Server) ->
|
|
length(mnesia:dirty_read({offline_msg, {User, Server}})).
|
|
|
|
get_messages_subset(User, Host, MsgsAll) ->
|
|
Access = gen_mod:get_module_opt(Host, ?MODULE, access_max_user_messages,
|
|
max_user_offline_messages),
|
|
MaxOfflineMsgs = case get_max_user_messages(Access, User, Host) of
|
|
Number when is_integer(Number) -> Number;
|
|
_ -> 100
|
|
end,
|
|
Length = length(MsgsAll),
|
|
get_messages_subset2(MaxOfflineMsgs, Length, MsgsAll).
|
|
|
|
get_messages_subset2(Max, Length, MsgsAll) when Length =< Max*2 ->
|
|
MsgsAll;
|
|
get_messages_subset2(Max, Length, MsgsAll) ->
|
|
FirstN = Max,
|
|
{MsgsFirstN, Msgs2} = lists:split(FirstN, MsgsAll),
|
|
MsgsLastN = lists:nthtail(Length - FirstN - FirstN, Msgs2),
|
|
NoJID = jlib:make_jid("...", "...", ""),
|
|
IntermediateMsg = #offline_msg{timestamp = now(), from = NoJID, to = NoJID,
|
|
packet = {xmlelement, "...", [], []}},
|
|
MsgsFirstN ++ [IntermediateMsg] ++ MsgsLastN.
|
|
|
|
webadmin_user(Acc, User, Server, Lang) ->
|
|
QueueLen = get_queue_length(jlib:nodeprep(User), jlib:nameprep(Server)),
|
|
FQueueLen = [?AC("queue/",
|
|
integer_to_list(QueueLen))],
|
|
Acc ++ [?XCT("h3", "Offline Messages:")] ++ FQueueLen ++ [?C(" "), ?INPUTT("submit", "removealloffline", "Remove All Offline Messages")].
|
|
|
|
webadmin_user_parse_query(_, "removealloffline", User, Server, _Query) ->
|
|
US = {User, Server},
|
|
F = fun() ->
|
|
mnesia:write_lock_table(offline_msg),
|
|
lists:foreach(
|
|
fun(Msg) ->
|
|
mnesia:delete_object(Msg)
|
|
end, mnesia:dirty_read({offline_msg, US}))
|
|
end,
|
|
case mnesia:transaction(F) of
|
|
{aborted, Reason} ->
|
|
?ERROR_MSG("Failed to remove offline messages: ~p", [Reason]),
|
|
{stop, error};
|
|
{atomic, ok} ->
|
|
?INFO_MSG("Removed all offline messages for ~s@~s", [User, Server]),
|
|
{stop, ok}
|
|
end;
|
|
webadmin_user_parse_query(Acc, _Action, _User, _Server, _Query) ->
|
|
Acc.
|