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xmpp.chapril.org-ejabberd/src/mod_offline.erl
Badlop 1d3947c0da Replace TYPE/1 with is_TYPE/1 (EJAB-922) 
SVN Revision: 2057
2009-05-06 16:54:43 +00:00

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%%%----------------------------------------------------------------------
%%% File : mod_offline.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Store and manage offline messages in Mnesia database.
%%% Created : 5 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2009 ProcessOne
%%%
%%% This program is free software; you can redistribute it and/or
%%% modify it under the terms of the GNU General Public License as
%%% published by the Free Software Foundation; either version 2 of the
%%% License, or (at your option) any later version.
%%%
%%% This program is distributed in the hope that it will be useful,
%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
%%% General Public License for more details.
%%%
%%% You should have received a copy of the GNU General Public License
%%% along with this program; if not, write to the Free Software
%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
-module(mod_offline).
-author('alexey@process-one.net').
-behaviour(gen_mod).
-export([start/2,
init/1,
stop/1,
store_packet/3,
resend_offline_messages/2,
pop_offline_messages/3,
remove_expired_messages/0,
remove_old_messages/1,
remove_user/2,
webadmin_page/3,
webadmin_user/4,
webadmin_user_parse_query/5]).
-include_lib("exmpp/include/exmpp.hrl").
-include("ejabberd.hrl").
-include("web/ejabberd_http.hrl").
-include("web/ejabberd_web_admin.hrl").
-record(offline_msg, {us, timestamp, expire, from, to, packet}).
-define(PROCNAME, ejabberd_offline).
-define(OFFLINE_TABLE_LOCK_THRESHOLD, 1000).
% These are the namespace already declared by the stream opening. This is
% used at serialization time.
-define(DEFAULT_NS, ?NS_JABBER_CLIENT).
-define(PREFIXED_NS, [{?NS_XMPP, ?NS_XMPP_pfx}]).
start(Host, Opts) ->
HostB = list_to_binary(Host),
mnesia:create_table(offline_msg,
[{disc_only_copies, [node()]},
{type, bag},
{attributes, record_info(fields, offline_msg)}]),
update_table(),
ejabberd_hooks:add(offline_message_hook, HostB,
?MODULE, store_packet, 50),
ejabberd_hooks:add(resend_offline_messages_hook, HostB,
?MODULE, pop_offline_messages, 50),
ejabberd_hooks:add(remove_user, HostB,
?MODULE, remove_user, 50),
ejabberd_hooks:add(anonymous_purge_hook, HostB,
?MODULE, remove_user, 50),
ejabberd_hooks:add(webadmin_page_host, HostB,
?MODULE, webadmin_page, 50),
ejabberd_hooks:add(webadmin_user, HostB,
?MODULE, webadmin_user, 50),
ejabberd_hooks:add(webadmin_user_parse_query, HostB,
?MODULE, webadmin_user_parse_query, 50),
MaxOfflineMsgs = gen_mod:get_opt(user_max_messages, Opts, infinity),
register(gen_mod:get_module_proc(Host, ?PROCNAME),
spawn(?MODULE, init, [MaxOfflineMsgs])).
%% MaxOfflineMsgs is either infinity of integer > 0
init(infinity) ->
loop(infinity);
init(MaxOfflineMsgs)
when is_integer(MaxOfflineMsgs), MaxOfflineMsgs > 0 ->
loop(MaxOfflineMsgs).
loop(MaxOfflineMsgs) ->
receive
#offline_msg{us=US} = Msg ->
Msgs = receive_all(US, [Msg]),
Len = length(Msgs),
F = fun() ->
%% Only count messages if needed:
Count = if MaxOfflineMsgs =/= infinity ->
Len + p1_mnesia:count_records(
offline_msg,
#offline_msg{us=US, _='_'});
true ->
0
end,
if
Count > MaxOfflineMsgs ->
discard_warn_sender(Msgs);
true ->
if
Len >= ?OFFLINE_TABLE_LOCK_THRESHOLD ->
mnesia:write_lock_table(offline_msg);
true ->
ok
end,
lists:foreach(fun(M) ->
mnesia:write(M)
end, Msgs)
end
end,
mnesia:transaction(F),
loop(MaxOfflineMsgs);
_ ->
loop(MaxOfflineMsgs)
end.
receive_all(US, Msgs) ->
receive
#offline_msg{us=US} = Msg ->
receive_all(US, [Msg | Msgs])
after 0 ->
Msgs
end.
stop(Host) ->
HostB = list_to_binary(Host),
ejabberd_hooks:delete(offline_message_hook, HostB,
?MODULE, store_packet, 50),
ejabberd_hooks:delete(resend_offline_messages_hook, HostB,
?MODULE, pop_offline_messages, 50),
ejabberd_hooks:delete(remove_user, HostB,
?MODULE, remove_user, 50),
ejabberd_hooks:delete(anonymous_purge_hook, HostB,
?MODULE, remove_user, 50),
ejabberd_hooks:delete(webadmin_page_host, HostB,
?MODULE, webadmin_page, 50),
ejabberd_hooks:delete(webadmin_user, HostB,
?MODULE, webadmin_user, 50),
ejabberd_hooks:delete(webadmin_user_parse_query, HostB,
?MODULE, webadmin_user_parse_query, 50),
Proc = gen_mod:get_module_proc(Host, ?PROCNAME),
exit(whereis(Proc), stop),
{wait, Proc}.
store_packet(From, To, Packet) ->
Type = exmpp_stanza:get_type(Packet),
if
(Type /= <<"error">>) and (Type /= <<"groupchat">>) and
(Type /= <<"headline">>) ->
case check_event(From, To, Packet) of
true ->
LUser = exmpp_jid:lnode_as_list(To),
LServer = exmpp_jid:ldomain_as_list(To),
TimeStamp = now(),
Expire = find_x_expire(TimeStamp, Packet#xmlel.children),
gen_mod:get_module_proc(LServer, ?PROCNAME) !
#offline_msg{us = {LUser, LServer},
timestamp = TimeStamp,
expire = Expire,
from = From,
to = To,
packet = Packet},
stop;
_ ->
ok
end;
true ->
ok
end.
check_event(From, To, Packet) ->
case find_x_event(Packet#xmlel.children) of
false ->
true;
El ->
case exmpp_xml:get_element(El, 'id') of
undefined ->
case exmpp_xml:get_element(El, 'offline') of
undefined ->
true;
_ ->
ID = case exmpp_stanza:get_id(Packet) of
undefined ->
#xmlel{ns = ?NS_MESSAGE_EVENT, name = 'id'};
S ->
#xmlel{ns = ?NS_MESSAGE_EVENT, name = 'id',
children = [#xmlcdata{cdata =
S}]}
end,
X = #xmlel{ns = ?NS_MESSAGE_EVENT, name = 'x', children =
[ID, #xmlel{ns = ?NS_MESSAGE_EVENT, name = 'offline'}]},
ejabberd_router:route(
To, From, exmpp_xml:set_children(Packet, [X])),
true
end;
_ ->
false
end
end.
find_x_event([]) ->
false;
find_x_event([#xmlel{ns = ?NS_MESSAGE_EVENT} = El | _Els]) ->
El;
find_x_event([_ | Els]) ->
find_x_event(Els).
find_x_expire(_, []) ->
never;
find_x_expire(TimeStamp, [#xmlel{ns = ?NS_MESSAGE_EXPIRE} = El | _Els]) ->
Val = exmpp_xml:get_attribute_as_list(El, 'seconds', ""),
case catch list_to_integer(Val) of
{'EXIT', _} ->
never;
Int when Int > 0 ->
{MegaSecs, Secs, MicroSecs} = TimeStamp,
S = MegaSecs * 1000000 + Secs + Int,
MegaSecs1 = S div 1000000,
Secs1 = S rem 1000000,
{MegaSecs1, Secs1, MicroSecs};
_ ->
never
end;
find_x_expire(TimeStamp, [_ | Els]) ->
find_x_expire(TimeStamp, Els).
resend_offline_messages(User, Server) ->
try
LUser = exmpp_stringprep:nodeprep(User),
LServer = exmpp_stringprep:nameprep(Server),
US = {LUser, LServer},
F = fun() ->
Rs = mnesia:wread({offline_msg, US}),
mnesia:delete({offline_msg, US}),
Rs
end,
case mnesia:transaction(F) of
{atomic, Rs} ->
lists:foreach(
fun(R) ->
Packet = R#offline_msg.packet,
ejabberd_sm !
{route,
R#offline_msg.from,
R#offline_msg.to,
exmpp_xml:append_child(Packet,
jlib:timestamp_to_xml(
calendar:now_to_universal_time(
R#offline_msg.timestamp)))}
end,
lists:keysort(#offline_msg.timestamp, Rs));
_ ->
ok
end
catch
_ ->
ok
end.
pop_offline_messages(Ls, User, Server)
when is_binary(User), is_binary(Server) ->
try
LUser = binary_to_list(User),
LServer = binary_to_list(Server),
US = {LUser, LServer},
F = fun() ->
Rs = mnesia:wread({offline_msg, US}),
mnesia:delete({offline_msg, US}),
Rs
end,
case mnesia:transaction(F) of
{atomic, Rs} ->
TS = now(),
Ls ++ lists:map(
fun(R) ->
Packet = R#offline_msg.packet,
{route,
R#offline_msg.from,
R#offline_msg.to,
exmpp_xml:append_child(Packet,
jlib:timestamp_to_xml(
calendar:now_to_universal_time(
R#offline_msg.timestamp)))}
end,
lists:filter(
fun(R) ->
case R#offline_msg.expire of
never ->
true;
TimeStamp ->
TS < TimeStamp
end
end,
lists:keysort(#offline_msg.timestamp, Rs)));
_ ->
Ls
end
catch
_ ->
Ls
end.
remove_expired_messages() ->
TimeStamp = now(),
F = fun() ->
mnesia:write_lock_table(offline_msg),
mnesia:foldl(
fun(Rec, _Acc) ->
case Rec#offline_msg.expire of
never ->
ok;
TS ->
if
TS < TimeStamp ->
mnesia:delete_object(Rec);
true ->
ok
end
end
end, ok, offline_msg)
end,
mnesia:transaction(F).
remove_old_messages(Days) ->
{MegaSecs, Secs, _MicroSecs} = now(),
S = MegaSecs * 1000000 + Secs - 60 * 60 * 24 * Days,
MegaSecs1 = S div 1000000,
Secs1 = S rem 1000000,
TimeStamp = {MegaSecs1, Secs1, 0},
F = fun() ->
mnesia:write_lock_table(offline_msg),
mnesia:foldl(
fun(#offline_msg{timestamp = TS} = Rec, _Acc)
when TS < TimeStamp ->
mnesia:delete_object(Rec);
(_Rec, _Acc) -> ok
end, ok, offline_msg)
end,
mnesia:transaction(F).
remove_user(User, Server) when is_binary(User), is_binary(Server) ->
try
LUser = exmpp_stringprep:nodeprep(User),
LServer = exmpp_stringprep:nameprep(Server),
US = {LUser, LServer},
F = fun() ->
mnesia:delete({offline_msg, US})
end,
mnesia:transaction(F)
catch
_ ->
ok
end.
update_table() ->
Fields = record_info(fields, offline_msg),
case mnesia:table_info(offline_msg, attributes) of
Fields ->
convert_to_exmpp();
[user, timestamp, expire, from, to, packet] ->
?INFO_MSG("Converting offline_msg table from "
"{user, timestamp, expire, from, to, packet} format", []),
Host = ?MYNAME,
{atomic, ok} = mnesia:create_table(
mod_offline_tmp_table,
[{disc_only_copies, [node()]},
{type, bag},
{local_content, true},
{record_name, offline_msg},
{attributes, record_info(fields, offline_msg)}]),
mnesia:transform_table(offline_msg, ignore, Fields),
F1 = fun() ->
mnesia:write_lock_table(mod_offline_tmp_table),
mnesia:foldl(
fun(#offline_msg{us = U, from = F, to = T, packet = P} = R, _) ->
U1 = convert_jid_to_exmpp(U),
F1 = jlib:from_old_jid(F),
T1 = jlib:from_old_jid(T),
P1 = exmpp_xml:xmlelement_to_xmlel(
P,
[?DEFAULT_NS],
?PREFIXED_NS),
New_R = R#offline_msg{
us = {U1, Host},
from = F1,
to = T1,
packet = P1
},
mnesia:dirty_write(
mod_offline_tmp_table,
New_R)
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);
[user, timestamp, from, to, packet] ->
?INFO_MSG("Converting offline_msg table from "
"{user, timestamp, from, to, packet} format", []),
Host = ?MYNAME,
{atomic, ok} = mnesia:create_table(
mod_offline_tmp_table,
[{disc_only_copies, [node()]},
{type, bag},
{local_content, true},
{record_name, offline_msg},
{attributes, record_info(fields, offline_msg)}]),
mnesia:transform_table(
offline_msg,
fun({_, U, TS, F, T, P}) ->
Expire = find_x_expire(TS, P#xmlelement.children),
U1 = convert_jid_to_exmpp(U),
F1 = jlib:from_old_jid(F),
T1 = jlib:from_old_jid(T),
P1 = exmpp_xml:xmlelement_to_xmlel(
P,
[?DEFAULT_NS],
?PREFIXED_NS),
#offline_msg{us = U1,
timestamp = TS,
expire = Expire,
from = F1,
to = T1,
packet = P1}
end, Fields),
F1 = fun() ->
mnesia:write_lock_table(mod_offline_tmp_table),
mnesia:foldl(
fun(#offline_msg{us = U} = R, _) ->
mnesia:dirty_write(
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.
convert_to_exmpp() ->
Fun = fun() ->
case mnesia:first(offline_msg) of
'$end_of_table' ->
none;
Key ->
case mnesia:read({offline_msg, Key}) of
[#offline_msg{packet = #xmlel{}} | _] ->
none;
[#offline_msg{packet = #xmlelement{}} | _] ->
mnesia:foldl(fun convert_to_exmpp2/2,
done, offline_msg, write)
end
end
end,
mnesia:transaction(Fun).
convert_to_exmpp2(#offline_msg{
us = {US_U, US_S},
from = From,
to = To,
packet = Packet} = R, Acc) ->
% Remove old entry.
mnesia:delete_object(R),
% Convert "" to undefined in JIDs.
US_U1 = convert_jid_to_exmpp(US_U),
US_S1 = convert_jid_to_exmpp(US_S),
From1 = jlib:from_old_jid(From),
To1 = jlib:from_old_jid(To),
% Convert stanza.
Packet1 = exmpp_xml:xmlelement_to_xmlel(Packet,
[?DEFAULT_NS], ?PREFIXED_NS),
% Prepare the new record.
New_R = R#offline_msg{
us = {US_U1, US_S1},
from = From1,
to = To1,
packet = Packet1},
% Write the new record.
mnesia:write(New_R),
Acc.
convert_jid_to_exmpp("") -> undefined;
convert_jid_to_exmpp(V) -> V.
%% 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.",
Error = exmpp_stanza:error('resource-constraint',
{"en", ErrText}),
Err = exmpp_stanza:reply_with_error(Packet, Error),
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, Msgs, Res} = try
US0 = {
exmpp_stringprep:nodeprep(User),
exmpp_stringprep:nameprep(Server)
},
{
US0,
lists:keysort(#offline_msg.timestamp,
mnesia:dirty_read({offline_msg, US0})),
user_queue_parse_query(US0, Query)
}
catch
_ ->
{{"invalid", "invalid"}, [], nothing}
end,
FMsgs =
lists:map(
fun(#offline_msg{timestamp = TimeStamp, from = From, to = To,
packet = Packet} = 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 = exmpp_jid:jid_to_list(From),
STo = exmpp_jid:jid_to_list(To),
Packet1 = exmpp_stanza:set_jids(Packet, SFrom, STo),
FPacket = exmpp_xml:node_to_list(
exmpp_xml:indent_document(Packet1, <<" ">>),
[?DEFAULT_NS], ?PREFIXED_NS),
?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}) ->
exmpp_jid:jid_to_list(User, Server).
webadmin_user(Acc, User, Server, Lang) ->
FQueueLen = try
US = {
exmpp_stringprep:nodeprep(User),
exmpp_stringprep:nameprep(Server)
},
QueueLen = length(mnesia:dirty_read({offline_msg, US})),
[?AC("queue/",
integer_to_list(QueueLen))]
catch
_ ->
[?C("?")]
end,
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.
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