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xmpp.chapril.org-ejabberd/src/mod_vcard.erl
Evgeniy Khramtsov 66fc1bf3b6 Remove 'iqdisc' option 
Since we got rid of all bottle-neck processes and we have
a connection pool for every database, the option is no longer
needed and in fact is detrimental: in practice what you get
is just a bunch of overloaded processes in the IQ handlers pool
no matter how much you increase the `iqdisc` value.

Given that there are close to zero operators understanding
the meaning of the option and, hence, not using it all,
it's not simply deprecated but completely removed.

The commit also deprecates the following functions:
- gen_iq_handler:add_iq_handler/6
- gen_iq_handler:handle/5
- gen_iq_handler:iqdisc/1
2018-02-11 12:54:15 +03:00

565 lines
20 KiB
Erlang
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%%%----------------------------------------------------------------------
%%% File : mod_vcard.erl
%%% Author : Alexey Shchepin <alexey@process-one.net>
%%% Purpose : Vcard management
%%% Created : 2 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2018 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.,
%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
%%%
%%%----------------------------------------------------------------------
-module(mod_vcard).
-author('alexey@process-one.net').
-protocol({xep, 54, '1.2'}).
-protocol({xep, 55, '1.3'}).
-behaviour(gen_server).
-behaviour(gen_mod).
-export([start/2, stop/1, get_sm_features/5, mod_options/1,
process_local_iq/1, process_sm_iq/1, string2lower/1,
remove_user/2, export/1, import_info/0, import/5, import_start/2,
depends/2, process_search/1, process_vcard/1, get_vcard/2,
disco_items/5, disco_features/5, disco_identity/5,
vcard_iq_set/1, mod_opt_type/1, set_vcard/3, make_vcard_search/4]).
-export([init/1, handle_call/3, handle_cast/2,
handle_info/2, terminate/2, code_change/3]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include("xmpp.hrl").
-include("mod_vcard.hrl").
-include("translate.hrl").
-define(VCARD_CACHE, vcard_cache).
-callback init(binary(), gen_mod:opts()) -> any().
-callback stop(binary()) -> any().
-callback import(binary(), binary(), [binary()]) -> ok.
-callback get_vcard(binary(), binary()) -> {ok, [xmlel()]} | error.
-callback set_vcard(binary(), binary(),
xmlel(), #vcard_search{}) -> {atomic, any()}.
-callback search_fields(binary()) -> [{binary(), binary()}].
-callback search_reported(binary()) -> [{binary(), binary()}].
-callback search(binary(), [{binary(), [binary()]}], boolean(),
infinity | pos_integer()) -> [{binary(), binary()}].
-callback remove_user(binary(), binary()) -> {atomic, any()}.
-callback is_search_supported(binary()) -> boolean().
-callback use_cache(binary()) -> boolean().
-callback cache_nodes(binary()) -> [node()].
-optional_callbacks([use_cache/1, cache_nodes/1]).
-record(state, {hosts :: [binary()], server_host :: binary()}).
%%====================================================================
%% gen_mod callbacks
%%====================================================================
start(Host, Opts) ->
gen_mod:start_child(?MODULE, Host, Opts).
stop(Host) ->
gen_mod:stop_child(?MODULE, Host).
%%====================================================================
%% gen_server callbacks
%%====================================================================
init([Host, Opts]) ->
process_flag(trap_exit, true),
Mod = gen_mod:db_mod(Host, Opts, ?MODULE),
Mod:init(Host, Opts),
init_cache(Mod, Host, Opts),
ejabberd_hooks:add(remove_user, Host, ?MODULE,
remove_user, 50),
gen_iq_handler:add_iq_handler(ejabberd_local, Host,
?NS_VCARD, ?MODULE, process_local_iq),
gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
?NS_VCARD, ?MODULE, process_sm_iq),
ejabberd_hooks:add(disco_sm_features, Host, ?MODULE,
get_sm_features, 50),
ejabberd_hooks:add(vcard_iq_set, Host, ?MODULE, vcard_iq_set, 50),
MyHosts = gen_mod:get_opt_hosts(Host, Opts),
Search = gen_mod:get_opt(search, Opts),
if Search ->
lists:foreach(
fun(MyHost) ->
ejabberd_hooks:add(
disco_local_items, MyHost, ?MODULE, disco_items, 100),
ejabberd_hooks:add(
disco_local_features, MyHost, ?MODULE, disco_features, 100),
ejabberd_hooks:add(
disco_local_identity, MyHost, ?MODULE, disco_identity, 100),
gen_iq_handler:add_iq_handler(
ejabberd_local, MyHost, ?NS_SEARCH, ?MODULE, process_search),
gen_iq_handler:add_iq_handler(
ejabberd_local, MyHost, ?NS_VCARD, ?MODULE, process_vcard),
gen_iq_handler:add_iq_handler(
ejabberd_local, MyHost, ?NS_DISCO_ITEMS, mod_disco,
process_local_iq_items),
gen_iq_handler:add_iq_handler(
ejabberd_local, MyHost, ?NS_DISCO_INFO, mod_disco,
process_local_iq_info),
case Mod:is_search_supported(Host) of
false ->
?WARNING_MSG("vcard search functionality is "
"not implemented for ~s backend",
[gen_mod:get_opt(db_type, Opts)]);
true ->
ejabberd_router:register_route(MyHost, Host)
end
end, MyHosts);
true ->
ok
end,
{ok, #state{hosts = MyHosts, server_host = Host}}.
handle_call(_Call, _From, State) ->
{noreply, State}.
handle_cast(Cast, State) ->
?WARNING_MSG("unexpected cast: ~p", [Cast]),
{noreply, State}.
handle_info({route, Packet}, State) ->
case catch do_route(Packet) of
{'EXIT', Reason} -> ?ERROR_MSG("~p", [Reason]);
_ -> ok
end,
{noreply, State};
handle_info(Info, State) ->
?WARNING_MSG("unexpected info: ~p", [Info]),
{noreply, State}.
terminate(_Reason, #state{hosts = MyHosts, server_host = Host}) ->
ejabberd_hooks:delete(remove_user, Host, ?MODULE, remove_user, 50),
gen_iq_handler:remove_iq_handler(ejabberd_local, Host, ?NS_VCARD),
gen_iq_handler:remove_iq_handler(ejabberd_sm, Host, ?NS_VCARD),
ejabberd_hooks:delete(disco_sm_features, Host, ?MODULE, get_sm_features, 50),
ejabberd_hooks:delete(vcard_iq_set, Host, ?MODULE, vcard_iq_set, 50),
Mod = gen_mod:db_mod(Host, ?MODULE),
Mod:stop(Host),
lists:foreach(
fun(MyHost) ->
ejabberd_router:unregister_route(MyHost),
ejabberd_hooks:delete(disco_local_items, MyHost, ?MODULE, disco_items, 100),
ejabberd_hooks:delete(disco_local_features, MyHost, ?MODULE, disco_features, 100),
ejabberd_hooks:delete(disco_local_identity, MyHost, ?MODULE, disco_identity, 100),
gen_iq_handler:remove_iq_handler(ejabberd_local, MyHost, ?NS_SEARCH),
gen_iq_handler:remove_iq_handler(ejabberd_local, MyHost, ?NS_VCARD),
gen_iq_handler:remove_iq_handler(ejabberd_local, MyHost, ?NS_DISCO_ITEMS),
gen_iq_handler:remove_iq_handler(ejabberd_local, MyHost, ?NS_DISCO_INFO)
end, MyHosts).
code_change(_OldVsn, State, _Extra) ->
{ok, State}.
do_route(#iq{} = IQ) ->
ejabberd_router:process_iq(IQ);
do_route(_) ->
ok.
-spec get_sm_features({error, stanza_error()} | empty | {result, [binary()]},
jid(), jid(), binary(), binary()) ->
{error, stanza_error()} | empty | {result, [binary()]}.
get_sm_features({error, _Error} = Acc, _From, _To,
_Node, _Lang) ->
Acc;
get_sm_features(Acc, _From, _To, Node, _Lang) ->
case Node of
<<"">> ->
case Acc of
{result, Features} ->
{result, [?NS_DISCO_INFO, ?NS_VCARD | Features]};
empty -> {result, [?NS_DISCO_INFO, ?NS_VCARD]}
end;
_ -> Acc
end.
-spec process_local_iq(iq()) -> iq().
process_local_iq(#iq{type = set, lang = Lang} = IQ) ->
Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
xmpp:make_error(IQ, xmpp:err_not_allowed(Txt, Lang));
process_local_iq(#iq{type = get, lang = Lang} = IQ) ->
Desc = translate:translate(Lang, <<"Erlang Jabber Server">>),
xmpp:make_iq_result(
IQ, #vcard_temp{fn = <<"ejabberd">>,
url = ?EJABBERD_URI,
desc = <<Desc/binary, $\n, ?COPYRIGHT>>,
bday = <<"2002-11-16">>}).
-spec process_sm_iq(iq()) -> iq().
process_sm_iq(#iq{type = set, lang = Lang, from = From} = IQ) ->
#jid{lserver = LServer} = From,
case lists:member(LServer, ?MYHOSTS) of
true ->
case ejabberd_hooks:run_fold(vcard_iq_set, LServer, IQ, []) of
drop -> ignore;
#stanza_error{} = Err -> xmpp:make_error(IQ, Err);
_ -> xmpp:make_iq_result(IQ)
end;
false ->
Txt = <<"The query is only allowed from local users">>,
xmpp:make_error(IQ, xmpp:err_not_allowed(Txt, Lang))
end;
process_sm_iq(#iq{type = get, from = From, to = To, lang = Lang} = IQ) ->
#jid{luser = LUser, lserver = LServer} = To,
case get_vcard(LUser, LServer) of
error ->
Txt = <<"Database failure">>,
xmpp:make_error(IQ, xmpp:err_internal_server_error(Txt, Lang));
[] ->
xmpp:make_iq_result(IQ, #vcard_temp{});
Els ->
IQ#iq{type = result, to = From, from = To, sub_els = Els}
end.
-spec process_vcard(iq()) -> iq().
process_vcard(#iq{type = set, lang = Lang} = IQ) ->
Txt = <<"Value 'set' of 'type' attribute is not allowed">>,
xmpp:make_error(IQ, xmpp:err_not_allowed(Txt, Lang));
process_vcard(#iq{type = get, lang = Lang} = IQ) ->
Desc = translate:translate(Lang, <<"ejabberd vCard module">>),
xmpp:make_iq_result(
IQ, #vcard_temp{fn = <<"ejabberd/mod_vcard">>,
url = ?EJABBERD_URI,
desc = <<Desc/binary, $\n, ?COPYRIGHT>>}).
-spec process_search(iq()) -> iq().
process_search(#iq{type = get, to = To, lang = Lang} = IQ) ->
ServerHost = ejabberd_router:host_of_route(To#jid.lserver),
xmpp:make_iq_result(IQ, mk_search_form(To, ServerHost, Lang));
process_search(#iq{type = set, to = To, lang = Lang,
sub_els = [#search{xdata = #xdata{type = submit,
fields = Fs}}]} = IQ) ->
ServerHost = ejabberd_router:host_of_route(To#jid.lserver),
ResultXData = search_result(Lang, To, ServerHost, Fs),
xmpp:make_iq_result(IQ, #search{xdata = ResultXData});
process_search(#iq{type = set, lang = Lang} = IQ) ->
Txt = <<"Incorrect data form">>,
xmpp:make_error(IQ, xmpp:err_bad_request(Txt, Lang)).
-spec disco_items({error, stanza_error()} | {result, [disco_item()]} | empty,
jid(), jid(), binary(), binary()) ->
{error, stanza_error()} | {result, [disco_item()]}.
disco_items(empty, _From, _To, <<"">>, _Lang) ->
{result, []};
disco_items(empty, _From, _To, _Node, Lang) ->
{error, xmpp:err_item_not_found(<<"No services available">>, Lang)};
disco_items(Acc, _From, _To, _Node, _Lang) ->
Acc.
-spec disco_features({error, stanza_error()} | {result, [binary()]} | empty,
jid(), jid(), binary(), binary()) ->
{error, stanza_error()} | {result, [binary()]}.
disco_features({error, _Error} = Acc, _From, _To, _Node, _Lang) ->
Acc;
disco_features(Acc, _From, _To, <<"">>, _Lang) ->
Features = case Acc of
{result, Fs} -> Fs;
empty -> []
end,
{result, [?NS_DISCO_INFO, ?NS_DISCO_ITEMS,
?NS_VCARD, ?NS_SEARCH | Features]};
disco_features(empty, _From, _To, _Node, Lang) ->
Txt = <<"No features available">>,
{error, xmpp:err_item_not_found(Txt, Lang)};
disco_features(Acc, _From, _To, _Node, _Lang) ->
Acc.
-spec disco_identity([identity()], jid(), jid(),
binary(), binary()) -> [identity()].
disco_identity(Acc, _From, To, <<"">>, Lang) ->
Host = ejabberd_router:host_of_route(To#jid.lserver),
Name = gen_mod:get_module_opt(Host, ?MODULE, name),
[#identity{category = <<"directory">>,
type = <<"user">>,
name = translate:translate(Lang, Name)}|Acc];
disco_identity(Acc, _From, _To, _Node, _Lang) ->
Acc.
-spec get_vcard(binary(), binary()) -> [xmlel()] | error.
get_vcard(LUser, LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Result = case use_cache(Mod, LServer) of
true ->
ets_cache:lookup(
?VCARD_CACHE, {LUser, LServer},
fun() -> Mod:get_vcard(LUser, LServer) end);
false ->
Mod:get_vcard(LUser, LServer)
end,
case Result of
{ok, Els} -> Els;
error -> error
end.
-spec make_vcard_search(binary(), binary(), binary(), xmlel()) -> #vcard_search{}.
make_vcard_search(User, LUser, LServer, VCARD) ->
FN = fxml:get_path_s(VCARD, [{elem, <<"FN">>}, cdata]),
Family = fxml:get_path_s(VCARD,
[{elem, <<"N">>}, {elem, <<"FAMILY">>}, cdata]),
Given = fxml:get_path_s(VCARD,
[{elem, <<"N">>}, {elem, <<"GIVEN">>}, cdata]),
Middle = fxml:get_path_s(VCARD,
[{elem, <<"N">>}, {elem, <<"MIDDLE">>}, cdata]),
Nickname = fxml:get_path_s(VCARD,
[{elem, <<"NICKNAME">>}, cdata]),
BDay = fxml:get_path_s(VCARD,
[{elem, <<"BDAY">>}, cdata]),
CTRY = fxml:get_path_s(VCARD,
[{elem, <<"ADR">>}, {elem, <<"CTRY">>}, cdata]),
Locality = fxml:get_path_s(VCARD,
[{elem, <<"ADR">>}, {elem, <<"LOCALITY">>},
cdata]),
EMail1 = fxml:get_path_s(VCARD,
[{elem, <<"EMAIL">>}, {elem, <<"USERID">>}, cdata]),
EMail2 = fxml:get_path_s(VCARD,
[{elem, <<"EMAIL">>}, cdata]),
OrgName = fxml:get_path_s(VCARD,
[{elem, <<"ORG">>}, {elem, <<"ORGNAME">>}, cdata]),
OrgUnit = fxml:get_path_s(VCARD,
[{elem, <<"ORG">>}, {elem, <<"ORGUNIT">>}, cdata]),
EMail = case EMail1 of
<<"">> -> EMail2;
_ -> EMail1
end,
LFN = string2lower(FN),
LFamily = string2lower(Family),
LGiven = string2lower(Given),
LMiddle = string2lower(Middle),
LNickname = string2lower(Nickname),
LBDay = string2lower(BDay),
LCTRY = string2lower(CTRY),
LLocality = string2lower(Locality),
LEMail = string2lower(EMail),
LOrgName = string2lower(OrgName),
LOrgUnit = string2lower(OrgUnit),
US = {LUser, LServer},
#vcard_search{us = US,
user = {User, LServer},
luser = LUser, fn = FN,
lfn = LFN,
family = Family,
lfamily = LFamily,
given = Given,
lgiven = LGiven,
middle = Middle,
lmiddle = LMiddle,
nickname = Nickname,
lnickname = LNickname,
bday = BDay,
lbday = LBDay,
ctry = CTRY,
lctry = LCTRY,
locality = Locality,
llocality = LLocality,
email = EMail,
lemail = LEMail,
orgname = OrgName,
lorgname = LOrgName,
orgunit = OrgUnit,
lorgunit = LOrgUnit}.
-spec vcard_iq_set(iq()) -> iq() | {stop, stanza_error()}.
vcard_iq_set(#iq{from = From, lang = Lang, sub_els = [VCard]} = IQ) ->
#jid{user = User, lserver = LServer} = From,
case set_vcard(User, LServer, VCard) of
{error, badarg} ->
%% Should not be here?
Txt = <<"Nodeprep has failed">>,
{stop, xmpp:err_internal_server_error(Txt, Lang)};
ok ->
IQ
end;
vcard_iq_set(Acc) ->
Acc.
-spec set_vcard(binary(), binary(), xmlel() | vcard_temp()) -> {error, badarg} | ok.
set_vcard(User, LServer, VCARD) ->
case jid:nodeprep(User) of
error ->
{error, badarg};
LUser ->
VCardEl = xmpp:encode(VCARD),
VCardSearch = make_vcard_search(User, LUser, LServer, VCardEl),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:set_vcard(LUser, LServer, VCardEl, VCardSearch),
ets_cache:delete(?VCARD_CACHE, {LUser, LServer},
cache_nodes(Mod, LServer)),
ok
end.
-spec string2lower(binary()) -> binary().
string2lower(String) ->
case stringprep:tolower(String) of
Lower when is_binary(Lower) -> Lower;
error -> str:to_lower(String)
end.
-spec mk_tfield(binary(), binary(), binary()) -> xdata_field().
mk_tfield(Label, Var, Lang) ->
#xdata_field{type = 'text-single',
label = translate:translate(Lang, Label),
var = Var}.
-spec mk_field(binary(), binary()) -> xdata_field().
mk_field(Var, Val) ->
#xdata_field{var = Var, values = [Val]}.
-spec mk_search_form(jid(), binary(), binary()) -> search().
mk_search_form(JID, ServerHost, Lang) ->
Title = <<(translate:translate(Lang, <<"Search users in ">>))/binary,
(jid:encode(JID))/binary>>,
Mod = gen_mod:db_mod(ServerHost, ?MODULE),
SearchFields = Mod:search_fields(ServerHost),
Fs = [mk_tfield(Label, Var, Lang) || {Label, Var} <- SearchFields],
X = #xdata{type = form,
title = Title,
instructions =
[translate:translate(
Lang,
<<"Fill in the form to search for any matching "
"Jabber User (Add * to the end of field "
"to match substring)">>)],
fields = Fs},
#search{instructions =
translate:translate(
Lang, <<"You need an x:data capable client to search">>),
xdata = X}.
-spec search_result(binary(), jid(), binary(), [xdata_field()]) -> xdata().
search_result(Lang, JID, ServerHost, XFields) ->
Mod = gen_mod:db_mod(ServerHost, ?MODULE),
Reported = [mk_tfield(Label, Var, Lang) ||
{Label, Var} <- Mod:search_reported(ServerHost)],
#xdata{type = result,
title = <<(translate:translate(Lang,
<<"Search Results for ">>))/binary,
(jid:encode(JID))/binary>>,
reported = Reported,
items = lists:map(fun (Item) -> item_to_field(Item) end,
search(ServerHost, XFields))}.
-spec item_to_field([{binary(), binary()}]) -> [xdata_field()].
item_to_field(Items) ->
[mk_field(Var, Value) || {Var, Value} <- Items].
-spec search(binary(), [xdata_field()]) -> [binary()].
search(LServer, XFields) ->
Data = [{Var, Vals} || #xdata_field{var = Var, values = Vals} <- XFields],
Mod = gen_mod:db_mod(LServer, ?MODULE),
AllowReturnAll = gen_mod:get_module_opt(LServer, ?MODULE, allow_return_all),
MaxMatch = gen_mod:get_module_opt(LServer, ?MODULE, matches),
Mod:search(LServer, Data, AllowReturnAll, MaxMatch).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec remove_user(binary(), binary()) -> ok.
remove_user(User, Server) ->
LUser = jid:nodeprep(User),
LServer = jid:nameprep(Server),
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:remove_user(LUser, LServer),
ets_cache:delete(?VCARD_CACHE, {LUser, LServer}, cache_nodes(Mod, LServer)).
-spec init_cache(module(), binary(), gen_mod:opts()) -> ok.
init_cache(Mod, Host, Opts) ->
case use_cache(Mod, Host) of
true ->
CacheOpts = cache_opts(Host, Opts),
ets_cache:new(?VCARD_CACHE, CacheOpts);
false ->
ets_cache:delete(?VCARD_CACHE)
end.
-spec cache_opts(binary(), gen_mod:opts()) -> [proplists:property()].
cache_opts(_Host, Opts) ->
MaxSize = gen_mod:get_opt(cache_size, Opts),
CacheMissed = gen_mod:get_opt(cache_missed, Opts),
LifeTime = case gen_mod:get_opt(cache_life_time, Opts) of
infinity -> infinity;
I -> timer:seconds(I)
end,
[{max_size, MaxSize}, {cache_missed, CacheMissed}, {life_time, LifeTime}].
-spec use_cache(module(), binary()) -> boolean().
use_cache(Mod, Host) ->
case erlang:function_exported(Mod, use_cache, 1) of
true -> Mod:use_cache(Host);
false -> gen_mod:get_module_opt(Host, ?MODULE, use_cache)
end.
-spec cache_nodes(module(), binary()) -> [node()].
cache_nodes(Mod, Host) ->
case erlang:function_exported(Mod, cache_nodes, 1) of
true -> Mod:cache_nodes(Host);
false -> ejabberd_cluster:get_nodes()
end.
import_info() ->
[{<<"vcard">>, 3}, {<<"vcard_search">>, 24}].
import_start(LServer, DBType) ->
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:init(LServer, []).
import(LServer, {sql, _}, DBType, Tab, L) ->
Mod = gen_mod:db_mod(DBType, ?MODULE),
Mod:import(LServer, Tab, L).
export(LServer) ->
Mod = gen_mod:db_mod(LServer, ?MODULE),
Mod:export(LServer).
depends(_Host, _Opts) ->
[].
mod_opt_type(allow_return_all) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(db_type) -> fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
mod_opt_type(name) -> fun iolist_to_binary/1;
mod_opt_type(host) -> fun iolist_to_binary/1;
mod_opt_type(hosts) ->
fun (L) -> lists:map(fun iolist_to_binary/1, L) end;
mod_opt_type(matches) ->
fun (infinity) -> infinity;
(I) when is_integer(I), I > 0 -> I
end;
mod_opt_type(search) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(O) when O == cache_life_time; O == cache_size ->
fun (I) when is_integer(I), I > 0 -> I;
(infinity) -> infinity
end;
mod_opt_type(O) when O == use_cache; O == cache_missed ->
fun (B) when is_boolean(B) -> B end.
mod_options(Host) ->
[{allow_return_all, false},
{host, <<"vjud.@HOST@">>},
{hosts, []},
{matches, 30},
{search, false},
{name, ?T("vCard User Search")},
{db_type, ejabberd_config:default_db(Host, ?MODULE)},
{use_cache, ejabberd_config:use_cache(Host)},
{cache_size, ejabberd_config:cache_size(Host)},
{cache_missed, ejabberd_config:cache_missed(Host)},
{cache_life_time, ejabberd_config:cache_life_time(Host)}].
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