mirror of
https://github.com/processone/ejabberd.git
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293 lines
9.4 KiB
Erlang
293 lines
9.4 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_private.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Support for private storage.
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%%% Created : 16 Jan 2003 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2013 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_private).
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-author('alexey@process-one.net').
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-behaviour(gen_mod).
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-export([start/2, stop/1, process_sm_iq/3, import/3,
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remove_user/2, get_data/2, export/1, import/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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-record(private_storage,
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{usns = {<<"">>, <<"">>, <<"">>} :: {binary(), binary(), binary() |
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'$1' | '_'},
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xml = #xmlel{} :: xmlel() | '_' | '$1'}).
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-define(Xmlel_Query(Attrs, Children),
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#xmlel{name = <<"query">>, attrs = Attrs,
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children = Children}).
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start(Host, Opts) ->
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IQDisc = gen_mod:get_opt(iqdisc, Opts, fun gen_iq_handler:check_type/1,
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one_queue),
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case gen_mod:db_type(Opts) of
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mnesia ->
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mnesia:create_table(private_storage,
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[{disc_only_copies, [node()]},
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{attributes,
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record_info(fields, private_storage)}]),
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update_table();
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_ -> ok
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end,
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ejabberd_hooks:add(remove_user, Host, ?MODULE,
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remove_user, 50),
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gen_iq_handler:add_iq_handler(ejabberd_sm, Host,
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?NS_PRIVATE, ?MODULE, process_sm_iq, IQDisc).
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stop(Host) ->
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ejabberd_hooks:delete(remove_user, Host, ?MODULE,
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remove_user, 50),
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gen_iq_handler:remove_iq_handler(ejabberd_sm, Host,
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?NS_PRIVATE).
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process_sm_iq(#jid{luser = LUser, lserver = LServer},
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#jid{luser = LUser, lserver = LServer}, IQ)
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when IQ#iq.type == set ->
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case IQ#iq.sub_el of
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#xmlel{name = <<"query">>, children = Xmlels} ->
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case filter_xmlels(Xmlels) of
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[] ->
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IQ#iq{type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_NOT_ACCEPTABLE]};
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Data ->
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DBType = gen_mod:db_type(LServer, ?MODULE),
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F = fun () ->
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lists:foreach(fun (Datum) ->
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set_data(LUser, LServer,
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Datum, DBType)
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end,
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Data)
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end,
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case DBType of
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odbc -> ejabberd_odbc:sql_transaction(LServer, F);
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mnesia -> mnesia:transaction(F)
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end,
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IQ#iq{type = result, sub_el = []}
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end;
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_ ->
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IQ#iq{type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_NOT_ACCEPTABLE]}
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end;
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%%
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process_sm_iq(#jid{luser = LUser, lserver = LServer},
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#jid{luser = LUser, lserver = LServer}, IQ)
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when IQ#iq.type == get ->
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case IQ#iq.sub_el of
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#xmlel{name = <<"query">>, attrs = Attrs,
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children = Xmlels} ->
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case filter_xmlels(Xmlels) of
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[] ->
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IQ#iq{type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_BAD_FORMAT]};
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Data ->
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case catch get_data(LUser, LServer, Data) of
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{'EXIT', _Reason} ->
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IQ#iq{type = error,
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sub_el =
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[IQ#iq.sub_el, ?ERR_INTERNAL_SERVER_ERROR]};
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Storage_Xmlels ->
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IQ#iq{type = result,
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sub_el = [?Xmlel_Query(Attrs, Storage_Xmlels)]}
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end
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end;
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_ ->
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IQ#iq{type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_BAD_FORMAT]}
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end;
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%%
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process_sm_iq(_From, _To, IQ) ->
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IQ#iq{type = error,
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sub_el = [IQ#iq.sub_el, ?ERR_FORBIDDEN]}.
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filter_xmlels(Xmlels) -> filter_xmlels(Xmlels, []).
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filter_xmlels([], Data) -> lists:reverse(Data);
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filter_xmlels([#xmlel{attrs = Attrs} = Xmlel | Xmlels],
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Data) ->
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case xml:get_attr_s(<<"xmlns">>, Attrs) of
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<<"">> -> [];
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XmlNS -> filter_xmlels(Xmlels, [{XmlNS, Xmlel} | Data])
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end;
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filter_xmlels([_ | Xmlels], Data) ->
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filter_xmlels(Xmlels, Data).
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set_data(LUser, LServer, {XmlNS, Xmlel}, mnesia) ->
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mnesia:write(#private_storage{usns =
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{LUser, LServer, XmlNS},
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xml = Xmlel});
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set_data(LUser, LServer, {XMLNS, El}, odbc) ->
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Username = ejabberd_odbc:escape(LUser),
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LXMLNS = ejabberd_odbc:escape(XMLNS),
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SData = ejabberd_odbc:escape(xml:element_to_binary(El)),
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odbc_queries:set_private_data(LServer, Username, LXMLNS,
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SData).
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get_data(LUser, LServer, Data) ->
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get_data(LUser, LServer,
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gen_mod:db_type(LServer, ?MODULE), Data, []).
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get_data(_LUser, _LServer, _DBType, [],
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Storage_Xmlels) ->
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lists:reverse(Storage_Xmlels);
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get_data(LUser, LServer, mnesia,
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[{XmlNS, Xmlel} | Data], Storage_Xmlels) ->
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case mnesia:dirty_read(private_storage,
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{LUser, LServer, XmlNS})
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of
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[#private_storage{xml = Storage_Xmlel}] ->
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get_data(LUser, LServer, mnesia, Data,
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[Storage_Xmlel | Storage_Xmlels]);
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_ ->
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get_data(LUser, LServer, mnesia, Data,
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[Xmlel | Storage_Xmlels])
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end;
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get_data(LUser, LServer, odbc, [{XMLNS, El} | Els],
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Res) ->
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Username = ejabberd_odbc:escape(LUser),
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LXMLNS = ejabberd_odbc:escape(XMLNS),
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case catch odbc_queries:get_private_data(LServer,
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Username, LXMLNS)
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of
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{selected, [<<"data">>], [[SData]]} ->
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case xml_stream:parse_element(SData) of
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Data when is_record(Data, xmlel) ->
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get_data(LUser, LServer, odbc, Els, [Data | Res])
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end;
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%% MREMOND: I wonder when the query could return a vcard ?
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{selected, [<<"vcard">>], []} ->
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get_data(LUser, LServer, odbc, Els, [El | Res]);
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_ -> get_data(LUser, LServer, odbc, Els, [El | Res])
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end.
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get_data(LUser, LServer) ->
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get_all_data(LUser, LServer,
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gen_mod:db_type(LServer, ?MODULE)).
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get_all_data(LUser, LServer, mnesia) ->
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lists:flatten(
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mnesia:dirty_select(private_storage,
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[{#private_storage{usns = {LUser, LServer, '_'},
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xml = '$1'},
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[], ['$1']}]));
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get_all_data(LUser, LServer, odbc) ->
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Username = ejabberd_odbc:escape(LUser),
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case catch odbc_queries:get_private_data(LServer, Username) of
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{selected, [<<"namespace">>, <<"data">>], Res} ->
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lists:flatmap(
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fun([_, SData]) ->
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case xml_stream:parse_element(SData) of
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#xmlel{} = El ->
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[El];
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_ ->
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[]
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end
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end, Res);
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_ ->
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[]
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end.
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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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remove_user(LUser, LServer,
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gen_mod:db_type(Server, ?MODULE)).
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remove_user(LUser, LServer, mnesia) ->
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F = fun () ->
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Namespaces = mnesia:select(private_storage,
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[{#private_storage{usns =
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{LUser,
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LServer,
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'$1'},
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_ = '_'},
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[], ['$$']}]),
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lists:foreach(fun ([Namespace]) ->
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mnesia:delete({private_storage,
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{LUser, LServer,
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Namespace}})
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end,
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Namespaces)
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end,
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mnesia:transaction(F);
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remove_user(LUser, LServer, odbc) ->
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Username = ejabberd_odbc:escape(LUser),
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odbc_queries:del_user_private_storage(LServer,
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Username).
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update_table() ->
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Fields = record_info(fields, private_storage),
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case mnesia:table_info(private_storage, attributes) of
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Fields ->
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ejabberd_config:convert_table_to_binary(
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private_storage, Fields, set,
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fun(#private_storage{usns = {U, _, _}}) -> U end,
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fun(#private_storage{usns = {U, S, NS}, xml = El} = R) ->
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R#private_storage{usns = {iolist_to_binary(U),
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iolist_to_binary(S),
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iolist_to_binary(NS)},
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xml = xml:to_xmlel(El)}
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end);
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_ ->
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?INFO_MSG("Recreating private_storage table", []),
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mnesia:transform_table(private_storage, ignore, Fields)
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end.
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export(_Server) ->
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[{private_storage,
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fun(Host, #private_storage{usns = {LUser, LServer, XMLNS},
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xml = Data})
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when LServer == Host ->
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Username = ejabberd_odbc:escape(LUser),
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LXMLNS = ejabberd_odbc:escape(XMLNS),
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SData =
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ejabberd_odbc:escape(xml:element_to_binary(Data)),
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odbc_queries:set_private_data_sql(Username, LXMLNS,
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SData);
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(_Host, _R) ->
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[]
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end}].
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import(LServer) ->
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[{<<"select username, namespace, data from private_storage;">>,
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fun([LUser, XMLNS, XML]) ->
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El = #xmlel{} = xml_stream:parse_element(XML),
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#private_storage{usns = {LUser, LServer, XMLNS},
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xml = El}
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end}].
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import(_LServer, mnesia, #private_storage{} = PS) ->
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mnesia:dirty_write(PS);
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import(_, _, _) ->
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pass.
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