mirror of
https://github.com/processone/ejabberd.git
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392 lines
12 KiB
Erlang
392 lines
12 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% File : mod_mam_sql.erl
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%%% Author : Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% Created : 15 Apr 2016 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2017 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(mod_mam_sql).
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-compile([{parse_transform, ejabberd_sql_pt}]).
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-behaviour(mod_mam).
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%% API
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-export([init/2, remove_user/2, remove_room/3, delete_old_messages/3,
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extended_fields/0, store/7, write_prefs/4, get_prefs/2, select/6, export/1]).
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-include_lib("stdlib/include/ms_transform.hrl").
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-include("xmpp.hrl").
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-include("mod_mam.hrl").
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-include("logger.hrl").
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-include("ejabberd_sql_pt.hrl").
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%%%===================================================================
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%%% API
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%%%===================================================================
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init(_Host, _Opts) ->
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ok.
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remove_user(LUser, LServer) ->
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ejabberd_sql:sql_query(
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LServer,
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?SQL("delete from archive where username=%(LUser)s")),
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ejabberd_sql:sql_query(
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LServer,
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?SQL("delete from archive_prefs where username=%(LUser)s")).
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remove_room(LServer, LName, LHost) ->
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LUser = jid:encode({LName, LHost, <<>>}),
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remove_user(LUser, LServer).
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delete_old_messages(ServerHost, TimeStamp, Type) ->
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TypeClause = if Type == all -> <<"">>;
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true -> [<<" and kind='">>, misc:atom_to_binary(Type), <<"'">>]
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end,
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TS = integer_to_binary(now_to_usec(TimeStamp)),
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ejabberd_sql:sql_query(
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ServerHost, [<<"delete from archive where timestamp<">>,
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TS, TypeClause, <<";">>]),
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ok.
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extended_fields() ->
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[{withtext, <<"">>}].
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store(Pkt, LServer, {LUser, LHost}, Type, Peer, Nick, _Dir) ->
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TSinteger = p1_time_compat:system_time(micro_seconds),
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ID = integer_to_binary(TSinteger),
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SUser = case Type of
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chat -> LUser;
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groupchat -> jid:encode({LUser, LHost, <<>>})
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end,
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BarePeer = jid:encode(
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jid:tolower(
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jid:remove_resource(Peer))),
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LPeer = jid:encode(
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jid:tolower(Peer)),
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XML = fxml:element_to_binary(Pkt),
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Body = fxml:get_subtag_cdata(Pkt, <<"body">>),
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SType = misc:atom_to_binary(Type),
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case ejabberd_sql:sql_query(
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LServer,
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?SQL("insert into archive (username, timestamp,"
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" peer, bare_peer, xml, txt, kind, nick) values ("
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"%(SUser)s, "
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"%(TSinteger)d, "
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"%(LPeer)s, "
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"%(BarePeer)s, "
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"%(XML)s, "
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"%(Body)s, "
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"%(SType)s, "
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"%(Nick)s)")) of
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{updated, _} ->
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{ok, ID};
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Err ->
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Err
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end.
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write_prefs(LUser, _LServer, #archive_prefs{default = Default,
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never = Never,
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always = Always},
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ServerHost) ->
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SDefault = erlang:atom_to_binary(Default, utf8),
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SAlways = misc:term_to_expr(Always),
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SNever = misc:term_to_expr(Never),
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case ?SQL_UPSERT(
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ServerHost,
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"archive_prefs",
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["!username=%(LUser)s",
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"def=%(SDefault)s",
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"always=%(SAlways)s",
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"never=%(SNever)s"]) of
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ok ->
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ok;
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Err ->
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Err
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end.
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get_prefs(LUser, LServer) ->
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case ejabberd_sql:sql_query(
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LServer,
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?SQL("select @(def)s, @(always)s, @(never)s from archive_prefs"
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" where username=%(LUser)s")) of
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{selected, [{SDefault, SAlways, SNever}]} ->
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Default = erlang:binary_to_existing_atom(SDefault, utf8),
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Always = ejabberd_sql:decode_term(SAlways),
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Never = ejabberd_sql:decode_term(SNever),
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{ok, #archive_prefs{us = {LUser, LServer},
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default = Default,
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always = Always,
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never = Never}};
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_ ->
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error
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end.
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select(LServer, JidRequestor, #jid{luser = LUser} = JidArchive,
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MAMQuery, RSM, MsgType) ->
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User = case MsgType of
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chat -> LUser;
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{groupchat, _Role, _MUCState} -> jid:encode(JidArchive)
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end,
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{Query, CountQuery} = make_sql_query(User, LServer, MAMQuery, RSM),
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% TODO from XEP-0313 v0.2: "To conserve resources, a server MAY place a
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% reasonable limit on how many stanzas may be pushed to a client in one
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% request. If a query returns a number of stanzas greater than this limit
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% and the client did not specify a limit using RSM then the server should
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% return a policy-violation error to the client." We currently don't do this
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% for v0.2 requests, but we do limit #rsm_in.max for v0.3 and newer.
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case {ejabberd_sql:sql_query(LServer, Query),
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ejabberd_sql:sql_query(LServer, CountQuery)} of
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{{selected, _, Res}, {selected, _, [[Count]]}} ->
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{Max, Direction, _} = get_max_direction_id(RSM),
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{Res1, IsComplete} =
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if Max >= 0 andalso Max /= undefined andalso length(Res) > Max ->
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if Direction == before ->
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{lists:nthtail(1, Res), false};
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true ->
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{lists:sublist(Res, Max), false}
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end;
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true ->
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{Res, true}
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end,
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{lists:flatmap(
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fun([TS, XML, PeerBin, Kind, Nick]) ->
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case make_archive_el(
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TS, XML, PeerBin, Kind, Nick,
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MsgType, JidRequestor, JidArchive) of
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{ok, El} ->
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[{TS, binary_to_integer(TS), El}];
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{error, _} ->
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[]
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end
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end, Res1), IsComplete, binary_to_integer(Count)};
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_ ->
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{[], false, 0}
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end.
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export(_Server) ->
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[{archive_prefs,
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fun(Host, #archive_prefs{us =
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{LUser, LServer},
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default = Default,
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always = Always,
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never = Never})
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when LServer == Host ->
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SDefault = erlang:atom_to_binary(Default, utf8),
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SAlways = misc:term_to_expr(Always),
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SNever = misc:term_to_expr(Never),
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[?SQL("insert into archive_prefs (username, def, always, never) values"
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"(%(LUser)s, %(SDefault)s, %(SAlways)s, %(SNever)s);")];
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(_Host, _R) ->
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[]
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end},
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{archive_msg,
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fun(Host, #archive_msg{us ={LUser, LServer},
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id = _ID, timestamp = TS, peer = Peer,
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type = Type, nick = Nick, packet = Pkt})
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when LServer == Host ->
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TStmp = now_to_usec(TS),
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SUser = case Type of
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chat -> LUser;
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groupchat -> jid:encode({LUser, LServer, <<>>})
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end,
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BarePeer = jid:encode(jid:tolower(jid:remove_resource(Peer))),
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LPeer = jid:encode(jid:tolower(Peer)),
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XML = fxml:element_to_binary(Pkt),
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Body = fxml:get_subtag_cdata(Pkt, <<"body">>),
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SType = misc:atom_to_binary(Type),
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[?SQL("insert into archive (username, timestamp, "
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"peer, bare_peer, xml, txt, kind, nick) "
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"values (%(SUser)s, %(TStmp)d, %(LPeer)s, "
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"%(BarePeer)s, %(XML)s, %(Body)s, %(SType)s, "
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"%(Nick)s);")];
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(_Host, _R) ->
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[]
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end}].
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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now_to_usec({MSec, Sec, USec}) ->
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(MSec*1000000 + Sec)*1000000 + USec.
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usec_to_now(Int) ->
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Secs = Int div 1000000,
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USec = Int rem 1000000,
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MSec = Secs div 1000000,
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Sec = Secs rem 1000000,
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{MSec, Sec, USec}.
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make_sql_query(User, LServer, MAMQuery, RSM) ->
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Start = proplists:get_value(start, MAMQuery),
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End = proplists:get_value('end', MAMQuery),
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With = proplists:get_value(with, MAMQuery),
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WithText = proplists:get_value(withtext, MAMQuery),
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{Max, Direction, ID} = get_max_direction_id(RSM),
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ODBCType = ejabberd_config:get_option({sql_type, LServer}),
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Escape =
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case ODBCType of
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mssql -> fun ejabberd_sql:standard_escape/1;
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sqlite -> fun ejabberd_sql:standard_escape/1;
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_ -> fun ejabberd_sql:escape/1
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end,
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LimitClause = if is_integer(Max), Max >= 0, ODBCType /= mssql ->
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[<<" limit ">>, integer_to_binary(Max+1)];
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true ->
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[]
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end,
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TopClause = if is_integer(Max), Max >= 0, ODBCType == mssql ->
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[<<" TOP ">>, integer_to_binary(Max+1)];
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true ->
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[]
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end,
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WithTextClause = if is_binary(WithText), WithText /= <<>> ->
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[<<" and match (txt) against ('">>,
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Escape(WithText), <<"')">>];
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true ->
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[]
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end,
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WithClause = case catch jid:tolower(With) of
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{_, _, <<>>} ->
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[<<" and bare_peer='">>,
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Escape(jid:encode(With)),
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<<"'">>];
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{_, _, _} ->
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[<<" and peer='">>,
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Escape(jid:encode(With)),
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<<"'">>];
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_ ->
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[]
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end,
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PageClause = case catch binary_to_integer(ID) of
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I when is_integer(I), I >= 0 ->
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case Direction of
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before ->
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[<<" AND timestamp < ">>, ID];
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'after' ->
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[<<" AND timestamp > ">>, ID];
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_ ->
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[]
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end;
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_ ->
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[]
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end,
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StartClause = case Start of
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{_, _, _} ->
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[<<" and timestamp >= ">>,
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integer_to_binary(now_to_usec(Start))];
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_ ->
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[]
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end,
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EndClause = case End of
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{_, _, _} ->
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[<<" and timestamp <= ">>,
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integer_to_binary(now_to_usec(End))];
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_ ->
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[]
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end,
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SUser = Escape(User),
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Query = [<<"SELECT ">>, TopClause, <<" timestamp, xml, peer, kind, nick"
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" FROM archive WHERE username='">>,
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SUser, <<"'">>, WithClause, WithTextClause, StartClause, EndClause,
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PageClause],
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QueryPage =
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case Direction of
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before ->
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% ID can be empty because of
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% XEP-0059: Result Set Management
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% 2.5 Requesting the Last Page in a Result Set
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[<<"SELECT timestamp, xml, peer, kind, nick FROM (">>, Query,
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<<" ORDER BY timestamp DESC ">>,
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LimitClause, <<") AS t ORDER BY timestamp ASC;">>];
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_ ->
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[Query, <<" ORDER BY timestamp ASC ">>,
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LimitClause, <<";">>]
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end,
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{QueryPage,
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[<<"SELECT COUNT(*) FROM archive WHERE username='">>,
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SUser, <<"'">>, WithClause, WithTextClause, StartClause, EndClause, <<";">>]}.
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-spec get_max_direction_id(rsm_set() | undefined) ->
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{integer() | undefined,
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before | 'after' | undefined,
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binary()}.
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get_max_direction_id(RSM) ->
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case RSM of
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#rsm_set{max = Max, before = Before} when is_binary(Before) ->
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{Max, before, Before};
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#rsm_set{max = Max, 'after' = After} when is_binary(After) ->
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{Max, 'after', After};
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#rsm_set{max = Max} ->
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{Max, undefined, <<>>};
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_ ->
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{undefined, undefined, <<>>}
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end.
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-spec make_archive_el(binary(), binary(), binary(), binary(),
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binary(), _, jid(), jid()) ->
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{ok, xmpp_element()} | {error, invalid_jid |
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invalid_timestamp |
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invalid_xml}.
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make_archive_el(TS, XML, Peer, Kind, Nick, MsgType, JidRequestor, JidArchive) ->
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case fxml_stream:parse_element(XML) of
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#xmlel{} = El ->
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try binary_to_integer(TS) of
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TSInt ->
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try jid:decode(Peer) of
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PeerJID ->
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Now = usec_to_now(TSInt),
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PeerLJID = jid:tolower(PeerJID),
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T = case Kind of
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<<"">> -> chat;
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null -> chat;
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_ -> misc:binary_to_atom(Kind)
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end,
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mod_mam:msg_to_el(
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#archive_msg{timestamp = Now,
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id = TS,
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packet = El,
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type = T,
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nick = Nick,
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peer = PeerLJID},
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MsgType, JidRequestor, JidArchive)
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catch _:{bad_jid, _} ->
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?ERROR_MSG("Malformed 'peer' field with value "
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"'~s' detected for user ~s in table "
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"'archive': invalid JID",
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[Peer, jid:encode(JidArchive)]),
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{error, invalid_jid}
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end
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catch _:_ ->
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?ERROR_MSG("Malformed 'timestamp' field with value '~s' "
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"detected for user ~s in table 'archive': "
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"not an integer",
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[TS, jid:encode(JidArchive)]),
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{error, invalid_timestamp}
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end;
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{error, {_, Reason}} ->
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?ERROR_MSG("Malformed 'xml' field with value '~s' detected "
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"for user ~s in table 'archive': ~s",
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[XML, jid:encode(JidArchive), Reason]),
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{error, invalid_xml}
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end.
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