mirror of
https://github.com/processone/ejabberd.git
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99 lines
2.8 KiB
Erlang
99 lines
2.8 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%% @copyright (C) 2017, Evgeny Khramtsov
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%%% @doc
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%%%
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%%% @end
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%%% Created : 28 Mar 2017 by Evgeny Khramtsov <ekhramtsov@process-one.net>
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%%%-------------------------------------------------------------------
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-module(mod_bosh_sql).
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-behaviour(mod_bosh).
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-compile([{parse_transform, ejabberd_sql_pt}]).
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%% API
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-export([init/0, open_session/2, close_session/1, find_session/1]).
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-include("ejabberd.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() ->
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Node = erlang:atom_to_binary(node(), latin1),
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?INFO_MSG("Cleaning SQL 'bosh' table...", []),
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case ejabberd_sql:sql_query(
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?MYNAME, ?SQL("delete from bosh where node=%(Node)s")) of
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{updated, _} ->
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ok;
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Err ->
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?ERROR_MSG("failed to clean 'route' table: ~p", [Err]),
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Err
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end.
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open_session(SID, Pid) ->
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PidS = enc_pid(Pid),
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Node = erlang:atom_to_binary(node(Pid), latin1),
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case ?SQL_UPSERT(?MYNAME, "bosh",
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["!sid=%(SID)s",
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"node=%(Node)s",
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"pid=%(PidS)s"]) of
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ok ->
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ok;
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Err ->
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?ERROR_MSG("failed to update 'bosh' table: ~p", [Err]),
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{error, Err}
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end.
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close_session(SID) ->
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%% TODO: report errors
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ejabberd_sql:sql_query(
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?MYNAME, ?SQL("delete from bosh where sid=%(SID)s")).
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find_session(SID) ->
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case ejabberd_sql:sql_query(
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?MYNAME,
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?SQL("select @(pid)s, @(node)s from bosh where sid=%(SID)s")) of
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{selected, [{Pid, Node}]} ->
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try {ok, dec_pid(Pid, Node)}
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catch _:{node_down, _} -> error
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end;
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{selected, []} ->
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error;
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Err ->
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?ERROR_MSG("failed to select 'bosh' table: ~p", [Err]),
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error
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end.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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-spec enc_pid(pid()) -> binary().
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enc_pid(Pid) ->
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list_to_binary(erlang:pid_to_list(Pid)).
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-spec dec_pid(binary(), binary()) -> pid().
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dec_pid(PidBin, NodeBin) ->
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PidStr = binary_to_list(PidBin),
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Pid = erlang:list_to_pid(PidStr),
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case erlang:binary_to_atom(NodeBin, latin1) of
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Node when Node == node() ->
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Pid;
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Node ->
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try set_node_id(PidStr, NodeBin)
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catch _:badarg ->
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erlang:error({node_down, Node})
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end
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end.
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-spec set_node_id(string(), binary()) -> pid().
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set_node_id(PidStr, NodeBin) ->
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ExtPidStr = erlang:pid_to_list(
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binary_to_term(
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<<131,103,100,(size(NodeBin)):16,NodeBin/binary,0:72>>)),
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[H|_] = string:tokens(ExtPidStr, "."),
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[_|T] = string:tokens(PidStr, "."),
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erlang:list_to_pid(string:join([H|T], ".")).
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