mirror of
https://github.com/processone/ejabberd.git
synced 2024-11-22 16:20:52 +01:00
322 lines
12 KiB
Erlang
322 lines
12 KiB
Erlang
%%%----------------------------------------------------------------------
|
|
%%% File : ejabberd_websocket.erl
|
|
%%% Author : Eric Cestari <ecestari@process-one.net>
|
|
%%% Purpose : XMPP Websocket support
|
|
%%% Created : 09-10-2010 by Eric Cestari <ecestari@process-one.net>
|
|
%%%
|
|
%%%
|
|
%%% ejabberd, Copyright (C) 2002-2024 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(ejabberd_http_ws).
|
|
-author('ecestari@process-one.net').
|
|
-behaviour(xmpp_socket).
|
|
-behaviour(p1_fsm).
|
|
|
|
-export([start/1, start_link/1, init/1, handle_event/3,
|
|
handle_sync_event/4, code_change/4, handle_info/3,
|
|
terminate/3, send_xml/2, setopts/2, sockname/1,
|
|
peername/1, controlling_process/2, get_owner/1,
|
|
reset_stream/1, close/1, change_shaper/2,
|
|
socket_handoff/3, get_transport/1]).
|
|
|
|
-include("logger.hrl").
|
|
|
|
-include_lib("xmpp/include/xmpp.hrl").
|
|
|
|
-include("ejabberd_http.hrl").
|
|
|
|
-record(state,
|
|
{socket :: ws_socket(),
|
|
ping_interval :: non_neg_integer(),
|
|
ping_timer = make_ref() :: reference(),
|
|
pong_expected = false :: boolean(),
|
|
timeout :: non_neg_integer(),
|
|
timer = make_ref() :: reference(),
|
|
input = [] :: list(),
|
|
active = false :: boolean(),
|
|
c2s_pid :: pid(),
|
|
ws :: {#ws{}, pid()}}).
|
|
|
|
%-define(DBGFSM, true).
|
|
|
|
-ifdef(DBGFSM).
|
|
|
|
-define(FSMOPTS, [{debug, [trace]}]).
|
|
|
|
-else.
|
|
|
|
-define(FSMOPTS, []).
|
|
|
|
-endif.
|
|
|
|
-type ws_socket() :: {http_ws, pid(), {inet:ip_address(), inet:port_number()}}.
|
|
-export_type([ws_socket/0]).
|
|
|
|
start(WS) ->
|
|
p1_fsm:start(?MODULE, [WS], ?FSMOPTS).
|
|
|
|
start_link(WS) ->
|
|
p1_fsm:start_link(?MODULE, [WS], ?FSMOPTS).
|
|
|
|
send_xml({http_ws, FsmRef, _IP}, Packet) ->
|
|
case catch p1_fsm:sync_send_all_state_event(FsmRef,
|
|
{send_xml, Packet},
|
|
15000)
|
|
of
|
|
{'EXIT', {timeout, _}} -> {error, timeout};
|
|
{'EXIT', _} -> {error, einval};
|
|
Res -> Res
|
|
end.
|
|
|
|
setopts({http_ws, FsmRef, _IP}, Opts) ->
|
|
case lists:member({active, once}, Opts) of
|
|
true ->
|
|
p1_fsm:send_all_state_event(FsmRef,
|
|
{activate, self()});
|
|
_ -> ok
|
|
end.
|
|
|
|
sockname(_Socket) -> {ok, {{0, 0, 0, 0}, 0}}.
|
|
|
|
peername({http_ws, _FsmRef, IP}) -> {ok, IP}.
|
|
|
|
controlling_process(_Socket, _Pid) -> ok.
|
|
|
|
close({http_ws, FsmRef, _IP}) ->
|
|
catch p1_fsm:sync_send_all_state_event(FsmRef, close).
|
|
|
|
reset_stream({http_ws, _FsmRef, _IP} = Socket) ->
|
|
Socket.
|
|
|
|
change_shaper({http_ws, FsmRef, _IP}, Shaper) ->
|
|
p1_fsm:send_all_state_event(FsmRef, {new_shaper, Shaper}).
|
|
|
|
get_transport(_Socket) ->
|
|
websocket.
|
|
|
|
get_owner({http_ws, FsmRef, _IP}) ->
|
|
FsmRef.
|
|
|
|
socket_handoff(LocalPath, Request, Opts) ->
|
|
ejabberd_websocket:socket_handoff(LocalPath, Request, Opts, ?MODULE, fun get_human_html_xmlel/0).
|
|
|
|
%%% Internal
|
|
|
|
init([{#ws{ip = IP, http_opts = HOpts}, _} = WS]) ->
|
|
SOpts = lists:filtermap(fun({stream_management, _}) -> true;
|
|
({max_ack_queue, _}) -> true;
|
|
({ack_timeout, _}) -> true;
|
|
({resume_timeout, _}) -> true;
|
|
({max_resume_timeout, _}) -> true;
|
|
({resend_on_timeout, _}) -> true;
|
|
({access, _}) -> true;
|
|
(_) -> false
|
|
end, HOpts),
|
|
Opts = ejabberd_c2s_config:get_c2s_limits() ++ SOpts,
|
|
PingInterval = ejabberd_option:websocket_ping_interval(),
|
|
WSTimeout = ejabberd_option:websocket_timeout(),
|
|
Socket = {http_ws, self(), IP},
|
|
?DEBUG("Client connected through websocket ~p",
|
|
[Socket]),
|
|
case ejabberd_c2s:start(?MODULE, Socket, [{receiver, self()}|Opts]) of
|
|
{ok, C2SPid} ->
|
|
ejabberd_c2s:accept(C2SPid),
|
|
Timer = erlang:start_timer(WSTimeout, self(), []),
|
|
{ok, loop,
|
|
#state{socket = Socket, timeout = WSTimeout,
|
|
timer = Timer, ws = WS, c2s_pid = C2SPid,
|
|
ping_interval = PingInterval}};
|
|
{error, Reason} ->
|
|
{stop, Reason};
|
|
ignore ->
|
|
ignore
|
|
end.
|
|
|
|
handle_event({activate, From}, StateName, State) ->
|
|
State1 = case State#state.input of
|
|
[] -> State#state{active = true};
|
|
Input ->
|
|
lists:foreach(
|
|
fun(I) when is_binary(I)->
|
|
From ! {tcp, State#state.socket, I};
|
|
(I2) ->
|
|
From ! {tcp, State#state.socket, [I2]}
|
|
end, Input),
|
|
State#state{active = false, input = []}
|
|
end,
|
|
{next_state, StateName, State1#state{c2s_pid = From}};
|
|
handle_event({new_shaper, Shaper}, StateName, #state{ws = {_, WsPid}} = StateData) ->
|
|
WsPid ! {new_shaper, Shaper},
|
|
{next_state, StateName, StateData}.
|
|
|
|
handle_sync_event({send_xml, Packet}, _From, StateName,
|
|
#state{ws = {_, WsPid}} = StateData) ->
|
|
SN2 = case Packet of
|
|
{xmlstreamstart, _, Attrs} ->
|
|
Attrs2 = [{<<"xmlns">>, <<"urn:ietf:params:xml:ns:xmpp-framing">>} |
|
|
lists:keydelete(<<"xmlns">>, 1, lists:keydelete(<<"xmlns:stream">>, 1, Attrs))],
|
|
route_el(WsPid, #xmlel{name = <<"open">>, attrs = Attrs2}),
|
|
StateName;
|
|
{xmlstreamend, _} ->
|
|
route_el(WsPid, #xmlel{name = <<"close">>,
|
|
attrs = [{<<"xmlns">>, <<"urn:ietf:params:xml:ns:xmpp-framing">>}]}),
|
|
stream_end_sent;
|
|
{xmlstreamraw, <<"\r\n\r\n">>} ->
|
|
% cdata ping
|
|
StateName;
|
|
{xmlstreamelement, #xmlel{name = Name2} = El2} ->
|
|
El3 = case Name2 of
|
|
<<"stream:", _/binary>> ->
|
|
fxml:replace_tag_attr(<<"xmlns:stream">>, ?NS_STREAM, El2);
|
|
_ ->
|
|
case fxml:get_tag_attr_s(<<"xmlns">>, El2) of
|
|
<<"">> ->
|
|
fxml:replace_tag_attr(<<"xmlns">>, <<"jabber:client">>, El2);
|
|
_ ->
|
|
El2
|
|
end
|
|
end,
|
|
route_el(WsPid, El3),
|
|
StateName
|
|
end,
|
|
{reply, ok, SN2, StateData};
|
|
handle_sync_event(close, _From, StateName, #state{ws = {_, WsPid}} = StateData)
|
|
when StateName /= stream_end_sent ->
|
|
Close = #xmlel{name = <<"close">>,
|
|
attrs = [{<<"xmlns">>, <<"urn:ietf:params:xml:ns:xmpp-framing">>}]},
|
|
route_text(WsPid, fxml:element_to_binary(Close)),
|
|
{stop, normal, StateData};
|
|
handle_sync_event(close, _From, _StateName, StateData) ->
|
|
{stop, normal, StateData}.
|
|
|
|
handle_info(closed, _StateName, StateData) ->
|
|
{stop, normal, StateData};
|
|
handle_info({received, Packet}, StateName, StateDataI) ->
|
|
{StateData, Parsed} = parse(StateDataI, Packet),
|
|
SD = case StateData#state.active of
|
|
false ->
|
|
Input = StateData#state.input ++ Parsed,
|
|
StateData#state{input = Input};
|
|
true ->
|
|
StateData#state.c2s_pid ! {tcp, StateData#state.socket, Parsed},
|
|
setup_timers(StateData#state{active = false})
|
|
end,
|
|
{next_state, StateName, SD};
|
|
handle_info(PingPong, StateName, StateData) when PingPong == ping orelse
|
|
PingPong == pong ->
|
|
StateData2 = setup_timers(StateData),
|
|
{next_state, StateName,
|
|
StateData2#state{pong_expected = false}};
|
|
handle_info({timeout, Timer, _}, _StateName,
|
|
#state{timer = Timer} = StateData) ->
|
|
?DEBUG("Closing websocket connection from hitting inactivity timeout", []),
|
|
{stop, normal, StateData};
|
|
handle_info({timeout, Timer, _}, StateName,
|
|
#state{ping_timer = Timer, ws = {_, WsPid}} = StateData) ->
|
|
case StateData#state.pong_expected of
|
|
false ->
|
|
misc:cancel_timer(StateData#state.ping_timer),
|
|
PingTimer = erlang:start_timer(StateData#state.ping_interval,
|
|
self(), []),
|
|
WsPid ! {ping, <<>>},
|
|
{next_state, StateName,
|
|
StateData#state{ping_timer = PingTimer, pong_expected = true}};
|
|
true ->
|
|
?DEBUG("Closing websocket connection from missing pongs", []),
|
|
{stop, normal, StateData}
|
|
end;
|
|
handle_info(_, StateName, StateData) ->
|
|
{next_state, StateName, StateData}.
|
|
|
|
code_change(_OldVsn, StateName, StateData, _Extra) ->
|
|
{ok, StateName, StateData}.
|
|
|
|
terminate(_Reason, _StateName, StateData) ->
|
|
StateData#state.c2s_pid ! {tcp_closed, StateData#state.socket}.
|
|
|
|
setup_timers(StateData) ->
|
|
misc:cancel_timer(StateData#state.timer),
|
|
Timer = erlang:start_timer(StateData#state.timeout,
|
|
self(), []),
|
|
misc:cancel_timer(StateData#state.ping_timer),
|
|
PingTimer = case StateData#state.ping_interval of
|
|
0 -> StateData#state.ping_timer;
|
|
V -> erlang:start_timer(V, self(), [])
|
|
end,
|
|
StateData#state{timer = Timer, ping_timer = PingTimer,
|
|
pong_expected = false}.
|
|
|
|
get_human_html_xmlel() ->
|
|
Heading = <<"ejabberd ", (misc:atom_to_binary(?MODULE))/binary>>,
|
|
#xmlel{name = <<"html">>,
|
|
attrs =
|
|
[{<<"xmlns">>, <<"http://www.w3.org/1999/xhtml">>}],
|
|
children =
|
|
[#xmlel{name = <<"head">>, attrs = [],
|
|
children =
|
|
[#xmlel{name = <<"title">>, attrs = [],
|
|
children = [{xmlcdata, Heading}]}]},
|
|
#xmlel{name = <<"body">>, attrs = [],
|
|
children =
|
|
[#xmlel{name = <<"h1">>, attrs = [],
|
|
children = [{xmlcdata, Heading}]},
|
|
#xmlel{name = <<"p">>, attrs = [],
|
|
children =
|
|
[{xmlcdata, <<"An implementation of ">>},
|
|
#xmlel{name = <<"a">>,
|
|
attrs =
|
|
[{<<"href">>,
|
|
<<"http://tools.ietf.org/html/rfc6455">>}],
|
|
children =
|
|
[{xmlcdata,
|
|
<<"WebSocket protocol">>}]}]},
|
|
#xmlel{name = <<"p">>, attrs = [],
|
|
children =
|
|
[{xmlcdata,
|
|
<<"This web page is only informative. To "
|
|
"use WebSocket connection you need a Jabber/XMPP "
|
|
"client that supports it.">>}]}]}]}.
|
|
|
|
|
|
parse(State, Data) ->
|
|
El = fxml_stream:parse_element(Data),
|
|
case El of
|
|
#xmlel{name = <<"open">>, attrs = Attrs} ->
|
|
Attrs2 = [{<<"xmlns:stream">>, ?NS_STREAM}, {<<"xmlns">>, <<"jabber:client">>} |
|
|
lists:keydelete(<<"xmlns">>, 1, lists:keydelete(<<"xmlns:stream">>, 1, Attrs))],
|
|
{State, [{xmlstreamstart, <<"stream:stream">>, Attrs2}]};
|
|
#xmlel{name = <<"close">>} ->
|
|
{State, [{xmlstreamend, <<"stream:stream">>}]};
|
|
{error, _} ->
|
|
{State, [{xmlstreamerror, {4, <<"not well-formed">>}}]};
|
|
_ ->
|
|
{State, [El]}
|
|
end.
|
|
|
|
-spec route_text(pid(), binary()) -> ok.
|
|
route_text(Pid, Data) ->
|
|
Pid ! {text_with_reply, Data, self()},
|
|
receive
|
|
{text_reply, Pid} ->
|
|
ok
|
|
end.
|
|
|
|
-spec route_el(pid(), xmlel() | cdata()) -> ok.
|
|
route_el(Pid, Data) ->
|
|
route_text(Pid, fxml:element_to_binary(Data)).
|