mirror of
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Initial commit of HTTP-Bind source code (thanks to Stefan Striegler)
SVN Revision: 2198
This commit is contained in:
Badlop
parent
c34999cc96
commit
bbe82647e8
804
src/web/ejabberd_http_bind.erl
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804
src/web/ejabberd_http_bind.erl
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%%%----------------------------------------------------------------------
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%%% File : ejabberd_http_bind.erl
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%%% Author : Stefan Strigler <steve@zeank.in-berlin.de>
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%%% Purpose : HTTP Binding support (JEP-0124)
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%%% Created : 21 Sep 2005 by Stefan Strigler <steve@zeank.in-berlin.de>
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%%% Id : $Id: $
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%%%----------------------------------------------------------------------
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-module(ejabberd_http_bind).
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-author('steve@zeank.in-berlin.de').
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-vsn('Revision: 1.4').
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-behaviour(gen_fsm).
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%% External exports
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-export([start_link/2,
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init/1,
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handle_event/3,
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handle_sync_event/4,
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code_change/4,
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handle_info/3,
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terminate/3,
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send/2,
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setopts/2,
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controlling_process/2,
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close/1,
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process_request/1]).
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%%-define(ejabberd_debug, true).
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-include("ejabberd.hrl").
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-include("jlib.hrl").
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-include("ejabberd_http.hrl").
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-record(http_bind, {id, pid, to, hold, wait}).
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%% http binding request
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-record(hbr, {rid,
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key,
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in,
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out}).
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-record(state, {id,
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rid = error,
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key,
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output = "",
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input = "",
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waiting_input = false,
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last_receiver,
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last_poll,
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ctime = 0,
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timer,
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req_list = [] % list of requests
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}).
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%-define(DBGFSM, true).
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-ifdef(DBGFSM).
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-define(FSMOPTS, [{debug, [trace]}]).
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-else.
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-define(FSMOPTS, []).
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-endif.
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-define(MAX_REQUESTS, 2). % number of simultaneous requests
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-define(MIN_POLLING, "2"). % don't poll faster than that or we will shoot you
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-define(MAX_WAIT, 60). % max num of secs to keep a request on hold
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-define(MAX_INACTIVITY, 30000). % msecs to wait before terminating idle sessions
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-define(CT, {"Content-Type", "text/xml; charset=utf-8"}).
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-define(BAD_REQUEST, ?CT).
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%%%----------------------------------------------------------------------
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%%% API
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%%%----------------------------------------------------------------------
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start(ID, Key) ->
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mnesia:create_table(http_bind,
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[{ram_copies, [node()]},
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{attributes, record_info(fields, http_bind)}]),
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supervisor:start_child(ejabberd_http_bind_sup, [ID, Key]).
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start_link(ID, Key) ->
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gen_fsm:start_link(?MODULE, [ID, Key], ?FSMOPTS).
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send({http_bind, FsmRef}, Packet) ->
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gen_fsm:sync_send_all_state_event(FsmRef, {send, Packet}).
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setopts({http_bind, FsmRef}, Opts) ->
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case lists:member({active, once}, Opts) of
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true ->
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gen_fsm:sync_send_all_state_event(FsmRef, activate);
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_ ->
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ok
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end.
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controlling_process(_Socket, _Pid) ->
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ok.
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close({http_bind, FsmRef}) ->
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catch gen_fsm:sync_send_all_state_event(FsmRef, close).
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process_request(#request{path = [],
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data = Data}) ->
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case catch parse_request(Data) of
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{ok, ID1, RID, Key, NewKey, Attrs, Packet} ->
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XmppDomain = xml:get_attr_s("to",Attrs),
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if
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(ID1 == "") and (XmppDomain == "") ->
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{200, [?CT], "<body type='terminate' "
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"condition='improper-addressing' "
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"xmlns='http://jabber.org/protocol/httpbind'/>"};
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true ->
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ID = if
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(ID1 == "") ->
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%% create new session
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NewID = sha:sha(term_to_binary({now(), make_ref()})),
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{ok, Pid} = start(NewID, Key),
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Wait = case
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string:to_integer(xml:get_attr_s("wait",Attrs))
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of
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{error, _} ->
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?MAX_WAIT;
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{CWait, _} ->
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if
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(CWait > ?MAX_WAIT) ->
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?MAX_WAIT;
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true ->
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CWait
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end
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end,
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Hold = case
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string:to_integer(
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xml:get_attr_s("hold",Attrs))
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of
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{error, _} ->
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(?MAX_REQUESTS - 1);
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{CHold, _} ->
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if
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(CHold > (?MAX_REQUESTS - 1)) ->
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(?MAX_REQUESTS - 1);
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true ->
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CHold
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end
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end,
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mnesia:transaction(
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fun() ->
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mnesia:write(#http_bind{id = NewID,
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pid = Pid,
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to = XmppDomain,
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wait = Wait,
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hold = Hold})
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end),
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StreamStart = if
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(XmppDomain /= "") ->
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true;
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true ->
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false
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end,
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InPacket = Packet,
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NewID;
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true ->
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%% old session
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Type = xml:get_attr_s("type",Attrs),
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StreamStart =
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case xml:get_attr_s("xmpp:restart",Attrs) of
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"true" ->
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true;
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_ ->
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false
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end,
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Wait = ?MAX_WAIT,
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Hold = (?MAX_REQUESTS - 1),
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if
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(Type == "terminate") ->
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%% terminate session
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InPacket = Packet ++ "</stream:stream>";
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true ->
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InPacket = Packet
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end,
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ID1
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end,
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%% ?DEBUG("~n InPacket: ~s ~n", [InPacket]),
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case http_put(ID, RID, Key, NewKey, Hold, InPacket, StreamStart) of
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{error, not_exists} ->
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?DEBUG("no session associated with sid: ~p", [ID]),
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{404, [?BAD_REQUEST], ""};
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{error, bad_key} ->
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?DEBUG("bad key: ~s", [Key]),
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case mnesia:dirty_read({http_bind, ID}) of
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[] ->
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{404, [?BAD_REQUEST], ""};
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[#http_bind{pid = FsmRef}] ->
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gen_fsm:sync_send_all_state_event(FsmRef,stop),
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{404, [?BAD_REQUEST], ""}
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end;
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{error, polling_too_frequently} ->
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?DEBUG("polling too frequently: ~p", [ID]),
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case mnesia:dirty_read({http_bind, ID}) of
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[] -> %% unlikely! (?)
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{404, [?BAD_REQUEST], ""};
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[#http_bind{pid = FsmRef}] ->
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gen_fsm:sync_send_all_state_event(FsmRef,stop),
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{403, [?BAD_REQUEST], ""}
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end;
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{repeat, OutPacket} ->
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?DEBUG("http_put said 'repeat!' ...~nOutPacket: ~p",
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[OutPacket]),
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send_outpacket(ID, OutPacket);
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ok ->
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receive_loop(ID,ID1,RID,Wait,Hold,Attrs)
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end
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end;
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_ ->
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{400, [?BAD_REQUEST], ""}
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end;
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process_request(_Request) ->
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{400, [], {xmlelement, "h1", [],
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[{xmlcdata, "400 Bad Request"}]}}.
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receive_loop(ID,ID1,RID,Wait,Hold,Attrs) ->
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receive
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after 100 -> ok
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end,
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prepare_response(ID,ID1,RID,Wait,Hold,Attrs).
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prepare_response(ID,ID1,RID,Wait,Hold,Attrs) ->
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case http_get(ID,RID) of
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{error, not_exists} ->
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?DEBUG("no session associated with sid: ~s", ID),
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{404, [?BAD_REQUEST], ""};
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{ok, keep_on_hold} ->
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receive_loop(ID,ID1,RID,Wait,Hold,Attrs);
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{ok, cancel} ->
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%% actually it would be better if we could completely
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%% cancel this request, but then we would have to hack
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%% ejabberd_http and I'm too lazy now
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{404, [?BAD_REQUEST], ""};
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{ok, OutPacket} ->
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?DEBUG("OutPacket: ~s", [OutPacket]),
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if
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ID == ID1 ->
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send_outpacket(ID, OutPacket);
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true ->
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To = xml:get_attr_s("to",Attrs),
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OutEls = case xml_stream:parse_element(
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OutPacket++"</stream:stream>") of
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El when element(1, El) == xmlelement ->
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{xmlelement, _, OutAttrs, Els} = El,
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AuthID = xml:get_attr_s("id", OutAttrs),
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StreamError = false,
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case Els of
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[] ->
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[];
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[{xmlelement, "stream:features", StreamAttribs, StreamEls} | StreamTail] ->
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[{xmlelement, "stream:features", [{"xmlns:stream","http://etherx.jabber.org/streams"}] ++ StreamAttribs, StreamEls}] ++ StreamTail;
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Xml ->
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Xml
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end;
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{error, _} ->
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AuthID = "",
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StreamError = true,
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[]
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end,
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if
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To == "" ->
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{200, [?CT], "<body type='terminate' "
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"condition='improper-addressing' "
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"xmlns='http://jabber.org/protocol/httpbind'/>"};
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StreamError == true ->
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{200, [?CT], "<body type='terminate' "
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"condition='host-unknown' "
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"xmlns='http://jabber.org/protocol/httpbind'/>"};
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true ->
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{200, [?CT],
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xml:element_to_string(
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{xmlelement,"body",
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[{"xmlns",
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"http://jabber.org/protocol/httpbind"},
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{"sid",ID},
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{"wait", integer_to_list(Wait)},
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{"requests", integer_to_list(Hold+1)},
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{"inactivity",
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integer_to_list(trunc(?MAX_INACTIVITY/1000))},
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{"polling", ?MIN_POLLING},
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{"authid", AuthID}
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],OutEls})}
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end
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end
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end.
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send_outpacket(ID, OutPacket) ->
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case OutPacket of
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"" ->
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{200, [?CT], "<body xmlns='http://jabber.org/protocol/httpbind'/>"};
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"</stream:stream>" ->
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case mnesia:dirty_read({http_bind, ID}) of
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[#http_bind{pid = FsmRef}] ->
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gen_fsm:sync_send_all_state_event(FsmRef,stop)
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|
end,
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{200, [?CT], "<body xmlns='http://jabber.org/protocol/httpbind'/>"};
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_ ->
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case xml_stream:parse_element("<body>"
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++ OutPacket
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++ "</body>")
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|
of
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|
El when element(1, El) == xmlelement ->
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{xmlelement, _, _, OEls} = El,
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TypedEls = [xml:replace_tag_attr("xmlns",
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"jabber:client",OEl) ||
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OEl <- OEls],
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|
?DEBUG(" --- outgoing data --- ~n~s~n --- END --- ~n",
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[xml:element_to_string(
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|
{xmlelement,"body",
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|
[{"xmlns",
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|
"http://jabber.org/protocol/httpbind"}],
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|
TypedEls})]
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|
),
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|
{200, [?CT],
|
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|
xml:element_to_string(
|
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|
{xmlelement,"body",
|
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|
[{"xmlns",
|
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|
"http://jabber.org/protocol/httpbind"}],
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|
TypedEls})};
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|
{error, _E} ->
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|
OutEls = case xml_stream:parse_element(
|
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|
OutPacket++"</stream:stream>") of
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|
SEl when element(1, SEl) == xmlelement ->
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|
{xmlelement, _, _OutAttrs, SEls} = SEl,
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|
StreamError = false,
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||||||
|
case SEls of
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|
[] ->
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||||||
|
[];
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||||||
|
[{xmlelement, "stream:features", StreamAttribs, StreamEls} | StreamTail] ->
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|
TypedTail = [xml:replace_tag_attr("xmlns",
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|
"jabber:client",OEl) ||
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||||||
|
OEl <- StreamTail],
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|
[{xmlelement, "stream:features", [{"xmlns:stream","http://etherx.jabber.org/streams"}] ++ StreamAttribs, StreamEls}] ++ TypedTail;
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|
Xml ->
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||||||
|
Xml
|
||||||
|
end;
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||||||
|
{error, _} ->
|
||||||
|
StreamError = true,
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||||||
|
[]
|
||||||
|
end,
|
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|
if
|
||||||
|
StreamError ->
|
||||||
|
StreamErrCond = case xml_stream:parse_element(
|
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|
"<stream:stream>"++OutPacket) of
|
||||||
|
El when element(1, El) == xmlelement ->
|
||||||
|
{xmlelement, _Tag, _Attr, Els} = El,
|
||||||
|
[{xmlelement, SE, _, Cond} | _] = Els,
|
||||||
|
if
|
||||||
|
SE == "stream:error" ->
|
||||||
|
Cond;
|
||||||
|
true ->
|
||||||
|
null
|
||||||
|
end;
|
||||||
|
{error, _E} ->
|
||||||
|
null
|
||||||
|
end,
|
||||||
|
case mnesia:dirty_read({http_bind, ID}) of
|
||||||
|
[#http_bind{pid = FsmRef}] ->
|
||||||
|
gen_fsm:sync_send_all_state_event(FsmRef,stop);
|
||||||
|
_ ->
|
||||||
|
err %% hu?
|
||||||
|
end,
|
||||||
|
case StreamErrCond of
|
||||||
|
null ->
|
||||||
|
{200, [?CT],
|
||||||
|
"<body type='terminate' "
|
||||||
|
"condition='internal-server-error' "
|
||||||
|
"xmlns='http://jabber.org/protocol/httpbind'/>"};
|
||||||
|
_ ->
|
||||||
|
{200, [?CT],
|
||||||
|
"<body type='terminate' "
|
||||||
|
"condition='remote-stream-error' "
|
||||||
|
"xmlns='http://jabber.org/protocol/httpbind'>" ++
|
||||||
|
elements_to_string(StreamErrCond) ++
|
||||||
|
"</body>"}
|
||||||
|
end;
|
||||||
|
true ->
|
||||||
|
{200, [?CT],
|
||||||
|
xml:element_to_string(
|
||||||
|
{xmlelement,"body",
|
||||||
|
[{"xmlns",
|
||||||
|
"http://jabber.org/protocol/httpbind"}],
|
||||||
|
OutEls})}
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end.
|
||||||
|
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% Callback functions from gen_fsm
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: init/1
|
||||||
|
%% Returns: {ok, StateName, StateData} |
|
||||||
|
%% {ok, StateName, StateData, Timeout} |
|
||||||
|
%% ignore |
|
||||||
|
%% {stop, StopReason}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
init([ID, Key]) ->
|
||||||
|
?INFO_MSG("started: ~p", [{ID, Key}]),
|
||||||
|
Opts = [], % TODO
|
||||||
|
{ok, C2SPid} = ejabberd_c2s:start({?MODULE, {http_bind, self()}}, Opts),
|
||||||
|
ejabberd_c2s:become_controller(C2SPid),
|
||||||
|
Timer = erlang:start_timer(?MAX_INACTIVITY, self(), []),
|
||||||
|
{ok, loop, #state{id = ID,
|
||||||
|
key = Key,
|
||||||
|
timer = Timer}}.
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: StateName/2
|
||||||
|
%% Returns: {next_state, NextStateName, NextStateData} |
|
||||||
|
%% {next_state, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {stop, Reason, NewStateData}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: StateName/3
|
||||||
|
%% Returns: {next_state, NextStateName, NextStateData} |
|
||||||
|
%% {next_state, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {reply, Reply, NextStateName, NextStateData} |
|
||||||
|
%% {reply, Reply, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {stop, Reason, NewStateData} |
|
||||||
|
%% {stop, Reason, Reply, NewStateData}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%state_name(Event, From, StateData) ->
|
||||||
|
% Reply = ok,
|
||||||
|
% {reply, Reply, state_name, StateData}.
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: handle_event/3
|
||||||
|
%% Returns: {next_state, NextStateName, NextStateData} |
|
||||||
|
%% {next_state, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {stop, Reason, NewStateData}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
handle_event(_Event, StateName, StateData) ->
|
||||||
|
{next_state, StateName, StateData}.
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: handle_sync_event/4
|
||||||
|
%% Returns: {next_state, NextStateName, NextStateData} |
|
||||||
|
%% {next_state, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {reply, Reply, NextStateName, NextStateData} |
|
||||||
|
%% {reply, Reply, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {stop, Reason, NewStateData} |
|
||||||
|
%% {stop, Reason, Reply, NewStateData}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
handle_sync_event({send, Packet}, _From, StateName, StateData) ->
|
||||||
|
Output = [StateData#state.output | Packet],
|
||||||
|
Reply = ok,
|
||||||
|
{reply, Reply, StateName, StateData#state{output = Output}};
|
||||||
|
|
||||||
|
handle_sync_event(activate, From, StateName, StateData) ->
|
||||||
|
case StateData#state.input of
|
||||||
|
"" ->
|
||||||
|
{reply, ok, StateName, StateData#state{
|
||||||
|
waiting_input = From}};
|
||||||
|
Input ->
|
||||||
|
From ! {tcp, {http_bind, self()}, list_to_binary(Input)},
|
||||||
|
{reply, ok, StateName, StateData#state{
|
||||||
|
input = "",
|
||||||
|
waiting_input = false,
|
||||||
|
last_receiver = From}}
|
||||||
|
end;
|
||||||
|
|
||||||
|
handle_sync_event(stop, _From, _StateName, StateData) ->
|
||||||
|
Reply = ok,
|
||||||
|
{stop, normal, Reply, StateData};
|
||||||
|
|
||||||
|
handle_sync_event({http_put, RID, Key, NewKey, Hold, Packet, StartTo},
|
||||||
|
_From, StateName, StateData) ->
|
||||||
|
%% check if RID valid
|
||||||
|
RidAllow = case RID of
|
||||||
|
error ->
|
||||||
|
false;
|
||||||
|
_ ->
|
||||||
|
case StateData#state.rid of
|
||||||
|
error ->
|
||||||
|
%% first request - nothing saved so far
|
||||||
|
true;
|
||||||
|
OldRID ->
|
||||||
|
?DEBUG("state.rid/cur rid: ~p/~p",
|
||||||
|
[OldRID, RID]),
|
||||||
|
if
|
||||||
|
(OldRID < RID) and
|
||||||
|
(RID =< (OldRID + Hold + 1)) ->
|
||||||
|
true;
|
||||||
|
(RID =< OldRID) and
|
||||||
|
(RID > OldRID - Hold - 1) ->
|
||||||
|
repeat;
|
||||||
|
true ->
|
||||||
|
false
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end,
|
||||||
|
%% check if key valid
|
||||||
|
KeyAllow = case RidAllow of
|
||||||
|
repeat ->
|
||||||
|
true;
|
||||||
|
false ->
|
||||||
|
false;
|
||||||
|
true ->
|
||||||
|
case StateData#state.key of
|
||||||
|
"" ->
|
||||||
|
true;
|
||||||
|
OldKey ->
|
||||||
|
NextKey = httpd_util:to_lower(
|
||||||
|
hex(binary_to_list(
|
||||||
|
crypto:sha(Key)))),
|
||||||
|
?DEBUG("Key/OldKey/NextKey: ~s/~s/~s",
|
||||||
|
[Key, OldKey, NextKey]),
|
||||||
|
if
|
||||||
|
OldKey == NextKey ->
|
||||||
|
true;
|
||||||
|
true ->
|
||||||
|
?DEBUG("wrong key: ~s",[Key]),
|
||||||
|
false
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end,
|
||||||
|
{_,TSec,TMSec} = now(),
|
||||||
|
TNow = TSec*1000*1000 + TMSec,
|
||||||
|
LastPoll = if
|
||||||
|
Packet == "" ->
|
||||||
|
TNow;
|
||||||
|
true ->
|
||||||
|
0
|
||||||
|
end,
|
||||||
|
{MinPoll, _} = string:to_integer(?MIN_POLLING),
|
||||||
|
if
|
||||||
|
(Packet == "") and
|
||||||
|
(TNow - StateData#state.last_poll < MinPoll*1000*1000) ->
|
||||||
|
Reply = {error, polling_too_frequently},
|
||||||
|
{reply, Reply, StateName, StateData};
|
||||||
|
KeyAllow ->
|
||||||
|
case RidAllow of
|
||||||
|
false ->
|
||||||
|
Reply = {error, not_exists},
|
||||||
|
{reply, Reply, StateName, StateData};
|
||||||
|
repeat ->
|
||||||
|
?DEBUG("REPEATING ~p", [RID]),
|
||||||
|
[Out | _XS] = [El#hbr.out ||
|
||||||
|
El <- StateData#state.req_list,
|
||||||
|
El#hbr.rid == RID],
|
||||||
|
case Out of
|
||||||
|
[[] | OutPacket] ->
|
||||||
|
Reply = {repeat, OutPacket};
|
||||||
|
_ ->
|
||||||
|
Reply = {repeat, Out}
|
||||||
|
end,
|
||||||
|
{reply, Reply, StateName,
|
||||||
|
StateData#state{input = "cancel", last_poll = LastPoll}};
|
||||||
|
true ->
|
||||||
|
SaveKey = if
|
||||||
|
NewKey == "" ->
|
||||||
|
Key;
|
||||||
|
true ->
|
||||||
|
NewKey
|
||||||
|
end,
|
||||||
|
?DEBUG(" -- SaveKey: ~s~n", [SaveKey]),
|
||||||
|
|
||||||
|
%% save request
|
||||||
|
ReqList = [#hbr{rid=RID,
|
||||||
|
key=StateData#state.key,
|
||||||
|
in=StateData#state.input,
|
||||||
|
out=StateData#state.output
|
||||||
|
} |
|
||||||
|
[El || El <- StateData#state.req_list,
|
||||||
|
El#hbr.rid < RID,
|
||||||
|
El#hbr.rid > (RID - 1 - Hold)]
|
||||||
|
],
|
||||||
|
%% ?DEBUG("reqlist: ~p", [ReqList]),
|
||||||
|
case StateData#state.waiting_input of
|
||||||
|
false ->
|
||||||
|
cancel_timer(StateData#state.timer),
|
||||||
|
Timer = erlang:start_timer(
|
||||||
|
?MAX_INACTIVITY, self(), []),
|
||||||
|
Input = Packet ++ [StateData#state.input],
|
||||||
|
Reply = ok,
|
||||||
|
{reply, Reply, StateName,
|
||||||
|
StateData#state{input = Input,
|
||||||
|
rid = RID,
|
||||||
|
key = SaveKey,
|
||||||
|
ctime = TNow,
|
||||||
|
timer = Timer,
|
||||||
|
last_poll = LastPoll,
|
||||||
|
req_list = ReqList
|
||||||
|
}};
|
||||||
|
{Receiver, _Tag} ->
|
||||||
|
SendPacket =
|
||||||
|
if
|
||||||
|
StartTo /= "" ->
|
||||||
|
["<stream:stream to='",
|
||||||
|
StartTo,
|
||||||
|
"' xmlns='jabber:client' "
|
||||||
|
"version='1.0' "
|
||||||
|
"xmlns:stream='http://etherx.jabber.org/streams'>"] ++ Packet;
|
||||||
|
true ->
|
||||||
|
Packet
|
||||||
|
end,
|
||||||
|
?DEBUG("really sending now: ~s", [SendPacket]),
|
||||||
|
Receiver ! {tcp, {http_bind, self()},
|
||||||
|
list_to_binary(SendPacket)},
|
||||||
|
cancel_timer(StateData#state.timer),
|
||||||
|
Timer = erlang:start_timer(
|
||||||
|
?MAX_INACTIVITY, self(), []),
|
||||||
|
Reply = ok,
|
||||||
|
{reply, Reply, StateName,
|
||||||
|
StateData#state{waiting_input = false,
|
||||||
|
last_receiver = Receiver,
|
||||||
|
input = "",
|
||||||
|
rid = RID,
|
||||||
|
key = SaveKey,
|
||||||
|
ctime = TNow,
|
||||||
|
timer = Timer,
|
||||||
|
last_poll = LastPoll,
|
||||||
|
req_list = ReqList
|
||||||
|
}}
|
||||||
|
end
|
||||||
|
end;
|
||||||
|
true ->
|
||||||
|
Reply = {error, bad_key},
|
||||||
|
{reply, Reply, StateName, StateData}
|
||||||
|
end;
|
||||||
|
|
||||||
|
handle_sync_event({http_get, RID, Wait, Hold}, _From, StateName, StateData) ->
|
||||||
|
{_,TSec,TMSec} = now(),
|
||||||
|
TNow = TSec*1000*1000 + TMSec,
|
||||||
|
cancel_timer(StateData#state.timer),
|
||||||
|
Timer = erlang:start_timer(?MAX_INACTIVITY, self(), []),
|
||||||
|
if
|
||||||
|
(Hold > 0) and
|
||||||
|
(StateData#state.output == "") and
|
||||||
|
((TNow - StateData#state.ctime) < (Wait*1000*1000)) and
|
||||||
|
(StateData#state.rid == RID) and
|
||||||
|
(StateData#state.input /= "cancel") ->
|
||||||
|
Output = StateData#state.output,
|
||||||
|
ReqList = StateData#state.req_list,
|
||||||
|
Reply = {ok, keep_on_hold};
|
||||||
|
(StateData#state.input == "cancel") ->
|
||||||
|
Output = StateData#state.output,
|
||||||
|
ReqList = StateData#state.req_list,
|
||||||
|
Reply = {ok, cancel};
|
||||||
|
true ->
|
||||||
|
case StateData#state.output of
|
||||||
|
[[]| OutPacket] ->
|
||||||
|
Reply = {ok, OutPacket};
|
||||||
|
_ ->
|
||||||
|
Reply = {ok, StateData#state.output}
|
||||||
|
end,
|
||||||
|
%% save request
|
||||||
|
ReqList = [#hbr{rid=RID,
|
||||||
|
key=StateData#state.key,
|
||||||
|
in=StateData#state.input,
|
||||||
|
out=StateData#state.output
|
||||||
|
} |
|
||||||
|
[El || El <- StateData#state.req_list,
|
||||||
|
El#hbr.rid /= RID ]
|
||||||
|
],
|
||||||
|
Output = ""
|
||||||
|
end,
|
||||||
|
{reply, Reply, StateName, StateData#state{
|
||||||
|
input = "",
|
||||||
|
output = Output,
|
||||||
|
timer = Timer,
|
||||||
|
req_list = ReqList}};
|
||||||
|
|
||||||
|
handle_sync_event(_Event, _From, StateName, StateData) ->
|
||||||
|
Reply = ok,
|
||||||
|
{reply, Reply, StateName, StateData}.
|
||||||
|
|
||||||
|
code_change(_OldVsn, StateName, StateData, _Extra) ->
|
||||||
|
{ok, StateName, StateData}.
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: handle_info/3
|
||||||
|
%% Returns: {next_state, NextStateName, NextStateData} |
|
||||||
|
%% {next_state, NextStateName, NextStateData, Timeout} |
|
||||||
|
%% {stop, Reason, NewStateData}
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
handle_info({timeout, Timer, _}, _StateName,
|
||||||
|
#state{timer = Timer} = StateData) ->
|
||||||
|
?DEBUG("ding dong", []),
|
||||||
|
{stop, normal, StateData};
|
||||||
|
|
||||||
|
handle_info(_, StateName, StateData) ->
|
||||||
|
{next_state, StateName, StateData}.
|
||||||
|
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
%% Func: terminate/3
|
||||||
|
%% Purpose: Shutdown the fsm
|
||||||
|
%% Returns: any
|
||||||
|
%%----------------------------------------------------------------------
|
||||||
|
terminate(_Reason, _StateName, StateData) ->
|
||||||
|
?DEBUG("terminate: deleting session ~s", [StateData#state.id]),
|
||||||
|
mnesia:transaction(
|
||||||
|
fun() ->
|
||||||
|
mnesia:delete({http_bind, StateData#state.id})
|
||||||
|
end),
|
||||||
|
case StateData#state.waiting_input of
|
||||||
|
false ->
|
||||||
|
case StateData#state.last_receiver of
|
||||||
|
undefined -> ok;
|
||||||
|
Receiver -> Receiver ! {tcp_closed, {http_bind, self()}}
|
||||||
|
end;
|
||||||
|
{Receiver, _Tag} -> Receiver ! {tcp_closed, {http_bind, self()}}
|
||||||
|
end,
|
||||||
|
ok.
|
||||||
|
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% Internal functions
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
|
||||||
|
http_put(ID, RID, Key, NewKey, Hold, Packet, Restart) ->
|
||||||
|
?DEBUG("http-put",[]),
|
||||||
|
case mnesia:dirty_read({http_bind, ID}) of
|
||||||
|
[] ->
|
||||||
|
?DEBUG("not found",[]),
|
||||||
|
{error, not_exists};
|
||||||
|
[#http_bind{pid = FsmRef,to=To}] ->
|
||||||
|
case Restart of
|
||||||
|
true ->
|
||||||
|
?DEBUG("restart requested for ~s", [To]),
|
||||||
|
gen_fsm:sync_send_all_state_event(
|
||||||
|
FsmRef, {http_put, RID, Key, NewKey, Hold, Packet, To});
|
||||||
|
_ ->
|
||||||
|
gen_fsm:sync_send_all_state_event(
|
||||||
|
FsmRef, {http_put, RID, Key, NewKey, Hold, Packet, ""})
|
||||||
|
end
|
||||||
|
end.
|
||||||
|
|
||||||
|
http_get(ID,RID) ->
|
||||||
|
case mnesia:dirty_read({http_bind, ID}) of
|
||||||
|
[] ->
|
||||||
|
{error, not_exists};
|
||||||
|
[#http_bind{pid = FsmRef, wait = Wait, hold = Hold}] ->
|
||||||
|
gen_fsm:sync_send_all_state_event(FsmRef,
|
||||||
|
{http_get, RID, Wait, Hold})
|
||||||
|
end.
|
||||||
|
|
||||||
|
|
||||||
|
parse_request(Data) ->
|
||||||
|
?DEBUG("--- incoming data --- ~n~s~n --- END --- ",
|
||||||
|
[Data]),
|
||||||
|
case xml_stream:parse_element(Data) of
|
||||||
|
El when element(1, El) == xmlelement ->
|
||||||
|
{xmlelement, Name, Attrs, Els} = El,
|
||||||
|
ID = xml:get_attr_s("sid",Attrs),
|
||||||
|
{RID,_X} = string:to_integer(xml:get_attr_s("rid",Attrs)),
|
||||||
|
Key = xml:get_attr_s("key",Attrs),
|
||||||
|
NewKey = xml:get_attr_s("newkey",Attrs),
|
||||||
|
Xmlns = xml:get_attr_s("xmlns",Attrs),
|
||||||
|
lists:map(fun(E) ->
|
||||||
|
EXmlns = xml:get_tag_attr_s("xmlns",E),
|
||||||
|
if
|
||||||
|
EXmlns == "jabber:client" ->
|
||||||
|
xml:remove_tag_attr("xmlns",E);
|
||||||
|
true ->
|
||||||
|
ok
|
||||||
|
end
|
||||||
|
end, Els),
|
||||||
|
Packet = [xml:element_to_string(E) || E <- Els],
|
||||||
|
?DEBUG("ns fixed packet(s): ~s", [Packet]),
|
||||||
|
if
|
||||||
|
Name /= "body" ->
|
||||||
|
{error, bad_request};
|
||||||
|
Xmlns /= "http://jabber.org/protocol/httpbind" ->
|
||||||
|
{error, bad_request};
|
||||||
|
true ->
|
||||||
|
{ok, ID, RID, Key, NewKey, Attrs, Packet}
|
||||||
|
end;
|
||||||
|
{error, _Reason} ->
|
||||||
|
{error, bad_request}
|
||||||
|
end.
|
||||||
|
|
||||||
|
cancel_timer(Timer) ->
|
||||||
|
erlang:cancel_timer(Timer),
|
||||||
|
receive
|
||||||
|
{timeout, Timer, _} ->
|
||||||
|
ok
|
||||||
|
after 0 ->
|
||||||
|
ok
|
||||||
|
end.
|
||||||
|
|
||||||
|
hex(Bin) when binary(Bin) -> hex(binary_to_list(Bin));
|
||||||
|
hex([]) -> "";
|
||||||
|
hex([H|T]) ->
|
||||||
|
[A,B] = if
|
||||||
|
H == 0 -> "00";
|
||||||
|
H < 16 -> [$0,element(H,{$1,$2,$3,$4,$5,$6,$7,$8,$9,$a,$b,$c,$d,$e,$f})];
|
||||||
|
true -> erlang:integer_to_list(H,16)
|
||||||
|
end,
|
||||||
|
[A,B|hex(T)].
|
||||||
|
|
||||||
|
elements_to_string([]) ->
|
||||||
|
[];
|
||||||
|
elements_to_string([El | Els]) ->
|
||||||
|
xml:element_to_string(El) ++ elements_to_string(Els).
|
||||||
102
src/web/mod_http_bind.erl
Normal file
102
src/web/mod_http_bind.erl
Normal file
@ -0,0 +1,102 @@
|
|||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% File : mod_http_bind.erl
|
||||||
|
%%% Author : Stefan Strigler <steve@zeank.in-berlin.de>
|
||||||
|
%%% Purpose : Implementation of XMPP over BOSH (XEP-0206)
|
||||||
|
%%% Created : Tue Feb 20 13:15:52 CET 2007
|
||||||
|
%%% Id : $Id: $
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% this module acts as a bridge to ejabberd_http_bind which implements
|
||||||
|
%%% the real stuff, this is to handle the new pluggable architecture for
|
||||||
|
%%% extending ejabberd's http service
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
-module(mod_http_bind).
|
||||||
|
-author('steve@zeank.in-berlin.de').
|
||||||
|
|
||||||
|
-define(MOD_HTTP_BIND_VERSION, "1.0").
|
||||||
|
-vsn(?MOD_HTTP_BIND_VERSION).
|
||||||
|
|
||||||
|
%%-define(ejabberd_debug, true).
|
||||||
|
|
||||||
|
-behaviour(gen_mod).
|
||||||
|
|
||||||
|
-export([
|
||||||
|
start/2,
|
||||||
|
stop/1,
|
||||||
|
process/2
|
||||||
|
]).
|
||||||
|
|
||||||
|
-include("ejabberd.hrl").
|
||||||
|
-include("jlib.hrl").
|
||||||
|
-include("ejabberd_http.hrl").
|
||||||
|
|
||||||
|
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% API
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
|
||||||
|
process([], #request{method = 'POST',
|
||||||
|
data = []}) ->
|
||||||
|
?DEBUG("Bad Request: no data", []),
|
||||||
|
{400, [], {xmlelement, "h1", [],
|
||||||
|
[{xmlcdata, "400 Bad Request"}]}};
|
||||||
|
process([], #request{method = 'POST',
|
||||||
|
data = Data}) ->
|
||||||
|
?DEBUG("Incoming data: ~s", [Data]),
|
||||||
|
ejabberd_http_bind:process_request(Data);
|
||||||
|
process([], #request{method = 'GET',
|
||||||
|
data = []}) ->
|
||||||
|
Heading = "Ejabberd " ++ atom_to_list(?MODULE) ++ " v" ++ ?MOD_HTTP_BIND_VERSION,
|
||||||
|
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}],
|
||||||
|
[{xmlelement, "head", [],
|
||||||
|
[{xmlelement, "title", [], [{xmlcdata, Heading}]}]},
|
||||||
|
{xmlelement, "body", [],
|
||||||
|
[{xmlelement, "h1", [], [{xmlcdata, Heading}]},
|
||||||
|
{xmlelement, "p", [],
|
||||||
|
[{xmlcdata, "An implementation of "},
|
||||||
|
{xmlelement, "a", [{"href", "http://www.xmpp.org/extensions/xep-0206.html"}],
|
||||||
|
[{xmlcdata, "XMPP over BOSH (XEP-0206)"}]}]},
|
||||||
|
{xmlelement, "p", [],
|
||||||
|
[{xmlcdata, integer_to_list(mnesia:table_info(http_bind, size)) ++ " sessions found."}]},
|
||||||
|
{xmlelement, "p", [],
|
||||||
|
[{xmlcdata, "Sponsored by "},
|
||||||
|
{xmlelement, "a", [{"href", "http://mabber.com"}],
|
||||||
|
[{xmlcdata, "mabber"}]},
|
||||||
|
{xmlcdata, "."}]}
|
||||||
|
]}]};
|
||||||
|
process(_Path, _Request) ->
|
||||||
|
?DEBUG("Bad Request: ~p", [_Request]),
|
||||||
|
{400, [], {xmlelement, "h1", [],
|
||||||
|
[{xmlcdata, "400 Bad Request"}]}}.
|
||||||
|
|
||||||
|
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
%%% BEHAVIOUR CALLBACKS
|
||||||
|
%%%----------------------------------------------------------------------
|
||||||
|
start(_Host, _Opts) ->
|
||||||
|
HTTPBindSupervisor =
|
||||||
|
{ejabberd_http_bind_sup,
|
||||||
|
{ejabberd_tmp_sup, start_link,
|
||||||
|
[ejabberd_http_bind_sup, ejabberd_http_bind]},
|
||||||
|
permanent,
|
||||||
|
infinity,
|
||||||
|
supervisor,
|
||||||
|
[ejabberd_tmp_sup]},
|
||||||
|
case supervisor:start_child(ejabberd_sup, HTTPBindSupervisor) of
|
||||||
|
{ok, _Pid} ->
|
||||||
|
ok;
|
||||||
|
{ok, _Pid, _Info} ->
|
||||||
|
ok;
|
||||||
|
{error, Error} ->
|
||||||
|
{'EXIT', {start_child_error, Error}}
|
||||||
|
end.
|
||||||
|
|
||||||
|
stop(_Host) ->
|
||||||
|
case supervisor:terminate_child(ejabberd_sup, ejabberd_http_bind_sup) of
|
||||||
|
ok ->
|
||||||
|
ok;
|
||||||
|
{error, Error} ->
|
||||||
|
{'EXIT', {terminate_child_error, Error}}
|
||||||
|
end.
|
||||||
Loading…
Reference in New Issue
Block a user