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authorBadlop <badlop@process-one.net>2009-06-16 17:43:35 +0000
committerBadlop <badlop@process-one.net>2009-06-16 17:43:35 +0000
commitbbe82647e8b2ab00a5b8cd94418a99d136dd8536 (patch)
tree7536b93deb6e6cc39aad1c4730ac241c13a0d981 /src/web/ejabberd_http_bind.erl
parentAdd permanent section about mod_http_fileserver to the Guide. Example config. (diff)
Initial commit of HTTP-Bind source code (thanks to Stefan Striegler)
SVN Revision: 2198
Diffstat (limited to 'src/web/ejabberd_http_bind.erl')
-rw-r--r--src/web/ejabberd_http_bind.erl804
1 files changed, 804 insertions, 0 deletions
diff --git a/src/web/ejabberd_http_bind.erl b/src/web/ejabberd_http_bind.erl
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+++ b/src/web/ejabberd_http_bind.erl
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+%%%----------------------------------------------------------------------
+%%% File : ejabberd_http_bind.erl
+%%% Author : Stefan Strigler <steve@zeank.in-berlin.de>
+%%% Purpose : HTTP Binding support (JEP-0124)
+%%% Created : 21 Sep 2005 by Stefan Strigler <steve@zeank.in-berlin.de>
+%%% Id : $Id: $
+%%%----------------------------------------------------------------------
+
+-module(ejabberd_http_bind).
+-author('steve@zeank.in-berlin.de').
+-vsn('Revision: 1.4').
+
+-behaviour(gen_fsm).
+
+%% External exports
+-export([start_link/2,
+ init/1,
+ handle_event/3,
+ handle_sync_event/4,
+ code_change/4,
+ handle_info/3,
+ terminate/3,
+ send/2,
+ setopts/2,
+ controlling_process/2,
+ close/1,
+ process_request/1]).
+
+%%-define(ejabberd_debug, true).
+
+-include("ejabberd.hrl").
+-include("jlib.hrl").
+-include("ejabberd_http.hrl").
+
+-record(http_bind, {id, pid, to, hold, wait}).
+
+%% http binding request
+-record(hbr, {rid,
+ key,
+ in,
+ out}).
+
+-record(state, {id,
+ rid = error,
+ key,
+ output = "",
+ input = "",
+ waiting_input = false,
+ last_receiver,
+ last_poll,
+ ctime = 0,
+ timer,
+ req_list = [] % list of requests
+ }).
+
+
+%-define(DBGFSM, true).
+
+-ifdef(DBGFSM).
+-define(FSMOPTS, [{debug, [trace]}]).
+-else.
+-define(FSMOPTS, []).
+-endif.
+
+-define(MAX_REQUESTS, 2). % number of simultaneous requests
+-define(MIN_POLLING, "2"). % don't poll faster than that or we will shoot you
+-define(MAX_WAIT, 60). % max num of secs to keep a request on hold
+-define(MAX_INACTIVITY, 30000). % msecs to wait before terminating idle sessions
+-define(CT, {"Content-Type", "text/xml; charset=utf-8"}).
+-define(BAD_REQUEST, ?CT).
+
+
+%%%----------------------------------------------------------------------
+%%% API
+%%%----------------------------------------------------------------------
+start(ID, Key) ->
+ mnesia:create_table(http_bind,
+ [{ram_copies, [node()]},
+ {attributes, record_info(fields, http_bind)}]),
+ supervisor:start_child(ejabberd_http_bind_sup, [ID, Key]).
+
+start_link(ID, Key) ->
+ gen_fsm:start_link(?MODULE, [ID, Key], ?FSMOPTS).
+
+send({http_bind, FsmRef}, Packet) ->
+ gen_fsm:sync_send_all_state_event(FsmRef, {send, Packet}).
+
+setopts({http_bind, FsmRef}, Opts) ->
+ case lists:member({active, once}, Opts) of
+ true ->
+ gen_fsm:sync_send_all_state_event(FsmRef, activate);
+ _ ->
+ ok
+ end.
+
+controlling_process(_Socket, _Pid) ->
+ ok.
+
+close({http_bind, FsmRef}) ->
+ catch gen_fsm:sync_send_all_state_event(FsmRef, close).
+
+
+process_request(#request{path = [],
+ data = Data}) ->
+ case catch parse_request(Data) of
+ {ok, ID1, RID, Key, NewKey, Attrs, Packet} ->
+ XmppDomain = xml:get_attr_s("to",Attrs),
+ if
+ (ID1 == "") and (XmppDomain == "") ->
+ {200, [?CT], "<body type='terminate' "
+ "condition='improper-addressing' "
+ "xmlns='http://jabber.org/protocol/httpbind'/>"};
+ true ->
+ ID = if
+ (ID1 == "") ->
+ %% create new session
+ NewID = sha:sha(term_to_binary({now(), make_ref()})),
+ {ok, Pid} = start(NewID, Key),
+ Wait = case
+ string:to_integer(xml:get_attr_s("wait",Attrs))
+ of
+ {error, _} ->
+ ?MAX_WAIT;
+ {CWait, _} ->
+ if
+ (CWait > ?MAX_WAIT) ->
+ ?MAX_WAIT;
+ true ->
+ CWait
+ end
+ end,
+ Hold = case
+ string:to_integer(
+ xml:get_attr_s("hold",Attrs))
+ of
+ {error, _} ->
+ (?MAX_REQUESTS - 1);
+ {CHold, _} ->
+ if
+ (CHold > (?MAX_REQUESTS - 1)) ->
+ (?MAX_REQUESTS - 1);
+ true ->
+ CHold
+ end
+ end,
+ mnesia:transaction(
+ fun() ->
+ mnesia:write(#http_bind{id = NewID,
+ pid = Pid,
+ to = XmppDomain,
+ wait = Wait,
+ hold = Hold})
+ end),
+ StreamStart = if
+ (XmppDomain /= "") ->
+ true;
+ true ->
+ false
+ end,
+ InPacket = Packet,
+ NewID;
+ true ->
+ %% old session
+ Type = xml:get_attr_s("type",Attrs),
+ StreamStart =
+ case xml:get_attr_s("xmpp:restart",Attrs) of
+ "true" ->
+ true;
+ _ ->
+ false
+ end,
+ Wait = ?MAX_WAIT,
+ Hold = (?MAX_REQUESTS - 1),
+ if
+ (Type == "terminate") ->
+ %% terminate session
+ InPacket = Packet ++ "</stream:stream>";
+ true ->
+ InPacket = Packet
+ end,
+ ID1
+ end,
+%% ?DEBUG("~n InPacket: ~s ~n", [InPacket]),
+ case http_put(ID, RID, Key, NewKey, Hold, InPacket, StreamStart) of
+ {error, not_exists} ->
+ ?DEBUG("no session associated with sid: ~p", [ID]),
+ {404, [?BAD_REQUEST], ""};
+ {error, bad_key} ->
+ ?DEBUG("bad key: ~s", [Key]),
+ case mnesia:dirty_read({http_bind, ID}) of
+ [] ->
+ {404, [?BAD_REQUEST], ""};
+ [#http_bind{pid = FsmRef}] ->
+ gen_fsm:sync_send_all_state_event(FsmRef,stop),
+ {404, [?BAD_REQUEST], ""}
+ end;
+ {error, polling_too_frequently} ->
+ ?DEBUG("polling too frequently: ~p", [ID]),
+ case mnesia:dirty_read({http_bind, ID}) of
+ [] -> %% unlikely! (?)
+ {404, [?BAD_REQUEST], ""};
+ [#http_bind{pid = FsmRef}] ->
+ gen_fsm:sync_send_all_state_event(FsmRef,stop),
+ {403, [?BAD_REQUEST], ""}
+ end;
+ {repeat, OutPacket} ->
+ ?DEBUG("http_put said 'repeat!' ...~nOutPacket: ~p",
+ [OutPacket]),
+ send_outpacket(ID, OutPacket);
+ ok ->
+ receive_loop(ID,ID1,RID,Wait,Hold,Attrs)
+ end
+ end;
+ _ ->
+ {400, [?BAD_REQUEST], ""}
+ end;
+process_request(_Request) ->
+ {400, [], {xmlelement, "h1", [],
+ [{xmlcdata, "400 Bad Request"}]}}.
+
+receive_loop(ID,ID1,RID,Wait,Hold,Attrs) ->
+ receive
+ after 100 -> ok
+ end,
+ prepare_response(ID,ID1,RID,Wait,Hold,Attrs).
+
+prepare_response(ID,ID1,RID,Wait,Hold,Attrs) ->
+ case http_get(ID,RID) of
+ {error, not_exists} ->
+ ?DEBUG("no session associated with sid: ~s", ID),
+ {404, [?BAD_REQUEST], ""};
+ {ok, keep_on_hold} ->
+ receive_loop(ID,ID1,RID,Wait,Hold,Attrs);
+ {ok, cancel} ->
+ %% actually it would be better if we could completely
+ %% cancel this request, but then we would have to hack
+ %% ejabberd_http and I'm too lazy now
+ {404, [?BAD_REQUEST], ""};
+ {ok, OutPacket} ->
+ ?DEBUG("OutPacket: ~s", [OutPacket]),
+ if
+ ID == ID1 ->
+ send_outpacket(ID, OutPacket);
+ true ->
+ To = xml:get_attr_s("to",Attrs),
+ OutEls = case xml_stream:parse_element(
+ OutPacket++"</stream:stream>") of
+ El when element(1, El) == xmlelement ->
+ {xmlelement, _, OutAttrs, Els} = El,
+ AuthID = xml:get_attr_s("id", OutAttrs),
+ StreamError = false,
+ case Els of
+ [] ->
+ [];
+ [{xmlelement, "stream:features", StreamAttribs, StreamEls} | StreamTail] ->
+ [{xmlelement, "stream:features", [{"xmlns:stream","http://etherx.jabber.org/streams"}] ++ StreamAttribs, StreamEls}] ++ StreamTail;
+ Xml ->
+ Xml
+ end;
+ {error, _} ->
+ AuthID = "",
+ StreamError = true,
+ []
+ end,
+ if
+ To == "" ->
+ {200, [?CT], "<body type='terminate' "
+ "condition='improper-addressing' "
+ "xmlns='http://jabber.org/protocol/httpbind'/>"};
+ StreamError == true ->
+ {200, [?CT], "<body type='terminate' "
+ "condition='host-unknown' "
+ "xmlns='http://jabber.org/protocol/httpbind'/>"};
+ true ->
+ {200, [?CT],
+ xml:element_to_string(
+ {xmlelement,"body",
+ [{"xmlns",
+ "http://jabber.org/protocol/httpbind"},
+ {"sid",ID},
+ {"wait", integer_to_list(Wait)},
+ {"requests", integer_to_list(Hold+1)},
+ {"inactivity",
+ integer_to_list(trunc(?MAX_INACTIVITY/1000))},
+ {"polling", ?MIN_POLLING},
+ {"authid", AuthID}
+ ],OutEls})}
+ end
+ end
+ end.
+
+send_outpacket(ID, OutPacket) ->
+ case OutPacket of
+ "" ->
+ {200, [?CT], "<body xmlns='http://jabber.org/protocol/httpbind'/>"};
+ "</stream:stream>" ->
+ case mnesia:dirty_read({http_bind, ID}) of
+ [#http_bind{pid = FsmRef}] ->
+ gen_fsm:sync_send_all_state_event(FsmRef,stop)
+ end,
+ {200, [?CT], "<body xmlns='http://jabber.org/protocol/httpbind'/>"};
+ _ ->
+ case xml_stream:parse_element("<body>"
+ ++ OutPacket
+ ++ "</body>")
+ of
+ El when element(1, El) == xmlelement ->
+ {xmlelement, _, _, OEls} = El,
+ TypedEls = [xml:replace_tag_attr("xmlns",
+ "jabber:client",OEl) ||
+ OEl <- OEls],
+ ?DEBUG(" --- outgoing data --- ~n~s~n --- END --- ~n",
+ [xml:element_to_string(
+ {xmlelement,"body",
+ [{"xmlns",
+ "http://jabber.org/protocol/httpbind"}],
+ TypedEls})]
+ ),
+ {200, [?CT],
+ xml:element_to_string(
+ {xmlelement,"body",
+ [{"xmlns",
+ "http://jabber.org/protocol/httpbind"}],
+ TypedEls})};
+ {error, _E} ->
+ OutEls = case xml_stream:parse_element(
+ OutPacket++"</stream:stream>") of
+ SEl when element(1, SEl) == xmlelement ->
+ {xmlelement, _, _OutAttrs, SEls} = SEl,
+ StreamError = false,
+ case SEls of
+ [] ->
+ [];
+ [{xmlelement, "stream:features", StreamAttribs, StreamEls} | StreamTail] ->
+ TypedTail = [xml:replace_tag_attr("xmlns",
+ "jabber:client",OEl) ||
+ OEl <- StreamTail],
+ [{xmlelement, "stream:features", [{"xmlns:stream","http://etherx.jabber.org/streams"}] ++ StreamAttribs, StreamEls}] ++ TypedTail;
+ Xml ->
+ Xml
+ end;
+ {error, _} ->
+ StreamError = true,
+ []
+ end,
+ if
+ StreamError ->
+ StreamErrCond = case xml_stream:parse_element(
+ "<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).
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 13:38:06 +0000