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xmpp.chapril.org-ejabberd/src/web/mod_http_bind.erl

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%%%----------------------------------------------------------------------
%%% 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
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2010 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., 59 Temple Place, Suite 330, Boston, MA
%%% 02111-1307 USA
%%%
%%%----------------------------------------------------------------------
%%%----------------------------------------------------------------------
%%% 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, "1.2").
%%-define(ejabberd_debug, true).
-behaviour(gen_mod).
-export([
start/2,
stop/1,
process/2
]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-include("ejabberd_http.hrl").
-include("http_bind.hrl").
%% Duplicated from ejabberd_http_bind.
%% TODO: move to hrl file.
-record(http_bind, {id, pid, to, hold, wait, version}).
%%%----------------------------------------------------------------------
%%% API
%%%----------------------------------------------------------------------
process([], #request{method = 'POST',
data = []}) ->
?DEBUG("Bad Request: no data", []),
{400, ?HEADER, {xmlelement, "h1", [],
[{xmlcdata, "400 Bad Request"}]}};
process([], #request{method = 'POST',
data = Data,
ip = IP}) ->
?DEBUG("Incoming data: ~s", [Data]),
ejabberd_http_bind:process_request(Data, IP);
process([], #request{method = 'GET',
data = []}) ->
{200, ?HEADER, get_human_html_xmlel()};
process([], #request{method = 'OPTIONS',
data = []}) ->
{200, ?OPTIONS_HEADER, []};
process(_Path, _Request) ->
?DEBUG("Bad Request: ~p", [_Request]),
{400, ?HEADER, {xmlelement, "h1", [],
[{xmlcdata, "400 Bad Request"}]}}.
get_human_html_xmlel() ->
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://xmpp.org/extensions/xep-0206.html"}],
[{xmlcdata, "XMPP over BOSH (XEP-0206)"}]}]},
{xmlelement, "p", [],
[{xmlcdata, "This web page is only informative. "
"To use HTTP-Bind you need a Jabber/XMPP client that supports it."}
]}
]}]}.
%%%----------------------------------------------------------------------
%%% BEHAVIOUR CALLBACKS
%%%----------------------------------------------------------------------
start(_Host, _Opts) ->
setup_database(),
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, {already_started, _PidOther}} ->
% mod_http_bind is already started so it will not be started again
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.
setup_database() ->
migrate_database(),
mnesia:create_table(http_bind,
[{ram_copies, [node()]},
{attributes, record_info(fields, http_bind)}]).
migrate_database() ->
case catch mnesia:table_info(http_bind, attributes) of
[id, pid, to, hold, wait, version] ->
ok;
_ ->
%% Since the stored information is not important, instead
%% of actually migrating data, let's just destroy the table
mnesia:delete_table(http_bind)
end.