149 lines
5.3 KiB
Erlang
149 lines
5.3 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : mod_http_bind.erl
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%%% Author : Stefan Strigler <steve@zeank.in-berlin.de>
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%%% Purpose : Implementation of XMPP over BOSH (XEP-0206)
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%%% Created : Tue Feb 20 13:15:52 CET 2007
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2011 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License
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%%% along with this program; if not, write to the Free Software
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%%% Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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%%% 02111-1307 USA
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%%%
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%%%----------------------------------------------------------------------
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%%%----------------------------------------------------------------------
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%%% This module acts as a bridge to ejabberd_http_bind which implements
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%%% the real stuff, this is to handle the new pluggable architecture for
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%%% extending ejabberd's http service.
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%%%----------------------------------------------------------------------
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-module(mod_http_bind).
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-author('steve@zeank.in-berlin.de').
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%%-define(ejabberd_debug, true).
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-behaviour(gen_mod).
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-export([
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start/2,
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stop/1,
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process/2
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]).
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-include_lib("exmpp/include/exmpp.hrl").
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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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-include("http_bind.hrl").
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-define(PROCNAME_MHB, ejabberd_mod_http_bind).
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%% Duplicated from ejabberd_http_bind.
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%% TODO: move to hrl file.
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-record(http_bind, {id, pid, to, hold, wait, process_delay, version}).
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%%%----------------------------------------------------------------------
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%%% API
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%%%----------------------------------------------------------------------
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process([], #request{method = 'POST',
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data = []}) ->
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?DEBUG("Bad Request: no data", []),
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{400, ?HEADER, #xmlel{name = h1, children =
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[#xmlcdata{cdata = <<"400 Bad Request">>}]}};
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process([], #request{method = 'POST',
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data = Data,
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ip = IP}) ->
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?DEBUG("Incoming data: ~s", [Data]),
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ejabberd_http_bind:process_request(Data, IP);
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process([], #request{method = 'GET',
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data = []}) ->
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{200, ?HEADER, get_human_html_xmlel()};
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process([], #request{method = 'OPTIONS',
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data = []}) ->
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{200, ?OPTIONS_HEADER, []};
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process(_Path, _Request) ->
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?DEBUG("Bad Request: ~p", [_Request]),
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{400, ?HEADER, #xmlel{name = h1, children =
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[#xmlcdata{cdata = <<"400 Bad Request">>}]}}.
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get_human_html_xmlel() ->
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Heading = list_to_binary("ejabberd " ++ atom_to_list(?MODULE)),
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H = #xmlel{name = h1, children = [#xmlcdata{cdata = Heading}]},
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Par1 = #xmlel{name = p, children =
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[#xmlcdata{cdata = <<"An implementation of ">>},
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#xmlel{name = a,
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attrs = [#xmlattr{name = <<"href">>, value = <<"http://xmpp.org/extensions/xep-0206.html">>}],
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children = [#xmlcdata{cdata = <<"XMPP over BOSH (XEP-0206)">>}]
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}
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]},
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Par2 = #xmlel{name = p, children =
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[#xmlcdata{cdata = <<"This web page is only informative. "
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"To use HTTP-Bind you need a Jabber/XMPP client that supports it.">>}
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]},
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#xmlel{name = html,
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attrs = [#xmlattr{name = <<"xmlns">>, value= <<"http://www.w3.org/1999/xhtml">>}],
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children =
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[#xmlel{name = head, children = [#xmlel{name = title, children = [#xmlcdata{cdata = Heading}]}]},
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#xmlel{name = body, children = [H, Par1, Par2]}]}.
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%%%----------------------------------------------------------------------
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%%% BEHAVIOUR CALLBACKS
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%%%----------------------------------------------------------------------
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start(Host, Opts) when is_list(Host) ->
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start(list_to_binary(Host), Opts);
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start(HostB, _Opts) ->
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setup_database(),
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Proc = gen_mod:get_module_proc(HostB, ?PROCNAME_MHB),
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ChildSpec =
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{Proc,
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{ejabberd_tmp_sup, start_link,
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[Proc, ejabberd_http_bind]},
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permanent,
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infinity,
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supervisor,
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[ejabberd_tmp_sup]},
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supervisor:start_child(ejabberd_sup, ChildSpec).
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stop(Host) ->
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Proc = gen_mod:get_module_proc(Host, ?PROCNAME_MHB),
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supervisor:terminate_child(ejabberd_sup, Proc),
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supervisor:delete_child(ejabberd_sup, Proc).
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setup_database() ->
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migrate_database(),
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mnesia:create_table(http_bind,
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[{ram_copies, [node()]},
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{local_content, true},
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{attributes, record_info(fields, http_bind)}]),
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mnesia:add_table_copy(http_bind, node(), ram_copies).
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migrate_database() ->
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case catch mnesia:table_info(http_bind, attributes) of
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[id, pid, to, hold, wait, process_delay, version] ->
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ok;
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_ ->
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%% Since the stored information is not important, instead
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%% of actually migrating data, let's just destroy the table
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mnesia:delete_table(http_bind)
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end,
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case catch mnesia:table_info(http_bind, local_content) of
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false ->
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mnesia:delete_table(http_bind);
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_ ->
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ok
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end.
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