Chapril/xmpp.chapril.org-ejabberd
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xmpp.chapril.org-ejabberd/src/mod_bosh.erl
Evgeniy Khramtsov fddd6110e0 Don't validate an option in gen_mod:get*opt() functions 
The changes are very similar to those from previous commit:
* Now there is no need to pass validating function in
  gen_mod:get_opt() and gen_mod:get_module_opt() functions,
  because the modules' configuration keeps already validated values.
* New functions gen_mod:get_opt/2 and gen_mod:get_module_opt/3 are
  introduced.
* Functions gen_mod:get_opt/4 and get_module_opt/5 are deprecated.
  If the functions are still called, the "function" argument is
  simply ignored.
* Validating callback Mod:listen_opt_type/1 is introduced to validate
  listening options at startup.
2017-04-30 19:01:47 +03:00

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%%%-------------------------------------------------------------------
%%% File : mod_bosh.erl
%%% Author : Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%% Purpose : This module acts as a bridge to ejabberd_bosh which implements
%%% the real stuff, this is to handle the new pluggable architecture
%%% for extending ejabberd's http service.
%%% Created : 20 Jul 2011 by Evgeniy Khramtsov <ekhramtsov@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2017 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(mod_bosh).
-author('steve@zeank.in-berlin.de').
%%-define(ejabberd_debug, true).
-behaviour(gen_mod).
-export([start_link/0]).
-export([start/2, stop/1, reload/3, process/2, open_session/2,
close_session/1, find_session/1, clean_cache/1]).
-export([depends/2, mod_opt_type/1]).
-include("ejabberd.hrl").
-include("logger.hrl").
-include_lib("stdlib/include/ms_transform.hrl").
-include("xmpp.hrl").
-include("ejabberd_http.hrl").
-include("bosh.hrl").
-callback init() -> any().
-callback open_session(binary(), pid()) -> ok | {error, any()}.
-callback close_session(binary()) -> ok | {error, any()}.
-callback find_session(binary()) -> {ok, pid()} | {error, any()}.
-callback use_cache() -> boolean().
-callback cache_nodes() -> [node()].
-optional_callbacks([use_cache/0, cache_nodes/0]).
%%%----------------------------------------------------------------------
%%% API
%%%----------------------------------------------------------------------
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
process([], #request{method = 'POST', data = <<>>}) ->
?DEBUG("Bad Request: no data", []),
{400, ?HEADER(?CT_XML),
#xmlel{name = <<"h1">>, attrs = [],
children = [{xmlcdata, <<"400 Bad Request">>}]}};
process([],
#request{method = 'POST', data = Data, ip = IP, headers = Hdrs}) ->
?DEBUG("Incoming data: ~p", [Data]),
Type = get_type(Hdrs),
ejabberd_bosh:process_request(Data, IP, Type);
process([], #request{method = 'GET', data = <<>>}) ->
{200, ?HEADER(?CT_XML), get_human_html_xmlel()};
process([], #request{method = 'OPTIONS', data = <<>>}) ->
{200, ?OPTIONS_HEADER, []};
process(_Path, _Request) ->
?DEBUG("Bad Request: ~p", [_Request]),
{400, ?HEADER(?CT_XML),
#xmlel{name = <<"h1">>, attrs = [],
children = [{xmlcdata, <<"400 Bad Request">>}]}}.
-spec open_session(binary(), pid()) -> ok | {error, any()}.
open_session(SID, Pid) ->
Mod = gen_mod:ram_db_mod(global, ?MODULE),
case Mod:open_session(SID, Pid) of
ok ->
delete_cache(Mod, SID);
{error, _} = Err ->
Err
end.
-spec close_session(binary()) -> ok.
close_session(SID) ->
Mod = gen_mod:ram_db_mod(global, ?MODULE),
Mod:close_session(SID),
delete_cache(Mod, SID).
-spec find_session(binary()) -> {ok, pid()} | error.
find_session(SID) ->
Mod = gen_mod:ram_db_mod(global, ?MODULE),
case use_cache(Mod) of
true ->
ets_cache:lookup(
?BOSH_CACHE, SID,
fun() ->
case Mod:find_session(SID) of
{ok, Pid} -> {ok, Pid};
{error, _} -> error
end
end);
false ->
case Mod:find_session(SID) of
{ok, Pid} -> {ok, Pid};
{error, _} -> error
end
end.
start(Host, Opts) ->
start_jiffy(Opts),
Mod = gen_mod:ram_db_mod(global, ?MODULE),
init_cache(Mod),
Mod:init(),
clean_cache(),
TmpSup = gen_mod:get_module_proc(Host, ?MODULE),
TmpSupSpec = {TmpSup,
{ejabberd_tmp_sup, start_link, [TmpSup, ejabberd_bosh]},
permanent, infinity, supervisor, [ejabberd_tmp_sup]},
supervisor:start_child(ejabberd_gen_mod_sup, TmpSupSpec).
stop(Host) ->
TmpSup = gen_mod:get_module_proc(Host, ?MODULE),
supervisor:terminate_child(ejabberd_gen_mod_sup, TmpSup),
supervisor:delete_child(ejabberd_gen_mod_sup, TmpSup).
reload(_Host, NewOpts, _OldOpts) ->
start_jiffy(NewOpts),
Mod = gen_mod:ram_db_mod(global, ?MODULE),
init_cache(Mod),
Mod:init(),
ok.
%%%===================================================================
%%% Internal functions
%%%===================================================================
start_jiffy(Opts) ->
case gen_mod:get_opt(json, Opts, false) of
false ->
ok;
true ->
case catch ejabberd:start_app(jiffy) of
ok ->
ok;
Err ->
?WARNING_MSG("Failed to start JSON codec (jiffy): ~p. "
"JSON support will be disabled", [Err])
end
end.
get_type(Hdrs) ->
try
{_, S} = lists:keyfind('Content-Type', 1, Hdrs),
[T|_] = str:tokens(S, <<";">>),
[_, <<"json">>] = str:tokens(T, <<"/">>),
json
catch _:_ ->
xml
end.
depends(_Host, _Opts) ->
[].
mod_opt_type(json) ->
fun (false) -> false;
(true) -> true
end;
mod_opt_type(max_concat) ->
fun (unlimited) -> unlimited;
(N) when is_integer(N), N > 0 -> N
end;
mod_opt_type(max_inactivity) ->
fun (I) when is_integer(I), I > 0 -> I end;
mod_opt_type(max_pause) ->
fun (I) when is_integer(I), I > 0 -> I end;
mod_opt_type(prebind) ->
fun (B) when is_boolean(B) -> B end;
mod_opt_type(ram_db_type) ->
fun(T) -> ejabberd_config:v_db(?MODULE, T) end;
mod_opt_type(queue_type) ->
fun(ram) -> ram; (file) -> file end;
mod_opt_type(O) when O == use_cache; O == cache_missed ->
fun(B) when is_boolean(B) -> B end;
mod_opt_type(O) when O == cache_size; O == cache_life_time ->
fun(I) when is_integer(I), I>0 -> I;
(unlimited) -> infinity;
(infinity) -> infinity
end;
mod_opt_type(_) ->
[json, max_concat, max_inactivity, max_pause, prebind, ram_db_type,
queue_type, use_cache, cache_size, cache_missed, cache_life_time].
%%%----------------------------------------------------------------------
%%% Cache stuff
%%%----------------------------------------------------------------------
-spec init_cache(module()) -> ok.
init_cache(Mod) ->
case use_cache(Mod) of
true ->
ets_cache:new(?BOSH_CACHE, cache_opts());
false ->
ets_cache:delete(?BOSH_CACHE)
end.
-spec use_cache(module()) -> boolean().
use_cache(Mod) ->
case erlang:function_exported(Mod, use_cache, 0) of
true -> Mod:use_cache();
false ->
gen_mod:get_module_opt(
global, ?MODULE, use_cache,
ejabberd_config:use_cache(global))
end.
-spec cache_nodes(module()) -> [node()].
cache_nodes(Mod) ->
case erlang:function_exported(Mod, cache_nodes, 0) of
true -> Mod:cache_nodes();
false -> ejabberd_cluster:get_nodes()
end.
-spec delete_cache(module(), binary()) -> ok.
delete_cache(Mod, SID) ->
case use_cache(Mod) of
true ->
ets_cache:delete(?BOSH_CACHE, SID, cache_nodes(Mod));
false ->
ok
end.
-spec cache_opts() -> [proplists:property()].
cache_opts() ->
MaxSize = gen_mod:get_module_opt(
global, ?MODULE, cache_size,
ejabberd_config:cache_size(global)),
CacheMissed = gen_mod:get_module_opt(
global, ?MODULE, cache_missed,
ejabberd_config:cache_missed(global)),
LifeTime = case gen_mod:get_module_opt(
global, ?MODULE, cache_life_time,
ejabberd_config:cache_life_time(global)) of
infinity -> infinity;
I -> timer:seconds(I)
end,
[{max_size, MaxSize}, {cache_missed, CacheMissed}, {life_time, LifeTime}].
-spec clean_cache(node()) -> ok.
clean_cache(Node) ->
ets_cache:filter(
?BOSH_CACHE,
fun(_, error) ->
false;
(_, {ok, Pid}) ->
node(Pid) /= Node
end).
-spec clean_cache() -> ok.
clean_cache() ->
ejabberd_cluster:eval_everywhere(?MODULE, clean_cache, [node()]).
%%%----------------------------------------------------------------------
%%% Help Web Page
%%%----------------------------------------------------------------------
get_human_html_xmlel() ->
Heading = <<"ejabberd ",
(iolist_to_binary(atom_to_list(?MODULE)))/binary>>,
#xmlel{name = <<"html">>,
attrs =
[{<<"xmlns">>, <<"http://www.w3.org/1999/xhtml">>}],
children =
[#xmlel{name = <<"head">>,
children =
[#xmlel{name = <<"title">>,
children = [{xmlcdata, Heading}]},
#xmlel{name = <<"style">>,
children = [{xmlcdata, get_style_cdata()}]}]},
#xmlel{name = <<"body">>,
children =
[#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"container">>}],
children = get_container_children(Heading)}]}]}.
get_container_children(Heading) ->
[#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"section">>}],
children =
[#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"block">>}],
children =
[#xmlel{name = <<"a">>,
attrs = [{<<"href">>, <<"https://www.ejabberd.im">>}],
children =
[#xmlel{name = <<"img">>,
attrs = [{<<"height">>, <<"32">>},
{<<"src">>, get_image_src()}]}]}]}]},
#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"white section">>}],
children =
[#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"block">>}],
children =
[#xmlel{name = <<"h1">>, children = [{xmlcdata, Heading}]},
#xmlel{name = <<"p">>, children =
[{xmlcdata, <<"An implementation of ">>},
#xmlel{name = <<"a">>,
attrs = [{<<"href">>, <<"http://xmpp.org/extensions/xep-0206.html">>}],
children = [{xmlcdata, <<"XMPP over BOSH (XEP-0206)">>}]}]},
#xmlel{name = <<"p">>, children =
[{xmlcdata, <<"This web page is only informative. To "
"use HTTP-Bind you need a Jabber/XMPP "
"client that supports it.">>}]}]}]},
#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"section">>}],
children =
[#xmlel{name = <<"div">>,
attrs = [{<<"class">>, <<"block">>}],
children =
[#xmlel{name = <<"a">>,
attrs = [{<<"href">>, <<"https://www.ejabberd.im">>},
{<<"title">>, <<"ejabberd XMPP server">>}],
children = [{xmlcdata, <<"ejabberd">>}]},
{xmlcdata, <<" is maintained by ">>},
#xmlel{name = <<"a">>,
attrs = [{<<"href">>, <<"https://www.process-one.net">>},
{<<"title">>, <<"ProcessOne - Leader in Instant Messaging and Push Solutions">>}],
children = [{xmlcdata, <<"ProcessOne">>}]} ]}]}
].
get_style_cdata() ->
<<"
body {
margin: 0;
padding: 0;
font-family: sans-serif;
color: #fff;
}
h1 {
font-size: 3em;
color: #444;
}
p {
line-height: 1.5em;
color: #888;
}
a {
color: #fff;
}
a:hover,
a:active {
text-decoration: underline;
}
.container {
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background: #424A55;
background-image: -webkit-linear-gradient(270deg, rgba(48,52,62,0) 24%, #30353e 100%);
background-image: linear-gradient(-180deg, rgba(48,52,62,0) 24%, #30353e 100%);
}
.section {
padding: 3em;
}
.white.section {
background: #fff;
border-bottom: 4px solid #41AFCA;
}
.white.section a {
text-decoration: none;
color: #41AFCA;
}
.white.section a:hover,
.white.section a:active {
text-decoration: underline;
}
.block {
margin: 0 auto;
max-width: 900px;
width: 100%;
}">>.
get_image_src() ->
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">>.
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