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xmpp.chapril.org-ejabberd/src/mod_http_upload.erl

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%%%----------------------------------------------------------------------
%%% File : mod_http_upload.erl
%%% Author : Holger Weiss <holger@zedat.fu-berlin.de>
%%% Purpose : HTTP File Upload (XEP-0363)
%%% Created : 20 Aug 2015 by Holger Weiss <holger@zedat.fu-berlin.de>
%%%
%%%
%%% ejabberd, Copyright (C) 2015-2016 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_http_upload).
-author('holger@zedat.fu-berlin.de').
-protocol({xep, 363, '0.1'}).
-define(GEN_SERVER, gen_server).
-define(SERVICE_REQUEST_TIMEOUT, 5000). % 5 seconds.
-define(SLOT_TIMEOUT, 18000000). % 5 hours.
-define(PROCNAME, ?MODULE).
-define(FORMAT(Error), file:format_error(Error)).
-define(URL_ENC(URL), binary_to_list(ejabberd_http:url_encode(URL))).
-define(ADDR_TO_STR(IP), ejabberd_config:may_hide_data(jlib:ip_to_list(IP))).
-define(STR_TO_INT(Str, B), jlib:binary_to_integer(iolist_to_binary(Str), B)).
-define(DEFAULT_CONTENT_TYPE, <<"application/octet-stream">>).
-define(CONTENT_TYPES,
[{<<".avi">>, <<"video/avi">>},
{<<".bmp">>, <<"image/bmp">>},
{<<".bz2">>, <<"application/x-bzip2">>},
{<<".gif">>, <<"image/gif">>},
{<<".gz">>, <<"application/x-gzip">>},
{<<".jpeg">>, <<"image/jpeg">>},
{<<".jpg">>, <<"image/jpeg">>},
{<<".mp3">>, <<"audio/mpeg">>},
{<<".mp4">>, <<"video/mp4">>},
{<<".mpeg">>, <<"video/mpeg">>},
{<<".mpg">>, <<"video/mpeg">>},
{<<".ogg">>, <<"application/ogg">>},
{<<".pdf">>, <<"application/pdf">>},
{<<".png">>, <<"image/png">>},
{<<".rtf">>, <<"application/rtf">>},
{<<".svg">>, <<"image/svg+xml">>},
{<<".tiff">>, <<"image/tiff">>},
{<<".txt">>, <<"text/plain">>},
{<<".wav">>, <<"audio/wav">>},
{<<".webp">>, <<"image/webp">>},
{<<".xz">>, <<"application/x-xz">>},
{<<".zip">>, <<"application/zip">>}]).
-behaviour(?GEN_SERVER).
-behaviour(gen_mod).
%% gen_mod/supervisor callbacks.
-export([start_link/3,
start/2,
stop/1,
mod_opt_type/1]).
%% gen_server callbacks.
-export([init/1,
handle_call/3,
handle_cast/2,
handle_info/2,
terminate/2,
code_change/3]).
%% ejabberd_http callback.
-export([process/2]).
%% ejabberd_hooks callback.
-export([remove_user/2]).
%% Utility functions.
-export([get_proc_name/2,
expand_home/1,
expand_host/2]).
-include("ejabberd.hrl").
-include("ejabberd_http.hrl").
-include("jlib.hrl").
-include("logger.hrl").
-record(state,
{server_host :: binary(),
host :: binary(),
name :: binary(),
access :: atom(),
max_size :: pos_integer() | infinity,
secret_length :: pos_integer(),
jid_in_url :: sha1 | node,
file_mode :: integer() | undefined,
dir_mode :: integer() | undefined,
docroot :: binary(),
put_url :: binary(),
get_url :: binary(),
service_url :: binary() | undefined,
thumbnail :: boolean(),
slots = #{} :: map()}).
-record(media_info,
{type :: binary(),
height :: integer(),
width :: integer()}).
-type state() :: #state{}.
-type slot() :: [binary(), ...].
-type media_info() :: #media_info{}.
%%--------------------------------------------------------------------
%% gen_mod/supervisor callbacks.
%%--------------------------------------------------------------------
-spec start_link(binary(), atom(), gen_mod:opts())
-> {ok, pid()} | ignore | {error, _}.
start_link(ServerHost, Proc, Opts) ->
?GEN_SERVER:start_link({local, Proc}, ?MODULE, {ServerHost, Opts}, []).
-spec start(binary(), gen_mod:opts()) -> {ok, _} | {ok, _, _} | {error, _}.
start(ServerHost, Opts) ->
case gen_mod:get_opt(rm_on_unregister, Opts,
fun(B) when is_boolean(B) -> B end,
true) of
true ->
ejabberd_hooks:add(remove_user, ServerHost, ?MODULE,
remove_user, 50),
ejabberd_hooks:add(anonymous_purge_hook, ServerHost, ?MODULE,
remove_user, 50);
false ->
ok
end,
Proc = get_proc_name(ServerHost, ?PROCNAME),
Spec = {Proc,
{?MODULE, start_link, [ServerHost, Proc, Opts]},
permanent,
3000,
worker,
[?MODULE]},
supervisor:start_child(ejabberd_sup, Spec).
-spec stop(binary()) -> ok.
stop(ServerHost) ->
case gen_mod:get_module_opt(ServerHost, ?MODULE, rm_on_unregister,
fun(B) when is_boolean(B) -> B end,
true) of
true ->
ejabberd_hooks:delete(remove_user, ServerHost, ?MODULE,
remove_user, 50),
ejabberd_hooks:delete(anonymous_purge_hook, ServerHost, ?MODULE,
remove_user, 50);
false ->
ok
end,
Proc = get_proc_name(ServerHost, ?PROCNAME),
supervisor:terminate_child(ejabberd_sup, Proc),
supervisor:delete_child(ejabberd_sup, Proc).
-spec mod_opt_type(atom()) -> fun((term()) -> term()) | [atom()].
mod_opt_type(host) ->
fun iolist_to_binary/1;
mod_opt_type(name) ->
fun iolist_to_binary/1;
mod_opt_type(access) ->
fun(A) when is_atom(A) -> A end;
mod_opt_type(max_size) ->
fun(I) when is_integer(I), I > 0 -> I;
(infinity) -> infinity
end;
mod_opt_type(secret_length) ->
fun(I) when is_integer(I), I >= 8 -> I end;
mod_opt_type(jid_in_url) ->
fun(sha1) -> sha1;
(node) -> node
end;
mod_opt_type(file_mode) ->
fun(Mode) -> ?STR_TO_INT(Mode, 8) end;
mod_opt_type(dir_mode) ->
fun(Mode) -> ?STR_TO_INT(Mode, 8) end;
mod_opt_type(docroot) ->
fun iolist_to_binary/1;
mod_opt_type(put_url) ->
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end;
mod_opt_type(get_url) ->
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end;
mod_opt_type(service_url) ->
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end;
mod_opt_type(custom_headers) ->
fun(Headers) ->
lists:map(fun({K, V}) ->
{iolist_to_binary(K), iolist_to_binary(V)}
end, Headers)
end;
mod_opt_type(rm_on_unregister) ->
fun(B) when is_boolean(B) -> B end;
mod_opt_type(thumbnail) ->
fun(B) when is_boolean(B) -> B end;
mod_opt_type(_) ->
[host, name, access, max_size, secret_length, jid_in_url, file_mode,
dir_mode, docroot, put_url, get_url, service_url, custom_headers,
rm_on_unregister, thumbnail].
%%--------------------------------------------------------------------
%% gen_server callbacks.
%%--------------------------------------------------------------------
-spec init({binary(), gen_mod:opts()}) -> {ok, state()}.
init({ServerHost, Opts}) ->
process_flag(trap_exit, true),
Host = gen_mod:get_opt_host(ServerHost, Opts, <<"upload.@HOST@">>),
Name = gen_mod:get_opt(name, Opts,
fun iolist_to_binary/1,
<<"HTTP File Upload">>),
Access = gen_mod:get_opt(access, Opts,
fun(A) when is_atom(A) -> A end,
local),
MaxSize = gen_mod:get_opt(max_size, Opts,
fun(I) when is_integer(I), I > 0 -> I;
(infinity) -> infinity
end,
104857600),
SecretLength = gen_mod:get_opt(secret_length, Opts,
fun(I) when is_integer(I), I >= 8 -> I end,
40),
JIDinURL = gen_mod:get_opt(jid_in_url, Opts,
fun(sha1) -> sha1;
(node) -> node
end,
sha1),
DocRoot = gen_mod:get_opt(docroot, Opts,
fun iolist_to_binary/1,
<<"@HOME@/upload">>),
FileMode = gen_mod:get_opt(file_mode, Opts,
fun(Mode) -> ?STR_TO_INT(Mode, 8) end),
DirMode = gen_mod:get_opt(dir_mode, Opts,
fun(Mode) -> ?STR_TO_INT(Mode, 8) end),
PutURL = gen_mod:get_opt(put_url, Opts,
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end,
<<"http://@HOST@:5444">>),
GetURL = gen_mod:get_opt(get_url, Opts,
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end,
PutURL),
ServiceURL = gen_mod:get_opt(service_url, Opts,
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL
end),
Thumbnail = gen_mod:get_opt(thumbnail, Opts,
fun(B) when is_boolean(B) -> B end,
true),
DocRoot1 = expand_home(str:strip(DocRoot, right, $/)),
DocRoot2 = expand_host(DocRoot1, ServerHost),
case ServiceURL of
undefined ->
ok;
<<"http://", _/binary>> ->
application:start(inets);
<<"https://", _/binary>> ->
application:start(inets),
application:start(crypto),
application:start(asn1),
application:start(public_key),
application:start(ssl)
end,
case DirMode of
undefined ->
ok;
Mode ->
file:change_mode(DocRoot2, Mode)
end,
case Thumbnail of
true ->
case string:str(os:cmd("identify"), "Magick") of
0 ->
?ERROR_MSG("Cannot find 'identify' command, please install "
"ImageMagick or disable thumbnail creation", []);
_ ->
ok
end;
false ->
ok
end,
ejabberd_router:register_route(Host, ServerHost),
{ok, #state{server_host = ServerHost, host = Host, name = Name,
access = Access, max_size = MaxSize,
secret_length = SecretLength, jid_in_url = JIDinURL,
file_mode = FileMode, dir_mode = DirMode,
thumbnail = Thumbnail,
docroot = DocRoot2,
put_url = expand_host(str:strip(PutURL, right, $/), ServerHost),
get_url = expand_host(str:strip(GetURL, right, $/), ServerHost),
service_url = ServiceURL}}.
-spec handle_call(_, {pid(), _}, state())
-> {reply, {ok, pos_integer(), binary(),
pos_integer() | undefined,
pos_integer() | undefined}, state()} |
{reply, {error, binary()}, state()} | {noreply, state()}.
handle_call({use_slot, Slot}, _From, #state{file_mode = FileMode,
dir_mode = DirMode,
get_url = GetPrefix,
thumbnail = Thumbnail,
docroot = DocRoot} = State) ->
case get_slot(Slot, State) of
{ok, {Size, Timer}} ->
timer:cancel(Timer),
NewState = del_slot(Slot, State),
Path = str:join([DocRoot | Slot], <<$/>>),
{reply, {ok, Size, Path, FileMode, DirMode, GetPrefix, Thumbnail},
NewState};
error ->
{reply, {error, <<"Invalid slot">>}, State}
end;
handle_call(get_docroot, _From, #state{docroot = DocRoot} = State) ->
{reply, {ok, DocRoot}, State};
handle_call(Request, From, State) ->
?ERROR_MSG("Got unexpected request from ~p: ~p", [From, Request]),
{noreply, State}.
-spec handle_cast(_, state()) -> {noreply, state()}.
handle_cast(Request, State) ->
?ERROR_MSG("Got unexpected request: ~p", [Request]),
{noreply, State}.
-spec handle_info(timeout | _, state()) -> {noreply, state()}.
handle_info({route, From, To, #xmlel{name = <<"iq">>} = Stanza}, State) ->
Request = jlib:iq_query_info(Stanza),
{Reply, NewState} = case process_iq(From, Request, State) of
R when is_record(R, iq) ->
{R, State};
{R, S} ->
{R, S};
not_request ->
{none, State}
end,
if Reply /= none ->
ejabberd_router:route(To, From, jlib:iq_to_xml(Reply));
true ->
ok
end,
{noreply, NewState};
handle_info({slot_timed_out, Slot}, State) ->
NewState = del_slot(Slot, State),
{noreply, NewState};
handle_info(Info, State) ->
?ERROR_MSG("Got unexpected info: ~p", [Info]),
{noreply, State}.
-spec terminate(normal | shutdown | {shutdown, _} | _, _) -> ok.
terminate(Reason, #state{server_host = ServerHost, host = Host}) ->
?DEBUG("Stopping HTTP upload process for ~s: ~p", [ServerHost, Reason]),
ejabberd_router:unregister_route(Host),
ok.
-spec code_change({down, _} | _, state(), _) -> {ok, state()}.
code_change(_OldVsn, #state{server_host = ServerHost} = State, _Extra) ->
?DEBUG("Updating HTTP upload process for ~s", [ServerHost]),
{ok, State}.
%%--------------------------------------------------------------------
%% ejabberd_http callback.
%%--------------------------------------------------------------------
-spec process([binary()], #request{})
-> {pos_integer(), [{binary(), binary()}], binary()}.
process(LocalPath, #request{method = Method, host = Host, ip = IP})
when length(LocalPath) < 3,
Method == 'PUT' orelse
Method == 'GET' orelse
Method == 'HEAD' ->
?DEBUG("Rejecting ~s request from ~s for ~s: Too few path components",
[Method, ?ADDR_TO_STR(IP), Host]),
http_response(Host, 404);
process(_LocalPath, #request{method = 'PUT', host = Host, ip = IP,
data = Data} = Request) ->
{Proc, Slot} = parse_http_request(Request),
case catch gen_server:call(Proc, {use_slot, Slot}) of
{ok, Size, Path, FileMode, DirMode, GetPrefix, Thumbnail}
when byte_size(Data) == Size ->
?DEBUG("Storing file from ~s for ~s: ~s",
[?ADDR_TO_STR(IP), Host, Path]),
case store_file(Path, Data, FileMode, DirMode,
GetPrefix, Slot, Thumbnail) of
ok ->
http_response(Host, 201);
{ok, Headers, OutData} ->
http_response(Host, 201, Headers, OutData);
{error, Error} ->
?ERROR_MSG("Cannot store file ~s from ~s for ~s: ~p",
[Path, ?ADDR_TO_STR(IP), Host, ?FORMAT(Error)]),
http_response(Host, 500)
end;
{ok, Size, Path, _FileMode, _DirMode, _GetPrefix, _Thumbnail} ->
?INFO_MSG("Rejecting file ~s from ~s for ~s: Size is ~B, not ~B",
[Path, ?ADDR_TO_STR(IP), Host, byte_size(Data), Size]),
http_response(Host, 413);
{error, Error} ->
?INFO_MSG("Rejecting file from ~s for ~s: ~p",
[?ADDR_TO_STR(IP), Host, Error]),
http_response(Host, 403);
Error ->
?ERROR_MSG("Cannot handle PUT request from ~s for ~s: ~p",
[?ADDR_TO_STR(IP), Host, Error]),
http_response(Host, 500)
end;
process(_LocalPath, #request{method = Method, host = Host, ip = IP} = Request)
when Method == 'GET';
Method == 'HEAD' ->
{Proc, [_UserDir, _RandDir, FileName] = Slot} = parse_http_request(Request),
case catch gen_server:call(Proc, get_docroot) of
{ok, DocRoot} ->
Path = str:join([DocRoot | Slot], <<$/>>),
case file:read_file(Path) of
{ok, Data} ->
?INFO_MSG("Serving ~s to ~s", [Path, ?ADDR_TO_STR(IP)]),
ContentType = guess_content_type(FileName),
Headers1 = case ContentType of
<<"image/", _SubType/binary>> -> [];
<<"text/", _SubType/binary>> -> [];
_ ->
[{<<"Content-Disposition">>,
<<"attachment; filename=",
$", FileName/binary, $">>}]
end,
Headers2 = [{<<"Content-Type">>, ContentType} | Headers1],
http_response(Host, 200, Headers2, Data);
{error, eacces} ->
?INFO_MSG("Cannot serve ~s to ~s: Permission denied",
[Path, ?ADDR_TO_STR(IP)]),
http_response(Host, 403);
{error, enoent} ->
?INFO_MSG("Cannot serve ~s to ~s: No such file",
[Path, ?ADDR_TO_STR(IP)]),
http_response(Host, 404);
{error, eisdir} ->
?INFO_MSG("Cannot serve ~s to ~s: Is a directory",
[Path, ?ADDR_TO_STR(IP)]),
http_response(Host, 404);
{error, Error} ->
?INFO_MSG("Cannot serve ~s to ~s: ~s",
[Path, ?ADDR_TO_STR(IP), ?FORMAT(Error)]),
http_response(Host, 500)
end;
Error ->
?ERROR_MSG("Cannot handle ~s request from ~s for ~s: ~p",
[Method, ?ADDR_TO_STR(IP), Host, Error]),
http_response(Host, 500)
end;
process(_LocalPath, #request{method = 'OPTIONS', host = Host, ip = IP}) ->
?DEBUG("Responding to OPTIONS request from ~s for ~s",
[?ADDR_TO_STR(IP), Host]),
http_response(Host, 200);
process(_LocalPath, #request{method = Method, host = Host, ip = IP}) ->
?DEBUG("Rejecting ~s request from ~s for ~s",
[Method, ?ADDR_TO_STR(IP), Host]),
http_response(Host, 405, [{<<"Allow">>, <<"OPTIONS, HEAD, GET, PUT">>}]).
%%--------------------------------------------------------------------
%% Exported utility functions.
%%--------------------------------------------------------------------
-spec get_proc_name(binary(), atom()) -> atom().
get_proc_name(ServerHost, ModuleName) ->
PutURL = gen_mod:get_module_opt(ServerHost, ?MODULE, put_url,
fun(<<"http://", _/binary>> = URL) -> URL;
(<<"https://", _/binary>> = URL) -> URL;
(_) -> <<"http://@HOST@">>
end,
<<"http://@HOST@">>),
{ok, {_Scheme, _UserInfo, Host, _Port, Path, _Query}} =
http_uri:parse(binary_to_list(expand_host(PutURL, ServerHost))),
ProcPrefix = list_to_binary(string:strip(Host ++ Path, right, $/)),
gen_mod:get_module_proc(ProcPrefix, ModuleName).
-spec expand_home(binary()) -> binary().
expand_home(Subject) ->
{ok, [[Home]]} = init:get_argument(home),
Parts = binary:split(Subject, <<"@HOME@">>, [global]),
str:join(Parts, list_to_binary(Home)).
-spec expand_host(binary(), binary()) -> binary().
expand_host(Subject, Host) ->
Parts = binary:split(Subject, <<"@HOST@">>, [global]),
str:join(Parts, Host).
%%--------------------------------------------------------------------
%% Internal functions.
%%--------------------------------------------------------------------
%% XMPP request handling.
-spec process_iq(jid(), iq_request() | reply | invalid, state())
-> {iq_reply(), state()} | iq_reply() | not_request.
process_iq(_From,
#iq{type = get, xmlns = ?NS_DISCO_INFO, lang = Lang} = IQ,
#state{server_host = ServerHost, name = Name}) ->
AddInfo = ejabberd_hooks:run_fold(disco_info, ServerHost, [],
[ServerHost, ?MODULE, <<"">>, <<"">>]),
IQ#iq{type = result,
sub_el = [#xmlel{name = <<"query">>,
attrs = [{<<"xmlns">>, ?NS_DISCO_INFO}],
children = iq_disco_info(ServerHost, Lang, Name)
++ AddInfo}]};
process_iq(From,
#iq{type = get, xmlns = XMLNS, lang = Lang, sub_el = SubEl} = IQ,
#state{server_host = ServerHost, access = Access} = State)
when XMLNS == ?NS_HTTP_UPLOAD;
XMLNS == ?NS_HTTP_UPLOAD_OLD ->
case acl:match_rule(ServerHost, Access, From) of
allow ->
case parse_request(SubEl, Lang) of
{ok, File, Size, ContentType} ->
case create_slot(State, From, File, Size, ContentType,
Lang) of
{ok, Slot} ->
{ok, Timer} = timer:send_after(?SLOT_TIMEOUT,
{slot_timed_out,
Slot}),
NewState = add_slot(Slot, Size, Timer, State),
SlotEl = slot_el(Slot, State, XMLNS),
{IQ#iq{type = result, sub_el = [SlotEl]}, NewState};
{ok, PutURL, GetURL} ->
SlotEl = slot_el(PutURL, GetURL, XMLNS),
IQ#iq{type = result, sub_el = [SlotEl]};
{error, Error} ->
IQ#iq{type = error, sub_el = [SubEl, Error]}
end;
{error, Error} ->
?DEBUG("Cannot parse request from ~s",
[jid:to_string(From)]),
IQ#iq{type = error, sub_el = [SubEl, Error]}
end;
deny ->
?DEBUG("Denying HTTP upload slot request from ~s",
[jid:to_string(From)]),
IQ#iq{type = error, sub_el = [SubEl, ?ERR_FORBIDDEN]}
end;
process_iq(_From, #iq{sub_el = SubEl} = IQ, _State) ->
IQ#iq{type = error, sub_el = [SubEl, ?ERR_NOT_ALLOWED]};
process_iq(_From, reply, _State) ->
not_request;
process_iq(_From, invalid, _State) ->
not_request.
-spec parse_request(xmlel(), binary())
-> {ok, binary(), pos_integer(), binary()} | {error, xmlel()}.
parse_request(#xmlel{name = <<"request">>, attrs = Attrs} = Request, Lang) ->
case fxml:get_attr(<<"xmlns">>, Attrs) of
{value, XMLNS} when XMLNS == ?NS_HTTP_UPLOAD;
XMLNS == ?NS_HTTP_UPLOAD_OLD ->
case {fxml:get_subtag_cdata(Request, <<"filename">>),
fxml:get_subtag_cdata(Request, <<"size">>),
fxml:get_subtag_cdata(Request, <<"content-type">>)} of
{File, SizeStr, ContentType} when byte_size(File) > 0 ->
case catch jlib:binary_to_integer(SizeStr) of
Size when is_integer(Size), Size > 0 ->
{ok, File, Size, yield_content_type(ContentType)};
_ ->
Text = <<"Please specify file size.">>,
{error, ?ERRT_BAD_REQUEST(Lang, Text)}
end;
_ ->
Text = <<"Please specify file name.">>,
{error, ?ERRT_BAD_REQUEST(Lang, Text)}
end;
_ ->
{error, ?ERR_BAD_REQUEST}
end;
parse_request(_El, _Lang) -> {error, ?ERR_BAD_REQUEST}.
-spec create_slot(state(), jid(), binary(), pos_integer(), binary(), binary())
-> {ok, slot()} | {ok, binary(), binary()} | {error, xmlel()}.
create_slot(#state{service_url = undefined, max_size = MaxSize},
JID, File, Size, _ContentType, Lang) when MaxSize /= infinity,
Size > MaxSize ->
Text = <<"File larger than ", (jlib:integer_to_binary(MaxSize))/binary,
" Bytes.">>,
?INFO_MSG("Rejecting file ~s from ~s (too large: ~B bytes)",
[File, jid:to_string(JID), Size]),
{error, ?ERRT_NOT_ACCEPTABLE(Lang, Text)};
create_slot(#state{service_url = undefined,
jid_in_url = JIDinURL,
secret_length = SecretLength,
server_host = ServerHost,
docroot = DocRoot},
JID, File, Size, _ContentType, Lang) ->
UserStr = make_user_string(JID, JIDinURL),
UserDir = <<DocRoot/binary, $/, UserStr/binary>>,
case ejabberd_hooks:run_fold(http_upload_slot_request, ServerHost, allow,
[JID, UserDir, Size, Lang]) of
allow ->
RandStr = make_rand_string(SecretLength),
FileStr = make_file_string(File),
?INFO_MSG("Got HTTP upload slot for ~s (file: ~s)",
[jid:to_string(JID), File]),
{ok, [UserStr, RandStr, FileStr]};
deny ->
{error, ?ERR_SERVICE_UNAVAILABLE};
#xmlel{} = Error ->
{error, Error}
end;
create_slot(#state{service_url = ServiceURL},
#jid{luser = U, lserver = S} = JID, File, Size, ContentType,
_Lang) ->
Options = [{body_format, binary}, {full_result, false}],
HttpOptions = [{timeout, ?SERVICE_REQUEST_TIMEOUT}],
SizeStr = jlib:integer_to_binary(Size),
GetRequest = binary_to_list(ServiceURL) ++
"?jid=" ++ ?URL_ENC(jid:to_string({U, S, <<"">>})) ++
"&name=" ++ ?URL_ENC(File) ++
"&size=" ++ ?URL_ENC(SizeStr) ++
"&content_type=" ++ ?URL_ENC(ContentType),
case httpc:request(get, {GetRequest, []}, HttpOptions, Options) of
{ok, {Code, Body}} when Code >= 200, Code =< 299 ->
case binary:split(Body, <<$\n>>, [global, trim]) of
[<<"http", _/binary>> = PutURL,
<<"http", _/binary>> = GetURL] ->
?INFO_MSG("Got HTTP upload slot for ~s (file: ~s)",
[jid:to_string(JID), File]),
{ok, PutURL, GetURL};
Lines ->
?ERROR_MSG("Can't parse data received for ~s from <~s>: ~p",
[jid:to_string(JID), ServiceURL, Lines]),
{error, ?ERR_SERVICE_UNAVAILABLE}
end;
{ok, {402, _Body}} ->
?INFO_MSG("Got status code 402 for ~s from <~s>",
[jid:to_string(JID), ServiceURL]),
{error, ?ERR_RESOURCE_CONSTRAINT};
{ok, {403, _Body}} ->
?INFO_MSG("Got status code 403 for ~s from <~s>",
[jid:to_string(JID), ServiceURL]),
{error, ?ERR_NOT_ALLOWED};
{ok, {413, _Body}} ->
?INFO_MSG("Got status code 413 for ~s from <~s>",
[jid:to_string(JID), ServiceURL]),
{error, ?ERR_NOT_ACCEPTABLE};
{ok, {Code, _Body}} ->
?ERROR_MSG("Got unexpected status code for ~s from <~s>: ~B",
[jid:to_string(JID), ServiceURL, Code]),
{error, ?ERR_SERVICE_UNAVAILABLE};
{error, Reason} ->
?ERROR_MSG("Error requesting upload slot for ~s from <~s>: ~p",
[jid:to_string(JID), ServiceURL, Reason]),
{error, ?ERR_SERVICE_UNAVAILABLE}
end.
-spec add_slot(slot(), pos_integer(), timer:tref(), state()) -> state().
add_slot(Slot, Size, Timer, #state{slots = Slots} = State) ->
NewSlots = maps:put(Slot, {Size, Timer}, Slots),
State#state{slots = NewSlots}.
-spec get_slot(slot(), state()) -> {ok, {pos_integer(), timer:tref()}} | error.
get_slot(Slot, #state{slots = Slots}) ->
maps:find(Slot, Slots).
-spec del_slot(slot(), state()) -> state().
del_slot(Slot, #state{slots = Slots} = State) ->
NewSlots = maps:remove(Slot, Slots),
State#state{slots = NewSlots}.
-spec slot_el(slot() | binary(), state() | binary(), binary()) -> xmlel().
slot_el(Slot, #state{put_url = PutPrefix, get_url = GetPrefix}, XMLNS) ->
PutURL = str:join([PutPrefix | Slot], <<$/>>),
GetURL = str:join([GetPrefix | Slot], <<$/>>),
slot_el(PutURL, GetURL, XMLNS);
slot_el(PutURL, GetURL, XMLNS) ->
#xmlel{name = <<"slot">>,
attrs = [{<<"xmlns">>, XMLNS}],
children = [#xmlel{name = <<"put">>,
children = [{xmlcdata, PutURL}]},
#xmlel{name = <<"get">>,
children = [{xmlcdata, GetURL}]}]}.
-spec make_user_string(jid(), sha1 | node) -> binary().
make_user_string(#jid{luser = U, lserver = S}, sha1) ->
p1_sha:sha(<<U/binary, $@, S/binary>>);
make_user_string(#jid{luser = U}, node) ->
re:replace(U, <<"[^a-zA-Z0-9_.-]">>, <<$_>>, [global, {return, binary}]).
-spec make_file_string(binary()) -> binary().
make_file_string(File) ->
re:replace(File, <<"[^a-zA-Z0-9_.-]">>, <<$_>>, [global, {return, binary}]).
-spec make_rand_string(non_neg_integer()) -> binary().
make_rand_string(Length) ->
list_to_binary(make_rand_string([], Length)).
-spec make_rand_string(string(), non_neg_integer()) -> string().
make_rand_string(S, 0) -> S;
make_rand_string(S, N) -> make_rand_string([make_rand_char() | S], N - 1).
-spec make_rand_char() -> char().
make_rand_char() ->
map_int_to_char(crypto:rand_uniform(0, 62)).
-spec map_int_to_char(0..61) -> char().
map_int_to_char(N) when N =< 9 -> N + 48; % Digit.
map_int_to_char(N) when N =< 35 -> N + 55; % Upper-case character.
map_int_to_char(N) when N =< 61 -> N + 61. % Lower-case character.
-spec yield_content_type(binary()) -> binary().
yield_content_type(<<"">>) -> ?DEFAULT_CONTENT_TYPE;
yield_content_type(Type) -> Type.
-spec iq_disco_info(binary(), binary(), binary()) -> [xmlel()].
iq_disco_info(Host, Lang, Name) ->
Form = case gen_mod:get_module_opt(Host, ?MODULE, max_size,
fun(I) when is_integer(I), I > 0 -> I;
(infinity) -> infinity
end,
104857600) of
infinity ->
[];
MaxSize ->
MaxSizeStr = jlib:integer_to_binary(MaxSize),
Fields = [#xmlel{name = <<"field">>,
attrs = [{<<"type">>, <<"hidden">>},
{<<"var">>, <<"FORM_TYPE">>}],
children = [#xmlel{name = <<"value">>,
children =
[{xmlcdata,
?NS_HTTP_UPLOAD}]}]},
#xmlel{name = <<"field">>,
attrs = [{<<"var">>, <<"max-file-size">>}],
children = [#xmlel{name = <<"value">>,
children =
[{xmlcdata,
MaxSizeStr}]}]}],
[#xmlel{name = <<"x">>,
attrs = [{<<"xmlns">>, ?NS_XDATA},
{<<"type">>, <<"result">>}],
children = Fields}]
end,
[#xmlel{name = <<"identity">>,
attrs = [{<<"category">>, <<"store">>},
{<<"type">>, <<"file">>},
{<<"name">>, translate:translate(Lang, Name)}]},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_HTTP_UPLOAD}]},
#xmlel{name = <<"feature">>,
attrs = [{<<"var">>, ?NS_HTTP_UPLOAD_OLD}]} | Form].
%% HTTP request handling.
-spec parse_http_request(#request{}) -> {atom(), slot()}.
parse_http_request(#request{host = Host, path = Path}) ->
PrefixLength = length(Path) - 3,
{ProcURL, Slot} = if PrefixLength > 0 ->
Prefix = lists:sublist(Path, PrefixLength),
{str:join([Host | Prefix], $/),
lists:nthtail(PrefixLength, Path)};
true ->
{Host, Path}
end,
{gen_mod:get_module_proc(ProcURL, ?PROCNAME), Slot}.
-spec store_file(binary(), binary(),
integer() | undefined,
integer() | undefined,
binary(), slot(), boolean())
-> ok | {ok, [{binary(), binary()}], binary()} | {error, term()}.
store_file(Path, Data, FileMode, DirMode, GetPrefix, Slot, Thumbnail) ->
case do_store_file(Path, Data, FileMode, DirMode) of
ok when Thumbnail ->
case identify(Path) of
{ok, MediaInfo} ->
case convert(Path, MediaInfo) of
{ok, OutPath} ->
[UserDir, RandDir | _] = Slot,
FileName = filename:basename(OutPath),
URL = str:join([GetPrefix, UserDir,
RandDir, FileName], <<$/>>),
ThumbEl = thumb_el(OutPath, URL),
{ok,
[{<<"Content-Type">>,
<<"text/xml; charset=utf-8">>}],
fxml:element_to_binary(ThumbEl)};
pass ->
ok
end;
pass ->
ok
end;
ok ->
ok;
Err ->
Err
end.
-spec do_store_file(file:filename_all(), binary(),
integer() | undefined,
integer() | undefined)
-> ok | {error, term()}.
do_store_file(Path, Data, FileMode, DirMode) ->
try
ok = filelib:ensure_dir(Path),
{ok, Io} = file:open(Path, [write, exclusive, raw]),
Ok = file:write(Io, Data),
ok = file:close(Io),
if is_integer(FileMode) ->
ok = file:change_mode(Path, FileMode);
FileMode == undefined ->
ok
end,
if is_integer(DirMode) ->
RandDir = filename:dirname(Path),
UserDir = filename:dirname(RandDir),
ok = file:change_mode(RandDir, DirMode),
ok = file:change_mode(UserDir, DirMode);
DirMode == undefined ->
ok
end,
ok = Ok % Raise an exception if file:write/2 failed.
catch
_:{badmatch, {error, Error}} ->
{error, Error};
_:Error ->
{error, Error}
end.
-spec guess_content_type(binary()) -> binary().
guess_content_type(FileName) ->
mod_http_fileserver:content_type(FileName,
?DEFAULT_CONTENT_TYPE,
?CONTENT_TYPES).
-spec http_response(binary(), 100..599)
-> {pos_integer(), [{binary(), binary()}], binary()}.
http_response(Host, Code) ->
http_response(Host, Code, []).
-spec http_response(binary(), 100..599, [{binary(), binary()}])
-> {pos_integer(), [{binary(), binary()}], binary()}.
http_response(Host, Code, ExtraHeaders) ->
Message = <<(code_to_message(Code))/binary, $\n>>,
http_response(Host, Code, ExtraHeaders, Message).
-spec http_response(binary(), 100..599, [{binary(), binary()}], binary())
-> {pos_integer(), [{binary(), binary()}], binary()}.
http_response(Host, Code, ExtraHeaders, Body) ->
ServerHeader = {<<"Server">>, <<"ejabberd ", (?VERSION)/binary>>},
CustomHeaders =
gen_mod:get_module_opt(Host, ?MODULE, custom_headers,
fun(Headers) ->
lists:map(fun({K, V}) ->
{iolist_to_binary(K),
iolist_to_binary(V)}
end, Headers)
end,
[]),
Headers = case proplists:is_defined(<<"Content-Type">>, ExtraHeaders) of
true ->
[ServerHeader | ExtraHeaders];
false ->
[ServerHeader, {<<"Content-Type">>, <<"text/plain">>} |
ExtraHeaders]
end ++ CustomHeaders,
{Code, Headers, Body}.
-spec code_to_message(100..599) -> binary().
code_to_message(201) -> <<"Upload successful.">>;
code_to_message(403) -> <<"Forbidden.">>;
code_to_message(404) -> <<"Not found.">>;
code_to_message(405) -> <<"Method not allowed.">>;
code_to_message(413) -> <<"File size doesn't match requested size.">>;
code_to_message(500) -> <<"Internal server error.">>;
code_to_message(_Code) -> <<"">>.
%%--------------------------------------------------------------------
%% Image manipulation stuff.
%%--------------------------------------------------------------------
-spec identify(binary()) -> {ok, media_info()} | pass.
identify(Path) ->
Cmd = io_lib:format("identify -format 'ok %m %h %w' ~s", [Path]),
Res = string:strip(os:cmd(Cmd), right, $\n),
case string:tokens(Res, " ") of
["ok", T, H, W] ->
{ok, #media_info{type = list_to_binary(string:to_lower(T)),
height = list_to_integer(H),
width = list_to_integer(W)}};
_ ->
?DEBUG("Cannot identify type of ~s: ~s", [Path, Res]),
pass
end.
-spec convert(binary(), media_info()) -> {ok, binary()} | pass.
convert(Path, #media_info{type = T, width = W, height = H}) ->
if W * H >= 25000000 ->
?DEBUG("The image ~s is more than 25 Mpix", [Path]),
pass;
W =< 300, H =< 300 ->
{ok, Path};
T == <<"gif">>; T == <<"jpeg">>; T == <<"png">>; T == <<"webp">> ->
Dir = filename:dirname(Path),
FileName = <<(randoms:get_string())/binary, $., T/binary>>,
OutPath = filename:join(Dir, FileName),
Cmd = io_lib:format("convert -resize 300 ~s ~s", [Path, OutPath]),
case os:cmd(Cmd) of
"" ->
{ok, OutPath};
Err ->
?ERROR_MSG("Failed to convert ~s to ~s: ~s",
[Path, OutPath, string:strip(Err, right, $\n)]),
pass
end;
true ->
?DEBUG("Won't call 'convert' for unknown type ~s", [T]),
pass
end.
-spec thumb_el(binary(), binary()) -> xmlel().
thumb_el(Path, URI) ->
ContentType = guess_content_type(Path),
case identify(Path) of
{ok, #media_info{height = H, width = W}} ->
#xmlel{name = <<"thumbnail">>,
attrs = [{<<"xmlns">>, ?NS_THUMBS_1},
{<<"media-type">>, ContentType},
{<<"uri">>, URI},
{<<"height">>, jlib:integer_to_binary(H)},
{<<"width">>, jlib:integer_to_binary(W)}]};
pass ->
#xmlel{name = <<"thumbnail">>,
attrs = [{<<"xmlns">>, ?NS_THUMBS_1},
{<<"uri">>, URI},
{<<"media-type">>, ContentType}]}
end.
%%--------------------------------------------------------------------
%% Remove user.
%%--------------------------------------------------------------------
-spec remove_user(binary(), binary()) -> ok.
remove_user(User, Server) ->
ServerHost = jid:nameprep(Server),
DocRoot = gen_mod:get_module_opt(ServerHost, ?MODULE, docroot,
fun iolist_to_binary/1,
<<"@HOME@/upload">>),
JIDinURL = gen_mod:get_module_opt(ServerHost, ?MODULE, jid_in_url,
fun(sha1) -> sha1;
(node) -> node
end,
sha1),
DocRoot1 = expand_host(expand_home(DocRoot), ServerHost),
UserStr = make_user_string(jid:make(User, Server, <<"">>), JIDinURL),
UserDir = str:join([DocRoot1, UserStr], <<$/>>),
case del_tree(UserDir) of
ok ->
?INFO_MSG("Removed HTTP upload directory of ~s@~s", [User, Server]);
{error, enoent} ->
?DEBUG("Found no HTTP upload directory of ~s@~s", [User, Server]);
{error, Error} ->
?ERROR_MSG("Cannot remove HTTP upload directory of ~s@~s: ~p",
[User, Server, ?FORMAT(Error)])
end,
ok.
-spec del_tree(file:filename_all()) -> ok | {error, term()}.
del_tree(Dir) when is_binary(Dir) ->
del_tree(binary_to_list(Dir));
del_tree(Dir) ->
try
{ok, Entries} = file:list_dir(Dir),
lists:foreach(fun(Path) ->
case filelib:is_dir(Path) of
true ->
ok = del_tree(Path);
false ->
ok = file:delete(Path)
end
end, [Dir ++ "/" ++ Entry || Entry <- Entries]),
ok = file:del_dir(Dir)
catch
_:{badmatch, {error, Error}} ->
{error, Error};
_:Error ->
{error, Error}
end.
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