Chapril/xmpp.chapril.org-ejabberd
25
1
Fork 0
mirror of https://github.com/processone/ejabberd.git synced 2024-11-22 16:20:52 +01:00
Code Releases Activity
522a186a38
xmpp.chapril.org-ejabberd/src/mod_http_api.erl
Evgeniy Khramtsov f91f2bc3d2 Rewrite several modules to use XML generator
2016-07-29 13:21:00 +03:00

512 lines
17 KiB
Erlang
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

%%%----------------------------------------------------------------------
%%% File : mod_http_api.erl
%%% Author : Christophe romain <christophe.romain@process-one.net>
%%% Purpose : Implements REST API for ejabberd using JSON data
%%% Created : 15 Sep 2014 by Christophe Romain <christophe.romain@process-one.net>
%%%
%%%
%%% ejabberd, Copyright (C) 2002-2016 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.
%%%
%%%----------------------------------------------------------------------
%% Example config:
%%
%% in ejabberd_http listener
%% request_handlers:
%% "/api": mod_http_api
%%
%% To use a specific API version N, add a vN element in the URL path:
%% in ejabberd_http listener
%% request_handlers:
%% "/api/v2": mod_http_api
%%
%% Access rights are defined with:
%% commands_admin_access: configure
%% commands:
%% - add_commands: user
%%
%%
%% add_commands allow exporting a class of commands, from
%% open: methods is not risky and can be called by without any access check
%% restricted (default): the same, but will appear only in ejabberdctl list.
%% admin – auth is required with XMLRPC and HTTP API and checked for admin priviledges, works as usual in ejabberdctl.
%% user - can be used through XMLRPC and HTTP API, even by user. Only admin can use the commands for other users.
%%
%% Then to perform an action, send a POST request to the following URL:
%% http://localhost:5280/api/<call_name>
%%
%% It's also possible to enable unrestricted access to some commands from group
%% of IP addresses by using option `admin_ip_access` by having fragment like
%% this in configuration file:
%% modules:
%% mod_http_api:
%% admin_ip_access: admin_ip_access_rule
%%...
%% access:
%% admin_ip_access_rule:
%% admin_ip_acl:
%% - command1
%% - command2
%% %% use `all` to give access to all commands
%%...
%% acl:
%% admin_ip_acl:
%% ip:
%% - "127.0.0.1/8"
-module(mod_http_api).
-author('cromain@process-one.net').
-behaviour(gen_mod).
-export([start/2, stop/1, process/2, mod_opt_type/1, depends/2]).
-include("ejabberd.hrl").
-include("xmpp.hrl").
-include("logger.hrl").
-include("ejabberd_http.hrl").
-define(DEFAULT_API_VERSION, 0).
-define(CT_PLAIN,
{<<"Content-Type">>, <<"text/plain">>}).
-define(CT_XML,
{<<"Content-Type">>, <<"text/xml; charset=utf-8">>}).
-define(CT_JSON,
{<<"Content-Type">>, <<"application/json">>}).
-define(AC_ALLOW_ORIGIN,
{<<"Access-Control-Allow-Origin">>, <<"*">>}).
-define(AC_ALLOW_METHODS,
{<<"Access-Control-Allow-Methods">>,
<<"GET, POST, OPTIONS">>}).
-define(AC_ALLOW_HEADERS,
{<<"Access-Control-Allow-Headers">>,
<<"Content-Type">>}).
-define(AC_MAX_AGE,
{<<"Access-Control-Max-Age">>, <<"86400">>}).
-define(OPTIONS_HEADER,
[?CT_PLAIN, ?AC_ALLOW_ORIGIN, ?AC_ALLOW_METHODS,
?AC_ALLOW_HEADERS, ?AC_MAX_AGE]).
-define(HEADER(CType),
[CType, ?AC_ALLOW_ORIGIN, ?AC_ALLOW_HEADERS]).
%% -------------------
%% Module control
%% -------------------
start(_Host, _Opts) ->
ok.
stop(_Host) ->
ok.
depends(_Host, _Opts) ->
[].
%% ----------
%% basic auth
%% ----------
check_permissions(Request, Command) ->
case catch binary_to_existing_atom(Command, utf8) of
Call when is_atom(Call) ->
{ok, CommandPolicy} = ejabberd_commands:get_command_policy(Call),
check_permissions2(Request, Call, CommandPolicy);
_ ->
unauthorized_response()
end.
check_permissions2(#request{auth = HTTPAuth, headers = Headers}, Call, _)
when HTTPAuth /= undefined ->
Admin =
case lists:keysearch(<<"X-Admin">>, 1, Headers) of
{value, {_, <<"true">>}} -> true;
_ -> false
end,
Auth =
case HTTPAuth of
{SJID, Pass} ->
case jid:from_string(SJID) of
#jid{user = User, server = Server} ->
case ejabberd_auth:check_password(User, <<"">>, Server, Pass) of
true -> {ok, {User, Server, Pass, Admin}};
false -> false
end;
_ ->
false
end;
{oauth, Token, _} ->
case oauth_check_token(Call, Token) of
{ok, user, {User, Server}} ->
{ok, {User, Server, {oauth, Token}, Admin}};
{ok, server_admin} -> %% token whas generated using issue_token command line
{ok, admin};
false ->
false
end;
_ ->
false
end,
case Auth of
{ok, A} -> {allowed, Call, A};
_ -> unauthorized_response()
end;
check_permissions2(_Request, Call, open) ->
{allowed, Call, noauth};
check_permissions2(#request{ip={IP, _Port}}, Call, _Policy) ->
Access = gen_mod:get_module_opt(global, ?MODULE, admin_ip_access,
fun(V) -> V end,
none),
Res = acl:match_rule(global, Access, IP),
case Res of
all ->
{allowed, Call, admin};
[all] ->
{allowed, Call, admin};
allow ->
{allowed, Call, admin};
Commands when is_list(Commands) ->
case lists:member(Call, Commands) of
true -> {allowed, Call, admin};
_ -> unauthorized_response()
end;
_E ->
{allowed, Call, noauth}
end;
check_permissions2(_Request, _Call, _Policy) ->
unauthorized_response().
oauth_check_token(Scope, Token) when is_atom(Scope) ->
oauth_check_token(atom_to_binary(Scope, utf8), Token);
oauth_check_token(Scope, Token) ->
ejabberd_oauth:check_token(Scope, Token).
%% ------------------
%% command processing
%% ------------------
%process(Call, Request) ->
% ?DEBUG("~p~n~p", [Call, Request]), ok;
process(_, #request{method = 'POST', data = <<>>}) ->
?DEBUG("Bad Request: no data", []),
badrequest_response(<<"Missing POST data">>);
process([Call], #request{method = 'POST', data = Data, ip = {IP, _} = IPPort} = Req) ->
Version = get_api_version(Req),
try
Args = case jiffy:decode(Data) of
List when is_list(List) -> List;
{List} when is_list(List) -> List;
Other -> [Other]
end,
log(Call, Args, IPPort),
case check_permissions(Req, Call) of
{allowed, Cmd, Auth} ->
{Code, Result} = handle(Cmd, Auth, Args, Version, IP),
json_response(Code, jiffy:encode(Result));
%% Warning: check_permission direcly formats 401 reply if not authorized
ErrorResponse ->
ErrorResponse
end
catch _:{error,{_,invalid_json}} = _Err ->
?DEBUG("Bad Request: ~p", [_Err]),
badrequest_response(<<"Invalid JSON input">>);
_:_Error ->
?DEBUG("Bad Request: ~p ~p", [_Error, erlang:get_stacktrace()]),
badrequest_response()
end;
process([Call], #request{method = 'GET', q = Data, ip = IP} = Req) ->
Version = get_api_version(Req),
try
Args = case Data of
[{nokey, <<>>}] -> [];
_ -> Data
end,
log(Call, Args, IP),
case check_permissions(Req, Call) of
{allowed, Cmd, Auth} ->
{Code, Result} = handle(Cmd, Auth, Args, Version, IP),
json_response(Code, jiffy:encode(Result));
%% Warning: check_permission direcly formats 401 reply if not authorized
ErrorResponse ->
ErrorResponse
end
catch _:_Error ->
?DEBUG("Bad Request: ~p ~p", [_Error, erlang:get_stacktrace()]),
badrequest_response()
end;
process([], #request{method = 'OPTIONS', data = <<>>}) ->
{200, ?OPTIONS_HEADER, []};
process(_Path, Request) ->
?DEBUG("Bad Request: no handler ~p", [Request]),
badrequest_response().
% get API version N from last "vN" element in URL path
get_api_version(#request{path = Path}) ->
get_api_version(lists:reverse(Path));
get_api_version([<<"v", String/binary>> | Tail]) ->
case catch jlib:binary_to_integer(String) of
N when is_integer(N) ->
N;
_ ->
get_api_version(Tail)
end;
get_api_version([_Head | Tail]) ->
get_api_version(Tail);
get_api_version([]) ->
?DEFAULT_API_VERSION.
%% ----------------
%% command handlers
%% ----------------
% generic ejabberd command handler
handle(Call, Auth, Args, Version, IP) when is_atom(Call), is_list(Args) ->
case ejabberd_commands:get_command_format(Call, Auth, Version) of
{ArgsSpec, _} when is_list(ArgsSpec) ->
Args2 = [{jlib:binary_to_atom(Key), Value} || {Key, Value} <- Args],
Spec = lists:foldr(
fun ({Key, binary}, Acc) ->
[{Key, <<>>}|Acc];
({Key, string}, Acc) ->
[{Key, <<>>}|Acc];
({Key, integer}, Acc) ->
[{Key, 0}|Acc];
({Key, {list, _}}, Acc) ->
[{Key, []}|Acc];
({Key, atom}, Acc) ->
[{Key, undefined}|Acc]
end, [], ArgsSpec),
try
handle2(Call, Auth, match(Args2, Spec), Version, IP)
catch throw:not_found ->
{404, <<"not_found">>};
throw:{not_found, Why} when is_atom(Why) ->
{404, jlib:atom_to_binary(Why)};
throw:{not_found, Msg} ->
{404, iolist_to_binary(Msg)};
throw:not_allowed ->
{401, <<"not_allowed">>};
throw:{not_allowed, Why} when is_atom(Why) ->
{401, jlib:atom_to_binary(Why)};
throw:{not_allowed, Msg} ->
{401, iolist_to_binary(Msg)};
throw:{error, account_unprivileged} ->
{401, iolist_to_binary(<<"Unauthorized: Account Unpriviledged">>)};
throw:{invalid_parameter, Msg} ->
{400, iolist_to_binary(Msg)};
throw:{error, Why} when is_atom(Why) ->
{400, jlib:atom_to_binary(Why)};
throw:{error, Msg} ->
{400, iolist_to_binary(Msg)};
throw:Error when is_atom(Error) ->
{400, jlib:atom_to_binary(Error)};
throw:Msg when is_list(Msg); is_binary(Msg) ->
{400, iolist_to_binary(Msg)};
_Error ->
?ERROR_MSG("REST API Error: ~p ~p", [_Error, erlang:get_stacktrace()]),
{500, <<"internal_error">>}
end;
{error, Msg} ->
?ERROR_MSG("REST API Error: ~p", [Msg]),
{400, Msg};
_Error ->
?ERROR_MSG("REST API Error: ~p", [_Error]),
{400, <<"Error">>}
end.
handle2(Call, Auth, Args, Version, IP) when is_atom(Call), is_list(Args) ->
{ArgsF, _ResultF} = ejabberd_commands:get_command_format(Call, Auth, Version),
ArgsFormatted = format_args(Args, ArgsF),
ejabberd_command(Auth, Call, ArgsFormatted, Version, IP).
get_elem_delete(A, L) ->
case proplists:get_all_values(A, L) of
[Value] -> {Value, proplists:delete(A, L)};
[_, _ | _] ->
%% Crash reporting the error
exit({duplicated_attribute, A, L});
[] ->
%% Report the error and then force a crash
exit({attribute_not_found, A, L})
end.
format_args(Args, ArgsFormat) ->
{ArgsRemaining, R} = lists:foldl(fun ({ArgName,
ArgFormat},
{Args1, Res}) ->
{ArgValue, Args2} =
get_elem_delete(ArgName,
Args1),
Formatted = format_arg(ArgValue,
ArgFormat),
{Args2, Res ++ [Formatted]}
end,
{Args, []}, ArgsFormat),
case ArgsRemaining of
[] -> R;
L when is_list(L) -> exit({additional_unused_args, L})
end.
format_arg({array, Elements},
{list, {ElementDefName, ElementDefFormat}})
when is_list(Elements) ->
lists:map(fun ({struct, [{ElementName, ElementValue}]}) when
ElementDefName == ElementName ->
format_arg(ElementValue, ElementDefFormat)
end,
Elements);
format_arg({array, [{struct, Elements}]},
{list, {ElementDefName, ElementDefFormat}})
when is_list(Elements) ->
lists:map(fun ({ElementName, ElementValue}) ->
true = ElementDefName == ElementName,
format_arg(ElementValue, ElementDefFormat)
end,
Elements);
format_arg({array, [{struct, Elements}]},
{tuple, ElementsDef})
when is_list(Elements) ->
FormattedList = format_args(Elements, ElementsDef),
list_to_tuple(FormattedList);
format_arg({array, Elements}, {list, ElementsDef})
when is_list(Elements) and is_atom(ElementsDef) ->
[format_arg(Element, ElementsDef)
|| Element <- Elements];
format_arg(Arg, integer) when is_integer(Arg) -> Arg;
format_arg(Arg, binary) when is_list(Arg) -> process_unicode_codepoints(Arg);
format_arg(Arg, binary) when is_binary(Arg) -> Arg;
format_arg(Arg, string) when is_list(Arg) -> process_unicode_codepoints(Arg);
format_arg(Arg, string) when is_binary(Arg) -> Arg;
format_arg(undefined, binary) -> <<>>;
format_arg(undefined, string) -> <<>>;
format_arg(Arg, Format) ->
?ERROR_MSG("don't know how to format Arg ~p for format ~p", [Arg, Format]),
throw({invalid_parameter,
io_lib:format("Arg ~p is not in format ~p",
[Arg, Format])}).
process_unicode_codepoints(Str) ->
iolist_to_binary(lists:map(fun(X) when X > 255 -> unicode:characters_to_binary([X]);
(Y) -> Y
end, Str)).
%% ----------------
%% internal helpers
%% ----------------
match(Args, Spec) ->
[{Key, proplists:get_value(Key, Args, Default)} || {Key, Default} <- Spec].
ejabberd_command(Auth, Cmd, Args, Version, IP) ->
Access = case Auth of
admin -> [];
_ -> undefined
end,
case ejabberd_commands:execute_command(Access, Auth, Cmd, Args, Version, #{ip => IP}) of
{error, Error} ->
throw(Error);
Res ->
format_command_result(Cmd, Auth, Res, Version)
end.
format_command_result(Cmd, Auth, Result, Version) ->
{_, ResultFormat} = ejabberd_commands:get_command_format(Cmd, Auth, Version),
case {ResultFormat, Result} of
{{_, rescode}, V} when V == true; V == ok ->
{200, 0};
{{_, rescode}, _} ->
{200, 1};
{{_, restuple}, {V1, Text1}} when V1 == true; V1 == ok ->
{200, iolist_to_binary(Text1)};
{{_, restuple}, {_, Text2}} ->
{500, iolist_to_binary(Text2)};
{{_, {list, _}}, _V} ->
{_, L} = format_result(Result, ResultFormat),
{200, L};
{{_, {tuple, _}}, _V} ->
{_, T} = format_result(Result, ResultFormat),
{200, T};
_ ->
{200, {[format_result(Result, ResultFormat)]}}
end.
format_result(Atom, {Name, atom}) ->
{jlib:atom_to_binary(Name), jlib:atom_to_binary(Atom)};
format_result(Int, {Name, integer}) ->
{jlib:atom_to_binary(Name), Int};
format_result(String, {Name, string}) ->
{jlib:atom_to_binary(Name), iolist_to_binary(String)};
format_result(Code, {Name, rescode}) ->
{jlib:atom_to_binary(Name), Code == true orelse Code == ok};
format_result({Code, Text}, {Name, restuple}) ->
{jlib:atom_to_binary(Name),
{[{<<"res">>, Code == true orelse Code == ok},
{<<"text">>, iolist_to_binary(Text)}]}};
format_result(Els, {Name, {list, {_, {tuple, [{_, atom}, _]}} = Fmt}}) ->
{jlib:atom_to_binary(Name), {[format_result(El, Fmt) || El <- Els]}};
format_result(Els, {Name, {list, Def}}) ->
{jlib:atom_to_binary(Name), [element(2, format_result(El, Def)) || El <- Els]};
format_result(Tuple, {_Name, {tuple, [{_, atom}, ValFmt]}}) ->
{Name2, Val} = Tuple,
{_, Val2} = format_result(Val, ValFmt),
{jlib:atom_to_binary(Name2), Val2};
format_result(Tuple, {Name, {tuple, Def}}) ->
Els = lists:zip(tuple_to_list(Tuple), Def),
{jlib:atom_to_binary(Name), {[format_result(El, ElDef) || {El, ElDef} <- Els]}};
format_result(404, {_Name, _}) ->
"not_found".
unauthorized_response() ->
unauthorized_response(<<"401 Unauthorized">>).
unauthorized_response(Body) ->
json_response(401, jiffy:encode(Body)).
badrequest_response() ->
badrequest_response(<<"400 Bad Request">>).
badrequest_response(Body) ->
json_response(400, jiffy:encode(Body)).
json_response(Code, Body) when is_integer(Code) ->
{Code, ?HEADER(?CT_JSON), Body}.
log(Call, Args, {Addr, Port}) ->
AddrS = jlib:ip_to_list({Addr, Port}),
?INFO_MSG("API call ~s ~p from ~s:~p", [Call, Args, AddrS, Port]);
log(Call, Args, IP) ->
?INFO_MSG("API call ~s ~p (~p)", [Call, Args, IP]).
mod_opt_type(admin_ip_access) -> fun acl:access_rules_validator/1;
mod_opt_type(_) -> [admin_ip_access].
View Git Blame Copy Permalink