97 lines
3.4 KiB
Erlang
97 lines
3.4 KiB
Erlang
%%--------------------------------------------------------------------
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%% Copyright (c) 2020-2022 EMQ Technologies Co., Ltd. All Rights Reserved.
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%%
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%% Licensed under the Apache License, Version 2.0 (the "License");
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%% you may not use this file except in compliance with the License.
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%% You may obtain a copy of the License at
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%%
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%% http://www.apache.org/licenses/LICENSE-2.0
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%%
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%% Unless required by applicable law or agreed to in writing, software
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%% distributed under the License is distributed on an "AS IS" BASIS,
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%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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%% See the License for the specific language governing permissions and
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%% limitations under the License.
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%%--------------------------------------------------------------------
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-module(emqx_authz_mongodb).
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-include("emqx_authz.hrl").
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-include_lib("emqx/include/emqx.hrl").
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-include_lib("emqx/include/logger.hrl").
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-include_lib("emqx/include/emqx_placeholder.hrl").
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-behaviour(emqx_authz).
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%% AuthZ Callbacks
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-export([ description/0
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, init/1
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, destroy/1
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, dry_run/1
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, authorize/4
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]).
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-ifdef(TEST).
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-compile(export_all).
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-compile(nowarn_export_all).
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-endif.
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-define(PLACEHOLDERS, [?PH_USERNAME,
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?PH_CLIENTID,
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?PH_PEERHOST]).
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description() ->
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"AuthZ with MongoDB".
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init(#{selector := Selector} = Source) ->
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case emqx_authz_utils:create_resource(emqx_connector_mongo, Source) of
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{error, Reason} -> error({load_config_error, Reason});
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{ok, Id} -> Source#{annotations => #{id => Id},
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selector_template => emqx_authz_utils:parse_deep(
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Selector,
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?PLACEHOLDERS)}
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end.
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dry_run(Source) ->
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emqx_resource:create_dry_run_local(emqx_connector_mongo, Source).
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destroy(#{annotations := #{id := Id}}) ->
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ok = emqx_resource:remove_local(Id).
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authorize(Client, PubSub, Topic,
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#{collection := Collection,
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selector_template := SelectorTemplate,
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annotations := #{id := ResourceID}
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}) ->
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RenderedSelector = emqx_authz_utils:render_deep(SelectorTemplate, Client),
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Result = try
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emqx_resource:query(ResourceID, {find, Collection, RenderedSelector, #{}})
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catch
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error:Error -> {error, Error}
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end,
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case Result of
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{error, Reason} ->
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?SLOG(error, #{msg => "query_mongo_error",
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reason => Reason,
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collection => Collection,
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selector => RenderedSelector,
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resource_id => ResourceID}),
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nomatch;
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[] -> nomatch;
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Rows ->
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Rules = [ emqx_authz_rule:compile({Permission, all, Action, Topics})
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|| #{<<"topics">> := Topics,
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<<"permission">> := Permission,
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<<"action">> := Action} <- Rows],
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do_authorize(Client, PubSub, Topic, Rules)
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end.
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do_authorize(_Client, _PubSub, _Topic, []) ->
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nomatch;
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do_authorize(Client, PubSub, Topic, [Rule | Tail]) ->
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case emqx_authz_rule:match(Client, PubSub, Topic, Rule) of
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{matched, Permission} -> {matched, Permission};
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nomatch -> do_authorize(Client, PubSub, Topic, Tail)
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end.
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