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| Original file line number | Diff line number | Diff line change |
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| %% This Source Code Form is subject to the terms of the Mozilla Public | ||
| %% License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| %% file, You can obtain one at https://mozilla.org/MPL/2.0/. | ||
| %% | ||
| %% Copyright (c) 2007-2024 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. All rights reserved. | ||
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| %% AMQP Filter Expressions Version 1.0 Working Draft 09 | ||
| %% https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=66227 | ||
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| -define(DESCRIPTOR_NAME_PROPERTIES_FILTER, <<"amqp:properties-filter">>). | ||
| -define(DESCRIPTOR_CODE_PROPERTIES_FILTER, 16#173). | ||
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| -define(DESCRIPTOR_NAME_APPLICATION_PROPERTIES_FILTER, <<"amqp:application-properties-filter">>). | ||
| -define(DESCRIPTOR_CODE_APPLICATION_PROPERTIES_FILTER, 16#174). |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,149 @@ | ||
| %% This Source Code Form is subject to the terms of the Mozilla Public | ||
| %% License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| %% file, You can obtain one at https://mozilla.org/MPL/2.0/. | ||
| %% | ||
| %% Copyright (c) 2007-2023 Broadcom. All Rights Reserved. The term “Broadcom” refers to Broadcom Inc. and/or its subsidiaries. All rights reserved. | ||
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| %% AMQP Filter Expressions Version 1.0 Working Draft 09 | ||
| %% https://groups.oasis-open.org/higherlogic/ws/public/document?document_id=66227 | ||
| -module(rabbit_amqp_filtex). | ||
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| -include_lib("amqp10_common/include/amqp10_filtex.hrl"). | ||
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| -export([validate/1, | ||
| filter/2]). | ||
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| -type filter_expression() :: {properties, [{atom(), term()}]} | | ||
| {application_properties, [{binary(), term()}]}. | ||
| -type filter_expressions() :: [filter_expression()]. | ||
| -export_type([filter_expressions/0]). | ||
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| -spec validate(tuple()) -> | ||
| {ok, filter_expression()} | error. | ||
| validate({described, Descriptor, {map, KVList}}) -> | ||
| validate0(Descriptor, KVList); | ||
| validate(_) -> | ||
| error. | ||
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| -spec filter(filter_expressions(), mc:state()) -> | ||
| boolean(). | ||
| filter(Filters, Mc) -> | ||
| %% "A message will pass through a filter-set if and only if | ||
| %% it passes through each of the named filters." [3.5.8] | ||
| lists:all(fun(Filter) -> | ||
| filter0(Filter, Mc) | ||
| end, Filters). | ||
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| %%%%%%%%%%%%%%%% | ||
| %%% Internal %%% | ||
| %%%%%%%%%%%%%%%% | ||
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| filter0({properties, KVList}, Mc) -> | ||
| %% "The filter evaluates to true if all properties enclosed in the filter expression | ||
| %% match the respective properties in the message." | ||
| %% [filtex-v1.0-wd09 4.2.4] | ||
| lists:all(fun({FieldName, RefVal}) -> | ||
| TaggedVal = mc:property(FieldName, Mc), | ||
| Val = unwrap(TaggedVal), | ||
| match_simple_type(RefVal, Val) | ||
| end, KVList); | ||
| filter0({application_properties, KVList}, Mc) -> | ||
| AppProps = mc:routing_headers(Mc, []), | ||
| %% "The filter evaluates to true if all properties enclosed in the filter expression | ||
| %% match the respective entries in the application-properties section in the message." | ||
| %% [filtex-v1.0-wd09 4.2.5] | ||
| lists:all(fun({Key, RefVal}) -> | ||
| case AppProps of | ||
| #{Key := Val} -> | ||
| match_simple_type(RefVal, Val); | ||
| _ -> | ||
| false | ||
| end | ||
| end, KVList). | ||
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| %% [filtex-v1.0-wd09 4.1.1] | ||
| %% "A reference field value in a property filter expression matches | ||
| %% its corresponding message metadata field value if: | ||
| %% [...] | ||
| match_simple_type(null, _Val) -> | ||
| %% * The reference field value is NULL | ||
| true; | ||
| match_simple_type(RefVal, Val) -> | ||
| %% * the reference field value is of a floating-point or integer number type | ||
| %% and the message metadata field is of a different floating-point or integer number type, | ||
| %% the reference value and the metadata field value are within the value range of both types, | ||
| %% and the values are equal when treated as a floating-point" | ||
| RefVal == Val. | ||
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| validate0(Descriptor, KVList) when | ||
| (Descriptor =:= {symbol, ?DESCRIPTOR_NAME_PROPERTIES_FILTER} orelse | ||
| Descriptor =:= {ulong, ?DESCRIPTOR_CODE_PROPERTIES_FILTER}) andalso | ||
| KVList =/= [] -> | ||
| validate_props(KVList, []); | ||
| validate0(Descriptor, KVList0) when | ||
| (Descriptor =:= {symbol, ?DESCRIPTOR_NAME_APPLICATION_PROPERTIES_FILTER} orelse | ||
| Descriptor =:= {ulong, ?DESCRIPTOR_CODE_APPLICATION_PROPERTIES_FILTER}) andalso | ||
| KVList0 =/= [] -> | ||
| KVList = lists:map(fun({{utf8, Key}, TaggedVal}) -> | ||
| {Key, unwrap(TaggedVal)} | ||
| end, KVList0), | ||
| {ok, {application_properties, KVList}}; | ||
| validate0(_, _) -> | ||
| error. | ||
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| validate_props([], Acc) -> | ||
| {ok, {properties, lists:reverse(Acc)}}; | ||
| validate_props([{{symbol, <<"message-id">>}, {Type, Val}} | Rest], Acc) -> | ||
| case validate_message_id_type(Type) of | ||
| ok -> | ||
| validate_props(Rest, [{message_id, Val} | Acc]); | ||
| error -> | ||
| error | ||
| end; | ||
| validate_props([{{symbol, <<"user-id">>}, {binary, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{user_id, Val} | Acc]); | ||
| validate_props([{{symbol, <<"to">>}, {utf8, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{to, Val} | Acc]); | ||
| validate_props([{{symbol, <<"subject">>}, {utf8, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{subject, Val} | Acc]); | ||
| validate_props([{{symbol, <<"reply-to">>}, {utf8, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{reply_to, Val} | Acc]); | ||
| validate_props([{{symbol, <<"correlation-id">>}, {Type, Val}} | Rest], Acc) -> | ||
| case validate_message_id_type(Type) of | ||
| ok -> | ||
| validate_props(Rest, [{correlation_id, Val} | Acc]); | ||
| error -> | ||
| error | ||
| end; | ||
| validate_props([{{symbol, <<"content-type">>}, {symbol, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{content_type, Val} | Acc]); | ||
| validate_props([{{symbol, <<"content-encoding">>}, {symbol, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{content_encoding, Val} | Acc]); | ||
| validate_props([{{symbol, <<"absolute-expiry-time">>}, {timestamp, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{absolute_expiry_time, Val} | Acc]); | ||
| validate_props([{{symbol, <<"creation-time">>}, {timestamp, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{creation_time, Val} | Acc]); | ||
| validate_props([{{symbol, <<"group-id">>}, {utf8, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{group_id, Val} | Acc]); | ||
| validate_props([{{symbol, <<"group-sequence">>}, {uint, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{group_sequence, Val} | Acc]); | ||
| validate_props([{{symbol, <<"reply-to-group-id">>}, {utf8, Val}} | Rest], Acc) -> | ||
| validate_props(Rest, [{reply_to_group_id, Val} | Acc]); | ||
| validate_props(_, _) -> | ||
| error. | ||
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| validate_message_id_type(ulong) -> | ||
| ok; | ||
| validate_message_id_type(uuid) -> | ||
| ok; | ||
| validate_message_id_type(binary) -> | ||
| ok; | ||
| validate_message_id_type(utf8) -> | ||
| ok; | ||
| validate_message_id_type(_) -> | ||
| error. | ||
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| unwrap({_Tag, V}) -> | ||
| V; | ||
| unwrap(V) -> | ||
| V. |
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