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| %% The contents of this file are subject to the Mozilla Public License | ||
| %% Version 1.1 (the "License"); you may not use this file except in | ||
| %% compliance with the License. You may obtain a copy of the License | ||
| %% at http://www.mozilla.org/MPL/ | ||
| %% | ||
| %% Software distributed under the License is distributed on an "AS IS" | ||
| %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See | ||
| %% the License for the specific language governing rights and | ||
| %% limitations under the License. | ||
| %% | ||
| %% The Original Code is RabbitMQ. | ||
| %% | ||
| %% The Initial Developer of the Original Code is VMware, Inc. | ||
| %% Copyright (c) 2011-2013 VMware, Inc. All rights reserved. | ||
| %% | ||
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| -define(QUEUE_PREFIX, "/queue"). | ||
| -define(TOPIC_PREFIX, "/topic"). | ||
| -define(EXCHANGE_PREFIX, "/exchange"). | ||
| -define(AMQQUEUE_PREFIX, "/amq/queue"). | ||
| -define(TEMP_QUEUE_PREFIX, "/temp-queue"). | ||
| %% reply queues names can have slashes in the content so no further | ||
| %% parsing happens. | ||
| -define(REPLY_QUEUE_PREFIX, "/reply-queue/"). |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,196 @@ | ||
| %% The contents of this file are subject to the Mozilla Public License | ||
| %% Version 1.1 (the "License"); you may not use this file except in | ||
| %% compliance with the License. You may obtain a copy of the License at | ||
| %% http://www.mozilla.org/MPL/ | ||
| %% | ||
| %% Software distributed under the License is distributed on an "AS IS" | ||
| %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the | ||
| %% License for the specific language governing rights and limitations | ||
| %% under the License. | ||
| %% | ||
| %% The Original Code is RabbitMQ. | ||
| %% | ||
| %% The Initial Developer of the Original Code is VMware, Inc. | ||
| %% Copyright (c) 2013-2013 VMware, Inc. All rights reserved. | ||
| %% | ||
|
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| -module(rabbit_routing_util). | ||
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| -export([init_state/0, dest_prefixes/0, all_dest_prefixes/0]). | ||
| -export([ensure_endpoint/4, ensure_endpoint/5, ensure_binding/3]). | ||
| -export([parse_endpoint/1, parse_endpoint/2]). | ||
| -export([parse_routing/1, dest_temp_queue/1]). | ||
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| -include("amqp_client.hrl"). | ||
| -include("rabbit_routing_prefixes.hrl"). | ||
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| %%---------------------------------------------------------------------------- | ||
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| init_state() -> sets:new(). | ||
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| dest_prefixes() -> [?EXCHANGE_PREFIX, ?TOPIC_PREFIX, ?QUEUE_PREFIX, | ||
| ?AMQQUEUE_PREFIX, ?REPLY_QUEUE_PREFIX]. | ||
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| all_dest_prefixes() -> [?TEMP_QUEUE_PREFIX | dest_prefixes()]. | ||
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| %% -------------------------------------------------------------------------- | ||
|
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| parse_endpoint(Destination) -> | ||
| parse_endpoint(Destination, false). | ||
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| parse_endpoint(undefined, AllowAnonymousQueue) -> | ||
| parse_endpoint("/queue", AllowAnonymousQueue); | ||
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| parse_endpoint(Destination, AllowAnonymousQueue) when is_binary(Destination) -> | ||
| parse_endpoint(unicode:characters_to_list(Destination), | ||
| AllowAnonymousQueue); | ||
| parse_endpoint(Destination, AllowAnonymousQueue) when is_list(Destination) -> | ||
| case re:split(Destination, "/", [{return, list}]) of | ||
| [Name] -> | ||
| {ok, {queue, unescape(Name)}}; | ||
| ["", Type | Rest] | ||
| when Type =:= "exchange" orelse Type =:= "queue" orelse | ||
| Type =:= "topic" orelse Type =:= "temp-queue" -> | ||
| parse_endpoint0(atomise(Type), Rest, AllowAnonymousQueue); | ||
| ["", "amq", "queue" | Rest] -> | ||
| parse_endpoint0(amqqueue, Rest, AllowAnonymousQueue); | ||
| ["", "reply-queue" = Prefix | [_|_]] -> | ||
| parse_endpoint0(reply_queue, | ||
| [lists:nthtail(2 + length(Prefix), Destination)], | ||
| AllowAnonymousQueue); | ||
| _ -> | ||
| {error, {unknown_destination, Destination}} | ||
| end. | ||
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| parse_endpoint0(exchange, ["" | _] = Rest, _) -> | ||
| {error, {invalid_destination, exchange, to_url(Rest)}}; | ||
| parse_endpoint0(exchange, [Name], _) -> | ||
| {ok, {exchange, {unescape(Name), undefined}}}; | ||
| parse_endpoint0(exchange, [Name, Pattern], _) -> | ||
| {ok, {exchange, {unescape(Name), unescape(Pattern)}}}; | ||
| parse_endpoint0(queue, [], false) -> | ||
| {error, {invalid_destination, queue, []}}; | ||
| parse_endpoint0(queue, [], true) -> | ||
| {ok, {queue, undefined}}; | ||
| parse_endpoint0(Type, [[_|_]] = [Name], _) -> | ||
| {ok, {Type, unescape(Name)}}; | ||
| parse_endpoint0(Type, Rest, _) -> | ||
| {error, {invalid_destination, Type, to_url(Rest)}}. | ||
|
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| %% -------------------------------------------------------------------------- | ||
|
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| ensure_endpoint(Dir, Channel, EndPoint, State) -> | ||
| ensure_endpoint(Dir, Channel, EndPoint, [], State). | ||
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| ensure_endpoint(source, Channel, {exchange, {Name, _}}, Params, State) -> | ||
| check_exchange(Name, Channel, | ||
| proplists:get_value(check_exchange, Params, false)), | ||
| Method = queue_declare_method(#'queue.declare'{}, exchange, Params), | ||
| #'queue.declare_ok'{queue = Queue} = amqp_channel:call(Channel, Method), | ||
| {ok, Queue, State}; | ||
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| ensure_endpoint(source, Channel, {topic, _}, Params, State) -> | ||
| Method = queue_declare_method(#'queue.declare'{}, topic, Params), | ||
| #'queue.declare_ok'{queue = Queue} = amqp_channel:call(Channel, Method), | ||
| {ok, Queue, State}; | ||
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| ensure_endpoint(_Dir, _Channel, {queue, undefined}, _Params, State) -> | ||
| {ok, undefined, State}; | ||
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| ensure_endpoint(_, Channel, {queue, Name}, Params, State) -> | ||
| Params1 = rabbit_misc:pset(durable, true, Params), | ||
| Queue = list_to_binary(Name), | ||
| State1 = case sets:is_element(Queue, State) of | ||
| true -> State; | ||
| _ -> Method = queue_declare_method( | ||
| #'queue.declare'{queue = Queue, | ||
| nowait = true}, | ||
| queue, Params1), | ||
| amqp_channel:cast(Channel, Method), | ||
| sets:add_element(Queue, State) | ||
| end, | ||
| {ok, Queue, State1}; | ||
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| ensure_endpoint(dest, Channel, {exchange, {Name, _}}, Params, State) -> | ||
| check_exchange(Name, Channel, | ||
| proplists:get_value(check_exchange, Params, false)), | ||
| {ok, undefined, State}; | ||
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| ensure_endpoint(dest, _Ch, {topic, _}, _Params, State) -> | ||
| {ok, undefined, State}; | ||
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| ensure_endpoint(_, _Ch, {Type, Name}, _Params, State) | ||
| when Type =:= reply_queue orelse Type =:= amqqueue -> | ||
| {ok, list_to_binary(Name), State}; | ||
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| ensure_endpoint(_Direction, _Ch, _Endpoint, _Params, _State) -> | ||
| {error, invalid_endpoint}. | ||
|
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| %% -------------------------------------------------------------------------- | ||
|
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| ensure_binding(QueueBin, {"", Queue}, _Channel) -> | ||
| %% i.e., we should only be asked to bind to the default exchange a | ||
| %% queue with its own name | ||
| QueueBin = list_to_binary(Queue), | ||
| ok; | ||
| ensure_binding(Queue, {Exchange, RoutingKey}, Channel) -> | ||
| #'queue.bind_ok'{} = | ||
| amqp_channel:call(Channel, | ||
| #'queue.bind'{ | ||
| queue = Queue, | ||
| exchange = list_to_binary(Exchange), | ||
| routing_key = list_to_binary(RoutingKey)}), | ||
| ok. | ||
|
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| %% -------------------------------------------------------------------------- | ||
|
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| parse_routing({exchange, {Name, undefined}}) -> | ||
| {Name, ""}; | ||
| parse_routing({exchange, {Name, Pattern}}) -> | ||
| {Name, Pattern}; | ||
| parse_routing({topic, Name}) -> | ||
| {"amq.topic", Name}; | ||
| parse_routing({Type, Name}) | ||
| when Type =:= queue orelse Type =:= reply_queue orelse Type =:= amqqueue -> | ||
| {"", Name}. | ||
|
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| dest_temp_queue({temp_queue, Name}) -> Name; | ||
| dest_temp_queue(_) -> none. | ||
|
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| %% -------------------------------------------------------------------------- | ||
|
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| check_exchange(_, _, false) -> | ||
| ok; | ||
| check_exchange(ExchangeName, Channel, true) -> | ||
| XDecl = #'exchange.declare'{ exchange = list_to_binary(ExchangeName), | ||
| passive = true }, | ||
| #'exchange.declare_ok'{} = amqp_channel:call(Channel, XDecl), | ||
| ok. | ||
|
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| queue_declare_method(#'queue.declare'{} = Method, Type, Params) -> | ||
| Method1 = case proplists:get_value(durable, Params, false) of | ||
| true -> Method#'queue.declare'{durable = true}; | ||
| false -> Method#'queue.declare'{auto_delete = true, | ||
| exclusive = true} | ||
| end, | ||
| case {Type, proplists:get_value(subscription_queue_name_gen, Params)} of | ||
| {topic, SQNG} when is_function(SQNG) -> | ||
| Method1#'queue.declare'{queue = SQNG()}; | ||
| _ -> | ||
| Method1 | ||
| end. | ||
|
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| %% -------------------------------------------------------------------------- | ||
|
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| to_url([]) -> []; | ||
| to_url(Lol) -> "/" ++ string:join(Lol, "/"). | ||
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| atomise(Name) when is_list(Name) -> | ||
| list_to_atom(re:replace(Name, "-", "_", [{return,list}, global])). | ||
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| unescape(Str) -> unescape(Str, []). | ||
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| unescape("%2F" ++ Str, Acc) -> unescape(Str, [$/ | Acc]); | ||
| unescape([C | Str], Acc) -> unescape(Str, [C | Acc]); | ||
| unescape([], Acc) -> lists:reverse(Acc). | ||
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