1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
|
%% 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) 2007-2012 VMware, Inc. All rights reserved.
%%
-module(rabbit_basic).
-include("rabbit.hrl").
-include("rabbit_framing.hrl").
-export([publish/4, publish/6, publish/1,
message/3, message/4, properties/1, append_table_header/3,
extract_headers/1, replace_headers/2, delivery/4, header_routes/1]).
-export([build_content/2, from_content/1]).
%%----------------------------------------------------------------------------
-ifdef(use_specs).
-type(properties_input() ::
(rabbit_framing:amqp_property_record() | [{atom(), any()}])).
-type(publish_result() ::
({ok, rabbit_amqqueue:routing_result(), [pid()]}
| rabbit_types:error('not_found'))).
-type(headers() :: rabbit_framing:amqp_table() | 'undefined').
-type(exchange_input() :: (rabbit_types:exchange() | rabbit_exchange:name())).
-type(body_input() :: (binary() | [binary()])).
-spec(publish/4 ::
(exchange_input(), rabbit_router:routing_key(), properties_input(),
body_input()) -> publish_result()).
-spec(publish/6 ::
(exchange_input(), rabbit_router:routing_key(), boolean(), boolean(),
properties_input(), body_input()) -> publish_result()).
-spec(publish/1 ::
(rabbit_types:delivery()) -> publish_result()).
-spec(delivery/4 ::
(boolean(), boolean(), rabbit_types:message(), undefined | integer()) ->
rabbit_types:delivery()).
-spec(message/4 ::
(rabbit_exchange:name(), rabbit_router:routing_key(),
properties_input(), binary()) -> rabbit_types:message()).
-spec(message/3 ::
(rabbit_exchange:name(), rabbit_router:routing_key(),
rabbit_types:decoded_content()) ->
rabbit_types:ok_or_error2(rabbit_types:message(), any())).
-spec(properties/1 ::
(properties_input()) -> rabbit_framing:amqp_property_record()).
-spec(append_table_header/3 ::
(binary(), rabbit_framing:amqp_table(), headers()) -> headers()).
-spec(extract_headers/1 :: (rabbit_types:content()) -> headers()).
-spec(replace_headers/2 :: (headers(), rabbit_types:content())
-> rabbit_types:content()).
-spec(header_routes/1 ::
(undefined | rabbit_framing:amqp_table()) ->
[string()] | rabbit_types:error(any())).
-spec(build_content/2 :: (rabbit_framing:amqp_property_record(),
binary() | [binary()]) -> rabbit_types:content()).
-spec(from_content/1 :: (rabbit_types:content()) ->
{rabbit_framing:amqp_property_record(), binary()}).
-endif.
%%----------------------------------------------------------------------------
%% Convenience function, for avoiding round-trips in calls across the
%% erlang distributed network.
publish(Exchange, RoutingKeyBin, Properties, Body) ->
publish(Exchange, RoutingKeyBin, false, false, Properties, Body).
%% Convenience function, for avoiding round-trips in calls across the
%% erlang distributed network.
publish(X = #exchange{name = XName}, RKey, Mandatory, Immediate, Props, Body) ->
publish(X, delivery(Mandatory, Immediate,
message(XName, RKey, properties(Props), Body),
undefined));
publish(XName, RKey, Mandatory, Immediate, Props, Body) ->
publish(delivery(Mandatory, Immediate,
message(XName, RKey, properties(Props), Body),
undefined)).
publish(Delivery = #delivery{
message = #basic_message{exchange_name = XName}}) ->
case rabbit_exchange:lookup(XName) of
{ok, X} -> publish(X, Delivery);
Err -> Err
end.
publish(X, Delivery) ->
Qs = rabbit_amqqueue:lookup(rabbit_exchange:route(X, Delivery)),
{RoutingRes, DeliveredQPids} = rabbit_amqqueue:deliver(Qs, Delivery),
{ok, RoutingRes, DeliveredQPids}.
delivery(Mandatory, Immediate, Message, MsgSeqNo) ->
#delivery{mandatory = Mandatory, immediate = Immediate, sender = self(),
message = Message, msg_seq_no = MsgSeqNo}.
build_content(Properties, BodyBin) when is_binary(BodyBin) ->
build_content(Properties, [BodyBin]);
build_content(Properties, PFR) ->
%% basic.publish hasn't changed so we can just hard-code amqp_0_9_1
{ClassId, _MethodId} =
rabbit_framing_amqp_0_9_1:method_id('basic.publish'),
#content{class_id = ClassId,
properties = Properties,
properties_bin = none,
protocol = none,
payload_fragments_rev = PFR}.
from_content(Content) ->
#content{class_id = ClassId,
properties = Props,
payload_fragments_rev = FragmentsRev} =
rabbit_binary_parser:ensure_content_decoded(Content),
%% basic.publish hasn't changed so we can just hard-code amqp_0_9_1
{ClassId, _MethodId} =
rabbit_framing_amqp_0_9_1:method_id('basic.publish'),
{Props, list_to_binary(lists:reverse(FragmentsRev))}.
%% This breaks the spec rule forbidding message modification
strip_header(#content{properties = #'P_basic'{headers = undefined}}
= DecodedContent, _Key) ->
DecodedContent;
strip_header(#content{properties = Props = #'P_basic'{headers = Headers}}
= DecodedContent, Key) ->
case lists:keysearch(Key, 1, Headers) of
false -> DecodedContent;
{value, Found} -> Headers0 = lists:delete(Found, Headers),
rabbit_binary_generator:clear_encoded_content(
DecodedContent#content{
properties = Props#'P_basic'{
headers = Headers0}})
end.
message(XName, RoutingKey, #content{properties = Props} = DecodedContent) ->
try
{ok, #basic_message{
exchange_name = XName,
content = strip_header(DecodedContent, ?DELETED_HEADER),
id = rabbit_guid:gen(),
is_persistent = is_message_persistent(DecodedContent),
routing_keys = [RoutingKey |
header_routes(Props#'P_basic'.headers)]}}
catch
{error, _Reason} = Error -> Error
end.
message(XName, RoutingKey, RawProperties, Body) ->
Properties = properties(RawProperties),
Content = build_content(Properties, Body),
{ok, Msg} = message(XName, RoutingKey, Content),
Msg.
properties(P = #'P_basic'{}) ->
P;
properties(P) when is_list(P) ->
%% Yes, this is O(length(P) * record_info(size, 'P_basic') / 2),
%% i.e. slow. Use the definition of 'P_basic' directly if
%% possible!
lists:foldl(fun ({Key, Value}, Acc) ->
case indexof(record_info(fields, 'P_basic'), Key) of
0 -> throw({unknown_basic_property, Key});
N -> setelement(N + 1, Acc, Value)
end
end, #'P_basic'{}, P).
append_table_header(Name, Info, undefined) ->
append_table_header(Name, Info, []);
append_table_header(Name, Info, Headers) ->
Prior = case rabbit_misc:table_lookup(Headers, Name) of
undefined -> [];
{array, Existing} -> Existing
end,
rabbit_misc:set_table_value(Headers, Name, array, [{table, Info} | Prior]).
extract_headers(Content) ->
#content{properties = #'P_basic'{headers = Headers}} =
rabbit_binary_parser:ensure_content_decoded(Content),
Headers.
replace_headers(Headers, Content = #content{properties = Props}) ->
rabbit_binary_generator:clear_encoded_content(
Content#content{properties = Props#'P_basic'{headers = Headers}}).
indexof(L, Element) -> indexof(L, Element, 1).
indexof([], _Element, _N) -> 0;
indexof([Element | _Rest], Element, N) -> N;
indexof([_ | Rest], Element, N) -> indexof(Rest, Element, N + 1).
is_message_persistent(#content{properties = #'P_basic'{
delivery_mode = Mode}}) ->
case Mode of
1 -> false;
2 -> true;
undefined -> false;
Other -> throw({error, {delivery_mode_unknown, Other}})
end.
%% Extract CC routes from headers
header_routes(undefined) ->
[];
header_routes(HeadersTable) ->
lists:append(
[case rabbit_misc:table_lookup(HeadersTable, HeaderKey) of
{array, Routes} -> [Route || {longstr, Route} <- Routes];
undefined -> [];
{Type, _Val} -> throw({error, {unacceptable_type_in_header,
Type,
binary_to_list(HeaderKey)}})
end || HeaderKey <- ?ROUTING_HEADERS]).
|
