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
|
// Copyright 2007 - 2021, Alan Antonuk and the rabbitmq-c contributors.
// SPDX-License-Identifier: mit
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <rabbitmq-c/amqp.h>
#include <rabbitmq-c/tcp_socket.h>
#include <assert.h>
#include "utils.h"
int main(int argc, char *argv[]) {
char const *hostname;
int port, status;
char const *exchange;
char const *routingkey;
char const *messagebody;
amqp_socket_t *socket = NULL;
amqp_connection_state_t conn;
amqp_bytes_t reply_to_queue;
if (argc < 6) { /* minimum number of mandatory arguments */
fprintf(stderr,
"usage:\namqp_rpc_sendstring_client host port exchange routingkey "
"messagebody\n");
return 1;
}
hostname = argv[1];
port = atoi(argv[2]);
exchange = argv[3];
routingkey = argv[4];
messagebody = argv[5];
/*
establish a channel that is used to connect RabbitMQ server
*/
conn = amqp_new_connection();
socket = amqp_tcp_socket_new(conn);
if (!socket) {
die("creating TCP socket");
}
status = amqp_socket_open(socket, hostname, port);
if (status) {
die("opening TCP socket");
}
die_on_amqp_error(amqp_login(conn, "/", 0, 131072, 0, AMQP_SASL_METHOD_PLAIN,
"guest", "guest"),
"Logging in");
amqp_channel_open(conn, 1);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Opening channel");
/*
create private reply_to queue
*/
{
amqp_queue_declare_ok_t *r = amqp_queue_declare(
conn, 1, amqp_empty_bytes, 0, 0, 0, 1, amqp_empty_table);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Declaring queue");
reply_to_queue = amqp_bytes_malloc_dup(r->queue);
if (reply_to_queue.bytes == NULL) {
fprintf(stderr, "Out of memory while copying queue name");
return 1;
}
}
/*
send the message
*/
{
/*
set properties
*/
amqp_basic_properties_t props;
props._flags = AMQP_BASIC_CONTENT_TYPE_FLAG |
AMQP_BASIC_DELIVERY_MODE_FLAG | AMQP_BASIC_REPLY_TO_FLAG |
AMQP_BASIC_CORRELATION_ID_FLAG;
props.content_type = amqp_cstring_bytes("text/plain");
props.delivery_mode = 2; /* persistent delivery mode */
props.reply_to = amqp_bytes_malloc_dup(reply_to_queue);
if (props.reply_to.bytes == NULL) {
fprintf(stderr, "Out of memory while copying queue name");
return 1;
}
props.correlation_id = amqp_cstring_bytes("1");
/*
publish
*/
die_on_error(amqp_basic_publish(conn, 1, amqp_cstring_bytes(exchange),
amqp_cstring_bytes(routingkey), 0, 0,
&props, amqp_cstring_bytes(messagebody)),
"Publishing");
amqp_bytes_free(props.reply_to);
}
/*
wait an answer
*/
{
amqp_basic_consume(conn, 1, reply_to_queue, amqp_empty_bytes, 0, 1, 0,
amqp_empty_table);
die_on_amqp_error(amqp_get_rpc_reply(conn), "Consuming");
amqp_bytes_free(reply_to_queue);
{
amqp_frame_t frame;
int result;
amqp_basic_deliver_t *d;
amqp_basic_properties_t *p;
size_t body_target;
size_t body_received;
for (;;) {
amqp_maybe_release_buffers(conn);
result = amqp_simple_wait_frame(conn, &frame);
printf("Result: %d\n", result);
if (result < 0) {
break;
}
printf("Frame type: %u channel: %u\n", frame.frame_type, frame.channel);
if (frame.frame_type != AMQP_FRAME_METHOD) {
continue;
}
printf("Method: %s\n", amqp_method_name(frame.payload.method.id));
if (frame.payload.method.id != AMQP_BASIC_DELIVER_METHOD) {
continue;
}
d = (amqp_basic_deliver_t *)frame.payload.method.decoded;
printf("Delivery: %u exchange: %.*s routingkey: %.*s\n",
(unsigned)d->delivery_tag, (int)d->exchange.len,
(char *)d->exchange.bytes, (int)d->routing_key.len,
(char *)d->routing_key.bytes);
result = amqp_simple_wait_frame(conn, &frame);
if (result < 0) {
break;
}
if (frame.frame_type != AMQP_FRAME_HEADER) {
fprintf(stderr, "Expected header!");
abort();
}
p = (amqp_basic_properties_t *)frame.payload.properties.decoded;
if (p->_flags & AMQP_BASIC_CONTENT_TYPE_FLAG) {
printf("Content-type: %.*s\n", (int)p->content_type.len,
(char *)p->content_type.bytes);
}
printf("----\n");
body_target = (size_t)frame.payload.properties.body_size;
body_received = 0;
while (body_received < body_target) {
result = amqp_simple_wait_frame(conn, &frame);
if (result < 0) {
break;
}
if (frame.frame_type != AMQP_FRAME_BODY) {
fprintf(stderr, "Expected body!");
abort();
}
body_received += frame.payload.body_fragment.len;
assert(body_received <= body_target);
amqp_dump(frame.payload.body_fragment.bytes,
frame.payload.body_fragment.len);
}
if (body_received != body_target) {
/* Can only happen when amqp_simple_wait_frame returns <= 0 */
/* We break here to close the connection */
break;
}
/* everything was fine, we can quit now because we received the reply */
break;
}
}
}
/*
closing
*/
die_on_amqp_error(amqp_channel_close(conn, 1, AMQP_REPLY_SUCCESS),
"Closing channel");
die_on_amqp_error(amqp_connection_close(conn, AMQP_REPLY_SUCCESS),
"Closing connection");
die_on_error(amqp_destroy_connection(conn), "Ending connection");
return 0;
}
|
