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Support application metadata through ZMQ_METADATA

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Lets the application set per-connection metadata.
Metadata is specified as "X-key:value" and set using zmq_setsockopt, eg:
zmq_setsockopt (s, ZMQ_METADATA, "X-key:value", 11);

The peer can then obtain the metadata from a received message:
char *data = zmq_msg_gets(msg, "X-key");
This commit is contained in:
Pontus Sköldström
2018-03-12 01:41:33 +01:00
parent c9437ab755
commit dd5eec35be
9 changed files with 226 additions and 5 deletions
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167
tests/test_app_meta.cpp Normal file
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/*
Copyright (c) 2007-2018 Contributors as noted in the AUTHORS file
This file is part of libzmq, the ZeroMQ core engine in C++.
libzmq is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
As a special exception, the Contributors give you permission to link
this library with independent modules to produce an executable,
regardless of the license terms of these independent modules, and to
copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the
terms and conditions of the license of that module. An independent
module is a module which is not derived from or based on this library.
If you modify this library, you must extend this exception to your
version of the library.
libzmq is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "testutil.hpp"
#include <unity.h>
void setUp ()
{
}
void tearDown ()
{
}
void test_app_meta_reqrep ()
{
void *ctx;
zmq_msg_t msg;
void *rep_sock, *req_sock;
const char *req_hello = "X-hello:hello";
const char *req_connection = "X-connection:primary";
const char *req_z85 = "X-bin:009c6";
const char *rep_hello = "X-hello:world";
const char *rep_connection = "X-connection:backup";
const char *bad_strings[] = {
":",
"key:",
":value",
"keyvalue",
"",
"X-"
"KeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKe"
"yTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyT"
"ooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyTooLongKeyToo"
"LongKeyTooLongKeyTooLongKeyTooLongKeyTooLong:value"};
ctx = zmq_ctx_new ();
rep_sock = zmq_socket (ctx, ZMQ_REP);
TEST_ASSERT_NOT_NULL (rep_sock);
req_sock = zmq_socket (ctx, ZMQ_REQ);
TEST_ASSERT_NOT_NULL (req_sock);
int rc =
zmq_setsockopt (rep_sock, ZMQ_METADATA, rep_hello, strlen (rep_hello));
TEST_ASSERT_EQUAL_INT (0, rc);
int l = 0;
rc = zmq_setsockopt (rep_sock, ZMQ_LINGER, &l, sizeof (l));
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_setsockopt (rep_sock, ZMQ_METADATA, rep_connection,
strlen (rep_connection));
TEST_ASSERT_EQUAL_INT (0, rc);
for (int i = 0; i < 6; i++) {
rc = zmq_setsockopt (rep_sock, ZMQ_METADATA, bad_strings[i],
strlen (bad_strings[i]));
TEST_ASSERT_EQUAL_INT (-1, rc);
}
rc = zmq_bind (rep_sock, "tcp://127.0.0.1:5555");
TEST_ASSERT_EQUAL_INT (0, rc);
l = 0;
rc = zmq_setsockopt (req_sock, ZMQ_LINGER, &l, sizeof (l));
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_setsockopt (req_sock, ZMQ_METADATA, req_hello, strlen (req_hello));
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_setsockopt (req_sock, ZMQ_METADATA, req_connection,
strlen (req_connection));
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_setsockopt (req_sock, ZMQ_METADATA, req_z85, strlen (req_z85));
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_connect (req_sock, "tcp://127.0.0.1:5555");
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_msg_init_size (&msg, 1);
TEST_ASSERT_EQUAL_INT (0, rc);
char *data = (char *) zmq_msg_data (&msg);
data[0] = 1;
rc = zmq_msg_send (&msg, req_sock, 0);
TEST_ASSERT_EQUAL_INT (1, rc);
rc = zmq_msg_init (&msg);
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_msg_recv (&msg, rep_sock, 0);
TEST_ASSERT_EQUAL_INT (1, rc);
TEST_ASSERT_EQUAL_STRING ("hello", zmq_msg_gets (&msg, "X-hello"));
TEST_ASSERT_EQUAL_STRING ("primary", zmq_msg_gets (&msg, "X-connection"));
char *bindata = (char *) zmq_msg_gets (&msg, "X-bin");
TEST_ASSERT_NOT_NULL (bindata);
uint8_t rawdata[4];
void *ret = zmq_z85_decode (rawdata, bindata);
TEST_ASSERT_NOT_NULL (ret);
TEST_ASSERT_EQUAL_UINT8 (0, rawdata[0]);
TEST_ASSERT_EQUAL_UINT8 (1, rawdata[1]);
TEST_ASSERT_EQUAL_UINT8 (2, rawdata[2]);
TEST_ASSERT_EQUAL_UINT8 (3, rawdata[3]);
TEST_ASSERT_NULL (zmq_msg_gets (&msg, "X-foobar"));
TEST_ASSERT_NULL (zmq_msg_gets (&msg, "foobar"));
rc = zmq_msg_send (&msg, rep_sock, 0);
TEST_ASSERT_EQUAL_INT (1, rc);
rc = zmq_msg_recv (&msg, req_sock, 0);
TEST_ASSERT_EQUAL_INT (1, rc);
TEST_ASSERT_EQUAL_STRING ("world", zmq_msg_gets (&msg, "X-hello"));
TEST_ASSERT_EQUAL_STRING ("backup", zmq_msg_gets (&msg, "X-connection"));
rc = zmq_msg_close (&msg);
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_close (req_sock);
TEST_ASSERT_EQUAL_INT (0, rc);
rc = zmq_close (rep_sock);
TEST_ASSERT_EQUAL_INT (0, rc);
zmq_ctx_term (ctx);
}
int main ()
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_app_meta_reqrep);
return UNITY_END ();
}