C++ (Cpp) MQTTClient_receiveの例

コード例 #1

ファイル: test3.c プロジェクト: Adamwuming/paho.mqtt.c

/*********************************************************************

Test: single-threaded client

*********************************************************************/
void singleThread_sendAndReceive(MQTTClient* c, int qos, char* test_topic)
{
	MQTTClient_deliveryToken dt;
	MQTTClient_message pubmsg = MQTTClient_message_initializer;
	MQTTClient_message* m = NULL;
	char* topicName = NULL;
	int topicLen;
	int i = 0;
	int iterations = 50;
	int rc;

	MyLog(LOGA_DEBUG, "%d messages at QoS %d", iterations, qos);
	pubmsg.payload = "a much longer message that we can shorten to the extent that we need to payload up to 11";
	pubmsg.payloadlen = 11;
	pubmsg.qos = qos;
	pubmsg.retained = 0;

	for (i = 0; i< iterations; ++i)
	{
		if (i % 10 == 0)
			rc = MQTTClient_publish(c, test_topic, pubmsg.payloadlen, pubmsg.payload, pubmsg.qos, pubmsg.retained, NULL);
		else
			rc = MQTTClient_publishMessage(c, test_topic, &pubmsg, &dt);
		assert("Good rc from publish", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);

		if (qos > 0)
		{
			rc = MQTTClient_waitForCompletion(c, dt, 20000L);
			assert("Good rc from waitforCompletion", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
		}

		rc = MQTTClient_receive(c, &topicName, &topicLen, &m, 10000);
		assert("Good rc from receive", rc == MQTTCLIENT_SUCCESS, "rc was %d", rc);
		if (topicName)
		{
			MyLog(LOGA_DEBUG, "Message received on topic %s is %.*s", topicName, m->payloadlen, (char*)(m->payload));
			if (pubmsg.payloadlen != m->payloadlen ||
					memcmp(m->payload, pubmsg.payload, m->payloadlen) != 0)
			{
				failures++;
				MyLog(LOGA_INFO, "Error: wrong data - received lengths %d %d", pubmsg.payloadlen, m->payloadlen);
				break;
			}
			MQTTClient_free(topicName);
			MQTTClient_freeMessage(&m);
		}
		else
			printf("No message received within timeout period\n");
	}

	/* receive any outstanding messages */
	MQTTClient_receive(c, &topicName, &topicLen, &m, 1000);
	while (topicName)
	{
		printf("Message received on topic %s is %.*s.\n", topicName, m->payloadlen, (char*)(m->payload));
		MQTTClient_free(topicName);
		MQTTClient_freeMessage(&m);
		MQTTClient_receive(c, &topicName, &topicLen, &m, 1000);
	}
}

コード例 #2

ファイル: mqttclient_module.c プロジェクト: CJxD/paho.mqtt.c

static PyObject* mqttv3_receive(PyObject* self, PyObject *args)
{
	MQTTClient c;
	unsigned long timeout = 1000L;
	int rc;
	PyObject* temp = NULL;

	char* topicName;
	int topicLen;
	MQTTClient_message* message;

	if (!PyArg_ParseTuple(args, "k|k", &c, &timeout))
		return NULL;
	Py_BEGIN_ALLOW_THREADS rc = MQTTClient_receive(c, &topicName, &topicLen,
			&message, timeout);
	Py_END_ALLOW_THREADS
	if (message)
	{
		temp = Py_BuildValue("is#{ss#sisisisi}", rc, topicName, topicLen,
				"payload", message->payload, message->payloadlen, "qos",
				message->qos, "retained", message->retained, "dup",
				message->dup, "msgid", message->msgid);
		free(topicName);
		MQTTClient_freeMessage(&message);
	}
	else
		temp = Py_BuildValue("iz", rc, NULL);

	return temp;
}

コード例 #3

ファイル: onpush.c プロジェクト: milk-cocoa/c-examples

int main(int argc, char** argv)
{
	MQTTClient client;
	MQTTClient_connectOptions conn_opts = MQTTClient_connectOptions_initializer;
	char topic[128];
	int rc = 0;
	char url[100];

	create_push_topic(topic, "message");

	printf("topic is %s\n", topic);

  if (strchr(topic, '#') || strchr(topic, '+'))
		opts.showtopics = 1;
  if (opts.showtopics)
		printf("topic is %s\n", topic);

	sprintf(url, "%s:%s", opts.host, opts.port);

	rc = MQTTClient_create(&client, url, opts.clientid, MQTTCLIENT_PERSISTENCE_NONE, NULL);

	signal(SIGINT, cfinish);
	signal(SIGTERM, cfinish);

	conn_opts.keepAliveInterval = 10;
	conn_opts.reliable = 0;
	conn_opts.cleansession = 0;
	conn_opts.username = opts.token;
	conn_opts.password = opts.appid;
	
	myconnect(&client, &conn_opts);
	
	rc = MQTTClient_subscribe(client, topic, opts.qos);

	while (!toStop)
	{
		char* topicName = NULL;
		int topicLen;
		MQTTClient_message* message = NULL;
		
		rc = MQTTClient_receive(client, &topicName, &topicLen, &message, 1000);
		if (message)
		{
			if (opts.showtopics)
				printf("%s\t", topicName);
      if (opts.nodelimiter)
				printf("%.*s", message->payloadlen, (char*)message->payload);
			else
				printf("%.*s%s", message->payloadlen, (char*)message->payload, opts.delimiter);
			fflush(stdout);
			MQTTClient_freeMessage(&message);
			MQTTClient_free(topicName);
		}
		if (rc != 0)
			myconnect(&client, &conn_opts);
	}
	
	printf("Stopping\n");

	MQTTClient_disconnect(client, 0);

 	MQTTClient_destroy(&client);

	return 0;
}