#include
#include"zmq.h"
#include"zmq_utils.h"
#include"helloworld.pb.h"
const int bufflen = 128;
using namespace std;
int main()
{
void *context = zmq_ctx_new();
void responder = zmq_socket(context, ZMQ_REP);
zmq_bind(responder, "tcp://:5555");
while (1)
{
zmq_msg_t request;
zmq_msg_init(&request);
int size = zmq_msg_recv(&request, responder, 0);
char buff[bufflen];//这个声明位置的不对会导致程序崩溃,原因见下面的分析。这个是C语言的特性。因为zmq内部实现为C语言。
memcpy(buff, zmq_msg_data(&request), size);
helloworld rec;
rec.ParseFromArray(buff, bufflen);
cout << "id: " << rec.id() << "\t"
<< "str: " << rec.str() << "\n";
zmq_msg_close(&request);
Sleep(200);
memset(buff, 0,bufflen * sizeof(char));
helloworld msg;
msg.set_id(303);
msg.set_str("how");
msg.SerializeToArray(buff, bufflen);
int len = strlen(buff);
zmq_msg_t reply;
zmq_msg_init_size(&reply, len);
/*
if (0 != zmq_msg_init_size(&reply, len));
{
cout << "zmq_msg_init failed" << endl;
break;
}
*/
memcpy(zmq_msg_data(&reply), buff, len);
zmq_msg_send(&reply, responder, 0);
/*
if (len = zmq_msg_send(&reply, responder, 0))
{
zmq_msg_close(&reply);
cout << "send failed..." << endl;
break;
}
*/
cout << "id: " << msg.id() << "\t"
<< "str: " << msg.str() << "\n";
zmq_msg_close(&reply);
}
zmq_close(&responder);
zmq_ctx_destroy(context);
system(“pause”);
return 0;
}
由于zmq的实现是C语言的,所以在变量声明中要注意声明的顺序。
最好用的时候再声明。解释是:编译器可能按声明变量顺序安排他们的位置,对字符串操作严重依赖在何处能找到字符串结束标志,如果没有,就用最近的’\0’,而它很可能是你上次赋值的其他变量的值的一部分。
客户端代码:
#include
#include"zmq.h"
#include"zmq_utils.h"
#include"helloworld.pb.h"
using namespace std;
const int bufflen = 128;
int main()
{
void *context = zmq_ctx_new();
void *requester = zmq_socket(context, ZMQ_REQ);
zmq_connect(requester, “tcp://127.0.0.1:5555”);
cout << “Connect to server success…” << endl;
while (1)
{
helloworld msg;
msg.set_id(101);
msg.set_str(“hello”);
char buffer[bufflen];
msg.SerializeToArray(buffer, bufflen);
int len = strlen(buffer);
zmq_msg_t req;
if (0 != zmq_msg_init_size(&req, len))
{
cout << "zmq_msg_init failed..." << endl;
break;
}
memcpy(zmq_msg_data(&req), buffer, len);
if (len != zmq_msg_send(&req, requester, 0))
{
zmq_msg_close(&req);
cout << "send failed.." << endl;
break;
}
cout << "id: " << msg.id() << "\t"
<< "str: " << msg.str() << "\n";
zmq_msg_close(&req);
Sleep(200);
memset(buffer, 0, bufflen * sizeof(char));
zmq_msg_t reply;
zmq_msg_init(&reply);
int size = zmq_msg_recv(&reply, requester, 0);
memcpy(buffer, zmq_msg_data(&reply), size);
helloworld rec;
rec.ParseFromArray(buffer, bufflen);
cout << "id: " << rec.id() << "\t"
<< "str: " << rec.str() << "\n";
zmq_msg_close(&reply);
}
zmq_close(&requester);
zmq_ctx_destroy(context);
system(“pause”);
return 0;
}
很好用啊。而且很强大。执行结果: