# msys2 ucrt64 gcc 설치

# go 프로젝트 폴더로 복사
```
C:\Users\j\+win\vcpkg\packages\zeromq_x64-windows\bin\libzmq-mt-4_3_5.dll
```

# server.go
```go
package main

/*
#cgo CFLAGS: -IC:/Users/j/+win/vcpkg/packages/zeromq_x64-windows/include
#cgo LDFLAGS: -LC:/Users/j/+win/vcpkg/packages/zeromq_x64-windows/lib -lzmq-mt-4_3_5
#include <zmq.h>
*/
import "C"
import (
    "fmt"
    "unsafe"
)
func main() {
	context := C.zmq_ctx_new()
	defer C.zmq_ctx_term(context)

	socket := C.zmq_socket(context, C.ZMQ_REP)
	defer C.zmq_close(socket)

	C.zmq_bind(socket, C.CString("tcp://*:5555"))

	for {
			msg := C.zmq_msg_t{}
			C.zmq_msg_init(&msg)
			defer C.zmq_msg_close(&msg)

			C.zmq_msg_recv(&msg, socket, 0)
			size := C.zmq_msg_size(&msg)
			data := C.zmq_msg_data(&msg)

			goData := C.GoBytes(data, C.int(size))
			fmt.Printf("Received: %s\n", string(goData))

			C.zmq_send(socket, unsafe.Pointer(&goData[0]), C.size_t(len(goData)), 0)
	}
}
```


# client.py
```py
import zmq
import time

context = zmq.Context()

print("Connecting to server...")
socket = context.socket(zmq.REQ)
socket.connect("tcp://localhost:5555")

for request in range(10):
    print(f"Sending request {request} ...")
    socket.send(f"Hello {request}".encode())

    #  Get the reply.
    message = socket.recv()
    print(f"Received reply {request} [ {message.decode()} ]")

    # Wait for a second before next request
    time.sleep(1)
```