Reputation: 367
I found this example https://play.golang.org/p/zyZJKGFfyT
package main
import (
"fmt"
"net"
"os"
)
// echo "Hello server" | nc localhost 5555
const (
CONN_HOST = "localhost"
CONN_PORT = "5555"
CONN_TYPE = "tcp"
)
func main() {
// Listen for incoming connections.
l, err := net.Listen(CONN_TYPE, CONN_HOST+":"+CONN_PORT)
if err != nil {
fmt.Println("Error listening:", err.Error())
os.Exit(1)
}
// Close the listener when the application closes.
defer l.Close()
fmt.Println("Listening on " + CONN_HOST + ":" + CONN_PORT)
for {
// Listen for an incoming connection.
conn, err := l.Accept()
if err != nil {
fmt.Println("Error accepting: ", err.Error())
os.Exit(1)
}
// Handle connections in a new goroutine.
go handleRequest(conn)
}
}
// Handles incoming requests.
func handleRequest(conn net.Conn) {
// Make a buffer to hold incoming data.
buf := make([]byte, 1024)
// Read the incoming connection into the buffer.
reqLen, err := conn.Read(buf)
reqLen = reqLen
if err != nil {
fmt.Println("Error reading:", err.Error())
}
// Send a response back to person contacting us.
conn.Write([]byte("hello") )
conn.Close()
}
echo "test" | nc 127.0.0.1 5555
What is the best way to keep a TCP server with GO listening in production? in localhost work fine but production
Upvotes: 2
Views: 1545
Reputation: 239712
Taking out my crystal ball: I believe your problem is that your server is only listening on localhost, but you want to be able to connect to it from other machines. Change CONN_HOST
from "localhost"
to ""
(empty string), so that net.Listen
will be listening on :5555
. That means that connections will be accepted on any interface on port 5555.
Upvotes: 3