~/Socket Programming in Golang
Mar 16, 2021
Socket programming in Golang allows direct network communication using TCP or UDP. The standard library net package provides the necessary tools.
Example: Simple TCP server.
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package main
import (
"net"
"fmt"
)
func main() {
ln, err := net.Listen("tcp", ":8080")
if err != nil {
panic(err)
}
defer ln.Close()
for {
conn, err := ln.Accept()
if err != nil {
continue
}
go handleConnection(conn)
}
}
func handleConnection(conn net.Conn) {
defer conn.Close()
buf := make([]byte, 1024)
n, err := conn.Read(buf)
if err == nil {
conn.Write([]byte("Received: " + string(buf[:n])))
}
}
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Client example:
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package main
import (
"net"
"fmt"
"os"
)
func main() {
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer conn.Close()
conn.Write([]byte("Hello server"))
buf := make([]byte, 1024)
n, _ := conn.Read(buf)
fmt.Println(string(buf[:n]))
}
|
The net.Conn interface provides methods for reading and writing. Error handling is essential for robust network programming. For UDP, use net.ListenPacket instead.
For more, see the Go net package docs.