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Advanced Network Programming in GoLang

Mehran 94

Generated using Lexica

Introduction

Network programming in Go (Golang) is accessible, powerful, and fun. This guide dives into the intricacies of network programming, covering protocols, TCP/UDP sockets, concurrency, and more, all enriched with detailed comments.

Key Concepts

1. Networking Protocols

  • TCP (Transmission Control Protocol): Ensures reliable data delivery.
  • UDP (User Datagram Protocol): Faster but doesn’t guarantee data delivery.

2. Sockets

  • TCP Sockets: Used for connection-oriented communication.
  • UDP Sockets: Used for connectionless communication.

3. Concurrency

  • Goroutines: Allow parallelism in your code.
  • Channels: Used for communication between goroutines.

Examples

Example 1: TCP Server and Client

A TCP server and client example demonstrate the basics of TCP communication.

Server

package main

import (
"net"
"fmt"
)

func main() {
// Listen on TCP port 8080 on all available unicast and
// any unicast IP addresses.
listen, err := net.Listen("tcp", ":8080")
if err != nil {
fmt.Println(err)
return
}
defer listen.Close()

// Infinite loop to handle incoming connections
for {
conn, err := listen.Accept()
if err != nil {
fmt.Println(err)
continue
}
// Launch a new goroutine to handle the connection
go handleConnection(conn)
}
}

func handleConnection(conn net.Conn) {
defer conn.Close()
buffer := make([]byte, 1024)
// Read the incoming connection into the buffer.
_, err := conn.Read(buffer)
if err != nil {
fmt.Println(err)
return
}
// Send a response back to the client.
conn.Write([]byte("Received: " + string(buffer)))
}

Client

package main

import (
"net"
"fmt"
)

func main() {
// Connect to the server at localhost on port 8080.
conn, err := net.Dial("tcp", "localhost:8080")
if err != nil {
fmt.Println(err)
return
}
defer conn.Close()…