How to implement a TCP client that sends and receives data in Go?

To implement a TCP client that sends and receives data in Go, you can follow these steps:

Step 1: Import the required packages

import (
    "fmt"
    "net"
    "os"
)

Step 2: Define the server address and port

const ServerAddr = "127.0.0.1:1234"

Step 3: Create a TCP connection to the server

conn, err := net.Dial("tcp", ServerAddr)
if err != nil {
    fmt.Println("Error connecting:", err)
    os.Exit(1)
}
defer conn.Close()

Step 4: Send data to the server

data := "Hello, server!"
conn.Write([]byte(data))

Step 5: Receive data from the server

buffer := make([]byte, 1024)
n, err := conn.Read(buffer)
if err != nil {
    fmt.Println("Error reading:", err)
    os.Exit(1)
}
receivedData := string(buffer[:n])
fmt.Println("Server response:", receivedData)

Complete example:

package main

import (
    "fmt"
    "net"
    "os"
)

const ServerAddr = "127.0.0.1:1234"

func main() {
    conn, err := net.Dial("tcp", ServerAddr)
    if err != nil {
        fmt.Println("Error connecting:", err)
        os.Exit(1)
    }
    defer conn.Close()

    data := "Hello, server!"
    conn.Write([]byte(data))

    buffer := make([]byte, 1024)
    n, err := conn.Read(buffer)
    if err != nil {
        fmt.Println("Error reading:", err)
        os.Exit(1)
    }
    receivedData := string(buffer[:n])
    fmt.Println("Server response:", receivedData)
}

Make sure to replace ServerAddr with the actual address and port of your server.