How to perform network programming in go language

The steps for network programming in Go language are as follows: 1. Import the net package and other required packages; 2. Create a server or client connection; 3. Process the connection and create a new "goroutine" for each connection. " to process; 4. Process the data, use "conn.Read()" to read the data, and use "conn.Write()" to send the data; 5. "conn.Close()" to close the connection.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

Steps for Go language network programming:

1. Import net package and other required packages

import (
    "fmt"
    "net"
)

2. Create server or client connection

Server:

ln, err := net.Listen("tcp", ":8080")
if err != nil {
    // 处理错误
}
defer ln.Close()

Client:

conn, err := net.Dial("tcp", "127.0.0.1:8080")
if err != nil {
    // 处理错误
}
defer conn.Close()

3. Handling connections

On the server side, we need to The connection creates a new goroutine to process it:

for {
    conn, err := ln.Accept()
    if err != nil {
        // 处理错误
    }
    go handleConnection(conn)
}

func handleConnection(conn net.Conn) {
    // 处理连接逻辑
}

4. Processing data

On both the server side and the client side, we can use conn.Read() to read data , use conn.Write() to send data. When processing this data, we need to pay attention to the following points:

• The data read may be less than the requested data, and multiple reads are required until all data is read.
• The written data may need to be cached, and bufio.Writer needs to be used for caching.
• When processing strings, you need to consider the character set encoding. UTF-8 encoding is recommended in Go language.

1. Close the connection

After processing the connection, we need to close the connection:

conn.Close()

The above is a simple Go language network programming A step of. Of course, in actual applications, more complex scenarios may need to be handled, such as multiple concurrent connections, timeout processing, error handling, etc. But the basic steps and principles are similar.

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