Application skills of file buffering and network buffering of Golang functions

Golang is a fast and efficient programming language, and its functions provide application skills for file buffering and network buffering. File buffering is a buffering technique used in file operations to improve performance by reducing the number of reads and writes to files. Network buffering is a necessary skill in network communication, which can improve the efficiency of network transmission. The application of these two techniques will be described in detail below.

1. File buffering

1. Use bufio to read files

The bufio package implements buffered I/O operations. File operations can be greatly improved by using the bufio package. s efficiency. The bufio.Reader type provides a ReadBytes method to read data by bytes while efficiently utilizing buffers.

The following is a sample code:

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    file, err := os.Open("test.txt")
    if err != nil {
        panic(err)
    }
    defer file.Close()

    scanner := bufio.NewScanner(file)

    for scanner.Scan() {
        fmt.Println(scanner.Text())
    }

    if err := scanner.Err(); err != nil {
        panic(err)
    }
}

In the above code, bufio.NewScanner is used to create a scanner object, and then the scanner.Scan() method is used to read the file line by line. Due to the use of the bufio package, caching is performed when reading files, and the performance of file reading is improved.

2. Use bufio to write files

The bufio package can not only be used to read files, but also to write files. By using the bufio.Writer type, you can effectively utilize the buffer, reduce the number of times you write files, and improve the efficiency of file writing.

The following is a sample code:

package main

import (
    "bufio"
    "fmt"
    "os"
)

func main() {
    file, err := os.Create("test.txt")
    if err != nil {
        panic(err)
    }

    defer file.Close()

    writer := bufio.NewWriter(file)

    for i := 0; i < 10; i++ {
        fmt.Fprintln(writer, "Hello World")
    }

    writer.Flush()
}

In the above sample code, a writer object is created using bufio.NewWriter, and then the fmt.Fprintln method is used to write a string to a file. Use the Flush method to write the buffer's data to a file.

2. Network buffering

1. Use bufio to read network data

When using Golang for network programming, you need to often use the bufio package to read network data. Similar to file caching, network caching can also greatly improve the efficiency of network operations.

The following is a sample code:

package main

import (
    "bufio"
    "fmt"
    "net"
)

func main() {
    conn, err := net.Dial("tcp", "127.0.0.1:8000")

    if err != nil {
        fmt.Println("Error connecting:", err.Error())
        return
    }

    reader := bufio.NewReader(conn)

    for {
        line, _, err := reader.ReadLine()

        if err != nil {
            fmt.Println("Error reading:", err.Error())
            break
        }

        fmt.Println("Received:", string(line))
    }
}

In the above code, use net.Dial to create a TCP connection, and then use bufio.NewReader to create a reader object to read network data line by line. . Due to the use of the bufio package, network data is cached when reading, and the performance of network reading is improved.

2. Use bufio to write network data

In network programming, you can use the bufio package not only to read network data, but also to write network data. By using the bufio.Writer type, you can make good use of the buffer, reduce the number of times you write network data, and improve the efficiency of network writing.

The following is a sample code:

package main

import (
    "bufio"
    "fmt"
    "net"
)

func main() {
    conn, err := net.Dial("tcp", "127.0.0.1:8000")

    if err != nil {
        fmt.Println("Error connecting:", err.Error())
        return
    }

    writer := bufio.NewWriter(conn)

    for i := 0; i < 10; i++ {
        fmt.Fprintln(writer, "Hello World")
    }

    writer.Flush()
}

In the above sample code, use net.Dial to create a TCP connection, and then use bufio.NewWriter to create a writer object and write the string in the network. Use the Flush method to write buffer data to the network.

Summary:

This article introduces in detail the application skills of file buffering and network buffering provided by Golang functions. For scenarios that require a large amount of reading and writing files and network data, using caching techniques can effectively improve program performance and reduce resource consumption. It is recommended to make full use of Golang's caching function in actual development to further improve program efficiency.

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