How Can I Use Go's 'compress/gzip' Package for Efficient File Compression and Decompression?

Gzip File Compression in Go with the "compress/gzip" Package

File compression is often essential for optimizing data transfer and storage. In Go, the "compress/gzip" package provides a convenient solution for gzip compression. Here's how to use this package:

Compressing a File

import (
    "bytes"
    "compress/gzip"
    "io"
    "os"
)

func compressFile(sourceFile, compressedFile string) error {
    input, err := os.ReadFile(sourceFile)
    if err != nil {
        return err
    }

    var b bytes.Buffer
    w := gzip.NewWriter(&b)
    if _, err := w.Write(input); err != nil {
        return err
    }
    if err := w.Close(); err != nil {
        return err
    }

    if err := os.WriteFile(compressedFile, b.Bytes(), 0644); err != nil {
        return err
    }

    return nil
}

Reading a Compressed File Directly

To read a compressed file directly, you can use the gzip.NewReader function:

func readCompressedFile(compressedFile string) error {
    f, err := os.Open(compressedFile)
    if err != nil {
        return err
    }
    defer f.Close()

    r, err := gzip.NewReader(f)
    if err != nil {
        return err
    }
    defer r.Close()

    if _, err := io.Copy(os.Stdout, r); err != nil {
        return err
    }

    return nil
}

By using these functions, you can easily compress and decompress files in Go, allowing you to optimize data transfer and storage efficiently.

The above is the detailed content of How Can I Use Go's 'compress/gzip' Package for Efficient File Compression and Decompression?. For more information, please follow other related articles on the PHP Chinese website!