How Can I Efficiently Compress and Decompress Files Using Go's `compress/gzip` Package?

Utilizing the "compress/gzip" Package for File Compression

For those unfamiliar with Go, leveraging the "compress/gzip" package for file compression can seem daunting. This guide will provide a comprehensive example to simplify the process.

Understanding the Interface

All compress packages employ a standardized interface for compression and decompression.

Compressing a File

To compress a file, follow these steps:

import (
    "bytes"
    "compress/gzip"
)

// Create an in-memory buffer
var b bytes.Buffer

// Create a gzip writer using the buffer
w := gzip.NewWriter(&b)

// Write data to the gzip writer
w.Write([]byte("Hello, world!"))

// Close the gzip writer to finish compression
w.Close()

The compressed file is now stored in the b buffer.

Decompressing a File

To unzip the previously compressed data, use this method:

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

r, err := gzip.NewReader(&b)
if err != nil {
    // Handle error
}

// Copy the decompressed data to standard output
io.Copy(os.Stdout, r)

// Close the gzip reader
r.Close()

By following these steps, you can seamlessly compress and decompress files using the "compress/gzip" package.

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