How Can Go's `compress/gzip` Package Efficiently Gzip and Ungzip Files?

Using the "compress/gzip" Package to Gzip Files

Working with binary files in Go can be challenging, especially when dealing with compression formats. The "compress/gzip" package provides a straightforward solution for GZIP compression and decompression.

Compressing a File

To compress a file into the GZIP format, you can utilize the gzip.NewWriter function. Here's a code snippet that demonstrates how to do it:

package main

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

func main() {
    var b bytes.Buffer
    w := gzip.NewWriter(&b)
    w.Write([]byte("hello, world\n"))
    w.Close()

    // The compressed content is now available in the 'b' buffer.
}

Decompressing a File

To decompress the GZIP file, you can use the gzip.NewReader function. The following code shows how:

package main

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

func main() {
    var b bytes.Buffer

    // Assume you have the compressed content in the 'b' buffer.

    r, err := gzip.NewReader(&b)
    if err != nil {
        panic(err)
    }
    defer r.Close()
    
    io.Copy(os.Stdout, r)
}

By implementing these techniques, you can seamlessly handle GZIP compression and decompression in your Go programs.

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