How to compress data using the compress/zlib package in Go?

To compress data using the compress/zlib package in Go, you can follow these steps:

Import the required packages:

import (
	"bytes"
	"compress/zlib"
	"fmt"
	"io/ioutil"
)

Create a function to compress the data:

func compressData(data []byte) ([]byte, error) {
	var buf bytes.Buffer
	w := zlib.NewWriter(&buf)

	_, err := w.Write(data)
	if err != nil {
		return nil, err
	}

	err = w.Close()
	if err != nil {
		return nil, err
	}

	return buf.Bytes(), nil
}

Use the compressData function to compress your data:

func main() {
	// Sample data to compress
	data := []byte("Lorem ipsum dolor sit amet")

	compressedData, err := compressData(data)
	if err != nil {
		fmt.Println("Compression failed:", err)
		return
	}

	fmt.Println("Original data size:", len(data))
	fmt.Println("Compressed data size:", len(compressedData))
}

The compressData function takes a byte slice as input and returns a compressed byte slice. It uses a zlib.Writer to compress the data and writes it to a buffer. Finally, it closes the writer and returns the compressed data.

Note: Make sure to handle any errors that may occur during compression or decompression.