How to open and read data from a compressed file in Go?

To open and read data from a compressed file in Go, you can use the compress/gzip package.

Here's an example code snippet to demonstrate how to open and read a gzip compressed file:

package main

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

func main() {
	// Open the compressed file
	file, err := os.Open("file.gz")
	if err != nil {
		log.Fatal(err)
	}
	defer file.Close()

	// Create a gzip reader
	reader, err := gzip.NewReader(file)
	if err != nil {
		log.Fatal(err)
	}
	defer reader.Close()

	// Read and print the uncompressed data
	buf := make([]byte, 1024)
	for {
		n, err := reader.Read(buf)
		if err != nil && err != io.EOF {
			log.Fatal(err)
		}
		if n == 0 {
			break
		}
		fmt.Print(string(buf[:n]))
	}
}

In the above code, replace "file.gz" with the path to your actual compressed file. The code uses os.Open to open the file and then creates a gzip.NewReader to read the compressed data. The data is read in chunks using the reader.Read function, and the uncompressed data is printed to the console.

Make sure to import the required packages compress/gzip, fmt, io, and log.