How to write to gzipped file in Go

This example shows you how to directly write gzip-compressed data using Go’s gzip library.

First, open the file and use gzip.NewWriter() to create a new io.Writer on it:

// Open file
f, _ := os.Create("test.txt.gz")
defer f.Close()
// Create gzip writer
gzWriter := gzip.NewWriter(f)

Now you can gzWriter.Write(). Don’t forget to gzWriter.Close()

content := "Hello World!"
gzWriter.Write([]byte(content))
gzWriter.Close()

Full example:

package main

import (
    "compress/gzip"
    "os"
)

func main() {
    // Open file
    f, _ := os.Create("test.txt.gz")
    defer f.Close()
    // Create gzip writer
    gzWriter := gzip.NewWriter(f)
    // Write content and close
    content := "Hello World!"
    gzWriter.Write([]byte(content))
    gzWriter.Close()
}

You can use zcat test.txt.gz to see that the content has been written to the file correctly.