Golang : Decompress zlib file example
Continuation from previous tutorial on how to zlib compress a file. In this part, we will learn how to decompress a file that was compressed with zlib compression algorithm.
Here are the codes :
package main
import (
"compress/zlib"
"flag"
"fmt"
"io"
"os"
"strings"
)
func main() {
flag.Parse() // get the arguments from command line
filename := flag.Arg(0)
if filename == "" {
fmt.Println("Usage : unzlib sourcefile.zlib")
os.Exit(1)
}
zlibfile, err := os.Open(filename)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
reader, err := zlib.NewReader(zlibfile)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer reader.Close()
newfilename := strings.TrimSuffix(filename, ".zlib")
writer, err := os.Create(newfilename)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer writer.Close()
if _, err = io.Copy(writer, reader); err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Decompressed to ", newfilename)
}
Sample output :
./unzlib uncompressed.txt.zlib
Decompressed to uncompressed.txt
./unzlib
Usage : unzlib sourcefile.zlib
References :
http://golang.org/pkg/compress/zlib/
https://www.socketloop.com/tutorials/golang-zlib-compress-file-example
See also : Golang : zlib compress file example
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+16.6k Golang : Iterate linked list example
+21.5k Golang : Convert Unix timestamp to UTC timestamp
+8.4k Golang : Scramble and unscramble text message by randomly replacing words
+5k Javascript : How to replace HTML inside <div>?
+19.8k Golang : Convert PNG transparent background image to JPG or JPEG image
+8.3k Golang : How to get username from email address
+4.8k Unix/Linux : How to find out the hard disk size?
+8.6k Golang : Extract or copy items from map based on value
+22k Golang : Gorilla mux routing example
+5.6k Golang : Experimental emojis or emoticons icons programming language
+6.9k Golang : Test if an input is an Armstrong number example
+14k Golang : How to check for empty array string or string?