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
+5k Golang : Extract unicode string from another unicode string example
+15.2k Golang : Fix cannot convert buffer (type *bytes.Buffer) to type string error
+11.2k Golang : Extract part of string with regular expression
+3.7k Golang : How to pass data between controllers with JSON Web Token
+4.5k Swift : Convert string array to array example
+15.2k Golang : Send email and SMTP configuration example
+6.7k Golang : Test if an input is an Armstrong number example
+5.9k Golang : Normalize email to prevent multiple signups example
+61.4k Golang : Convert HTTP Response body to string
+6.8k Golang : Sort words with first uppercase letter
+13.5k Golang : Normalize unicode strings for comparison purpose
+3.9k Unix/Linux : How to pipe/save output of a command to file?