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golang: gzip and gunzip
package main
import (
"bytes"
"compress/gzip"
"fmt"
"io"
"log"
)
func gUnzipData(data []byte) (resData []byte, err error) {
b := bytes.NewBuffer(data)
var r io.Reader
r, err = gzip.NewReader(b)
if err != nil {
return
}
var resB bytes.Buffer
_, err = resB.ReadFrom(r)
if err != nil {
return
}
resData = resB.Bytes()
return
}
func gZipData(data []byte) (compressedData []byte, err error) {
var b bytes.Buffer
gz := gzip.NewWriter(&b)
_, err = gz.Write(data)
if err != nil {
return
}
if err = gz.Flush(); err != nil {
return
}
if err = gz.Close(); err != nil {
return
}
compressedData = b.Bytes()
return
}
func main() {
// define original data
data := []byte(`MyzYrIyMLyNqwDSTBqSwM2D6KD9sA8S/d3Vyy6ldE+oRVdWyqNQrjTxQ6uG3XBOS0P4GGaIMJEPQ/gYZogwkQ+A0/gSU03fRJvdhIGQ1AMARVdWyqNQrjRFV1bKo1CuNEVXVsqjUK40RVdWyqNQrjRFV1bKo1CuNPmQF870PPsnSNeKI1U/MrOA0/gSU03fRb2A3OsnORNIruhCUYTIrOMTNU7JuGb5RSYJxa6PiMHdiRmFtXLNoY+GVmTD7aOV/K1yo4y0dR7Q=`)
fmt.Println("original data:", data)
fmt.Println("original data len:", len(data))
// compress data
compressedData, compressedDataErr := gZipData(data)
if compressedDataErr != nil {
log.Fatal(compressedDataErr)
}
fmt.Println("compressed data:", compressedData)
fmt.Println("compressed data len:", len(compressedData))
// uncompress data
uncompressedData, uncompressedDataErr := gUnzipData(compressedData)
if uncompressedDataErr != nil {
log.Fatal(uncompressedDataErr)
}
fmt.Println("uncompressed data:", uncompressedData)
fmt.Println("uncompressed data len:", len(uncompressedData))
}
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