package compress/flate
Golang compress/flate.NewWriter() and NewWriterDict() functions usage example.
package main
import (
"compress/flate"
"fmt"
"io"
"os"
)
func main() {
inputFile, err := os.Open("file.txt")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer inputFile.Close()
outputFile, err := os.Create("file.txt.compressed")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer outputFile.Close()
flateWriter, err := flate.NewWriter(outputFile, flate.BestCompression)
if err != nil {
fmt.Println("NewWriter error ", err)
os.Exit(1)
}
defer flateWriter.Close()
io.Copy(flateWriter, inputFile)
flateWriter.Flush() // remember to flush!
}
and if you want to compress the file with your own dictionary, use NewWriterDict() function instead
var dict = "test files for Golang"
flateWriter, err := flate.NewWriterDict(outputFile, flate.BestCompression, []byte(dict))
References :
https://golang.org/pkg/compress/flate/#NewWriter
https://golang.org/pkg/compress/flate/#NewWriterDict
