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package main
import (
"fmt"
"io"
"os"
"os/exec"
"path/filepath"
)
func CompressPDF(source string, target string) error {
cmd := "gs"
args := []string{
"-sDEVICE=pdfwrite", "-dCompatibilityLevel=1.4",
"-dPDFSETTINGS=/screen", "-dNOPAUSE", "-dQUIET", "-dBATCH",
"-sOutputFile=" + target, source}
return exec.Command(cmd, args...).Run()
}
func FileSize(filename string) int64 {
fi, err := os.Stat(filename)
if err != nil {
return 10000000
}
return fi.Size()
}
func FileCopy(src, dst string) error {
in, err := os.Open(src)
if err != nil {
return err
}
defer in.Close()
out, err := os.Create(dst)
if err != nil {
return err
}
defer out.Close()
_, err = io.Copy(out, in)
if err != nil {
return err
}
return out.Close()
}
func CompressPDFinDir(dirname string) error {
pattern := (dirname) + "/*_*.pdf"
matches, err := filepath.Glob(pattern)
if err != nil {
return err
}
for _, match := range matches {
target := match[:len(match)-3] + "cpdf"
if _, err := os.Stat(target); os.IsNotExist(err) {
fmt.Println("Compress", match, target)
CompressPDF(match, target)
}
}
return nil
}