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zip.go
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zip.go
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package mutators
import (
"archive/zip"
"bytes"
"fmt"
"io"
"path/filepath"
"github.com/batmac/ccat/pkg/globalctx"
"github.com/batmac/ccat/pkg/log"
)
func init() {
singleRegister("unzip", unzip, withDescription("decompress the first file in a zip archive"),
withCategory("decompress"),
)
singleRegister("zip", czip, withDescription("compress to zip data"),
withCategory("compress"),
)
}
func unzip(out io.WriteCloser, in io.ReadCloser, _ any) (int64, error) {
dat, err := io.ReadAll(in)
if err != nil {
log.Fatal(err)
}
// Open a zip archive for reading.
r, err := zip.NewReader(bytes.NewReader(dat), int64(len(dat)))
if err != nil {
log.Fatal(err)
}
// return the first file
for _, f := range r.File {
log.Debugf("found file %s\n", f.Name)
rc, err := f.Open()
if err != nil {
log.Debugln(err)
continue
}
//#nosec
n, err := io.Copy(out, rc)
if err != nil {
log.Fatal(err)
}
rc.Close()
return n, nil
}
return 0, fmt.Errorf("no extractable File found")
}
func czip(out io.WriteCloser, in io.ReadCloser, _ any) (int64, error) {
z := zip.NewWriter(out)
defer z.Close()
f, err := z.Create(filename())
if err != nil {
//nolint:gocritic // exitAfterDefer
log.Fatal(err)
}
return io.Copy(f, in)
}
func filename() string {
name := filepath.Base(globalctx.Get("path").(string))
return name
}