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|
package main
import (
"crypto/sha1"
"encoding/hex"
"fmt"
"io"
"io/fs"
"log"
"os"
"path"
"path/filepath"
)
const (
chunkSize = 8 << 10
)
type File struct {
Path string
Size int64
}
func ListFiles(path string, files chan File) {
err := filepath.Walk(path,
func(path string, i fs.FileInfo, err error) error {
if err != nil {
log.Println(err)
return err
}
if i.IsDir() {
return nil
}
var file = File{path, i.Size()}
files <- file
return nil
})
if err != nil {
log.Println(err)
}
close(files)
}
func ReadFiles(files chan File, chunks chan []byte) {
var buff []byte
var prev, read = chunkSize, 0
for f := range files {
file, err := os.Open(f.Path)
if err != nil {
log.Println(err)
continue
}
for err != io.EOF {
if prev == chunkSize {
buff = make([]byte, chunkSize)
prev, err = file.Read(buff)
} else {
read, err = file.Read(buff[prev:])
prev += read
}
if err != nil && err != io.EOF {
log.Println(err)
}
if prev == chunkSize {
chunks <- buff
}
}
}
chunks <- buff
close(chunks)
}
func PrintChunks(chunks chan []byte) {
for c := range chunks {
fmt.Println(c)
}
}
func DumpChunks(dest string, chunks chan []byte) {
for c := range chunks {
sum := sha1.Sum(c)
path := path.Join(dest, hex.EncodeToString(sum[:]))
os.WriteFile(path, c, 0664)
}
}
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