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fs_archive.go
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/
fs_archive.go
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// Copyright 2016 Stellar Development Foundation and contributors. Licensed
// under the Apache License, Version 2.0. See the COPYING file at the root
// of this distribution or at http://www.apache.org/licenses/LICENSE-2.0
package archivist
import (
"io"
"os"
"path"
"path/filepath"
)
type FsArchiveBackend struct {
prefix string
}
func (b *FsArchiveBackend) GetFile(pth string) (io.ReadCloser, error) {
return os.Open(path.Join(b.prefix, pth))
}
func (b *FsArchiveBackend) Exists(pth string) bool {
pth = path.Join(b.prefix, pth)
_, err := os.Stat(pth)
if err != nil && os.IsNotExist(err) { return false }
return true
}
func (b *FsArchiveBackend) PutFile(pth string, in io.ReadCloser) error {
dir := path.Join(b.prefix, path.Dir(pth))
if !b.Exists(dir) {
if e := os.MkdirAll(dir, 0755); e != nil {
return e
}
}
pth = path.Join(b.prefix, pth)
out, e := os.Create(pth)
if e != nil {
return e
}
defer in.Close()
defer out.Close()
_, e = io.Copy(out, in)
return e
}
func (b *FsArchiveBackend) ListFiles(pth string) (chan string, chan error) {
ch := make(chan string)
errs := make(chan error)
go func() {
filepath.Walk(path.Join(b.prefix, pth),
func(p string, info os.FileInfo, err error) error {
if err != nil {
errs <- err
return nil
}
if info != nil && ! info.IsDir() {
ch <- p
}
return nil
})
close(ch)
close(errs)
}()
return ch, errs
}
func (b *FsArchiveBackend) CanListFiles() bool {
return true
}
func MakeFsBackend(pth string, opts *ConnectOptions) ArchiveBackend {
return &FsArchiveBackend{
prefix: pth,
}
}