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package weed_server
import (
"context"
"golang.org/x/net/webdav"
"io/fs"
"os"
"strings"
)
type wrappedFs struct {
subFolder string
webdav.FileSystem
}
// NewWrappedFs returns a webdav.FileSystem identical to fs, except it
// provides access to a sub-folder of fs that is denominated by subFolder.
// It transparently handles renaming paths and filenames so that the outer part of the wrapped filesystem
// does not leak out.
func NewWrappedFs(fs webdav.FileSystem, subFolder string) webdav.FileSystem {
return wrappedFs{
subFolder: subFolder,
FileSystem: fs,
}
}
func (w wrappedFs) Mkdir(ctx context.Context, name string, perm os.FileMode) error {
name = w.subFolder + name
return w.FileSystem.Mkdir(ctx, name, perm)
}
func (w wrappedFs) OpenFile(ctx context.Context, name string, flag int, perm os.FileMode) (webdav.File, error) {
name = w.subFolder + name
file, err := w.FileSystem.OpenFile(ctx, name, flag, perm)
file = wrappedFile{
File: file,
subFolder: &w.subFolder,
}
return file, err
}
func (w wrappedFs) RemoveAll(ctx context.Context, name string) error {
name = w.subFolder + name
return w.FileSystem.RemoveAll(ctx, name)
}
func (w wrappedFs) Rename(ctx context.Context, oldName, newName string) error {
oldName = w.subFolder + oldName
newName = w.subFolder + newName
return w.FileSystem.Rename(ctx, oldName, newName)
}
func (w wrappedFs) Stat(ctx context.Context, name string) (os.FileInfo, error) {
name = w.subFolder + name
info, err := w.FileSystem.Stat(ctx, name)
info = wrappedFileInfo{
subFolder: &w.subFolder,
FileInfo: info,
}
return info, err
}
type wrappedFile struct {
webdav.File
subFolder *string
}
func (w wrappedFile) Readdir(count int) ([]fs.FileInfo, error) {
infos, err := w.File.Readdir(count)
for i, info := range infos {
infos[i] = wrappedFileInfo{
subFolder: w.subFolder,
FileInfo: info,
}
}
return infos, err
}
func (w wrappedFile) Stat() (fs.FileInfo, error) {
info, err := w.File.Stat()
info = wrappedFileInfo{
subFolder: w.subFolder,
FileInfo: info,
}
return info, err
}
type wrappedFileInfo struct {
subFolder *string
fs.FileInfo
}
func (w wrappedFileInfo) Name() string {
name := w.FileInfo.Name()
return strings.TrimPrefix(name, *w.subFolder)
}
func (w wrappedFileInfo) ETag(ctx context.Context) (string, error) {
etag, _ := w.FileInfo.(webdav.ETager).ETag(ctx)
if len(etag) == 0 {
return etag, webdav.ErrNotImplemented
}
return etag, nil
}
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