forked from TrueCloudLab/restic
103 lines
2.8 KiB
Go
103 lines
2.8 KiB
Go
package webdav
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import (
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"context"
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"io"
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"os"
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"github.com/anacrolix/fuse"
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"github.com/anacrolix/fuse/fs"
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"github.com/restic/restic/internal/debug"
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"golang.org/x/net/webdav"
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)
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type fuseDir interface {
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fs.Node
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fs.HandleReadDirAller
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fs.NodeStringLookuper
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}
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// RepoDir implements a read-only directory
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type RepoDir struct {
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name string
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dir fuseDir
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ctx context.Context
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}
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// statically ensure that RepoDir implements webdav.File
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var _ webdav.File = &RepoDir{}
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func (f *RepoDir) Write(p []byte) (int, error) {
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return 0, webdav.ErrForbidden
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}
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// Close closes the repo file.
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func (f *RepoDir) Close() error {
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debug.Log("Close %v", f.name)
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return nil
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}
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// Read reads up to len(p) byte from the file.
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func (f *RepoDir) Read(p []byte) (int, error) {
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debug.Log("")
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return 0, io.EOF
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}
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// Seek sets the offset for the next Read or Write to offset, interpreted
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// according to whence: SeekStart means relative to the start of the file,
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// SeekCurrent means relative to the current offset, and SeekEnd means relative
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// to the end. Seek returns the new offset relative to the start of the file
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// and an error, if any.
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func (f *RepoDir) Seek(offset int64, whence int) (int64, error) {
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debug.Log("Seek %v", f.name)
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return 0, webdav.ErrForbidden
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}
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// Readdir reads the contents of the directory associated with file and returns
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// a slice of up to n FileInfo values, as would be returned by Lstat, in
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// directory order. Subsequent calls on the same file will yield further
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// FileInfos.
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//
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// If n > 0, Readdir returns at most n FileInfo structures. In this case, if
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// Readdir returns an empty slice, it will return a non-nil error explaining
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// why. At the end of a directory, the error is io.EOF.
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//
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// If n <= 0, Readdir returns all the FileInfo from the directory in a single
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// slice. In this case, if Readdir succeeds (reads all the way to the end of
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// the directory), it returns the slice and a nil error. If it encounters an
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// error before the end of the directory, Readdir returns the FileInfo read
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// until that point and a non-nil error.
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func (f *RepoDir) Readdir(count int) (entries []os.FileInfo, err error) {
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debug.Log("Readdir %v, count %d", f.name, count)
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dirent, err := f.dir.ReadDirAll(f.ctx)
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entries = make([]os.FileInfo, 0, len(dirent))
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for _, node := range dirent {
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if node.Name == "." || node.Name == ".." {
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continue
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}
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fsNode, err := f.dir.Lookup(f.ctx, node.Name)
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if err != nil {
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return nil, err
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}
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var attr fuse.Attr
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err = fsNode.Attr(f.ctx, &attr)
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if err != nil {
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return nil, err
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}
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entries = append(entries, fileInfoFromAttr(node.Name, attr))
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}
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return entries, nil
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}
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// Stat returns a FileInfo describing the named file.
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func (f *RepoDir) Stat() (os.FileInfo, error) {
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debug.Log("Stat %v", f.name)
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var attr fuse.Attr
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f.dir.Attr(f.ctx, &attr)
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return fileInfoFromAttr(f.name, attr), nil
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}
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