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126 lines
2.7 KiB
126 lines
2.7 KiB
// sftp_helpers.go
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package sftpd
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import (
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"io"
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"os"
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"sync"
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"time"
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"github.com/pkg/sftp"
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"github.com/seaweedfs/seaweedfs/weed/glog"
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"github.com/seaweedfs/seaweedfs/weed/util"
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)
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// FileInfo implements os.FileInfo.
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type FileInfo struct {
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name string
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size int64
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mode os.FileMode
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modTime time.Time
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isDir bool
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}
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func (fi *FileInfo) Name() string { return fi.name }
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func (fi *FileInfo) Size() int64 { return fi.size }
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func (fi *FileInfo) Mode() os.FileMode { return fi.mode }
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func (fi *FileInfo) ModTime() time.Time { return fi.modTime }
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func (fi *FileInfo) IsDir() bool { return fi.isDir }
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func (fi *FileInfo) Sys() interface{} { return nil }
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// bufferReader wraps a byte slice to io.ReaderAt.
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type bufferReader struct {
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b []byte
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i int64
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}
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func NewBufferReader(b []byte) *bufferReader { return &bufferReader{b: b} }
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func (r *bufferReader) Read(p []byte) (int, error) {
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if r.i >= int64(len(r.b)) {
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return 0, io.EOF
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}
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n := copy(p, r.b[r.i:])
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r.i += int64(n)
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return n, nil
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}
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func (r *bufferReader) ReadAt(p []byte, off int64) (int, error) {
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if off >= int64(len(r.b)) {
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return 0, io.EOF
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}
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n := copy(p, r.b[off:])
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if n < len(p) {
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return n, io.EOF
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}
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return n, nil
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}
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// listerat implements sftp.ListerAt.
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type listerat []os.FileInfo
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func (l listerat) ListAt(ls []os.FileInfo, offset int64) (int, error) {
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if offset >= int64(len(l)) {
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return 0, io.EOF
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}
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n := copy(ls, l[offset:])
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if n < len(ls) {
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return n, io.EOF
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}
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return n, nil
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}
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// filerFileWriter buffers writes and flushes on Close.
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type filerFileWriter struct {
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fs SftpServer
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req *sftp.Request
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mu sync.Mutex
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data []byte
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permissions os.FileMode
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uid uint32
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gid uint32
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offset int64
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}
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func (w *filerFileWriter) Write(p []byte) (int, error) {
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w.mu.Lock()
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defer w.mu.Unlock()
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end := w.offset + int64(len(p))
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if end > int64(len(w.data)) {
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newBuf := make([]byte, end)
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copy(newBuf, w.data)
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w.data = newBuf
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}
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n := copy(w.data[w.offset:], p)
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w.offset += int64(n)
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return n, nil
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}
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func (w *filerFileWriter) WriteAt(p []byte, off int64) (int, error) {
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w.mu.Lock()
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defer w.mu.Unlock()
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end := int(off) + len(p)
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if end > len(w.data) {
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newBuf := make([]byte, end)
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copy(newBuf, w.data)
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w.data = newBuf
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}
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n := copy(w.data[off:], p)
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return n, nil
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}
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func (w *filerFileWriter) Close() error {
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w.mu.Lock()
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defer w.mu.Unlock()
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dir, _ := util.FullPath(w.req.Filepath).DirAndName()
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// Check permissions based on file metadata and user permissions
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if err := w.fs.checkFilePermission(dir, "write"); err != nil {
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glog.Errorf("Permission denied for %s", dir)
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return err
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}
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// Call the extracted putFile method on SftpServer
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return w.fs.putFile(w.req.Filepath, w.data, w.fs.user)
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}
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