Fix issues with dupliacte names; other minor bug fixes

pkg/webdav/file.go

@@ -71,7 +71,7 @@ func (f *File) getDownloadLink() (string, error) {
 		f.downloadLink = downloadLink
 		return downloadLink, nil
 	}
-	return "", fmt.Errorf("download link not found")
+	return "", os.ErrNotExist
 }
 
 func (f *File) stream() (*http.Response, error) {
@@ -203,7 +203,7 @@ func (f *File) Read(p []byte) (n int, err error) {
 		// Make the request to get the file
 		resp, err := f.stream()
 		if err != nil {
-			return 0, err
+			return 0, io.EOF
 		}
 		if resp == nil {
 			return 0, io.EOF
@@ -216,10 +216,7 @@ func (f *File) Read(p []byte) (n int, err error) {
 	n, err = f.reader.Read(p)
 	f.offset += int64(n)
 
-	if err == io.EOF {
-		f.reader.Close()
-		f.reader = nil
-	} else if err != nil {
+	if err != nil {
 		f.reader.Close()
 		f.reader = nil
 	}

pkg/webdav/handler.go

@@ -361,6 +361,27 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if r.Method == "HEAD" {
+		f, err := h.OpenFile(r.Context(), r.URL.Path, os.O_RDONLY, 0)
+		if err != nil {
+			h.logger.Error().Err(err).Str("path", r.URL.Path).Msg("Failed to open file")
+			http.NotFound(w, r)
+			return
+		}
+		defer f.Close()
+
+		fi, err := f.Stat()
+		if err != nil {
+			h.logger.Error().Err(err).Msg("Failed to stat file")
+			http.Error(w, "Server Error", http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", getContentType(fi.Name()))
+		w.Header().Set("Content-Length", fmt.Sprintf("%d", fi.Size()))
+		w.WriteHeader(http.StatusOK)
+		return
+	}
+
 	// Fallback: for other methods, use the standard WebDAV handler.
 	handler := &webdav.Handler{
 		FileSystem: h,