Refactor file download handling to simplify browser download process and ensure proper content disposition for file downloads

go_cloud/internal/http/routes.go

@@ -2979,8 +2979,13 @@ func publicFileDownloadHandler(w http.ResponseWriter, r *http.Request, db *datab
 		return
 	}
 
-	// Get WebDAV client for org
-	client, err := getUserWebDAVClient(r.Context(), db, uuid.Nil, "https://of.b0esche.cloud", cfg.NextcloudUser, cfg.NextcloudPass)
+	if file.UserID == nil {
+		errors.WriteError(w, errors.CodeNotFound, "File not accessible", http.StatusNotFound)
+		return
+	}
+
+	// Get WebDAV client for the file's owner
+	client, err := getUserWebDAVClient(r.Context(), db, *file.UserID, cfg.NextcloudURL, cfg.NextcloudUser, cfg.NextcloudPass)
 	if err != nil {
 		errors.LogError(r, err, "Failed to get WebDAV client")
 		errors.WriteError(w, errors.CodeInternal, "Server error", http.StatusInternalServerError)
@@ -3001,6 +3006,9 @@ func publicFileDownloadHandler(w http.ResponseWriter, r *http.Request, db *datab
 		w.Header()[k] = v
 	}
 
+	// Ensure download behavior
+	w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", file.Name))
+
 	// Copy body
 	io.Copy(w, resp.Body)
 }