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

b0esche_cloud/lib/pages/public_file_viewer.dart

@@ -1,9 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
-import 'package:http/http.dart' as http;
-import 'dart:js_interop';
 import 'package:web/web.dart' as web;
-import 'dart:typed_data';
 import '../theme/app_theme.dart';
 import '../services/api_client.dart';
 import '../injection.dart';
@@ -47,27 +44,11 @@ class _PublicFileViewerState extends State<PublicFileViewer> {
 
   void _downloadFile() {
     if (_fileData != null && _fileData!['downloadUrl'] != null) {
-      // Use http package to download
+      // Trigger download directly in browser
-      http.get(Uri.parse(_fileData!['downloadUrl'])).then((response) {
-        if (response.statusCode == 200) {
-          // Trigger download in web
-          final uint8List = Uint8List.fromList(response.bodyBytes);
-          final jsUint8Array = JSUint8Array(
-            uint8List.buffer.toJS,
-            uint8List.offsetInBytes,
-            uint8List.length,
-          );
-          final jsArray = JSArray<JSAny>.withLength(1);
-          jsArray[0] = jsUint8Array;
-          final blob = web.Blob(jsArray);
-          final url = web.URL.createObjectURL(blob);
       final anchor = web.HTMLAnchorElement()
-            ..href = url
+        ..href = _fileData!['downloadUrl']
         ..download = _fileData!['fileName'] ?? 'download';
       anchor.click();
-          web.URL.revokeObjectURL(url);
-        }
-      });
     }
   }
 

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
+	if file.UserID == nil {
-	client, err := getUserWebDAVClient(r.Context(), db, uuid.Nil, "https://of.b0esche.cloud", cfg.NextcloudUser, cfg.NextcloudPass)
+		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)
 }