Fix document viewer: add dynamic base URL and debug logging for file downloads

b0esche_cloud/lib/pages/document_viewer.dart

@@ -169,9 +169,16 @@ class _DocumentViewerModalState extends State<DocumentViewerModal> {
                 }
                 if (state is DocumentViewerReady) {
                   if (state.caps.isPdf) {
+                    // Log the URL being used for debugging
+                    print('Loading PDF from: ${state.viewUrl}');
+                    print('Using token: ${state.token.substring(0, 20)}...');
                     return SfPdfViewer.network(
                       state.viewUrl.toString(),
                       headers: {'Authorization': 'Bearer ${state.token}'},
+                      onDocumentLoadFailed: (details) {
+                        print('PDF load failed: ${details.error}');
+                        print('Description: ${details.description}');
+                      },
                     );
                   } else {
                     return Container(

go_cloud/internal/http/routes.go

@@ -365,8 +365,16 @@ func viewerHandler(w http.ResponseWriter, r *http.Request, db *database.DB, audi
 	// Log activity
 	db.LogActivity(r.Context(), userID, orgID, &fileId, "view_file", map[string]interface{}{})
 
-	// Build download URL with proper URL encoding
+	// Build download URL with proper URL encoding using the request's scheme and host
-	downloadPath := fmt.Sprintf("https://go.b0esche.cloud/orgs/%s/files/download?path=%s", orgID.String(), url.QueryEscape(file.Path))
+	scheme := "https"
+	if r.TLS == nil {
+		scheme = "http"
+	}
+	host := r.Host
+	if host == "" {
+		host = "go.b0esche.cloud"
+	}
+	downloadPath := fmt.Sprintf("%s://%s/orgs/%s/files/download?path=%s", scheme, host, orgID.String(), url.QueryEscape(file.Path))
 
 	// Determine if it's a PDF based on file extension
 	isPdf := strings.HasSuffix(strings.ToLower(file.Name), ".pdf")
@@ -421,8 +429,16 @@ func userViewerHandler(w http.ResponseWriter, r *http.Request, db *database.DB,
 	// Optionally log activity without org id
 	db.LogActivity(r.Context(), userID, uuid.Nil, &fileId, "view_user_file", map[string]interface{}{})
 
-	// Build download URL with proper URL encoding
+	// Build download URL with proper URL encoding using the request's scheme and host
-	downloadPath := fmt.Sprintf("https://go.b0esche.cloud/user/files/download?path=%s", url.QueryEscape(file.Path))
+	scheme := "https"
+	if r.TLS == nil {
+		scheme = "http"
+	}
+	host := r.Host
+	if host == "" {
+		host = "go.b0esche.cloud"
+	}
+	downloadPath := fmt.Sprintf("%s://%s/user/files/download?path=%s", scheme, host, url.QueryEscape(file.Path))
 
 	// Determine if it's a PDF based on file extension
 	isPdf := strings.HasSuffix(strings.ToLower(file.Name), ".pdf")
@@ -1455,11 +1471,15 @@ func downloadUserFileHandler(w http.ResponseWriter, r *http.Request, db *databas
 		return
 	}
 
+	// Log the requested file path for debugging
+	fmt.Printf("[DEBUG] Download request - User: %s, Path: %s\n", userID.String(), filePath)
+
 	// Try to download from Nextcloud first
 	if storageClient != nil {
 		rel := strings.TrimPrefix(filePath, "/")
 		// Keep remote user workspace path consistent with uploads: "/users/<userID>/<rel>"
 		remotePath := path.Join("/users", userID.String(), rel)
+		fmt.Printf("[DEBUG] Trying WebDAV path: %s\n", remotePath)
 
 		reader, size, err := storageClient.Download(r.Context(), remotePath)
 		if err == nil {
@@ -1494,6 +1514,7 @@ func downloadUserFileHandler(w http.ResponseWriter, r *http.Request, db *databas
 	baseDir := filepath.Clean(filepath.Join("/tmp/uploads/users", userID.String()))
 	rel := strings.TrimPrefix(filePath, "/")
 	localPath := filepath.Join(baseDir, rel)
+	fmt.Printf("[DEBUG] Trying local path: %s\n", localPath)
 	// Prevent path traversal escaping the baseDir
 	if !strings.HasPrefix(localPath, baseDir+string(os.PathSeparator)) && localPath != baseDir {
 		errors.WriteError(w, errors.CodeInvalidArgument, "Invalid path", http.StatusBadRequest)