SEBWIN-569: Added message when down- and uploading is not allowed.

SafeExamBrowser.Browser/BrowserControl.cs

@@ -78,6 +78,7 @@ namespace SafeExamBrowser.Browser
 			control.AuthCredentialsRequired += (w, b, o, i, h, p, r, s, c, a) => a.Value = requestHandler.GetAuthCredentials(w, b, o, i, h, p, r, s, c);
 			control.BeforeBrowse += (w, b, f, r, u, i, a) => a.Value = requestHandler.OnBeforeBrowse(w, b, f, r, u, i);
 			control.BeforeDownload += (w, b, d, c) => downloadHandler.OnBeforeDownload(w, b, d, c);
+			control.CanDownload += (w, b, u, r, a) => a.Value = downloadHandler.CanDownload(w, b, u, r);
 			control.DownloadUpdated += (w, b, d, c) => downloadHandler.OnDownloadUpdated(w, b, d, c);
 			control.FaviconUrlChanged += (w, b, u) => displayHandler.OnFaviconUrlChange(w, b, u);
 			control.FileDialogRequested += (w, b, m, f, t, d, a, s, c) => dialogHandler.OnFileDialog(w, b, m, f, t, d, a, s, c);

SafeExamBrowser.Browser/BrowserWindow.cs

@@ -156,6 +156,7 @@ namespace SafeExamBrowser.Browser
 			displayHandler.FaviconChanged += DisplayHandler_FaviconChanged;
 			displayHandler.ProgressChanged += DisplayHandler_ProgressChanged;
 			downloadHandler.ConfigurationDownloadRequested += DownloadHandler_ConfigurationDownloadRequested;
+			downloadHandler.DownloadAborted += DownloadHandler_DownloadAborted;
 			downloadHandler.DownloadUpdated += DownloadHandler_DownloadUpdated;
 			keyboardHandler.FindRequested += KeyboardHandler_FindRequested;
 			keyboardHandler.HomeNavigationRequested += HomeNavigationRequested;
@@ -352,6 +353,7 @@ namespace SafeExamBrowser.Browser
 			else
 			{
 				logger.Info($"Blocked file system dialog to {args.Operation}->{args.Element}, as {(isDownload ? "downloading" : "uploading")} is not allowed.");
+				ShowDownUploadNotAllowedMessage(isDownload);
 			}
 		}
 
@@ -401,6 +403,11 @@ namespace SafeExamBrowser.Browser
 			}
 		}
 
+		private void DownloadHandler_DownloadAborted()
+		{
+			ShowDownUploadNotAllowedMessage();
+		}
+
 		private void DownloadHandler_DownloadUpdated(DownloadItemState state)
 		{
 			window.UpdateDownloadState(state);
@@ -610,6 +617,14 @@ namespace SafeExamBrowser.Browser
 			}
 		}
 
+		private void ShowDownUploadNotAllowedMessage(bool isDownload = true)
+		{
+			var message = isDownload ? TextKey.MessageBox_DownloadNotAllowed : TextKey.MessageBox_UploadNotAllowed;
+			var title = isDownload ? TextKey.MessageBox_DownloadNotAllowedTitle : TextKey.MessageBox_UploadNotAllowedTitle;
+
+			messageBox.Show(message, title, icon: MessageBoxIcon.Warning, parent: window);
+		}
+
 		private void Window_AddressChanged(string address)
 		{
 			var isValid = Uri.TryCreate(address, UriKind.Absolute, out _) || Uri.TryCreate($"https://{address}", UriKind.Absolute, out _);
@@ -704,7 +719,7 @@ namespace SafeExamBrowser.Browser
 
 		private void TabPressed(bool shiftPressed)
 		{
-			this.Control.ExecuteJavascript("document.activeElement.tagName", result =>
+			Control.ExecuteJavascript("document.activeElement.tagName", result =>
 			{
 				var tagName = result.Result as string;
 				if (tagName != null)
@@ -718,7 +733,7 @@ namespace SafeExamBrowser.Browser
 						}
 						else
 						{
-							this.LoseFocusRequested?.Invoke(true);
+							LoseFocusRequested?.Invoke(true);
 						}
 					}
 				}
@@ -734,8 +749,7 @@ namespace SafeExamBrowser.Browser
 			else
 			{
 				window.FocusBrowser();
-
+				Activate();
-				this.Activate();
 			}
 		}
 

SafeExamBrowser.Browser/Events/DownloadAbortedEventHandler.cs

@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2022 ETH Zürich, Educational Development and Technology (LET)
+ * 
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+namespace SafeExamBrowser.Browser.Events
+{
+	internal delegate void DownloadAbortedEventHandler();
+}

SafeExamBrowser.Browser/Handlers/DownloadHandler.cs

@@ -32,6 +32,7 @@ namespace SafeExamBrowser.Browser.Handlers
 		private readonly WindowSettings windowSettings;
 
 		internal event DownloadRequestedEventHandler ConfigurationDownloadRequested;
+		internal event DownloadAbortedEventHandler DownloadAborted;
 		internal event DownloadUpdatedEventHandler DownloadUpdated;
 
 		internal DownloadHandler(AppConfig appConfig, ILogger logger, BrowserSettings settings, WindowSettings windowSettings)
@@ -73,6 +74,7 @@ namespace SafeExamBrowser.Browser.Handlers
 			else
 			{
 				logger.Info($"Aborted download request{(windowSettings.UrlPolicy.CanLog() ? $" for '{uri}'" : "")}, as downloading is not allowed.");
+				Task.Run(() => DownloadAborted?.Invoke());
 			}
 		}
 

SafeExamBrowser.Browser/SafeExamBrowser.Browser.csproj

@@ -82,6 +82,7 @@
     <Compile Include="BrowserWindow.cs" />
     <Compile Include="Events\DialogRequestedEventArgs.cs" />
     <Compile Include="Events\DialogRequestedEventHandler.cs" />
+    <Compile Include="Events\DownloadAbortedEventHandler.cs" />
     <Compile Include="Events\DownloadUpdatedEventHandler.cs" />
     <Compile Include="Events\FaviconChangedEventHandler.cs" />
     <Compile Include="Events\WindowClosedEventHandler.cs" />

SafeExamBrowser.I18n.Contracts/TextKey.cs

@@ -94,6 +94,12 @@ namespace SafeExamBrowser.I18n.Contracts
 		MessageBox_ClientConfigurationQuestionTitle,
 		MessageBox_ConfigurationDownloadError,
 		MessageBox_ConfigurationDownloadErrorTitle,
+		MessageBox_DisplayConfigurationError,
+		MessageBox_DisplayConfigurationErrorTitle,
+		MessageBox_DisplayConfigurationInternal,
+		MessageBox_DisplayConfigurationInternalOrExternal,
+		MessageBox_DownloadNotAllowed,
+		MessageBox_DownloadNotAllowedTitle,
 		MessageBox_InvalidConfigurationData,
 		MessageBox_InvalidConfigurationDataTitle,
 		MessageBox_InvalidHomePassword,
@@ -105,10 +111,6 @@ namespace SafeExamBrowser.I18n.Contracts
 		MessageBox_InvalidUnlockPassword,
 		MessageBox_InvalidUnlockPasswordTitle,
 		MessageBox_NoButton,
-		MessageBox_DisplayConfigurationError,
-		MessageBox_DisplayConfigurationErrorTitle,
-		MessageBox_DisplayConfigurationInternal,
-		MessageBox_DisplayConfigurationInternalOrExternal,
 		MessageBox_NotSupportedConfigurationResource,
 		MessageBox_NotSupportedConfigurationResourceTitle,
 		MessageBox_OkButton,
@@ -140,6 +142,8 @@ namespace SafeExamBrowser.I18n.Contracts
 		MessageBox_StartupErrorTitle,
 		MessageBox_UnexpectedConfigurationError,
 		MessageBox_UnexpectedConfigurationErrorTitle,
+		MessageBox_UploadNotAllowed,
+		MessageBox_UploadNotAllowedTitle,
 		MessageBox_VirtualMachineNotAllowed,
 		MessageBox_VirtualMachineNotAllowedTitle,
 		MessageBox_YesButton,

SafeExamBrowser.I18n/Data/de.xml

@@ -252,6 +252,12 @@
     <Entry key="MessageBox_DisplayConfigurationInternalOrExternal">
         interne(r) oder externe(r)
     </Entry>
+    <Entry key="MessageBox_DownloadNotAllowed">
+        Das Herunterladen von Dateien ist in den aktuellen SEB-Einstellungen nicht erlaubt. Bitte melden Sie dies Ihrem Prüfungsanbieter.
+    </Entry>
+    <Entry key="MessageBox_DownloadNotAllowedTitle">
+        Herunterladen nicht erlaubt!
+    </Entry>
     <Entry key="MessageBox_InvalidConfigurationData">
         Die Konfigurations-Ressource "%%URI%%" enthält ungültige Daten!
     </Entry>
@@ -378,6 +384,12 @@
     <Entry key="MessageBox_UnexpectedConfigurationErrorTitle">
         Konfigurations-Fehler
     </Entry>
+    <Entry key="MessageBox_UploadNotAllowed">
+        Das Hochladen von Dateien ist in den aktuellen SEB-Einstellungen nicht erlaubt. Bitte melden Sie dies Ihrem Prüfungsanbieter.
+    </Entry>
+    <Entry key="MessageBox_UploadNotAllowedTitle">
+        Hochladen nicht erlaubt!
+    </Entry>
     <Entry key="MessageBox_VirtualMachineNotAllowed">
         Dieser Computer scheint eine virtuelle Maschine zu sein. Die ausgewählte Konfiguration erlaubt es nicht, SEB in einer virtuellen Maschine auszuführen.
     </Entry>

SafeExamBrowser.I18n/Data/en.xml

@@ -252,6 +252,12 @@
     <Entry key="MessageBox_DisplayConfigurationInternalOrExternal">
         internal or external
     </Entry>
+    <Entry key="MessageBox_DownloadNotAllowed">
+        Downloading files is not allowed in the current SEB settings. Please report this to your exam provider.
+    </Entry>
+    <Entry key="MessageBox_DownloadNotAllowedTitle">
+        Downloading Not Allowed!
+    </Entry>
     <Entry key="MessageBox_InvalidConfigurationData">
         The configuration resource "%%URI%%" contains invalid data!
     </Entry>
@@ -378,6 +384,12 @@
     <Entry key="MessageBox_UnexpectedConfigurationErrorTitle">
         Configuration Error
     </Entry>
+    <Entry key="MessageBox_UploadNotAllowed">
+        Uploading files is not allowed in the current SEB settings. Please report this to your exam provider.
+    </Entry>
+    <Entry key="MessageBox_UploadNotAllowedTitle">
+        Uploading Not Allowed!
+    </Entry>
     <Entry key="MessageBox_VirtualMachineNotAllowed">
         This computer appears to be a virtual machine. The selected configuration does not allow SEB to be run in a virtual machine.
     </Entry>

SafeExamBrowser.I18n/Data/fr.xml

@@ -252,6 +252,12 @@
     <Entry key="MessageBox_DisplayConfigurationInternalOrExternal">
         interne(s) ou externe(s)
     </Entry>
+    <Entry key="MessageBox_DownloadNotAllowed">
+        Le téléchargement de fichiers n'est pas autorisé dans les paramètres SEB actuels. Veuillez le signaler à votre fournisseur d'examen.
+    </Entry>
+    <Entry key="MessageBox_DownloadNotAllowedTitle">
+        Téléchargement non autorisé!
+    </Entry>
     <Entry key="MessageBox_InvalidConfigurationData">
         La ressource de configuration "%%URI%%" contient des données non valides!
     </Entry>
@@ -378,6 +384,12 @@
     <Entry key="MessageBox_UnexpectedConfigurationErrorTitle">
         Erreur de configuration
     </Entry>
+    <Entry key="MessageBox_UploadNotAllowed">
+        Le téléchargement de fichiers n'est pas autorisé dans les paramètres SEB actuels. Veuillez le signaler à votre fournisseur d'examen.
+    </Entry>
+    <Entry key="MessageBox_UploadNotAllowedTitle">
+        Téléchargement non autorisé!
+    </Entry>
     <Entry key="MessageBox_VirtualMachineNotAllowed">
         Cet ordinateur semble être une machine virtuelle. La configuration sélectionnée ne permet pas à SEB de fonctionner dans une machine virtuelle.
     </Entry>

SafeExamBrowser.I18n/Data/it.xml

@@ -252,6 +252,12 @@
     <Entry key="MessageBox_DisplayConfigurationInternalOrExternal">
         interno/i o esterno/i
     </Entry>
+    <Entry key="MessageBox_DownloadNotAllowed">
+        Il download di file non è consentito nelle impostazioni SEB correnti. Si prega di segnalarlo al fornitore dell'esame.
+    </Entry>
+    <Entry key="MessageBox_DownloadNotAllowedTitle">
+        Download non consentito!
+    </Entry>
     <Entry key="MessageBox_InvalidConfigurationData">
         La risorsa di configurazione "%%URI%%" contiene dati non validi!
     </Entry>
@@ -378,6 +384,12 @@
     <Entry key="MessageBox_UnexpectedConfigurationErrorTitle">
         Errore di configurazione
     </Entry>
+    <Entry key="MessageBox_UploadNotAllowed">
+        Il upload di file non è consentito nelle impostazioni SEB correnti. Si prega di segnalarlo al fornitore dell'esame.
+    </Entry>
+    <Entry key="MessageBox_UploadNotAllowedTitle">
+        Upload non consentito!
+    </Entry>
     <Entry key="MessageBox_VirtualMachineNotAllowed">
         Questo computer sembra essere una macchina virtuale. La configurazione selezionata non consente l'esecuzione di SEB in una macchina virtuale.
     </Entry>

SafeExamBrowser.I18n/Data/zh.xml

@@ -222,6 +222,12 @@
     <Entry key="MessageBox_DisplayConfigurationInternalOrExternal">
         内部或外部
     </Entry>
+    <Entry key="MessageBox_DownloadNotAllowed">
+        当前 SEB 设置中不允许下载文件。 请将此情况报告给您的考试提供商。
+    </Entry>
+    <Entry key="MessageBox_DownloadNotAllowedTitle">
+        不允许下载！
+    </Entry>
     <Entry key="MessageBox_InvalidConfigurationData">
         配置"%%URI%%" 中包含无效数据。
     </Entry>
@@ -342,6 +348,12 @@
     <Entry key="MessageBox_UnexpectedConfigurationErrorTitle">
         配置错误
     </Entry>
+    <Entry key="MessageBox_UploadNotAllowed">
+        当前 SEB 设置中不允许上传文件。 请将此情况报告给您的考试提供商。
+    </Entry>
+    <Entry key="MessageBox_UploadNotAllowedTitle">
+        不允许上传！
+    </Entry>
     <Entry key="MessageBox_VirtualMachineNotAllowed">
         这台电脑是一个虚拟机。所选配置不允许防作弊考试专用浏览器在虚拟机中运行。
     </Entry>