PM-2149 Added cancellation support to upload attachment, which also includes adding cancellation to SendAsync in the ApiService

src/Android/Services/DeviceActionService.cs

@@ -83,7 +83,7 @@ namespace Bit.Droid.Services
             return launchIntentSender != null;
         }
 
-        public async Task ShowLoadingAsync(string text)
+        public async Task ShowLoadingAsync(string text, System.Threading.CancellationTokenSource cts = null, string cancelButtonText = null)
         {
             if (_progressDialog != null)
             {
@@ -98,10 +98,16 @@ namespace Bit.Droid.Services
             txtLoading.Text = text;
             txtLoading.SetTextColor(ThemeHelpers.TextColor);
 
-            _progressDialog = new AlertDialog.Builder(activity)
+            var progressDialogBuilder = new AlertDialog.Builder(activity)
                 .SetView(dialogView)
-                .SetCancelable(false)
-                .Create();
+                .SetCancelable(cts != null);
+
+            if (cts != null)
+            {
+                progressDialogBuilder.SetNegativeButton(cancelButtonText ?? AppResources.Cancel, (sender, args) => cts?.Cancel());
+            }
+
+            _progressDialog = progressDialogBuilder.Create();
             _progressDialog.Show();
         }
 

src/App/Abstractions/IDeviceActionService.cs

@@ -1,4 +1,5 @@
-using System.Threading.Tasks;
+using System.Threading;
+using System.Threading.Tasks;
 using Bit.Core.Enums;
 using Bit.Core.Models;
 
@@ -13,7 +14,7 @@ namespace Bit.App.Abstractions
         string GetBuildNumber();
 
         void Toast(string text, bool longDuration = false);
-        Task ShowLoadingAsync(string text);
+        Task ShowLoadingAsync(string text, CancellationTokenSource cts = null, string cancelButtonText = null);
         Task HideLoadingAsync();
         Task<string> DisplayPromptAync(string title = null, string description = null, string text = null,
             string okButtonText = null, string cancelButtonText = null, bool numericKeyboard = false,

src/App/Pages/Vault/AttachmentsPageViewModel.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Windows.Input;
 using Bit.App.Abstractions;
@@ -31,6 +32,7 @@ namespace Bit.App.Pages
         private bool _hasUpdatedKey;
         private bool _canAccessAttachments;
         private string _fileName;
+        private CancellationTokenSource _uploadCts;
 
         public AttachmentsPageViewModel()
         {
@@ -119,11 +121,15 @@ namespace Bit.App.Pages
                     AppResources.AnErrorHasOccurred);
                 return false;
             }
+
+            _uploadCts = new CancellationTokenSource();
+            var uploadCts = _uploadCts;
+
             try
             {
-                await _deviceActionService.ShowLoadingAsync(AppResources.Saving);
+                await _deviceActionService.ShowLoadingAsync(AppResources.Saving, uploadCts);
                 _cipherDomain = await _cipherService.SaveAttachmentRawWithServerAsync(
-                    _cipherDomain, FileName, FileData);
+                    _cipherDomain, FileName, FileData, uploadCts.Token);
                 Cipher = await _cipherDomain.DecryptAsync();
                 await _deviceActionService.HideLoadingAsync();
                 _platformUtilsService.ShowToast("success", null, AppResources.AttachementAdded);
@@ -132,6 +138,11 @@ namespace Bit.App.Pages
                 FileName = null;
                 return true;
             }
+            catch (OperationCanceledException)
+            {
+                await _deviceActionService.HideLoadingAsync();
+                await _platformUtilsService.ShowDialogAsync(AppResources.UploadHasBeenCanceled, AppResources.Attachments);
+            }
             catch (ApiException e)
             {
                 _logger.Exception(e);

src/App/Resources/AppResources.Designer.cs

@@ -202,6 +202,24 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Biometric unlock for this account is disabled pending verification of master password..
+        /// </summary>
+        public static string AccountBiometricInvalidated {
+            get {
+                return ResourceManager.GetString("AccountBiometricInvalidated", resourceCulture);
+            }
+        }
+        
+        /// <summary>
+        ///   Looks up a localized string similar to Autofill biometric unlock for this account is disabled pending verification of master password..
+        /// </summary>
+        public static string AccountBiometricInvalidatedExtension {
+            get {
+                return ResourceManager.GetString("AccountBiometricInvalidatedExtension", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Your new account has been created! You may now log in..
         /// </summary>
@@ -967,24 +985,6 @@ namespace Bit.App.Resources {
             }
         }
         
-        /// <summary>
-        ///   Looks up a localized string similar to Biometric unlock disabled pending verification of master password..
-        /// </summary>
-        public static string AccountBiometricInvalidated {
-            get {
-                return ResourceManager.GetString("AccountBiometricInvalidated", resourceCulture);
-            }
-        }
-        
-        /// <summary>
-        ///   Looks up a localized string similar to Biometric unlock for autofill disabled pending verification of master password..
-        /// </summary>
-        public static string AccountBiometricInvalidatedExtension {
-            get {
-                return ResourceManager.GetString("AccountBiometricInvalidatedExtension", resourceCulture);
-            }
-        }
-        
         /// <summary>
         ///   Looks up a localized string similar to Biometrics.
         /// </summary>
@@ -6515,6 +6515,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Upload has been canceled.
+        /// </summary>
+        public static string UploadHasBeenCanceled {
+            get {
+                return ResourceManager.GetString("UploadHasBeenCanceled", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Uppercase (A to Z).
         /// </summary>

src/App/Resources/AppResources.resx

@@ -2631,4 +2631,7 @@ Do you want to switch to this account?</value>
   <data name="CurrentMasterPassword" xml:space="preserve">
     <value>Current master password</value>
   </data>
+  <data name="UploadHasBeenCanceled" xml:space="preserve">
+    <value>Upload has been canceled</value>
+  </data>
 </root>

src/Core/Services/ApiService.cs

@@ -699,6 +699,14 @@ namespace Bit.Core.Services
                 {
                     response = await _httpClient.SendAsync(requestMessage, cancellationToken);
                 }
+                catch (OperationCanceledException)
+                {
+                    throw;
+                }
+                catch (Exception ex) when (ex.Message?.Contains("Socket closed") == true)
+                {
+                    throw new OperationCanceledException();
+                }
                 catch (Exception e)
                 {
                     throw new ApiException(HandleWebError(e));

src/iOS.Core/Services/DeviceActionService.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using Bit.App.Abstractions;
 using Bit.App.Resources;
@@ -61,7 +62,7 @@ namespace Bit.iOS.Core.Services
             };
         }
 
-        public Task ShowLoadingAsync(string text)
+        public Task ShowLoadingAsync(string text, CancellationTokenSource cts = null, string cancelButtonText = null)
         {
             if (_progressAlert != null)
             {
@@ -84,6 +85,14 @@ namespace Bit.iOS.Core.Services
             _progressAlert = UIAlertController.Create(null, text, UIAlertControllerStyle.Alert);
             _progressAlert.View.TintColor = UIColor.Black;
             _progressAlert.View.Add(loadingIndicator);
+            if (cts != null)
+            {
+                _progressAlert.AddAction(UIAlertAction.Create(cancelButtonText ?? AppResources.Cancel, UIAlertActionStyle.Cancel, x =>
+                {
+                    cts.Cancel();
+                    result.TrySetResult(0);
+                }));
+            }
 
             vc.PresentViewController(_progressAlert, false, () => result.TrySetResult(0));
             return result.Task;