public async Task SaveChangesWithMergeAsync(InboxEntity inboxEntity)
{
const int MaxRetries = 5;
Exception lastError = null;
for (int i = 0; i < MaxRetries; i++)
{
try
{
if (i > 0)
{
// Attempt to sync up our inboxEntity with the cloud before saving local changes again.
// We can drop the result. Just requerying is enough to solve the problem.
await this.Get(inboxEntity.RowKey).ExecuteSegmentedAsync(null);
}
await this.SaveChangesAsync();
return;
}
catch (DataServiceRequestException ex)
{
lastError = ex;
}
}
// Rethrow exception. We've failed too many times.
ExceptionDispatchInfo.Capture(lastError).Throw();
}
public async Task SaveChangesWithMergeAsync(InboxEntity inboxEntity)
{
const int MaxRetries = 5;
Exception lastError = null;
for (int i = 0; i < MaxRetries; i++)
{
try {
if (i > 0)
{
// Attempt to sync up our inboxEntity with the cloud before saving local changes again.
// We can drop the result. Just requerying is enough to solve the problem.
await this.Get(inboxEntity.RowKey).ExecuteSegmentedAsync(null);
}
await this.SaveChangesAsync();
return;
} catch (DataServiceRequestException ex) {
lastError = ex;
}
}
// Rethrow exception. We've failed too many times.
ExceptionDispatchInfo.Capture(lastError).Throw();
}
public static InboxEntity Create() {
var entity = new InboxEntity();
var rng = RNGCryptoServiceProvider.Create();
var inboxOwnerCode = new byte[CodeLength];
rng.GetBytes(inboxOwnerCode);
entity.InboxOwnerCode = Utilities.ToBase64WebSafe(inboxOwnerCode);
entity.RowKey = Guid.NewGuid().ToString();
return entity;
}
public static InboxEntity Create()
{
var entity = new InboxEntity();
var rng = RNGCryptoServiceProvider.Create();
var inboxOwnerCode = new byte[CodeLength];
rng.GetBytes(inboxOwnerCode);
entity.InboxOwnerCode = Utilities.ToBase64WebSafe(inboxOwnerCode);
entity.RowKey = Guid.NewGuid().ToString();
return(entity);
}
public void AddObject(InboxEntity entity)
{
this.AddObject(this.TableName, entity);
}
private async Task AlertLongPollWaiterAsync(InboxEntity inbox)
{
Requires.NotNull(inbox, "inbox");
await this.PushNotifyInboxMessageAsync(inbox);
var id = inbox.RowKey;
TaskCompletionSource<object> tcs;
lock (LongPollWaiters)
{
if (LongPollWaiters.TryGetValue(id, out tcs))
{
LongPollWaiters.Remove(id);
}
}
if (tcs != null)
{
tcs.TrySetResult(null);
}
}
public void AddObject(InboxEntity entity)
{
this.AddObject(this.TableName, entity);
}
private async Task PushNotifyInboxMessageAppleAsync(InboxEntity inbox)
{
if (MvcApplication.IsApplePushRegistered)
{
if (!string.IsNullOrEmpty(inbox.ApplePushNotificationGatewayDeviceToken))
{
int count = await this.RetrieveInboxItemsCountAsync(inbox.RowKey);
MvcApplication.PushBroker.QueueNotification(new AppleNotification()
.ForDeviceToken(inbox.ApplePushNotificationGatewayDeviceToken)
.WithBadge(count));
}
}
}
private async Task PushNotifyInboxMessageGoogleAsync(InboxEntity inbox)
{
if (!string.IsNullOrEmpty(inbox.GoogleCloudMessagingRegistrationId))
{
var notifications = new GooglePushNotifications(this.HttpClient, ConfigurationManager.AppSettings["GoogleApiKey"], inbox.GoogleCloudMessagingRegistrationId);
bool invalidChannel = false;
try
{
bool successfulPush = await notifications.PushGoogleRawNotificationAsync(CancellationToken.None);
invalidChannel |= !successfulPush;
}
catch (HttpRequestException)
{
invalidChannel = true;
}
if (invalidChannel)
{
inbox.GoogleCloudMessagingRegistrationId = null;
this.InboxTable.UpdateObject(inbox);
}
}
}
private async Task PushNotifyInboxMessageWinPhoneAsync(InboxEntity inbox)
{
if (!string.IsNullOrEmpty(inbox.WinPhone8PushChannelUri))
{
var notifications = new WinPhonePushNotifications(this.HttpClient, new Uri(inbox.WinPhone8PushChannelUri));
int count = await this.RetrieveInboxItemsCountAsync(inbox.RowKey);
bool invalidChannel = false;
try
{
var pushTile = notifications.PushWinPhoneTileAsync(inbox.WinPhone8TileTemplate, count: count);
Task<bool> pushToast = Task.FromResult(false);
if (!string.IsNullOrEmpty(inbox.WinPhone8ToastText1) || !string.IsNullOrEmpty(inbox.WinPhone8ToastText2))
{
var line1 = string.Format(CultureInfo.InvariantCulture, inbox.WinPhone8ToastText1 ?? string.Empty, count);
var line2 = string.Format(CultureInfo.InvariantCulture, inbox.WinPhone8ToastText2 ?? string.Empty, count);
if (inbox.LastWinPhone8PushNotificationUtc.HasValue && inbox.LastAuthenticatedInteractionUtc.HasValue && inbox.LastWinPhone8PushNotificationUtc.Value > inbox.LastAuthenticatedInteractionUtc.Value)
{
// We've sent a toast notification more recently than the user has checked messages,
// so there's no reason to send another for now.
pushToast = Task.FromResult(true);
}
else
{
pushToast = notifications.PushWinPhoneToastAsync(line1, line2);
}
}
Task<bool> pushRaw = Task.FromResult(false);
if (!string.IsNullOrEmpty(inbox.WinPhone8PushChannelContent))
{
pushRaw = notifications.PushWinPhoneRawNotificationAsync(inbox.WinPhone8PushChannelContent);
}
await Task.WhenAll(pushTile, pushToast, pushRaw);
invalidChannel |= !(pushTile.Result || pushToast.Result || pushRaw.Result);
}
catch (HttpRequestException)
{
invalidChannel = true;
}
if (invalidChannel)
{
inbox.WinPhone8PushChannelUri = null;
inbox.WinPhone8PushChannelContent = null;
inbox.WinPhone8ToastText1 = null;
inbox.WinPhone8ToastText2 = null;
}
else
{
inbox.LastWinPhone8PushNotificationUtc = DateTime.UtcNow;
}
this.InboxTable.UpdateObject(inbox);
}
}
private async Task PushNotifyInboxMessageWinStoreAsync(InboxEntity inbox, int failedAttempts = 0)
{
if (string.IsNullOrEmpty(inbox.ClientPackageSecurityIdentifier) || string.IsNullOrEmpty(inbox.PushChannelUri))
{
return;
}
var client = await this.ClientTable.GetAsync(inbox.ClientPackageSecurityIdentifier);
string bearerToken = client.AccessToken;
var pushNotifyRequest = new HttpRequestMessage(HttpMethod.Post, inbox.PushChannelUri);
pushNotifyRequest.Headers.Authorization = new AuthenticationHeaderValue("Bearer", bearerToken);
pushNotifyRequest.Headers.Add("X-WNS-Type", "wns/raw");
pushNotifyRequest.Content = new StringContent(inbox.PushChannelContent ?? string.Empty);
// yes, it's a string, but we must claim it's an octet-stream
pushNotifyRequest.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
var response = await this.HttpClient.SendAsync(pushNotifyRequest);
if (response.IsSuccessStatusCode)
{
inbox.LastWindows8PushNotificationUtc = DateTime.UtcNow;
this.InboxTable.UpdateObject(inbox);
}
else
{
if (failedAttempts == 0)
{
var authHeader = response.Headers.WwwAuthenticate.FirstOrDefault();
if (authHeader != null)
{
if (authHeader.Parameter.Contains("Token expired"))
{
await client.AcquireWnsPushBearerTokenAsync(this.HttpClient);
this.ClientTable.UpdateObject(client);
await this.ClientTable.SaveChangesAsync();
await this.PushNotifyInboxMessageWinStoreAsync(inbox, failedAttempts + 1);
return;
}
}
}
// Log a failure.
// TODO: code here.
}
}
private async Task PushNotifyInboxMessageAsync(InboxEntity inbox)
{
Requires.NotNull(inbox, "inbox");
await Task.WhenAll(
this.PushNotifyInboxMessageWinStoreAsync(inbox),
this.PushNotifyInboxMessageWinPhoneAsync(inbox),
this.PushNotifyInboxMessageGoogleAsync(inbox),
this.PushNotifyInboxMessageAppleAsync(inbox));
}