public async Task Send(WnsNotification notification)
{
// Get or renew our access token
var accessToken = await AccessTokenManager.GetAccessToken();
//https://cloud.notify.windows.com/?token=.....
//Authorization: Bearer {AccessToken}
//
// Not sure how to do this in httpclient
var http = new HttpClient();
http.DefaultRequestHeaders.ExpectContinue = false; //Disable expect-100 to improve latency
http.DefaultRequestHeaders.TryAddWithoutValidation("X-WNS-Type", string.Format("wns/{0}", notification.Type.ToString().ToLower()));
if (!http.DefaultRequestHeaders.Contains("Authorization")) //prevent double values
{
http.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Bearer " + accessToken);
}
if (notification.RequestForStatus.HasValue)
{
http.DefaultRequestHeaders.TryAddWithoutValidation("X-WNS-RequestForStatus", notification.RequestForStatus.Value.ToString().ToLower());
}
if (notification.TimeToLive.HasValue)
{
http.DefaultRequestHeaders.TryAddWithoutValidation("X-WNS-TTL", notification.TimeToLive.Value.ToString()); //Time to live in seconds
}
if (notification.Type == WnsNotificationType.Tile)
{
var winTileNot = notification as WnsTileNotification;
if (winTileNot != null && winTileNot.CachePolicy.HasValue)
{
http.DefaultRequestHeaders.Add("X-WNS-Cache-Policy", winTileNot.CachePolicy == WnsNotificationCachePolicyType.Cache ? "cache" : "no-cache");
}
if (winTileNot != null && !string.IsNullOrEmpty(winTileNot.NotificationTag))
{
http.DefaultRequestHeaders.Add("X-WNS-Tag", winTileNot.NotificationTag); // TILE only
}
}
else if (notification.Type == WnsNotificationType.Badge)
{
var winTileBadge = notification as WnsBadgeNotification;
if (winTileBadge != null && winTileBadge.CachePolicy.HasValue)
{
http.DefaultRequestHeaders.Add("X-WNS-Cache-Policy", winTileBadge.CachePolicy == WnsNotificationCachePolicyType.Cache ? "cache" : "no-cache");
}
}
HttpContent content = null;
if (notification.Type == WnsNotificationType.Raw)
{
content = new StreamContent(new MemoryStream(((WnsRawNotification)notification).RawData));
}
else
{
content = new StringContent(
notification.Payload.ToString(), // Get XML payload
Encoding.UTF8,
"text/xml");
}
var result = await http.PostAsync(notification.ChannelUri, content);
var status = ParseStatus(result, notification);
//RESPONSE HEADERS
// X-WNS-Debug-Trace string
// X-WNS-DeviceConnectionStatus connected | disconnected | tempdisconnected (if RequestForStatus was set to true)
// X-WNS-Error-Description string
// X-WNS-Msg-ID string (max 16 char)
// X-WNS-NotificationStatus received | dropped | channelthrottled
//
// 200 OK
// 400 One or more headers were specified incorrectly or conflict with another header.
// 401 The cloud service did not present a valid authentication ticket. The OAuth ticket may be invalid.
// 403 The cloud service is not authorized to send a notification to this URI even though they are authenticated.
// 404 The channel URI is not valid or is not recognized by WNS. - Raise Expiry
// 405 Invalid Method - never will get
// 406 The cloud service exceeded its throttle limit.
// 410 The channel expired. - Raise Expiry
// 413 The notification payload exceeds the 5000 byte size limit.
// 500 An internal failure caused notification delivery to fail.
// 503 The server is currently unavailable.
// OK, everything worked!
if (status.HttpStatus == HttpStatusCode.OK &&
status.NotificationStatus == WnsNotificationSendStatus.Received)
{
return;
}
//401
if (status.HttpStatus == HttpStatusCode.Unauthorized)
{
AccessTokenManager.InvalidateAccessToken(accessToken);
throw new RetryAfterException(notification, "Access token expired", DateTime.UtcNow.AddSeconds(5));
}
//404 or 410
if (status.HttpStatus == HttpStatusCode.NotFound || status.HttpStatus == HttpStatusCode.Gone)
{
throw new DeviceSubscriptionExpiredException(notification)
{
OldSubscriptionId = notification.ChannelUri,
ExpiredAt = DateTime.UtcNow
};
}
// Any other error
throw new WnsNotificationException(status);
}