/// <summary>
/// Responds to requests generated by subscriptions registered with
/// the SharePoint WebHook REST API.
/// </summary>
/// <param name="validationToken">The validation token (guid) sent by SharePoint when
/// validating the Notification URL for the web hook subscription.</param>
public async Task <HttpResponseMessage> Post(string validationToken = null)
{
// If a validation token is present, we need to respond within 5 seconds by
// returning the given validation token. This only happens when a new
// web hook is being added
if (validationToken != null)
{
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(validationToken);
return(response);
}
// Read and parse the request body.
var content = await Request.Content.ReadAsStringAsync();
var notifications = JsonConvert.DeserializeObject <ResponseModel <NotificationModel> >(content).Value;
if (notifications.Count > 0)
{
// do something with the received notification
ChangeManager changeManager = new ChangeManager();
foreach (var notification in notifications)
{
// Recommended async pattern: this request must be processed within 5 seconds,
// hence it's better to do the processing using an asynchronous pattern.
changeManager.AddNotificationToQueue(CloudConfigurationManager.GetSetting("StorageConnectionString"), notification);
// Synchronous pattern: only for very simple operations that always complete within 5 seconds!
//changeManager.ProcessNotification(notification);
}
}
// if we get here we assume the request was well received
return(new HttpResponseMessage(HttpStatusCode.OK));
}