Push Sharp inside Asp.Net Web Service

Question

This is a more general question about the Asp.Net/.Net life cycle.

I am looking for using PushSharp in the Asp.Net web service to send notifications using APNS.

Given the nature of PushSharp, using a queue to send asynchronous messages and then event callbacks to notify of an OnNotificationSent / OnServiceException, etc. How will it work in Asp.net?

• The web service provides a method that instantiates PushSharp, logs various callback events and queue notification messages.
• User calls web service
• As soon as the Web service method returns, does this method continue to receive event callbacks or is in it and the events will not be called?

Thanks for your help.

Answer 1

Not recommended in Asp.net, due to application pool interference in the process (the author of PushSharp reports queued notifications, but is not sent). I implemented this, though on the Asp.net website, and it works.

I have converted this to a windows service since.

Global.asax.cs file :

using PushSharp;

using PushSharp.Core;

public class Global : System.Web.HttpApplication
{

    private static PushBroker myPushBroker;

        void Application_Start(object sender, EventArgs e)
        {
            // Code that runs on application startup
            myPushBroker = new PushBroker();

            myPushBroker.OnNotificationSent += NotificationSent;
            myPushBroker.OnChannelException += ChannelException;
            myPushBroker.OnServiceException += ServiceException;
            myPushBroker.OnNotificationFailed += NotificationFailed;
            myPushBroker.OnDeviceSubscriptionExpired += DeviceSubscriptionExpired;
            myPushBroker.OnDeviceSubscriptionChanged += DeviceSubscriptionChanged;
            myPushBroker.OnChannelCreated += ChannelCreated;
            myPushBroker.OnChannelDestroyed += ChannelDestroyed;

            HttpContext.Current.Application["MyPushBroker"] = myPushBroker;

         }

         //IMPLEMENT PUSHBROKER DELEGATES HERE
}

aspx.cs file (Notifications.aspx.cs example):

using PushSharp;

using PushSharp.Apple;

using PushSharp.Core;

public partial class Notifications : System.Web.UI.Page {

     private PushBroker myPushBroker = HttpContext.Current.Application["MyPushBroker"] as PushBroker;

        //SO I CAN SWITCH FROM DEVELOPMENT TO PRODUCTION EASILY I SET THIS IN THE DATABASE
        private string pushCertificate = "";
        private string certPass = "";
        private bool isProduction = false;

     protected void btnSendNotification_Click(object sender, EventArgs e)
     {
            bool hasError = false;
            lblError.Text = "";

            if (!string.IsNullOrEmpty(txtMessage.Text))
            {
                try
                {
                   GetCertificate(); 

                    //GET DEVICE TOKENS TO SEND MESSAGES TO
                    //NOT THE BEST WAY TO SEND MESSAGES IF YOU HAVE HUNDREDS IF NOT THOUSANDS OF TOKENS. THAT WHY A WINDOWS SERVICE IS RECOMMENDED.

                    string storedProcUser = "sp_Token_GetAll";
                    string userTableName = "User_Table";

                    DataSet dsUser = new DataSet();

                    UserID = new Guid(ID.Text);
                    dsUser = srvData.GetDeviceToken(UserID, storedProcUser, userTableName, dataConn);

                    DataTable userTable = new DataTable();
                    userTable = dsUser.Tables[0];

                    if (userTable.Rows.Count != 0)
                    {
                        string p12FileName = Server.MapPath(pushCertificate); //SET IN THE GET CERTIFICATE
                        var appleCert = File.ReadAllBytes(p12FileName);
                        string p12Password = certPass;

                        //REGISTER SERVICE
                        myPushBroker.RegisterAppleService(new ApplePushChannelSettings(isProduction, appleCert, p12Password));

                        DataRow[] drDataRow;
                        drDataRow = userTable.Select();
                        string savedDeviceToken = "";

                        for (int i = 0; i < userTable.Rows.Count; i++)
                        {
                            if (drDataRow[i]["DeviceToken"] is DBNull == false)
                            {
                                savedDeviceToken = drDataRow[i]["DeviceToken"].ToString();

                                myPushBroker.QueueNotification(new AppleNotification()
                                           .ForDeviceToken(savedDeviceToken)
                                           .WithAlert(txtMessage.Text)
                                           .WithBadge(1)
                                           .WithSound("sound.caf"));

                                //NOTHING TO DO ANYMORE. CAPTURE IN THE PUSH NOTIFICATION DELEGATE OF GLOBAL ASCX FILE WHAT HAPPENED TO THE SENT MESSAGE.
                            }
                        }
                    }

                }
                catch(Exception ex)
                {
                }
                 finally
                {
                }

            }
     }
}

Answer 2

The EasyServices checkout allows you to easily send notifications to various push servers using PushSharp without worrying about notifications received even when using ASP.NET

var _pushNotificationService = EngineContext.Current.Resolve<IPushNotificationService>();
_pushNotificationService.InsertNotification(NotificationType type, string title, string message, int subscriberId, PushPriority Priority = PushPriority.Normal);

https://easyservices.codeplex.com