classifiedshttpapplication.cs

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using System;
using System.Web;
using System.Web.Security;
using System.IO;
using System.Configuration;
using System.Threading;

using AspNet.StarterKits.Classifieds.BusinessLogicLayer;

namespace AspNet.StarterKits.Classifieds.Web
{
	public class ClassifiedsHttpApplication : HttpApplication
	{

		private static object _settingsLock = new object();
		private static object _notificationLock = new object();

		private static SiteSettings _settings;
		private static DateTime _lastNotificationTime;
		private static string _siteUrl;
		private static Timer _hourlyTimer;

		public static SiteSettings ClassifiedsApplicationSettings
		{
			get
			{
				if (_settings == null)
					ClassifiedsApplicationSettings = SiteSettings.LoadFromConfiguration();
				return _settings;
			}
			set
			{
				if (value == null)
					throw new ArgumentNullException("ClassifiedsApplicationSettings cannot be set to null");
				lock (_settingsLock)
				{
					_settings = value;
				}
			}
		}

		public static DateTime LastNotificationSent
		{
			get
			{
				return _lastNotificationTime;
			}
			set
			{
				lock (_notificationLock)
				{
					_lastNotificationTime = value;
				}
			}
		}

		public static string SiteUrl
		{
			get
			{
				return _siteUrl;
			}
		}

		public void Application_Start(Object sender, EventArgs e)
		{
			_siteUrl = GetSiteUrl();

			// set-up Settings
			ClassifiedsHttpApplication.ClassifiedsApplicationSettings = SiteSettings.LoadFromConfiguration();

			// set-up maintenance timer
			_lastNotificationTime = DateTime.Now;
			TimerCallback callback = new TimerCallback(Maintenance.HourlyMaintenanceTimer);
			_hourlyTimer = new Timer(callback, null, TimeSpan.Zero, TimeSpan.FromHours(1.0));
		}

		private string GetSiteUrl()
		{
			string baseUrl = null;
			HttpContext c = HttpContext.Current;
			if (c != null)
			{
				string port = c.Request.ServerVariables["SERVER_PORT"];
				if (port == null || port.Equals("80") || port.Equals("443"))
					port = String.Empty;
				else
					port = ":" + port;

				string protocol = c.Request.ServerVariables["SERVER_PORT_SECURE"];

				if (protocol == null || protocol.Equals("0"))
					protocol = "http://";
				else
					protocol = "https://";

				baseUrl = protocol + c.Request.ServerVariables["SERVER_NAME"] + port + c.Request.ApplicationPath;
			}
			return baseUrl;
		}

		void Application_End(Object sender, EventArgs e)
		{

		}

		void Application_Error(Object sender, EventArgs e)
		{

		}
	}
}