Added GetMainUrl "smart" method.

Core/Settings.cs

@@ -605,6 +605,24 @@ namespace ScrewTurn.Wiki {
 			}
 		}
 
+		/// <summary>
+		/// Gets the main URL of the wiki, defaulting to the current request URL if none is configured manually.
+		/// </summary>
+		/// <returns>The URL of the wiki.</returns>
+		public static Uri GetMainUrl() {
+			Uri mainUrl = new Uri(MainUrl);
+			if(mainUrl.Host == "www.server.com") {
+				try {
+					// STW never uses internal URLs with slashes, so trimming to the last slash should work
+					// Example: http://server/wiki/namespace.page.ashx
+					string temp = HttpContext.Current.Request.Url.ToString();
+					mainUrl = new Uri(temp.Substring(0, temp.LastIndexOf("/") + 1));
+				}
+				catch { }
+			}
+			return mainUrl;
+		}
+
 		/// <summary>
 		/// Gets the correct path to use with Cookies.
 		/// </summary>
@@ -878,14 +896,11 @@ namespace ScrewTurn.Wiki {
 		/// <summary>
 		/// Gets or sets the IP/Host filter for page editing.
 		/// </summary>
-	    public static string IpHostFilter
-	    {
-	        get{
-	       
-	            return Provider.GetSetting("IpHostFilter");
+		public static string IpHostFilter {
+			get {
+				return GetString(Provider.GetSetting("IpHostFilter"), "");
 			}
-            set
-            {
+			set {
 				Provider.SetSetting("IpHostFilter", value);
 			}
 		}