Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UrlMappingsModule.cs

@@ -0,0 +1,55 @@
+namespace System.Web {
+    using System;
+    using System.Web;
+    using System.Web.Util;
+    using System.Web.Configuration;
+
+
+    //
+    // Module that implements the UrlMappings functionality
+    // on IIS 7 in integrated mode, this takes the place of
+    // the UrlMappings execution step and is listed in <modules/>
+    sealed internal class UrlMappingsModule : IHttpModule {
+
+        internal UrlMappingsModule() {}
+
+        public void Init(HttpApplication application) {
+                bool urlMappingsEnabled = false;
+                UrlMappingsSection urlMappings = RuntimeConfig.GetConfig().UrlMappings;
+                urlMappingsEnabled = urlMappings.IsEnabled && ( urlMappings.UrlMappings.Count > 0 );
+
+                if (urlMappingsEnabled) {
+                    application.BeginRequest += new EventHandler(OnEnter);
+                }
+        }
+
+        public void Dispose() {}
+
+        internal void OnEnter(Object source, EventArgs eventArgs) {
+            HttpApplication app = (HttpApplication) source;
+            UrlMappingRewritePath(app.Context);
+        }
+
+        internal static void UrlMappingRewritePath(HttpContext context) {
+            HttpRequest request = context.Request;
+            UrlMappingsSection urlMappings = RuntimeConfig.GetAppConfig().UrlMappings;
+            string path = request.Path;
+            string mappedUrl = null;
+
+            // First check path with query string (for legacy reasons)
+            string qs = request.QueryStringText;
+            if (!String.IsNullOrEmpty(qs)) {
+                mappedUrl = urlMappings.HttpResolveMapping(path + "?" + qs);
+            }
+
+            // Check Path if not found
+            if (mappedUrl == null)
+                mappedUrl = urlMappings.HttpResolveMapping(path);
+
+            if (!String.IsNullOrEmpty(mappedUrl))
+                context.RewritePath(mappedUrl, false);
+        }
+    }
+}
+
+