Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/PageHandlerFactory.cs

@@ -0,0 +1,73 @@
+//------------------------------------------------------------------------------
+// <copyright file="PageHandlerFactory.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Handler Factory implementation for Page files
+ *
+ * Copyright (c) 1999 Microsoft Corporation
+ */
+
+namespace System.Web.UI {
+using System.Runtime.Serialization.Formatters;
+
+using System.IO;
+using System.Security.Permissions;
+using System.Web.Compilation;
+using System.Web.Util;
+using Debug=System.Web.Util.Debug;
+
+/*
+ * Handler Factory implementation for ASP.NET files
+ */
+[PermissionSet(SecurityAction.LinkDemand, Unrestricted = true)]
+[PermissionSet(SecurityAction.InheritanceDemand, Unrestricted=true)]
+public class PageHandlerFactory : IHttpHandlerFactory2 {
+
+    private bool _isInheritedInstance;
+
+    protected internal PageHandlerFactory() {
+        // Check whether this is the exact PageHandlerFactory, or a derived class
+        _isInheritedInstance = (GetType() != typeof(PageHandlerFactory));
+    }
+
+    public virtual IHttpHandler GetHandler(HttpContext context, string requestType, string virtualPath, string path) {
+        Debug.Trace("PageHandlerFactory", "PageHandlerFactory: " + virtualPath);
+
+        // This should never get called in ISAPI mode but currently is in integrated mode
+        // Debug.Assert(false);
+
+        return GetHandlerHelper(context, requestType, VirtualPath.CreateNonRelative(virtualPath), path);
+    }
+
+    IHttpHandler IHttpHandlerFactory2.GetHandler(HttpContext context, String requestType,
+        VirtualPath virtualPath, String physicalPath) {
+
+        // If it's a derived class, we must call the old (less efficient) GetHandler, in
+        // case it was overriden
+        if (_isInheritedInstance) {
+            return GetHandler(context, requestType, virtualPath.VirtualPathString, physicalPath);
+        }
+
+        return GetHandlerHelper(context, requestType, virtualPath, physicalPath);
+    }
+
+    public virtual void ReleaseHandler(IHttpHandler handler) { }
+
+    private IHttpHandler GetHandlerHelper(HttpContext context, string requestType,
+        VirtualPath virtualPath, string physicalPath) {
+
+        Page page = BuildManager.CreateInstanceFromVirtualPath(
+            virtualPath, typeof(Page), context, true /*allowCrossApp*/) as Page;
+        if (page == null)
+            return null;
+
+        page.TemplateControlVirtualPath = virtualPath;
+
+        return page;
+    }
+
+}
+}