123 lines
5.1 KiB
C#
123 lines
5.1 KiB
C#
//
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// ScriptModule.cs
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//
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// Author:
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// Igor Zelmanovich <igorz@mainsoft.com>
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//
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// (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Web.UI;
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using System.Web.Script.Services;
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namespace System.Web.Handlers
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{
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public class ScriptModule : IHttpModule
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{
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protected virtual void Init (HttpApplication app) {
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app.PreSendRequestHeaders += new EventHandler (PreSendRequestHeaders);
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app.PostAcquireRequestState += new EventHandler (PostAcquireRequestState);
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app.AuthenticateRequest += new EventHandler (AuthenticateRequest);
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}
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void AuthenticateRequest (object sender, EventArgs e) {
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// The AuthenticateRequest event is raised after the identity of the current user has been
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// established. The handler for this event sets the SkipAuthorization property of the HttpContext
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// for the current request. This property is checked in the authorization module to see
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// if it has to omit authorization checking for the requested url. Usually an HttpModule
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// use this property to allow anonymous access to some resources (for example,
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// the Login Page if we’re using forms authentication). In our scenario,
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// the ScriptModule sets the SkipAuthorization to true if the requested url is
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// scriptresource.axd or if the authorization module is enabled and the request is a rest
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// request to the authorization web service.
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}
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void PostAcquireRequestState (object sender, EventArgs e) {
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// The PostAcquireRequestState event is raised after the session data has been obtained.
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// If the request is for a class that implements System.Web.UI.Page and it is a rest
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// method call, the WebServiceData class (that was explained in a previous post) is used
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// to call the requested method from the Page. After the method has been called,
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// the CompleteRequest method is called, bypassing all pipeline events and executing
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// the EndRequest method. This allows MS AJAX to be able to call a method on a page
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// instead of having to create a web service to call a method.
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HttpApplication app = (HttpApplication) sender;
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HttpContext context = app.Context;
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if (context == null)
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return;
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HttpRequest request = context.Request;
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string contentType = request.ContentType;
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IHttpHandler currentHandler = context.CurrentHandler;
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if (currentHandler == null)
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return;
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Type pageType = currentHandler.GetType ();
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if (typeof (Page).IsAssignableFrom (pageType) && !String.IsNullOrEmpty (contentType) && contentType.StartsWith ("application/json", StringComparison.OrdinalIgnoreCase)) {
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IHttpHandler h = RestHandler.GetHandler (context, pageType, request.FilePath);
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h.ProcessRequest (context);
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app.CompleteRequest ();
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}
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}
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void PreSendRequestHeaders (object sender, EventArgs e)
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{
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HttpApplication app = (HttpApplication) sender;
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HttpContext context = app.Context;
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if (context.Request.Headers ["X-MicrosoftAjax"] == "Delta=true") {
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Page p = context.CurrentHandler as Page;
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ScriptManager sm = ScriptManager.GetCurrentInternal (p);
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if (context.Response.StatusCode == 302) {
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context.Response.StatusCode = 200;
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context.Response.ClearContent ();
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if (context.Error == null || (sm != null && sm.AllowCustomErrorsRedirect))
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ScriptManager.WriteCallbackRedirect (context.Response.Output, context.Response.RedirectLocation);
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else
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ScriptManager.WriteCallbackException (sm, context.Response.Output, context.Error, false);
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} else if (context.Error != null) {
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context.Response.StatusCode = 200;
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context.Response.ClearContent ();
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ScriptManager.WriteCallbackException (sm, context.Response.Output, context.Error, true);
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}
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}
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}
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protected virtual void Dispose () {
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}
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#region IHttpModule Members
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void IHttpModule.Dispose () {
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Dispose ();
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}
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void IHttpModule.Init (HttpApplication context) {
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Init (context);
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}
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#endregion
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}
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}
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