5 // Igor Zelmanovich <igorz@mainsoft.com>
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7 // (C) 2007 Mainsoft, Inc. http://www.mainsoft.com
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10 // Permission is hereby granted, free of charge, to any person obtaining
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11 // a copy of this software and associated documentation files (the
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12 // "Software"), to deal in the Software without restriction, including
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13 // without limitation the rights to use, copy, modify, merge, publish,
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14 // distribute, sublicense, and/or sell copies of the Software, and to
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15 // permit persons to whom the Software is furnished to do so, subject to
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16 // the following conditions:
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18 // The above copyright notice and this permission notice shall be
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19 // included in all copies or substantial portions of the Software.
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21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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31 using System.Collections.Generic;
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33 using System.Web.UI;
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34 using System.Web.Script.Services;
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36 namespace System.Web.Handlers
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38 public class ScriptModule : IHttpModule
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40 protected virtual void Init (HttpApplication app) {
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41 app.PreSendRequestHeaders += new EventHandler (PreSendRequestHeaders);
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42 app.PostAcquireRequestState += new EventHandler (PostAcquireRequestState);
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43 app.AuthenticateRequest += new EventHandler (AuthenticateRequest);
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46 void AuthenticateRequest (object sender, EventArgs e) {
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47 // The AuthenticateRequest event is raised after the identity of the current user has been
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48 // established. The handler for this event sets the SkipAuthorization property of the HttpContext
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49 // for the current request. This property is checked in the authorization module to see
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50 // if it has to omit authorization checking for the requested url. Usually an HttpModule
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51 // use this property to allow anonymous access to some resources (for example,
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52 // the Login Page if we’re using forms authentication). In our scenario,
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53 // the ScriptModule sets the SkipAuthorization to true if the requested url is
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54 // scriptresource.axd or if the authorization module is enabled and the request is a rest
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55 // request to the authorization web service.
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58 void PostAcquireRequestState (object sender, EventArgs e) {
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59 // The PostAcquireRequestState event is raised after the session data has been obtained.
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60 // If the request is for a class that implements System.Web.UI.Page and it is a rest
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61 // method call, the WebServiceData class (that was explained in a previous post) is used
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62 // to call the requested method from the Page. After the method has been called,
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63 // the CompleteRequest method is called, bypassing all pipeline events and executing
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64 // the EndRequest method. This allows MS AJAX to be able to call a method on a page
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65 // instead of having to create a web service to call a method.
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66 HttpApplication app = (HttpApplication) sender;
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67 HttpContext context = app.Context;
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68 if (context == null)
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71 HttpRequest request = context.Request;
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72 string contentType = request.ContentType;
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73 IHttpHandler currentHandler = context.CurrentHandler;
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74 if (currentHandler == null)
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76 Type pageType = currentHandler.GetType ();
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77 if (typeof (Page).IsAssignableFrom (pageType) && !String.IsNullOrEmpty (contentType) && contentType.StartsWith ("application/json", StringComparison.OrdinalIgnoreCase)) {
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78 IHttpHandler h = RestHandler.GetHandler (context, pageType, request.FilePath);
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79 h.ProcessRequest (context);
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80 app.CompleteRequest ();
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84 void PreSendRequestHeaders (object sender, EventArgs e)
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86 HttpApplication app = (HttpApplication) sender;
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87 HttpContext context = app.Context;
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88 if (context.Request.Headers ["X-MicrosoftAjax"] == "Delta=true") {
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89 Page p = context.CurrentHandler as Page;
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90 ScriptManager sm = ScriptManager.GetCurrentInternal (p);
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91 if (context.Response.StatusCode == 302) {
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92 context.Response.StatusCode = 200;
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93 context.Response.ClearContent ();
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94 if (context.Error == null || (sm != null && sm.AllowCustomErrorsRedirect))
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95 ScriptManager.WriteCallbackRedirect (context.Response.Output, context.Response.RedirectLocation);
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97 ScriptManager.WriteCallbackException (sm, context.Response.Output, context.Error, false);
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98 } else if (context.Error != null) {
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99 context.Response.StatusCode = 200;
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100 context.Response.ClearContent ();
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101 ScriptManager.WriteCallbackException (sm, context.Response.Output, context.Error, true);
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106 protected virtual void Dispose () {
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109 #region IHttpModule Members
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111 void IHttpModule.Dispose () {
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115 void IHttpModule.Init (HttpApplication context) {
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