Below is the list of Events raised by HttpHandlers. These events are in the sequence of firing.
OnBeginRequest
OnAuthenticateRequest
OnPostAuthenticateRequest
OnAuthorizeRequest
OnPostAuthorizeRequest
OnResolveRequestCache
OnPostResolveRequestCache
OnPostMapRequestHandler
OnAcquireRequestState
OnPostAcquireRequestState
OnPreRequestHandlerExecute
Page_Load Event of the Page
OnPostRequestHandlerExecute
OnReleaseRequestState
OnPostReleaseRequestState
OnUpdateRequestCache
OnPostUpdateRequestCache
OnEndRequest
OnPreSendRequestHeaders
I wrote a http handler to check the sequence of execution of event handlers. Below is the program. Two events in the program are commented because these require integration with the IIS pipeline. I used Visual Web Developer 2008 Express Edition Beta 2 to write this program. So may be express edition does not support integration with IIS. I haven't checked it yet. Here is the program:
using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml.Linq;
/// <summary>
/// Summary description for AddSign
/// </summary>
public class AddSign: IHttpModule
{
public delegate void MyEventHandler(Object s, EventArgs e);
private MyEventHandler _eventHandler = null;
public event MyEventHandler MyEvent
{
add { _eventHandler += value; }
remove { _eventHandler -= value; }
}
public AddSign()
{
//
// TODO: Add constructor logic here
//
}
#region IHttpModule Members
void IHttpModule.Dispose()
{
//throw new NotImplementedException();
}
void IHttpModule.Init(HttpApplication context)
{
//throw new NotImplementedException();
context.EndRequest += new EventHandler(OnEndRequest);
context.AcquireRequestState += new EventHandler(OnAcquireRequestState);
context.AuthenticateRequest += new EventHandler(OnAuthenticateRequest);
context.AuthorizeRequest += new EventHandler(OnAuthorizeRequest);
context.BeginRequest += new EventHandler(OnBeginRequest);
context.Disposed += new EventHandler(OnDisposed);
context.Error += new EventHandler(OnError);
//context.LogRequest += new EventHandler(OnLogRequest); //This operation requires IIS integrated pipeline mode.
//context.MapRequestHandler += new EventHandler(OnMapRequestHandler); //This operation requires IIS integrated pipeline mode.
context.PostAcquireRequestState += new EventHandler(OnPostAcquireRequestState);
context.PostAuthenticateRequest += new EventHandler(OnPostAuthenticateRequest);
context.PostAuthorizeRequest += new EventHandler(OnPostAuthorizeRequest);
context.PostMapRequestHandler += new EventHandler(OnPostMapRequestHandler);
context.PostReleaseRequestState += new EventHandler(OnPostReleaseRequestState);
context.PostRequestHandlerExecute += new EventHandler(OnPostRequestHandlerExecute);
context.PostResolveRequestCache += new EventHandler(OnPostResolveRequestCache);
context.PostUpdateRequestCache += new EventHandler(OnPostUpdateRequestCache);
context.PreRequestHandlerExecute += new EventHandler(OnPreRequestHandlerExecute);
context.PreSendRequestContent += new EventHandler(OnPreSendRequestContent);
context.PreSendRequestHeaders += new EventHandler(OnPreSendRequestHeaders);
context.ReleaseRequestState += new EventHandler(OnReleaseRequestState);
context.ResolveRequestCache += new EventHandler(OnResolveRequestCache);
context.UpdateRequestCache += new EventHandler(OnUpdateRequestCache);
}
#endregion
public void OnEndRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnEndRequest<br />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnAcquireRequestState(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnAcquireRequestState");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnAuthenticateRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnAuthenticateRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnAuthorizeRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnAuthorizeRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnBeginRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnBeginRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnDisposed(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnDisposed");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnError(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnError");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
app.Context.Response.Write("<BR />");
_eventHandler(this, null);
}
public void OnLogRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnLogRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnMapRequestHandler(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnMapRequestHandler");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostAcquireRequestState(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostAcquireRequestState");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostAuthenticateRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostAuthenticateRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostAuthorizeRequest(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostAuthorizeRequest");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostMapRequestHandler(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostMapRequestHandler");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostReleaseRequestState(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostReleaseRequestState");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostRequestHandlerExecute(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostRequestHandlerExecute");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostResolveRequestCache(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostResolveRequestCache");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPostUpdateRequestCache(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPostUpdateRequestCache");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPreRequestHandlerExecute(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPreRequestHandlerExecute");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPreSendRequestContent(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPreSendRequestContent");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnPreSendRequestHeaders(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnPreSendRequestHeaders");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnReleaseRequestState(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnReleaseRequestState");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnResolveRequestCache(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnResolveRequestCache");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
public void OnUpdateRequestCache(Object s, EventArgs e)
{
HttpApplication app = s as HttpApplication;
app.Context.Response.Write("OnUpdateRequestCache");
app.Context.Response.Write("<BR />");
if (_eventHandler != null)
_eventHandler(this, null);
}
}
