How to catch error 401 access denied and redirect to custom error page ?

  • Thread starter Thread starter rote
  • Start date Start date
R

rote

I'm using ASP.NET 2.0 and i have copied and pasted the code below to my
Global.asax file but it desn't trap
the error
I want to trap the 401 access denied
void Application_Error(object sender, EventArgs e)
{


Exception exception = Server.GetLastError();

try

{

HttpException httpException = (HttpException)exception;

int httpCode = httpException.GetHttpCode();

switch (httpCode)

{

case 401: Response.Redirect("~/Pages/Error/NoAccess.aspx"); break;

case 404: Response.Redirect("~/Pages/Error/PageNotFound.aspx"); break;

default: Response.Redirect("~/Pages/Error/Generic.aspx"); break;

}

}

catch { }

Server.ClearError();

}
I know i can't use the normal custom error in the web config either beacuse
it doesn't work
Any ideas how to trap this?

<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">


<error statusCode="401" redirect="accessdenied.htm" ></customErrors>
HTTP Error 401.1 - Unauthorized: Access is denied due to invalid
credentials.
Internet Information Services (IIS)
 
I'm using ASP.NET 2.0 and i have copied and pasted the code below to my
Global.asax file but it desn't trap
the error
I want to trap the 401 access denied
void Application_Error(object sender, EventArgs e)
{

Exception exception = Server.GetLastError();

try

{

 HttpException httpException = (HttpException)exception;

int httpCode = httpException.GetHttpCode();

switch (httpCode)

{

 case 401: Response.Redirect("~/Pages/Error/NoAccess.aspx"); break;

case 404: Response.Redirect("~/Pages/Error/PageNotFound.aspx"); break;

default: Response.Redirect("~/Pages/Error/Generic.aspx"); break;

 }

}

catch { }

Server.ClearError();

}

I know i can't use the normal custom error in the web config either beacuse
it doesn't work
Any ideas how to trap this?

<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">

<error statusCode="401" redirect="accessdenied.htm" ></customErrors>
HTTP Error 401.1 - Unauthorized: Access is denied due to invalid
credentials.
Internet Information Services (IIS)
Click to expand...

Look at the following tip
http://www.codeproject.com/KB/aspnet/Custon401Page.aspx
 
Thanks Alexey.
But in asp.net 2.0 there is no Application_EndRequest event in the global
asax
and by the way i have to disable Allow ananonymous access..
Any ideas

I'm using ASP.NET 2.0 and i have copied and pasted the code belowe global
.as to my
Global.asax file but it desn't trap
the error
I want to trap the 401 access denied
void Application_Error(object sender, EventArgs e)
{

Exception exception = Server.GetLastError();

try

{

HttpException httpException = (HttpException)exception;

int httpCode = httpException.GetHttpCode();

switch (httpCode)

{

case 401: Response.Redirect("~/Pages/Error/NoAccess.aspx"); break;

case 404: Response.Redirect("~/Pages/Error/PageNotFound.aspx"); break;

default: Response.Redirect("~/Pages/Error/Generic.aspx"); break;

}

}

catch { }

Server.ClearError();

}

I know i can't use the normal custom error in the web config either
beacuse
it doesn't work
Any ideas how to trap this?

<customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">

<error statusCode="401" redirect="accessdenied.htm" ></customErrors>
HTTP Error 401.1 - Unauthorized: Access is denied due to invalid
credentials.
Internet Information Services (IIS)
Click to expand...

Look at the following tip
http://www.codeproject.com/KB/aspnet/Custon401Page.aspx
 
You'll need to convert this code to C#, but it works in VB.NET ...

In global.asax :

Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)
Server.Transfer("Errors.aspx")
End Sub

Errors.aspx :
--------------------
<html>
<script language="VB" runat="server">
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim errMessage As String = ""
Dim appException As System.Exception = Server.GetLastError()
If (TypeOf (appException) Is HttpException) Then
Dim checkException As HttpException = CType(appException, HttpException)
Select Case checkException.GetHttpCode
Case 400
errMessage &= "Bad request. The file size is too large."
Case 401
errMessage &= "You are not authorized to view this page."
Case 403
errMessage &= "You are not allowed to view that page."
Case 404
errMessage &= "The page you have requested can't be found."
Case 408
errMessage &= "The request has timed out."
Case 500
errMessage &= "The server can't fulfill your request."
Case Else
errMessage &= "The server has experienced an error."
End Select
Else
errMessage &= "The following error occurred<BR>" & appException.ToString
End If
ErrorMessage.Text = errMessage & "<BR>We're sorry for the inconvenience."
Server.ClearError()
End Sub
</script>
<body>
<hr>
<asp:label id="ErrorMessage" font-size="12" font-bold="true" runat=server/>
<hr>
</body>
</html>
--------------

That traps 401, and the other listed errors, fine.



Juan T. Llibre, asp.net MVP
asp.net faq : http://asp.net.do/faq/
foros de asp.net, en español : http://asp.net.do/foros/
======================================
 
Thanks Alexey.
But in asp.net 2.0 there is no Application_EndRequest event in the global
asax
and by the way i have to disable Allow ananonymous access..
Any ideas











Look at the following tiphttp://www.codeproject.com/KB/aspnet/Custon401Page.aspx- Hide quoted text -

- Show quoted text -
Click to expand...

Hi Patrick

you just need to add the code to you global.asax. It simply does not
add all methods by default... Moreover, if you may access the IIS, you
might try to use custom 401. Using the IIS Manager, go to the
properties of your site, then go to the Custom Errors tab to Edit the
various 401 errors and assign a custom redirection.

Hope this helps
 
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