Question

IIS 5.0 Custom Error Page doesn't execute as desired.

Asked by: NTJOCK

I used to have a custom error page in ASP on IIS 4.
When we upgraded to IIS 5 it stopped working.
I'm puzzled as to why it's not working and I've searched hi and low for a solution.  I consider this difficult because I have not been able to locate the answer and the page works when called directly.

1) Desired Result: Upon an error, this page is called and an email is sent detailing the problem.  The user sees a friendly error page.  Critical details are hidden from prying eyes.

What's happening:
- When an error occurs, the page loads, but doesn't send the email or display the error.  
- When the page is called directly  www.server.com\errors\404.asp  It works and sends the email.
- when the page is called by IIS in response to an error, nothing.  No error, no string, no email.

Language used, VB Script.
Used to be CDONTS, upgraded to new CDO model (really easy actually).

What I've tried:
I've hardcoded some response.write strings to force the output and try to trace the issue.

Server Environment:
Capable hardware, running 2003 Web Server Edition.
Stable production web server
Acceptable to good security configuration.
We have the machine audited weekly.
We are running the lockdown script to disable ports.
Server is on a firewalled network.  So when we look at the server directly the 192.168.1.x test will spit out the error directly so we can see it.

Other observations:
The page works when called directly.
Emails work from other functions on the site.
Removing all code except the email generator results in the same activity, no email is sent.

Hunches:
1) Server configuration that I don't know about.
2) Restriction in execution capabilities during error... ?
3) Minor mistake in code somewhere.

Live example ommitted because when I get it working I don't want 33000 emails.

Code:
<%@LANGUAGE="VBSCRIPT" CODEPAGE="1252"%>
<head>
<META NAME="ROBOTS" CONTENT="NOINDEX">
<title>A system Error has occured.</title>
</head>
<body >
<%
    Dim objASPError, blnErrorWritten, strServername, strServerIP, strRemoteIP
 
  'If Response.Buffer Then
  '  Response.Clear
  '  Response.Status = "Server Error"
  '  Response.ContentType = "text/html"
  '  Response.Expires = 0
  'End If
Set objASPError = Server.GetLastError
  Dim strErrorDescription
  strErrorDescription = "Category=" & objASPError.Category & vbCrLf
  If objASPError.ASPCode <> "" Then
    strErrorDescription = strErrorDescription & "Code=" & objASPError.ASPCode & vbCrLf
  End If
  strErrorDescription = strErrorDescription & "Number=(0x" & Hex(objASPError.Number) & ")" & vbCrLf
  strErrorDescription = strErrorDescription & "Description=" & objASPError.Description & vbCrLf
  If objASPError.ASPDescription <> "" Then
    strErrorDescription = strErrorDescription & "ASP Error Description=" & objASPError.Description
  End If
  blnErrorWritten = False
  strServername = LCase(Request.ServerVariables("SERVER_NAME"))
  strServerIP = Request.ServerVariables("LOCAL_ADDR")
  strRemoteIP =  Request.ServerVariables("REMOTE_ADDR")
  If objASPError.Source <> "" Then
    strErrorDescription = strErrorDescription & "File=" & objASPError.File & vbCrLf
    If objASPError.Line > 0 Then
      strErrorDescription = strErrorDescription & "Line=" & objASPError.Line
    End If
    If objASPError.Column > 0 Then
       strErrorDescription = strErrorDescription & ", Column= " & objASPError.Column
    End If
    strErrorDescription = strErrorDescription & vbCrLf
    strErrorDescription = strErrorDescription & "Code:" & vbCrLf & Server.HTMLEncode(objASPError.Source) & vbCrLf
    If objASPError.Column > 0 Then
      strErrorDescription = strErrorDescription & String((objASPError.Column - 1), "-") & "^" & vbCrLf
    End If
    blnErrorWritten = True
  End If
  If Not blnErrorWritten And objASPError.File <> "?" Then
    strErrorDescription = strErrorDescription & vbCrLf & "Filename=" & objASPError.File & vbCrLf
    If objASPError.Line > 0 Then
      strErrorDescription = strErrorDescription & "Number=" & objASPError.line
    End If
    If objASPError.Column > 0 Then
      strErrorDescription = strErrorDescription & ", Column=" & objASPError.Column
    End If
    strErrorDescription = strErrorDescription & vbCrLf
  End If
  Dim mymail, strBody
  Set mymail = Server.CreateObject("CDO.message")
  mymail.From = "ommitted"
  mymail.To ="ommitted"
  mymail.Subject = "ASP Error Occurred @"&now&" on "&date
  strBody = "An error occured on server=" & strServername&vbcrlf&" IP Address=" & strServerIP&vbcrlf
  strbody = strbody &vbcrlf& " Client IP=" & strRemoteIP&vbcrlf
  strBody = strBody & " at " & Now() & vbCrlf
  strBody = strBody & "BrowserType=" & Request.ServerVariables("HTTP_USER_AGENT") & vbCrlf
  strbody = strbody & "Method=" & Request.ServerVariables("REQUEST_METHOD") & vbCrlf
  strbody = strbody&"URL Called was: "&request.servervariables("URL")&vbcrlf
  strbody = strbody&"Query was: "&request.servervariables("query_string")&vbcrlf
  strbody = strbody&"Path was: "&request.servervariables("Path_translated")&vbcrlf
  strbody = strbody&"Referred by: "&request.ServerVariables("HTTP_REFERER")&vbcrlf
  strbody = strbody& "Error Message:"&vbcr&strErrorDescription & vbCrLf
  if sqlstring<>"" then   strbody = strbody& "SQL"&sqlstring
  mymail.textBody = strBody
response.write(strbody)
  mymail.Send
  Set mymail = Nothing
  if instr(1,strremotip,"192.168.1",1)>0 then response.write(strbody)

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Asked On
2005-11-24 at 10:34:19ID21642453
Tags

error

,

iis

,

custom

,

page

Topic

Active Server Pages (ASP)

Participating Experts
1
Points
500
Comments
6

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Answers

 

by: leechoonhweePosted on 2005-11-24 at 10:50:27ID: 15357761

Try changing the map to an URL instead of file.

 

by: NTJOCKPosted on 2005-11-24 at 15:37:08ID: 15358466

That's a good idea....

I've never used a URL redirect before.  What is the format that IIS wants?  I tried putting in the various styles and it still doesn't like them.

 

by: NTJOCKPosted on 2005-11-24 at 16:43:06ID: 15358568

Looks like the URL must be completely in the site.

so in our case
/errors/404.asp

errors must also have execute script permission.


thank you.

 

by: leechoonhweePosted on 2005-11-24 at 19:24:26ID: 15358875

Sorry I missed it out,  yes it must be intranet.

 

by: NTJOCKPosted on 2005-11-24 at 20:46:50ID: 15359180

no problem.  This is a good bit of info to have documented.... I pulled my hair out trying to find it.

 

by: leechoonhweePosted on 2005-11-24 at 23:34:57ID: 15359478

One thiing to note is that pointing to file will work with .htm files only. If server side language are used, it has to be URL. That is the whole logic behind it.

20120131-EE-VQP-002

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