Hi,
I cannot reproduce this problem on a Windows 2003 R2 machine with IIS 6
installed. From your description it's caused by the execution of the code
after the user has been authenticated. So I tried this:
Public Class MyHandler
Implements IHttpHandler
Public Sub ProcessRequest(ByVal context As HttpContext)
Dim response As HttpResponse = context.Response
Dim strFileName As String = context.Request.QueryString("file")
If String.IsNullOrEmpty(strFileName) = False Then
strFileName = context.Server.MapPath(strFileName)
Dim fi As FileInfo = New System.IO.FileInfo(strFileName)
context.Response.Clear()
context.Response.StatusCode = 200
context.Response.ContentType = "application/zip"
context.Response.AddHeader("Content-Disposition", "attachment;
filename=" & strFileName)
context.Response.AddHeader("Content-Length", fi.Length.ToString())
context.Response.SuppressContent = False
context.Response.Buffer = False
context.Response.BufferOutput = False
context.Response.TransmitFile(strFileName,0,-1)
context.Response.Flush()
context.Response.Close()
End If
End Sub
Public ReadOnly Property IsReusable() As Boolean
Get
Return False
End Get
End Property
End Class
Basically I used the code in the logic path after the user is
authenticated, including calling TransmitFile method, which as you said, is
the culprit.
However, the log appears as normal when I request something like
http://localhost/.../1.ashx?file=1.zip and the file is successfully
downloaded.
Because I cannot reproduce it I have the following suggestions:
1. Please create a new project and use above code to test. Request the ashx
via IE on the server machine using localhost. Thus we can make sure our
repro steps are same. Can you see the log in this way? If you can see the
log you can add other code blocks one by one until finding the culprit.
2. Please note in IIS 6 the log will not be flushed to the disk
immediately. Considering the performance the log will be buffered and
flushed to disk every 60 seconds by default. Please wait several minutes to
make sure that the log has not been added.
3. If you still cannot see the log using my code please tell me the
operating system you'd using and I'll try to reproduce it again in the same
environment.
Actually, as far as I know, IIS will log all the requests unless a
component in IIS has crashed, which happens uncommonly. I am looking
forward to your test result.
Regards,
Allen Chen
Microsoft Online Support
--------------------
| Thread-Topic: Missing Web log Entry's for file downloads using ashx
| thread-index: AckIWKbuG7vlRWcvRveDaY7wru6RMQ==
| X-WBNR-Posting-Host: 207.46.192.207
| From: =?Utf-8?B?QU9UWCBTYW4gQW50b25pbw==?= <
[email protected]>
| References: <
[email protected]>
<
[email protected]>
| Subject: RE: Missing Web log Entry's for file downloads using ashx
| Date: Wed, 27 Aug 2008 08:22:00 -0700
| Lines: 201
| Message-ID: <
[email protected]>
| MIME-Version: 1.0
| Content-Type: text/plain;
| charset="Utf-8"
| Content-Transfer-Encoding: 7bit
| X-Newsreader: Microsoft CDO for Windows 2000
| Content-Class: urn:content-classes:message
| Importance: normal
| Priority: normal
| X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.3119
| Newsgroups: microsoft.public.dotnet.framework.aspnet
| Path: TK2MSFTNGHUB02.phx.gbl
| Xref: TK2MSFTNGHUB02.phx.gbl
microsoft.public.dotnet.framework.aspnet:74747
| NNTP-Posting-Host: tk2msftibfm01.phx.gbl 10.40.244.149
| X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet
|
| Hi,
| I am using IIS6, and you are correct, it is not logging the request to
the
| .ashx when a file is returned to the user (i.e. good credentials and file
| requested exists); this executes the part of the if containing the
| transmitfile method call. However, a request IS logged if the user
requests
| a file that doesn't exist or they provide invalid credentials (basically
any
| logic path that doesn't include the transmitfile method call). It would
| appear that the inherited class doing the logging to the web log isn't
when
| the transmitfile method is called. It does the same thing whether I use
IE
| or WGet.
| Thanks.
| "Allen Chen [MSFT]" wrote:
|
| > Hi,
| > Based on my understanding you created an HttpHandler to handle the
request
| > to .ashx, check the user's right and send the file back. But I'm not
sure
| > what do you mean by "but the W3SVC IIS log has nothing". Do you mean
the
| > request to .ashx is not logged?
| > I created a new HttpHandler to test it and it works fine. Here's my
code:
| > In Web.Config:
| > <httpHandlers>
| >
| > <add verb="*" path="*.ashx" type="LogComponent.MyHandler" />
| > MyHandler.vb:
| > Namespace LogComponent
| >
| > Public Class MyHandler
| > Implements IHttpHandler
| > Public Sub ProcessRequest(ByVal ctx As HttpContext)
| > 'do something
| > response.Write("Your access is registered in my server !")
| > End Sub
| > Public ReadOnly Property IsReusable() As Boolean
| > Get
| > Return True
| > End Get
| > End Property
| > End Class
| >
| >
| > End Namespace
| >
| > I deployed the web application on IIS 5.1. The log path is
| > C:\WINDOWS\system32\Logfiles. I checked the log file in MSFTPSVC1
folder.
| > Each time when I access *.ashx there's a new entry added.
| >
| > Could you check if logging is enabled in IIS and the path is correct?
Can
| > you see the log when you access it in the browser directly instead of
using
| > WGet tool?
| >
| > If it still doesn't work could you tell me what version of IIS are you
| > using? It will help me to troubleshoot further.
| > Regards,
| > Allen Chen
| > Microsoft Online Support
| >
| > Delighting our customers is our #1 priority. We welcome your comments
and
| > suggestions about how we can improve the support we provide to you.
Please
| > feel free to let my manager know what you think of the level of service
| > provided. You can send feedback directly to my manager at:
| > (e-mail address removed).
| >
| > ==================================================
| > Get notification to my posts through email? Please refer to
| >
http://msdn.microsoft.com/subscriptions/managednewsgroups/default.aspx#notif
| > ications.
| >
| > Note: The MSDN Managed Newsgroup support offering is for non-urgent
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| > where an initial response from the community or a Microsoft Support
| > Engineer within 1 business day is acceptable. Please note that each
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| > up response may take approximately 2 business days as the support
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| >
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| > ==================================================
| > This posting is provided "AS IS" with no warranties, and confers no
rights.
| >
| > --------------------
| > | Thread-Topic: Missing Web log Entry's for file downloads using ashx
| > | thread-index: AckHqFrM373Es0nmSI69ThkADoUrnA==
| > | X-WBNR-Posting-Host: 207.46.193.207
| > | From: =?Utf-8?B?QU9UWCBTYW4gQW50b25pbw==?= <
[email protected]>
| > | Subject: Missing Web log Entry's for file downloads using ashx
| > | Date: Tue, 26 Aug 2008 11:20:01 -0700
| > | Lines: 87
| > | Message-ID: <
[email protected]>
| > | MIME-Version: 1.0
| > | Content-Type: text/plain;
| > | charset="Utf-8"
| > | Content-Transfer-Encoding: 7bit
| > | X-Newsreader: Microsoft CDO for Windows 2000
| > | Content-Class: urn:content-classes:message
| > | Importance: normal
| > | Priority: normal
| > | X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.3119
| > | Newsgroups: microsoft.public.dotnet.framework.aspnet
| > | Path: TK2MSFTNGHUB02.phx.gbl
| > | Xref: TK2MSFTNGHUB02.phx.gbl
| > microsoft.public.dotnet.framework.aspnet:74661
| > | NNTP-Posting-Host: tk2msftibfm01.phx.gbl 10.40.244.149
| > | X-Tomcat-NG: microsoft.public.dotnet.framework.aspnet
| > |
| > | Hi,
| > |
| > | I have been using the code (some of it has been removed for
simplicity)
| > | below to allow authenticated (using ASP.NET membership database)
users to
| > get
| > | a file from their archive area. It seems to work fine, however I
noticed
| > | that no web log entry is added when a successful download occurs
| > (normally a
| > | 200 HTTP status code, however, if there is an authorization failure,
it
| > gets
| > | logged). I have a logging routine that logs a successful download to
a
| > | database, but the W3SVC IIS log has nothing. The code below is
contained
| > in
| > | an .ashx file. One other thing to note, I have added MADAM to the
web
| > | application, to allow for basic authentication (they might use WGET
to
| > | download archives, instead of the web forms).
| > |
| > | Thanks.
| > |
| > | Public Class GetArchive : Implements IHttpHandler
| > | Public Sub ProcessRequest(ByVal context As HttpContext)
Implements
| > | IHttpHandler.ProcessRequest
| > | Dim strFileName As String = String.Empty
| > | Dim blnTransmittingFile As Boolean = False
| > | Try
| > | context.Response.Buffer = True
| > | If context.User.Identity.IsAuthenticated = True Then
| > | strFileName = context.Request.QueryString("file")
| > | If String.IsNullOrEmpty(strFileName) = False Then
| > | strFileName =
System.IO.Path.GetFileName(strFileName)
| > | context.Response.Clear()
| > |
| > | Dim objFileInfo As New
System.IO.FileInfo(strFileName)
| > | Dim intFileSize As Long = 0
| > |
| > | If objFileInfo IsNot Nothing Then
| > | intFileSize = objFileInfo.Length
| > | End If
| > |
| > | context.Response.StatusCode = 200
| > | context.Response.ContentType = "application/zip"
| > | context.Response.AddHeader("Content-Disposition",
| > | "attachment; filename=" + strFileName)
| > | context.Response.AddHeader("Content-Length",
| > | intFileSize.ToString())
| > |
| > | If context.Request.HttpMethod <> "HEAD" Then
| > | Dim dtStart As DateTime = Now()
| > | Dim dtFinish As DateTime
| > | Dim tsTimeTaken As TimeSpan
| > | context.Response.SuppressContent = False
| > | context.Response.Buffer = False
| > | context.Response.BufferOutput = False
| > | blnTransmittingFile = True
| > | context.Response.TransmitFile(strFileName, 0,
-1)
| > | context.Response.Flush()
| > | context.Response.Close()
| > | dtFinish = Now()
| > | tsTimeTaken = dtFinish - dtStart
| > | EventLogger.LogDownloadEvent(strFileName,
| > | strUserName, tsTimeTaken.TotalSeconds)
| > | End If
| > | Else
| > | context.Response.Clear()
| > | context.Response.ContentType = "text/plain"
| > | context.Response.StatusCode = 404
| > | context.Response.Write("File Not Found")
| > | End If
| > | End If
| > |
| > | Catch ex As Exception
| > | If blnTransmittingFile = False Then
| > | context.Response.Clear()
| > | context.Response.ClearContent()
| > | context.Response.ClearHeaders()
| > | context.Response.ContentType = "text/plain"
| > | End If
| > | context.Response.StatusCode = 403
| > | context.Response.Write("Request failed [" + ex.ToString()
+
| > "]")
| > | EventLogger.LogDownloadEvent("Failed", ex.ToString())
| > | End Try
| > | End Sub
| > |
| > | Public ReadOnly Property IsReusable() As Boolean Implements
| > | IHttpHandler.IsReusable
| > | Get
| > | Return False
| > | End Get
| > | End Property
| > | End Class
| > |
| > |
| >
| >
|
