File download with ASp

Posted on 2011-03-03
Last Modified: 2012-05-11
I am using the following code to allow signed-in users to download a pdf. The download works but then adobe reports that the file is damaged. NOTE: the file on the server is NOT damaged - the corruption seems to occur during download.

leadno = request("leadno")
filename =  "OBS"   & leadno & ".pdf"

strFilePath = "D:\inetpub\vhosts\xxxxxxxxxx\httpsdocs\observations\"   & filename
Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
If objFSO.FileExists(strFilePath) Then
Set objFile = objFSO.GetFile(strFilePath)
intFileSize = objFile.Size
Set objFile = Nothing

strFileName = filename
strFileName = replace(filename," ","-")
Response.AddHeader "Content-Disposition","attachment; filename=" & strFileName

Response.ContentType = "application/x-msdownload"
Response.AddHeader "Content-Length", intFileSize

Set objStream = Server.CreateObject("ADODB.Stream")
objStream.Type = 1 'adTypeBinary
objStream.LoadFromFile strFilePath
Do While Not objStream.EOS And Response.IsClientConnected
Response.BinaryWrite objStream.Read(1024)
Set objStream = Nothing
Response.write "...Error finding file."
Response.write "..Error finding file."
End if
Set objFSO = Nothing
Question by:cdjohn31
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 3
  • 2
LVL 14

Expert Comment

ID: 35026250
Put this as content type:

Response.ContentType = "application/pdf"

Open in new window

LVL 14

Expert Comment

ID: 35026259
To force download, put this:

Response.ContentType = "application/octet-stream"

Open in new window


Author Comment

ID: 35027708
I have tried both of these - same result
Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

LVL 14

Expert Comment

ID: 35027830
Are those download files bigger or smaller then original ones? What is their size after download?


Author Comment

ID: 35047108
The size on the server and after download are identical
LVL 28

Accepted Solution

sybe earned 500 total points
ID: 35055943
Your code supposes that the file has a size that is an exact multiple of 1024 bytes. That is probably not the case.

I use a function as below.
Sub WriteFileToBrowser(ByVal sFilePath, ByVal sContentType, ByVal sDisplayName)
    Dim oStream, bBuffer, iFileSize, iChunk, i

    Response.Buffer = False
    Server.ScriptTimeout = 30000
    iChunk = 64000

    Set oStream = Server.CreateObject("ADODB.Stream")
    oStream.Type = 1
    oStream.LoadFromFile sFilePath
    iFileSize = oStream.Size

    Response.ContentType = sContentType
    Response.AddHeader "Content-Disposition", "filename=" & sDisplayName
    Response.AddHeader "Content-Length", oStream.Size

    For i = 1 To iFileSize \ iChunk
        If Not Response.IsClientConnected Then Exit For
        Response.BinaryWrite oStream.Read(iChunk)

    If iFileSize Mod iChunk > 0 Then
        If Response.IsClientConnected Then
            Response.BinaryWrite oStream.Read(iFileSize Mod iChunk)
        End If
    End If
    Set oStream = Nothing
End Sub

Open in new window


Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Cognitive Services 1 74
Adobe Connect eLearning pricing 2 44
Find fonts in Word 2010 32 73
Is there a way to have Acrobat Pro XI open with a custom tool set? 3 45
Update 21-May-2015: I temporarily removed the source code and the code snippets to make major changes to the program. Regards, Joe INTRODUCTION This Article is a follow-up to the Article entitled How To Rename-Move a Batch of PDF Files Based o…
PDF files have been in the limelight due to its unmatched features.  Personal documents, emails, business reports and eBooks are all converted into PDF files owing to peerless features provided by it. Adding watermark to a PDF file is a method to se…
In this video, we show how to perform Bates Numbering/Stamping of PDF documents using Power PDF Advanced, the newest product from the Document Imaging division of Nuance Communications. There are two editions of Power PDF — Standard and Advanced. Th…
In this fourth video of the Xpdf series, we discuss and demonstrate the PDFinfo utility, which retrieves the contents of a PDF's Info Dictionary, as well as some other information, including the page count. We show how to isolate the page count in a…

732 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question