problem with downloading zip-files from webserver ;-)

vincentmultimedia · #1 (**permalink**) 03-11-06, 09:37 AM

hi to all,

i have the following problem:
working on a "downlad-module" within a larger website, i tried several methods for downloading-files to the user.
mabye some basic infos first:
the website runs on win server 2003, using sql server 2000-database; pages are written in classic asp.
the idea behind is, that all possible download-files (flyers, brochures, some it-stuff.. means pdf, docs, exe, zip-files.. "standard-mixed-stuff, i would say) are of course stored outside the website-root and are uploaded using a cms.
for each file, the information is stored in a database (not the file itself). beside path and filename, also content-type, descriptiton, user-restrictions etc.

within the page, the user will than receive a list of possible download files.
by clicking on the link, i redirect to a "download.asp"-page, where i just want to start the download by sending the file to the user.
so far - so bad :-)

i tried 2 free components (TabsUpload; aspSmartUpload)and also a simple response.BinaryWrite
and here´s the problem: everything works fine, as long as i am messing round with other file formats than ZIP (!)
i can use the system for downloading pdfs, exe, docs... but when i want to dl a zip-file, the system "hangs up" (only the browser wants to connect endlessly.. its not a crash, because i can stop it by using ESC-key)

one interesting thing:
when i use the the BinaryWrite-method, a file is downloaded - but of course not the zip file - it is a html-page with the wrong content-type ;-)
using a text/hex-editor, you can find this error message:
Response Buffer Limit Exceeded

possible solution for this would normaly be, to turn
Response.Buffer = False
but, for using either binaryWrite or one of the components, Response.Buffer should be set to True, as far as i know...

so anyway, here is the source-code:

Code:

<%@ LANGUAGE=VBscript%>
<% OPTION EXPLICIT %>
<% Response.Buffer = True %>
<!--#include file="../include/config.inc.asp" -->
<!--#include file="../include/secure.inc.asp" -->

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>
<head>
	<!--#include file="../include/head.inc.asp" -->
</head>
</body>
</html>

<%

'get uid for download
	dim uid
	uid = replace(request("file"),"'","")
	if uid = "" then response.redirect "download.asp?error=1" 'no uid

get some information, like filnema and filpath form the database
'[.... cutted of  ...]


Response.Clear
Response.Expires = 0

Dim mySmartUpload
Set mySmartUpload = Server.CreateObject("aspSmartUpload.SmartUpload")

'this one is working fine:
'Call mySmartUpload.DownloadFile("e:\Inetpub\wwwroot\file_to_download.pdf","application/x-zip-compressed","myfile.pdf")

'having only problems with this stuff:
Call mySmartUpload.DownloadFile("e:\Inetpub\wwwroot\file_to_download.zip","application/x-zip-compressed","myfile.zip")

%>

the file sizes of the demo-downloads is something betwenn 1 und 5 MBytes; some original files could exceed up to max. 250 MByte (xpress-layout for coustomers)

any ideas?
can you help me on this?

thanks in advance
juergen

Phoenix_Riser · #2 (**permalink**) 03-22-06, 05:16 AM

Can I suggest trying PDF?