We have set up an application of IIS 6.0 with standard compression for both
static and dynamic pages. The compression works fine. However, we have one
page which does a postpack to serve (download) files for users.

If the file being downloaded is a zip file and the user is using IE 6.0, a
file is downloaded but when the user goes to open the file they recieve the
message that the zip folder is "is invalid or corrupted". The file
sucessfully downloads and opens when using other browsers such as FireFox.

This problem does not occur for any other file type. It does not occur when
dynamic compression is turned off.

(I did post a similar query some months ago where a member suggested they
would be able to review the problem with further detail, however the link I
received to the query
http://www.microsoft.com/technet/community/newsgroups/dgbrowser/en-us/default.mspx?dg=microsoft.public.inetserver.iis&mid=ae7e0b03-8efb-40a9-a26b-bc983ebdaf58 no longer locates the issue).

Any ideas how to solve this issue of dynamic compress in IIS for zip files
being served using an aspx page and read using IE 6.0?

Re: Dynamic compression for a aspx page serves corrupt zip files. by JonathanPalmer

JonathanPalmer
Thu Mar 23 12:31:32 CST 2006

Can you go to
http://intl.wcs.org/portal/Home/Transfer/tabid/332/EntryId/30153/DMXModule/1389/Default.aspx and use the download link to review?

You will see it downloads OK using Firefox but fails with IE 6.0

Thanks

Jonathan

"David Wang [Msft]" wrote:

> Here's the last thread I have of the issue.
>
> I could not browse the exact response of your test case to distinguish
> between the five possible failure possibilities that I was contemplating.
>
> --


David