Download from Web Folder Fails Based on File Type

[JDRaven]

(also posted under webdevelopment-inetserver-iis newsgroup, not sure which is
most appropriate)

We have a Windows Forms app that has been successfully running for several
months. Part of the app checks for certain file updates from a web folder at
login time and downloads any component updates that are needed. There are
about 15 files of different types that could be downloaded, including .rtf,
..ppt, .xls, .exe and .mdb extensions.

Now they are making us migrate to a new box with a new address. Only change
I should have to make is the pointer to the web address of the server-based
file. File names themselves have not changed.

Now when the code runs to check for updates and download needed components
from the new location, the program properly identifies which pieces are
needed, but some of the downloads fail with Error (400) Bad Request, while
others succeed as they used to. What I have been able to determine is that
the .exe, .mdb, and .rtf files are downloading successfully, while the .xls
and .ppt files are generating the error.

Following is the VB.NET code that executes the individual downloads
(successfully on the old box, only partially successfully on the new box):

Dim RequestAnnounce ments As System.Net.Http WebRequest =
CType(System.Ne t.WebRequest.Cr eate(cRow.Item( "ItemServerLoca tion") &
cRow.Item("Item ServerFileName" )), System.Net.Http WebRequest)
Dim myCacheAnnounce ments As New System.Net.Cred entialCache
myCacheAnnounce ments.Add(New
Uri("https://our.authenticat ionservernamego eshere.com/"), "Basic", New
System.Net.Netw orkCredential(s trUserID, strUserPassword ))
RequestAnnounce ments.Credentia ls = myCacheAnnounce ments
RequestAnnounce ments.CookieCon tainer = New System.Net.Cook ieContainer
httpresponse = RequestAnnounce ments.GetRespon se()

When this last stmt executes is when the error is thrown (within a Try-Catch
block).

Any idea why some of the files, all from the same folder, are successfully
downloaded while others generate the error?

Thanks for your support!

[[MSFT]]

Hello,

You may download the file diretly in IE to see if would work. If it still
didn't work, you can check if there is any configration on the IIS has been
changed and block the download.

Since this group is for webservice. I suggest you may focus on the message
you post in IIS group. Hope youare luck to find someon can help you there.

Luke

[JDRaven]

Root cause was determined to be spaces in the file names, and not the
associated file type. Microsoft has posted this issue with fixes, and I'm
having our admins check that all patches applied to our old machine have been
applied to the new machine. Interim step of removing the spaces from the
file names has provided a work-around. Thanks!

"[MSFT]" wrote:

Hello,

You may download the file diretly in IE to see if would work. If it still
didn't work, you can check if there is any configration on the IIS has been
changed and block the download.

Since this group is for webservice. I suggest you may focus on the message
you post in IIS group. Hope youare luck to find someon can help you there

[[MSFT]]

Thank you for the update. I am very glad to hear you had have a work around
for the problem.

Luke