FtpWebRequest doing a CWD in addition to PWD, with extra "/"

microsoft.public.dotnet.framework

15 Oct 2007 10:57 PM

Eugene

Hi,
I am not sure if anyone has encountered the same problem and know the
answer...

When I set an FtpWebRequest to do PWD with the following code,
_FtpWebRequest.Method = WebRequestMethods.Ftp.PrintWorkingDirectory;
_FtpWebResponse = (FtpWebResponse)_FtpWebRequest.GetResponse();

the trace showed that FtpWebRequest also does a CWD, as shown in the
following trace:

System.Net Information: 0 : [3756] FtpControlStream#33163964 - Sending
command [PWD]

System.Net Information: 0 : [3756] FtpControlStream#33163964 - Received
response [257 "*.*/*" is the current directory]

System.Net Information: 0 : [3756] FtpControlStream#33163964 - Sending
command [CWD *.*/*/]

System.Net Information: 0 : [3756] FtpControlStream#33163964 - Received
response [550 Invalid directory.]

As you can see from the last two lines of trace, the framework performs an
CWD with and extra "/" which makes the server throw a 550 error.

Another related issue is that the framework seems to treat "*.*/*" in the
above example as the root directory so when I specify a remote directory,
FtpWebRequest fwr =
(FtpWebRequest)WebRequest.Create("ftp://usa.ftptls.edisrvcs.com/GXS.U9999443");
where "GXS.U9999443" is the directory, the trace showed that .NET try to
change to the directory under "*.*/*" with a "CWD *.*/*/gxs.u9999443" ,
instead of just simply change to that directory with the command "CWD
gxs.u9999443" thus an error occurs:

System.Net Information: 0 : [4352] FtpControlStream#2637164 - Received
response [257 "*.*/*" is the current directory]
System.Net Information: 0 : [4352] FtpControlStream#2637164 - Sending
command [CWD *.*/*/GXS.U9999443]

Has anyone encountered the same issue and how did you resolve it?

Thanks!!!

Eugene

19 Oct 2007 5:12 PM

Eugene

By modifying the URI to ftp://usa.ftptls.edisrvcs.com//GXS.U9999443 (note the
extra slash between the server address and the remote directory) I was able
to avoid the problem of .NET CWD into *.*/*/gxs.u9999443. However, .NET is
still adding an extra slash in front, performing a CWD /EGXS.U9999443 and the
server is still throwing me a [550 Invalid directory.].

Does anyone know how I can get .NET to do nothing but a simple
[CWD EGXS.U9999443]?

Thanks,

Eugene

Show quote

"Eugene" wrote:

> Hi,
> I am not sure if anyone has encountered the same problem and know the
> answer...
>
> When I set an FtpWebRequest to do PWD with the following code,
> _FtpWebRequest.Method = WebRequestMethods.Ftp.PrintWorkingDirectory;
> _FtpWebResponse = (FtpWebResponse)_FtpWebRequest.GetResponse();
>
> the trace showed that FtpWebRequest also does a CWD, as shown in the
> following trace:
>
> System.Net Information: 0 : [3756] FtpControlStream#33163964 - Sending
> command [PWD]
>
> System.Net Information: 0 : [3756] FtpControlStream#33163964 - Received
> response [257 "*.*/*" is the current directory]
>
> System.Net Information: 0 : [3756] FtpControlStream#33163964 - Sending
> command [CWD *.*/*/]
>
> System.Net Information: 0 : [3756] FtpControlStream#33163964 - Received
> response [550 Invalid directory.]
>
> As you can see from the last two lines of trace, the framework performs an
> CWD with and extra "/" which makes the server throw a 550 error.
>
> Another related issue is that the framework seems to treat "*.*/*" in the
> above example as the root directory so when I specify a remote directory,
> FtpWebRequest fwr =
> (FtpWebRequest)WebRequest.Create("ftp://usa.ftptls.edisrvcs.com/GXS.U9999443");
> where "GXS.U9999443" is the directory, the trace showed that .NET try to
> change to the directory under "*.*/*" with a "CWD *.*/*/gxs.u9999443" ,
> instead of just simply change to that directory with the command "CWD
> gxs.u9999443" thus an error occurs:
>
> System.Net Information: 0 : [4352] FtpControlStream#2637164 - Received
> response [257 "*.*/*" is the current directory]
> System.Net Information: 0 : [4352] FtpControlStream#2637164 - Sending
> command [CWD *.*/*/GXS.U9999443]
>
> Has anyone encountered the same issue and how did you resolve it?
>
> Thanks!!!
>
> Eugene