Question

I have just upgraded an application from net 3.5 to 4.0

I read and transfer files using ftp. An everything is great except for one of the servers I connect to. That server is strange to begin with as I have to go back one directory and down into another:

“ftp.server.com” actually puts me in http://ftp.server.com/up, and I need to read from http://ftp.server.com/out

I get a filelist using this url:

ftp://ftp.server.com/%2fout

Web request is created this way:

var request = (FtpWebRequest) WebRequest.Create("ftp://ftp.server.com/%2fout");

I get the filelist – no problem, so that method works for connecting to the directory, but when trying to read one of the files i now get an error.

I create that request this way:

 var request = (FtpWebRequest)WebRequest.Create("ftp://ftp.server.com/%2fout/" + filename);

I have logged the URI of the request to be:

ftp://ftp.server.com//out/ORDER25260.xml_XL1014254ORDER25260_response.xml

I get this stacktrace:

The remote server returned an error: (550) File unavailable (e.g., file not found, no access).   at System.Net.FtpWebRequest.CheckError()
   at System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
   at System.IO.Stream.Close()
   at System.Net.ConnectionPool.Destroy(PooledStream pooledStream)
   at System.Net.ConnectionPool.PutConnection(PooledStream pooledStream, Object owningObject, Int32 creationTimeout, Boolean canReuse)
   at System.Net.FtpWebRequest.FinishRequestStage(RequestStage stage)
   at System.Net.FtpWebRequest.SyncRequestCallback(Object obj)
   at System.Net.CommandStream.Abort(Exception e)
   at System.Net.CommandStream.CheckContinuePipeline()
   at System.Net.FtpDataStream.System.Net.ICloseEx.CloseEx(CloseExState closeState)
   at System.Net.FtpDataStream.Dispose(Boolean disposing)
   at System.IO.Stream.Close()
   at CustomModules.CustomModules.SupplierFunctions.FtpMethods.GetFile(SynsamSupplierSetting setting, String filename, Boolean deleteAfterLoad) in D:\WORK\dynamicweb\Source\CustomModules\SupplierFunctions\FtpMethods.cs:line 295

I have noproblem downloading via FileZilla using same credentials

Any idea?

Thanks in advance

Answer 1

Resolved this using information on this thread:

550 file unavailable error with FtpWebRequest class file upload. Works fine in FileZilla

User SteveCalPoly writes:

apparently the CWD command behavior changed in the move from .NET 3.5
to 4.0.

You have to first call the method in this link.

http://support.microsoft.com/kb/2134299

The question relates to uploads, so I missed it in my first google for answers