Strange File Upload issue with asp.net site on a web farm
- by Coov
I have a basic asp.net file upload page. When I test file uploads from my local machine, it works fine. When I test file uploads from our dev machine, it works fine. When I deploy the site to our production webfarm, it behaves strangely.
If I access the site from off the network, I can load file-after-file without issue. If I access the site from within our network, I can load the first file just fine but any subsequent files result it a bad sequence of commands error.
I'm not sure if this is web farm issue, a network issue, or something else. It feels like a connection is not being disposed of properly but it doesn't make sense why everything works fine remotely.
Markup:
<asp:FileUpload ID="FileUpload1" runat="server" Width="350px" />
<asp:Button ID="btnSubmit" runat="server" Text="Upload" onclick="btnSubmit_Click" />
Code:
if (FileUpload1.HasFile)
{
FtpWebRequest ftpRequest;
FtpWebResponse ftpResponse;
ftpRequest = (FtpWebRequest)FtpWebRequest.Create(new Uri("ftp://ftp.myftpsite.com/" + FileUpload1.FileName));
ftpRequest.Method = WebRequestMethods.Ftp.UploadFile;
ftpRequest.Proxy = null;
ftpRequest.UseBinary = true;
ftpRequest.Credentials = new NetworkCredential("username", "password");
ftpRequest.KeepAlive = false;
byte[] fileContents = new byte[FileUpload1.PostedFile.ContentLength];
using (Stream fr = FileUpload1.PostedFile.InputStream)
{
fr.Read(fileContents, 0, FileUpload1.PostedFile.ContentLength);
}
using (Stream writer = ftpRequest.GetRequestStream())
{
writer.Write(fileContents, 0, fileContents.Length);
}
ftpResponse = (FtpWebResponse)ftpRequest.GetResponse();
Response.Write(ftpResponse.StatusDescription);
}
