issuing FTP commands (ABOR)

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Jportelas - 10 Mar 2005 22:47 GMT

Hi everyone:

I hope someone knows this one...

I'm programming a FTP client (in .NET 1.1) for a transferring files
application, everything works perfect when using the PASV passive mode, but
when I go on the PORT command, a STOR command starts to transfer a file but
when I close the data connection I get a "426 Connection closed; transfer
aborted." error, I've read that closing the connection should close the file
transfer and I should get a 226 response, but it doesn't seem to work. :(

By the way I close the socket using the socket.Close() method provided by
.NET.

Thanx for any help on this.

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A G - 12 Mar 2005 09:48 GMT

It sounds like you are closing the connection before the whole file gets
transfered , are you checking in your code to see if the file is still being
transfered before you close the connection something like :
while ((m_bytes = input.Read(m_buffer, 0, m_buffer.Length)) > 0)

good luck ,

Ahmed G .

> Hi everyone:
>
[quoted text clipped - 11 lines]
>
> Thanx for any help on this.

Reply to this Message

A G - 12 Mar 2005 10:18 GMT

Take a look at :

http://support.microsoft.com/default.aspx?scid=kb;en-us;832679

http://www.developer.com/net/vb/article.php/10926_3424121_2

both articles cover alot of details on ftp .

Good luck ,

Ahmed G.

> It sounds like you are closing the connection before the whole file gets
> transfered , are you checking in your code to see if the file is still

being

> transfered before you close the connection something like :
> while ((m_bytes = input.Read(m_buffer, 0, m_buffer.Length)) > 0)
[quoted text clipped - 18 lines]
>
> Thanx for any help on this.

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Jportelas - 18 Mar 2005 14:37 GMT

Hi Ahmed :

Thanks a lot for the reply.

I tried what you suggested and worked fine in some cases, I don't know why
but sometimes the listener socket seems not to be enough for the server to
connect, even if i Close it and open it everytime, it's really weird!

In fact I think my program will work only in passive mode, I also read
passive mode is the standard way to go when firewalls are involved...

Thanks for your time my friend.

Bye.

> Take a look at :
>
[quoted text clipped - 36 lines]
> >
> > Thanx for any help on this.

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issuing FTP commands (ABOR)

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