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List:       kde-core-devel
Subject:    FTP question
From:       David Faure <david () mandrakesoft ! com>
Date:       2000-04-10 1:34:23
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Hi,
I need an FTP expert ;)
Short version: how to abort a download ('retr') ?

Long story:
I've been trying to implement Ftp::mimetype, i.e. downloading 
the first 2048 bytes of a file and then aborting the transfer,
since 2K should be enough to determine the mimetype of a file.

The code is almost the same as Ftp::get but it doesn't loop around FtpRead.
It simply does it once
  int n = ftpRead( buffer, 2048 );
  array.setRawData(buffer, n);
  data( array );
  array.resetRawData(buffer, n);

and then tries to close the command (ftpCloseCommand, which closes
the data sockets). While this works, it seems it's enough to get
a message from the remote server.
So if we try to read the usual message that is sent after a command,
it fails. But if we _don't_ try to read it, it's not better. The next
command doesn't work either. In both cases, ftpReadLine() gives
"read failed", i.e. nothing to read.

Does anyone know a way to abort a FTP transfer ?

BTW, shutdown() is closed on the socket before close()... One
would think this is enough to make the data transfer abort, no ?


PS: other solution would be to store the data and use it for the Ftp::get
that most probably follows, i.e. not aborting the transfer.... Hmm...

-- 
David FAURE, david@mandrakesoft.com, faure@kde.org
http://home.clara.net/faure/
KDE, Making The Future of Computing Available Today
See http://www.kde.org/kde1-and-kde2.html for how to set up KDE 2

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