Re: Timeout in FTP Operations

[Scott Klement <sk@xxxxxxxxxxxxxxxx>]

Sender: Scott Klement <sk@xxxxxxxxxxxxxxxx>


Hi Brian,

If you set a timeout on FTP_conn() or FTP_open(), FTPAPI will remember 
that timeout value and use it as the timeout value for file transfers as 
well.

However, it doesn't appear to do any timeout checks when connecting to or 
accepting data channels. It only does the timeout checks on the initial 
control channel and on send/recv calls.  Also, it written using blocking 
sockets with select() to detect timeouts, and that method isn't foolproof. 
It should be changed to either use non-blocking sockets (like HTTPAPI 
does) or to use signals.

Unfortunately I don't have time to work on it. (Though, I wish I did. 
FTPAPI and HTTPAPI are definitely more fun to work on than my job!)


On Tue, 26 Apr 2005, Brian Eckenrod wrote:

> Apologies if this is in the archives, I tried to get to them today, but
> the site seems to be down.
>
> We are using the latest beta version of the API to do some file transfers.
> We are using the timeout parameter on the FTP connection to trap if the
> connection is never made and that works well.  What seems to be missing or
> that I am overlooking is a timeout on the file transfer portions of the
> API.  We've had a receive of a file hang a few times for no obvious reason
> and the API never times out or errors, the job just seems to sit there
> until someone notices it.
>
> Is there something I am missing or something I could do to utilize a
> timeout in the file transfer aspects of the API or perhaps across the
> entire API on all operations so that if any of them take beyond x minutes
> they fail and I can trap the error and react to it.
>
> Thanks in advance for any help / insight.
>
> Brian
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