On Wed, Jul 14, 2010 at 02:26:55PM +0800, ±¦Öì wrote:
> When interface comes back, it will always use the previous address. But the
> transfer does not resume more than one day.(One day is my longest test period).
>  
> I have used the CONNECTTIMEOUT and FTP_RESPONSE_TIMEOUT option.

I don't know why it would fail in this case, unless the server gets some
kind of indication that the network link on the client went down and
terminates the TCP connection without the client noticing. You could
also try installing a CURLOPT_SOCKOPTFUNCTION and enabling TCP keepalive on
the socket, like the curl --keepalive-time option does.

>>> Dan

>
>  
> 2010/7/14 Dan Fandrich <dan_at_coneharvesters.com>
>
> On Wed, Jul 14, 2010 at 11:43:58AM +0800, ±¦Öì wrote:
> > I am using curl-7.18.2-6.fc10(libcurl.so.4.1.0)  in linux
> > 2.6.21.7-hrt1-WR2.0ap_standard #1 PREEMPT.
> >  
> > I invoked a get file transfer job, before it completes the download job,
> there
> > is a network interface down event, but this only last several seconds.
> > After the network interface being up again, the download job can not
> > continue, even no exception happens when the network interface is down.
> >  
> > The download job just hangs there and block my other process.
> >  
> > Is it a well-konw problem? Is it already fixed? Have you recognized it? 
> >  
> > Do you know how to make a workaround for that or how fix?
>
> If the network interface comes back up with a new address, then the
> existing
> connection will no longer be able to continue and it will eventually time
> out (which could take 20 minutes). If the interface comes back with the
> same
> address as before, the transfer ought to resume within a few seconds or at
> most a few minutes.  You can use the CURLOPT_LOW_SPEED_LIMIT and
> CURLOPT_LOW_SPEED_TIME options to force an abort more quickly than TCP
> would
> normally do it, and/or just retry the transfer (an equivalent to the curl
> tool's --retry option) to redo the transfer once it fails.
>
> >>> Dan
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Received on 2010-07-14