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Hi,all.
I'm on a toy ftp project and I want it to be convinient for the user
to cancel an undergoing downloading while continue others. The
following code explains:
for file in download_files:
self.ftp.retrbinary('RETR '+file, fileHandler)
Thers seems not a solid way to cancel this transfer and I considered
thread or process but I can't handle this correctly.
Thread: I can't kill the thread in another thread, so...
Process: There seems something wrong(raise an EOFError exception) when
I use Process(target = download_fun, args = (dir,)) for each
downloading after connection built.
Some suggestions?

nemo wrote:
> Hi,all.
> I'm on a toy ftp project and I want it to be convinient for the user
> to cancel an undergoing downloading while continue others. The
> following code explains:
> for file in download_files:
> self.ftp.retrbinary('RETR '+file, fileHandler)
> Thers seems not a solid way to cancel this transfer and I considered
> thread or process but I can't handle this correctly.
> Thread: I can't kill the thread in another thread, so...
> Process: There seems something wrong(raise an EOFError exception) when
> I use Process(target = download_fun, args = (dir,)) for each
> downloading after connection built.
> Some suggestions?

How about

for file in download_files:
try:
self.ftp.retrbinary('RETR %s' % file, fileHandler)
except KeyboardInterrupt:
print file, "transfer abandoned"

Then you can cancel a single file transfer with Ctrl/C.

regards
Steve
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/

On Dec 29, 12:31*pm, Steve Holden <st...@holdenweb.com> wrote:
> nemo wrote:
> > Hi,all.
> > I'm on a toy ftp project and I want it to be convinient for the user
> > to cancel an undergoing downloading while continue others. The
> > following code explains:
> > for file in download_files:
> > * * self.ftp.retrbinary('RETR '+file, *fileHandler)
> > Thers seems not a solid way to cancel this transfer and I considered
> > thread or process but I can't handle this correctly.
> > Thread: I can't kill the thread in another thread, so...
> > Process: There seems something wrong(raise an EOFError exception) when
> > I use Process(target = download_fun, args = (dir,)) for each
> > downloading after connection built.
> > Some suggestions?
>
> How about
>
> for file in download_files:
> * * try:
> * * * * self.ftp.retrbinary('RETR %s' % file, fileHandler)
> * * except KeyboardInterrupt:
> * * * * print file, "transfer abandoned"
>
> Then you can cancel a single file transfer with Ctrl/C.
>
> regards
> *Steve
> --
> Steve Holden * * * *+1 571 484 6266 * +1 800 494 3119
> Holden Web LLC * * * * * * *http://www.holdenweb.com/

Thanks your advice,
actually, this ftp has a GUI interface, so I'm considering the
downloading part in another process or thread, whick is s a tricky
part for me to design.