Hi Paul, > On Mar 19, 2015, at 1:18 PM, Paul Wiseman <poal...@gmail.com> wrote: > > I have some blocking going on in a custom twisted ftp server and I'm > trying to pin point what exactly is doing it. > > I think this line in openForReading on my FTPShell object could be the > culprit: > > _FileReader(urllib2.urlopen(result.link,timeout=settings.GLOBAL_TIMEOUT)) >
Yeah, urllib2.urlopen() blocks, so this is at least one place in your code that will cause you a problem. > (_FileReader is twisted.protocols.ftp._FileReader and result.link a url > string) > > I'm guessing urllib2.urlopen blocks resolving the domain and > connecting? What would be the twisted equivalent way of providing a > file like object of the download stream to the FileReader that > wouldn't block? > You probably want to use twisted.web.client.Agent for this, as it allows you to perform non-blocking http requests. If you can live with buffering the http response body into, say, a tempfile or an io.BytesIO instance, then you can just pass that to _FileReader as the fObj argument and call it a day. Hope this helps, -- L. Daniel Burr _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
