From: M.Wenzel <we...@gm...> - 2001-01-25 06:25:20
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Hi Ype, thanks for your detailed answer showing the background of the problem. Meanwhile I helped myself using the Java Telnet Application (JTA) within Jython: http://www.mud.de/se/jta/ You can use JTA for Telnet connections and SSH (with Cryptix), too. Highly recommandable! best regards, Markus ----- Original Message ----- From: "Ype Kingma" <yk...@xs...> To: "Markus Wenzel" <We...@gm...>; <jyt...@li...> Sent: Tuesday, January 23, 2001 8:58 PM Subject: Re: [Jython-dev] (no subject) > >Hello, > > > >where can I find module select. > >It's not in [My-Jython2.0-Dir]/Lib. > >I got an import error if I try to > >import this module. > >(I.E. it's used by module telnetlib). > >I have no problem with other Libs. > > A few days ago I checked briefly on the sockets that > Java makes available and this is what I found: > > The 'native' Java lib does not provide a select function, > so Jython cannot make use of it. The sockets that are there > only a allow to check whether sockets are ready for reading, > ie. you can get to the inputstream of a socket and ask > for the nr. of bytes it has available. However you can't > ask the socket's outputstream for the nr. of bytes it hasn't > written yet, you can only flush the outputstream. > Also there is no out of band data in Java, and for > exceptional things (like TCP/IP errors) happening to an > inputstream, you would have to catch the corresponding > exception from the socket first. > Read timeouts are there, and so is the TCP no delay option, > as well as a shutdown and lingering on close. Non blocking > reads can be done by using a very short time out. > You can't do non blocking writes IIRC. > > I still hope I didn't look close enough, though. > > > Regards, > Ype > |