In article <cae_hg6bdail_huf1d7zfiggv-fgxtdqsriq2rt44taqweib...@mail.gmail.com>, Laurens Van Houtven <_...@lvh.cc> wrote:
> On Thursday, July 12, 2012, Russell E. Owen wrote: > > > I'm adding Twisted support to some existing communication code and I > > have a few questions which I hope are simple. I've been reading the API > > documentation, but if the answers are there I'm missing them. > > > > What happens if one tries to write to a protocol.transport that is not > > connected or in an error state? (I'm hoping that this case has defined > > behavior and that it will raise an exception). > > > Not connected usually means that protocol.transport is None > > > > > > Is there some way to query a protocol to see if it is in a good state > > (connected and no errors)? I realize with callbacks this is not usually > > necessary, but I have a case where it would be helpful (though I can > > probably manage without it). > > Can you elaborate on the case? I've found that Twisted sometimes swallows errors unless I am extremely careful. I would like to be able to check a protocol to make sure it is operational (connected and happy) as a means of assuring that I've not missed an error. > > When reading raw bytes, is there any way to get the bytes from the > > protocol? I assume not: that if one wants to buffer the data one must do > > that in the callback. If so, does Twisted provide a suitable buffer > > class? > > The protocol gets dataReceived called. What kind of buffering do you want > to do and why? Would a simple StringIO suffice? I read the LineReceiver code (should have done that before asking) and realize it's buffering using a simple string. I just rewrote that simple class to meet my needs and am quite happy. -- Russell _______________________________________________ Twisted-Python mailing list Twisted-Python@twistedmatrix.com http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
