[Twisted-Python] problems with transport.write

[gary clark]

Much appreciated on the quick response.

It fails by writing a large string at the server side and not receiving any data at the client. The client uses open-ssl and is blocking to receive data. I dont know if its possible to determine if the write was successful or not on the server side i.e knowing how many bytes were written etc. I dont see any exceptions. The connection is still maintained and like I said its intermittent. So when a transport.write occurs is there an api I can use to see if it was successful?

I'm trying to isolate if its a server problem or a client issue at the moment.

Thanks,

Gary C

--- On Thu, 4/28/11, Glyph Lefkowitz <glyph at twistedmatrix.com> wrote:

> From: Glyph Lefkowitz <glyph at twistedmatrix.com>
> Subject: Re: [Twisted-Python] problems with transport.write
> To: "Twisted general discussion" <twisted-python at twistedmatrix.com>
> Date: Thursday, April 28, 2011, 6:43 PM
> 
> On Apr 28, 2011, at 4:18 PM, gary clark wrote:
> 
> > Hiya,
> >  
> > I have created a client-server application which uses
> ssl to communicate.
> >  
> > I am trying to determine if its the server or client.
> However its definetly sending a string in the
> connection.transport.write to the target client.
> 
> Trying to determine what is the server or the client?
> 
> > The majority of the time is sends and receives, but
> occasionally it fails.
> 
> Fails how?
> 
> > Is there a way (other than the client sending an ACK
> with a sequence number in it) to know if the write was
> successful and if not resend.
> 
> If you're using SSL, then you're using TCP, which
> transparently _does_ send an ACK with a sequence number in
> it.  You never have to re-send TCP segments at the
> application layer, that would result in a stream with
> duplicate data in it.
> 
> Please be more specific about the problem you're having, so
> we can find an answer :).
> 
> -g
> 
> 
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