[Twisted-Python] Sending disconnect messages to clients
L. Daniel Burr
ldanielburr at me.com
Tue Mar 22 13:49:46 MDT 2016
Hi Chris,
On March 22, 2016 at 2:42:14 PM, Chris Norman (chris.norman2 at googlemail.com) wrote:
Hi all,
I'm sure I asked this question before, but I can't find any answers on
google, and I've changed my work flow a bit now, so thought it was worth
re-asking.
So on my server's protocol, I have a send method. This allows me to pass
arguments which get sent off to the client in the right format. The send
method looks something like this:
def send(self, command, **kwargs):
"""Cause the client to issue getattr(connection, command)(**kwargs).
If disconnect evaluates to True, disconnect the client after the message
is sent."""
disconnect = kwargs.get('disconnect', False)
try:
del kwargs['disconnect']
except KeyError:
pass # Argument not found.
d = defer.Deferred()
d.addCallback(self.prepare_command) Convert the command and kwargs to
json.
d.addCallback(self.deferred_write) # Write the json to the transport.
if disconnect:
d.addCallback(self.deferred_disconnect) # Issue
self.transport.loseConnection().
You are disconnecting right here, without waiting for your Deferred to fire. It might make better sense to add the call the self.transport.loseConnection() to your Deferred’s callback chain.
Hope this helps,
Daniel
--
L. Daniel Burr
ldanielburr at me.com
(312) 656-8387
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