[Twisted-Python] twisted and gprs networks
johna at johnaherne.co.uk
Sun Jan 7 06:41:52 EST 2007
I am looking at using PDA devices talking to a server over gprs.
I need to push data to the PDA over elapsed timeframes that might be
hours. Naturally during this timespan the device may have been dropped
from the network or acquire a different IP address.
However to push data to the PDA, I need to record the IP and port used
by the PDA for its first contact since it is stuck behind a firewall.
The socket needs to be kept open on the PDA so the server can keep
responding on the same session over a period of time.
Using straight sockets I can do this by holding the reference to the
IP/port used by the PDA. And checking every now and then that the
connection is still valid. But I am no comms expert and I need to keep
track of over 100 devices and keep reliably sending messages to them at
So, I thought it might be better to use some framework for the server
since I am no expert on sockets.
But looking through the docs for twisted and some of the code, I can't
see anywhere how I can get and use a reference to the port and reuse the
open session on the PDA.
Can I do this with twisted or should I look for some other way of doing
what I want.
I was thinking I could use irc with twisted but not sure if I am barking
up the wrong tree.
Thanks for any ideas of solving the problem.
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