I am trying to figure out the optimal way to make socket connections (INET) and
check for timeouts. The socket module has settimeout(timeout) and
setdefaulttimeout(timeout). However, so far as I can tell, these apply to
socket objects. The type of socket connection I want to make is
getfqdn(address). So I can set the default timeout for socket, but not a socket
object (makes sense so far). I cannot use the getfqdn(address) method on a
socket object, I have to use it on socket. This means (as I understand it thus
far), that while I can set a timeout value for socket objects, this will not
apply to when I use the getfqdn() method, which is where I need a timeout
check! Some example code for the steps so far:
>>> import socket
>>> conn = socket.socket()
>>> conn.setdefaulttimeout(2.0)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: '_socketobject' object has no attribute 'setdefaulttimeout'
>>> socket.setdefaulttimeout(2.0)
>>> conn.getfqdn("64.33.212.2")
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: '_socketobject' object has no attribute 'getfqdn'
>>> socket.getfqdn("64.33.212.2")
'64-33-212-2.customers.pingtone.net'
>>> # Disconnected network connection here
...
>>> socket.getfqdn("64.33.212.2")
'64.33.212.2'
>>> # Reconnected network connection here
>>> socket.getfqdn("64.33.212.2")
'64-33-212-2.customers.pingtone.net'
After I disconnected my network connection and called getfqdn(), it returned
the IP address I called it with after about 25 seconds. So the default timeout
was ignored? Is there some other way to call this function so that I can check
for timeouts? Should I instead just put my network calls in a thread and see
how long they take, stopping them after a certain period?
Thanks for any help.
-Sam
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