how to know if socket is still connected

[Steve Holden]

Lawrence D'Oliveiro wrote:
> In message <12blgl1t9egsqb8 at corp.supernews.com>, Grant Edwards wrote:
> 
> 
>>If the server has closed the connection, then a recv() on the
>>socket will return an empty string "", and a send() on the
>>socket will raise an exception.
> 
> 
> Would that still apply when trying to send an empty string?

Yes: sending an empty string demands no action on the server's part, as 
the receiver has already received it ... adding an empty string to 
whatever the sender currently has buffered does not require any state 
change on the sender's part.

regards
  Steve
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