[Tutor] View pop3 commands/responses script - part II

[Steve]

Okay, I figured out my problem, I was using bind instead of
connect.  Now I need a way to detect if the connection went away.
I could use some pointers on blocking versus non-blocking IO and
how I could use it to my advantage in my program.  Here is what I
have.

Thanks,
Steve
___________________________________________


from socket import *
import string,time
local=socket(AF_INET,SOCK_STREAM)
local.bind(('127.0.0.1',110))
local.setblocking(0)
local.listen(1)
addr=0
while not addr:
 try:
   conn,addr=local.accept()
 except:
   pass
print 'ip,port ',conn,addr
conn.setblocking(0)
remote=socket(AF_INET,SOCK_STREAM)
remote.connect(('popmail.com',110))
remote.setblocking(0)

count = 0
while 1:

  try:
    rdata=remote.recv(2048)
    print '<==  Data Received'
    print rdata
    conn.send(rdata)
  except:
    try:
     sdata=conn.recv(2048)
     print '==> Data sent'
     print sdata
     remote.send(sdata)
    except:
     time.sleep(1)
     pass


local.close()
remote.close()







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