On Mon, Jun 27, 2005 at 02:38:48PM -0400, Tim Peters wrote:
| > Any suggestions about how to best implement this,
|
| Maybe just create your own socket, attempt to connect, and if that attempt
| fails produce the kind of error message you want to see? Of course if it
| succeeds, there's some chance it will fail if you immediately close the
| socket and do a "normal" connection attempt.
That is good enough for me yes. Attached the script I've came up with,
which is far from perfect but has just the amount of functionality I
needed. Maybe we should include something similar to that with ZEO
itself?
--
Sidnei da Silva
Enfold Systems, LLC.
#!/usr/bin/python
#$Id: zeo_ping.py 2338 2005-07-02 00:39:31Z sidnei $
# Licensed under the Enfold Enterprise Server License Agreement
# Copyright(c), 2004-5, Enfold Systems, LLC, ALL RIGHTS RESERVED
import re
import socket
SERVER_PROTOCOL = re.compile('Z\d{3}$')
def zeo_ping(host, port, timeout=5, reraise=False,
handshake=False):
"""Ping a supposed ZEO server and see if it's up and running.
host
hostname or ip to connect to
port
port to use for connection
timeout
maximum time in seconds to wait for a connection
reraise
if a connection error occurs, re-raise the exception or not
handshake
try a zeo handshake
"""
port = int(port)
timeout = float(timeout)
reraise = bool(reraise)
handshake = bool(handshake)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(timeout)
try:
try:
s.connect((host, port))
except socket.error:
if reraise:
raise
return False
else:
if not handshake:
return True
# See if it smells like ZEO
try:
data = s.recv(1024)
except socket.error:
if reraise:
raise
return False
else:
return bool(SERVER_PROTOCOL.search(data))
finally:
s.close()
return True
if __name__ == '__main__':
import sys
print zeo_ping(*sys.argv[1:])
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