python socket 检测服务器端口

#!/usr/bin/env python

import socket
import re
import sys


def check_server(address, port):
    s = socket.socket()
    print("Attempting to connect to %s on port %s" % (address, port))
    try:
        s.connect((address, port))
        print("Connected to %s on port %s" % (address, port))
        return True
    except socket.error, e:
        print("Connected to %s on %s port failed: %s" % (address, port, e))
        return False

if __name__ == "__main__":
    from optparse import OptionParser
    parser = OptionParser()
    parser.add_option("-a", "--address", dest="address", default="localhost",
                      help="ADDRESS for server", metavar="ADDRESS")
    parser.add_option("-p", "--port", dest="port", type=int, default=80,
                      help="PORT for server", metavar="PORT")

    (options, args) = parser.parse_args()
    print("options:%s, args: %s" % (options, args))
    check = check_server(options.address, options.port)
    print("check_server returned %s" % check)
    sys.exit(not check)