#! /usr/bin/env python2.6
# 2013-1-28
# written by Tony.yang
#

import os
import sys
import getopt
import urllib

def usage():
        print """
---------------------------------------------------------------------------------------------
| Tony-warn: This nagios receiving return status.(0:OK; 1:WARNING;  2:CRITICAL;  3:UNKNOWN) |
---------------------------------------------------------------------------------------------
Usage: check_web_status [-h|--help] [-u|--url value] [-s|--status url_status]

If url_status is not %s of the url, the script will send critical message. % (url_status)
"""
        sys.exit(3)

# obtain command args
try:
        options, args = getopt.getopt(sys.argv[1:], 'hu:s:', '--help --url= --status=')
except getopt.GetoptError:
        usage()
        sys.exit(3)

#
argUrl = 'http://__init__'
argStatus = '200__init__'

#
for name, value in options:
        if name in ('-h', '--help'):
                usage()
        if name in ('-u', '--url'):
                try:
                        argUrl = value
                except Exception:
                        print "Unable to converting char URL\n"
        if name in ('-s', '--status'):
                try:
                        argStatus = value
                except Exception:
                        print "Unable to converting char STATUS\n"
                        usage()

try:
        Status_url = urllib.urlopen(argUrl).getcode()
        #print  "WEB: %s" % Status_url
except Exception:
        print "GETLOADAVG UNKNOWN: Error while requesting this URL"
        sys.exit(3)

if str(argStatus) == str(Status_url):
        print "WEBURL OK: This %s state is %s" % (argUrl, Status_url)
        print "0"
        sys.exit(0)
else:
        #print "weburl xx: the url is %s" % (argStatus)
        print "WEBURL CRITICAL: This %s state is %s" % (argUrl, Status_url)
        print "2"
        sys.exit(2)


备注：
此脚本使用起来很灵活，可以和nagios使用起来也很方便，废话不多说，看实例：
python2.6 check_web_status.py -u yoururl -s yoururl_status(200, 301, 302, 404, 500 ... 都可以)

[xxx@xxx 10:32:47 ]# /usr/bin/python2.6 check_web_status.py -u http://www.8558.com/ -s 200
WEBURL OK: This http://www.8558.com/ state is 200
0  <----为nagios返回0
[xxx@xxx 10:32:47 ]# /usr/bin/python2.6 check_web_status.py -u http://www.8558.com/index.ph -s 200
WEBURL CRITICAL: This http://www.8558.com/index.ph state is 404
2  <----为nagios返回2


解释：-u 参数后面可以加你要监控的网址。
            -s  参数后面可以加你要监控网址的状态，如何你监控的状态是301，那么除了301状态，其他的会报警给nagios。