witre nagios plugin with python

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#!/usr/bin/env python

from mechanize import Browser
from optparse import OptionParser

# Exit statuses recognized by Nagios
UNKNOWN = -1
OK = 0
WARNING = 1
CRITICAL = 2

def open_url(br, url):
"""Use a given mechanize.Browser to open url.

If an exception is raised, then exit with CRITICAL status for Nagios.
"""
try:
response = br.open(url)
except Exception, e:
# Catching all exceptions is usually a bad idea.  We want to catch
# them all to report to Nagios here.
print 'CRITICAL - Could not reach page at %s: %s' % (url, e)
raise SystemExit, CRITICAL
return response

# I'm going to be using optparse.OptionParser from now on.  It makes
# command-line args a breeze.
parser = OptionParser()
parser.add_option('-H', '--hostname', dest='hostname')
parser.add_option('-u', '--username', dest='username')
parser.add_option('-p', '--password', dest='password')
parser.add_option('-r', '--report_url', dest='url',
help="""Path to report relative to root, like
/NetPerfMon/Report.asp?Report=Hostname+__+IPs""")
parser.add_option('-v', '--verbose', dest='verbose', action='store_true',
default=False)
parser.add_option('-q', '--quiet', dest='verbose', action='store_false')

options, args = parser.parse_args()

# Check for required options
for option in ('hostname', 'username', 'password', 'url'):
if not getattr(options, option):
print 'CRITICAL - %s not specified' % option.capitalize()
raise SystemExit, CRITICAL

# Go to the report and get a login page
br = Browser()
report_url = 'https://%s%s' % (options.hostname, options.url)
open_url(br, report_url)
br.select_form('aspnetForm')

# Solarwinds has interesting field names
# Maybe something with asp.net
br['ctl00$ContentPlaceHolder1$Username'] = options.username
br['ctl00$ContentPlaceHolder1$Password'] = options.password

# Attempt to login.  If we can't, tell Nagios.
try:
report = br.submit()
except Exception, e:
print 'CRITICAL - Error logging in: e' % e
raise SystemExit, CRITICAL

report_html = report.read()
# class=Property occurs in every cell in a Solarwinds report.  If it's not
# there, something is wrong.
if 'class=Property' not in report_html:
print 'CRITICAL - Report at %s is down' % report_url
raise SystemExit, CRITICAL

# If we got this far, let's tell Nagios the report is okay.
print 'OK - Report at %s is up' % report_url
raise SystemExit, OK