from selenium import webdriver
from selenium.common.exceptions import TimeoutException, NoSuchElementException
browser = webdriver.Chrome()
try:
  browser.get('https://www.baidu.com')
except TimeoutException:
  print('超时')
try:
  browser.find_element_by_id('aa')
except NoSuchElementException:
  print('未找到节点')
finally:
browser.close()

#!/usr/bin/env python

import sys
from selenium import webdriver

url = '<main web site>'
systemInformation = '<sys information site>'
logout = '<log out link>'
browser = webdriver.PhantomJS('<path to phantomjs for headless operation>')
login_username = '<username>'
login_password = '<password>'

try:
  browser.get(url)
  username = browser.find_element_by_name("username")
  password = browser.find_element_by_name("password")

  username.send_keys(login_username)
  password.send_keys(login_password)

  link = browser.find_element_by_name('loginbutton')
  link.click()

  browser.get(systemInformation)

  print "OK: Web Application is Running"
  for element in browser.find_elements_by_name('SystemReportsForm'):
    print element.text

  browser.get(logout)
  browser.quit()
  sys.exit(0)
except:
  print "WARNING: Web Application is Down!"
  sys.exit(2)

#!/usr/bin/env python

import sys, urllib2
from selenium import webdriver

url = '<log in url>'
systemInformation = '<sys info url>'
logout = '<logout url>'
browser = webdriver.PhantomJS('<phantomjs location for headless browser>')
login_username = '<user>'
login_password = '<password>'

def login(login_url,status_url):
  browser.get(login_url)
  username = browser.find_element_by_name("username")
  password = browser.find_element_by_name("password")

  username.send_keys(login_username)
  password.send_keys(login_password)

  link = browser.find_element_by_name('loginbutton')
  link.click()

  browser.get(status_url)

  if browser.title == 'Log In':
    print "WARNING: Site up but Failed to login!"
    browser.get(logout)
    browser.quit()
    sys.exit(1)
  else:
    print "OK: Everything Looks Good"
    for element in browser.find_elements_by_name('SystemReportsForm'):
      print element.text

    browser.get(logout)
    browser.quit()
    sys.exit(0)

req = urllib2.Request(url)

try:
  urllib2.urlopen(req)
  login(url,systemInformation)
except urllib2.HTTPError as e:
  print('CRITICAL: Site Appears to be Down!')
  browser.get(logout)
  browser.quit()
  sys.exit(2)