python+selenium识别验证码并登录的示例代码

#coding:utf-8
import subprocess
from PIL import Image
from PIL import ImageOps
from selenium import webdriver
import time,os,sys
def cleanImage(imagePath):
  image = Image.open(imagePath)  #打开图片
  image = image.point(lambda x: 0 if x<143 else 255) #处理图片上的每个像素点，使图片上每个点“非黑即白”
  borderImage = ImageOps.expand(image,border=20,fill='white')
  borderImage.save(imagePath)

def getAuthCode(driver, url="http://localhost/"):
  captchaUrl = url + "common/random"
  driver.get(captchaUrl) 
  time.sleep(0.5)
  driver.save_screenshot("captcha.jpg")  #截屏，并保存图片
  #urlretrieve(captchaUrl, "captcha.jpg")
  time.sleep(0.5)
  cleanImage("captcha.jpg")
  p = subprocess.Popen(["tesseract", "captcha.jpg", "captcha"], stdout=             subprocess.PIPE,stderr=subprocess.PIPE)
  p.wait()
  f = open("captcha.txt", "r")
  
  #Clean any whitespace characters
  captchaResponse = f.read().replace(" ", "").replace("\n", "")
  print("Captcha solution attempt: " + captchaResponse)
  if len(captchaResponse) == 4:
    return captchaResponse
  else:
    return False

def withoutCookieLogin(url="http://org.cfu666.com/"):
  driver = webdriver.Chrome()
  driver.maximize_window()
  driver.get(url)
  while True:   
    authCode = getAuthCode(driver, url)
    if authCode:
      driver.back()
      driver.find_element_by_xpath("//input[@id='orgCode' and @name='orgCode']").clear()
      driver.find_element_by_xpath("//input[@id='orgCode' and @name='orgCode']").send_keys("orgCode")
      driver.find_element_by_xpath("//input[@id='account' and @name='username']").clear()
      driver.find_element_by_xpath("//input[@id='account' and @name='username']").send_keys("username")
      driver.find_element_by_xpath("//input[@type='password' and @name='password']").clear()
      driver.find_element_by_xpath("//input[@type='password' and @name='password']").send_keys("password")       
      driver.find_element_by_xpath("//input[@type='text' and @name='authCode']").send_keys(authCode)
      driver.find_element_by_xpath("//button[@type='submit']").click()
      try:
        time.sleep(3)
        driver.find_element_by_xpath("//*[@id='side-menu']/li[2]/ul/li/a").click()
        return driver
      except:
        print("authCode Error:", authCode)
        driver.refresh()
  return driver
driver = withoutCookieLogin("http://localhost/")
driver.get("http://localhost/enterprise/add/")