在selenium的登录中经常需要输入验证码，用了很多种方法，识别准确率都不高（比较靠谱的tesseract）。可以用下面几种方法来替代

1. 去掉验证码
2. 设置个万能验证码
3. cookie代替

我用的第三种方法，首先在浏览器手动登陆，然后查看request header复制到selenium中的header中

# -*- coding: utf-8 -*-

from selenium import webdriver
import os
headers = { 'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
    'Accept-Encoding':'gzip, deflate, sdch',
    'Accept-Language':'en-US,en;q=0.8',
    'Cache-Control':'max-age=0',
    'Connection':'keep-alive',
    'Cookie':'thinkphp_show_page_trace=0|0; token=lufs9rm61fl5jqecb3gqh56i66; Hm_lvt_080836300300be57b7f34f4b3e97d911=1478065312,1478138929; Hm_lpvt_080836300300be57b7f34f4b3e97d911=1478140277',
    'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.116 Safari/537.36' }

for key in headers:
    webdriver.DesiredCapabilities.PHANTOMJS['phantomjs.page.customHeaders.{}'.format(key)] = headers[key]
phantomjs_path = r"E:\app\phantomjs-2.1.1-windows\bin\phantomjs.exe"
driver = webdriver.PhantomJS(executable_path=phantomjs_path, service_log_path=os.path.devnull)
driver.get("url")  
driver.maximize_window()  #将浏览器最大化
print(driver.title)