Python 半自動登錄知乎-驗證碼需要識別

import time
from bs4 import BeautifulSoup
import requests

__file__ = 'zhihudata.py'
__author__ = 'Jerry Liu'
__date__ = '2016-04-21'

headers_base = {
    '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,zh-CN;q=0.6,zh;q=0.4,zh-TW;q=0.2',
    'Connection': 'keep-alive',
    'Host': 'www.zhihu.com',
    'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.130 Safari/537.36',
    'Referer': 'http://www.zhihu.com/',
}

class Zhihu:

    def __init__(self):
        self.domain = 'https://www.zhihu.com/'
        self.loginurl = 'http://www.zhihu.com/login/email'
        self.followees = 'https://www.zhihu.com/people/liuyu2783/followees'
        self.username = '[email protected]'
        self.pwd = 'xxxxxx'
        self.captcha = ''
        self.xsrf = ''
        self._session = requests.session()


    def getCaptcha(self):
        """
        獲取驗證碼
        :return:
        """
        # 驗證碼
        t = str(int(time.time() * 1000))
        captcha_url = 'http://www.zhihu.com/captcha.gif?r' + t + "&type=login"
        captcha = self._session.get(captcha_url, stream=True)
        f = open('d://爬蟲/知乎壁驗證碼/captcha.gif', 'wb')
        for line in captcha.iter_content(10):
            f.write(line)
        f.close()


    def doSignin(self):
        self.getCaptcha()
        self.captcha = input('請輸入驗證碼, ')
        # xsrf
        result = self._session.get(
            'https://www.zhihu.com/#signin',
            headers=headers_base
        )
        hbody = BeautifulSoup(result.text, "html.parser")
        self.xsrf = ((hbody.find_all('input', attrs={"name": "_xsrf"}))[0]).get('value')
        # 登錄
        result = self._session.post(
            self.loginurl,
            data={'email': self.username, 'password': self.pwd, 'captcha': self.captcha,'_xsrf': self.xsrf},
            headers=headers_base
        )
        r= result.json()
        if r['r'] == 0:
            print('登錄成功')
        else:
            print('登錄失敗,請重試......', r['msg'])
            self.doSignin()


def main():
    zhihu = Zhihu()
    zhihu.doSignin()


if __name__ == '__main__':
    main()