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Set cookie expiration to automatically update and automatically obtain
Set cookie expiration to automatically update and automatically obtain
This time I will introduce to you the settings for automatic update and automatic acquisition of cookie expiration. What are the precautions for setting automatic update and automatic acquisition of cookie expiration? The following is a practical case, let's take a look.
This article implements automatic acquisition of cookies and automatic update of cookies when they expire. A lot of information on social networking sites requires logging in to get it. Take Weibo as an example. Without logging in, you can only see the top ten Weibo posts of big Vs. To stay logged in, cookies are required. Take logging in to www.weibo.cn as an example: Enter in chrome: http://login.weibo.cn/login/
Implementation steps:
1, use selenium to automatically log in to obtain cookies, save them to a file; 2, read cookie, compare the validity period of the cookie, and if it expires, perform step 1 again; 3, when requesting other web pages, fill in the cookie to maintain the login status. 1, Get cookies onlineUse selenium + PhantomJS to simulate browser login and obtain cookies;There are usually multiple cookies, and the cookies are stored one by one in .weibo suffix file.def get_cookie_from_network():
from selenium import webdriver
url_login = 'http://login.weibo.cn/login/'
driver = webdriver.PhantomJS()
driver.get(url_login)
driver.find_element_by_xpath('//input[@type="text"]').send_keys('your_weibo_accout') # 改成你的微博账号
driver.find_element_by_xpath('//input[@type="password"]').send_keys('your_weibo_password') # 改成你的微博密码
driver.find_element_by_xpath('//input[@type="submit"]').click() # 点击登录
# 获得 cookie信息
cookie_list = driver.get_cookies()
print cookie_list
cookie_dict = {}
for cookie in cookie_list:
#写入文件
f = open(cookie['name']+'.weibo','w')
pickle.dump(cookie, f)
f.close()
if cookie.has_key('name') and cookie.has_key('value'):
cookie_dict[cookie['name']] = cookie['value']
return cookie_dictdef get_cookie_from_cache():
cookie_dict = {}
for parent, dirnames, filenames in os.walk('./'):
for filename in filenames:
if filename.endswith('.weibo'):
print filename
with open(self.dir_temp + filename, 'r') as f:
d = pickle.load(f)
if d.has_key('name') and d.has_key('value') and d.has_key('expiry'):
expiry_date = int(d['expiry'])
if expiry_date > (int)(time.time()):
cookie_dict[d['name']] = d['value']
else:
return {}
return cookie_dictdef get_cookie(): cookie_dict = get_cookie_from_cache() if not cookie_dict: cookie_dict = get_cookie_from_network() return cookie_dict
def get_weibo_list(self, user_id):
import requests
from bs4 import BeautifulSoup as bs
cookdic = get_cookie()
url = 'http://weibo.cn/stocknews88'
headers = {'User-Agent': 'Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36'}
timeout = 5
r = requests.get(url, headers=headers, cookies=cookdic,timeout=timeout)
soup = bs(r.text, 'lxml')
...
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