对python抓取需要登录网站数据的方法详解
发布时间:2020-12-16 21:10:41 所属栏目:Python 来源:网络整理
导读:scrapy.FormRequest login.py class LoginSpider(scrapy.Spider): name = 'login_spider' start_urls = ['http://www.login.com'] def parse(self,response): return [ scrapy.FormRequest.from_response( response,# username和password要根据实际页面的表
scrapy.FormRequest login.py class LoginSpider(scrapy.Spider): name = 'login_spider' start_urls = ['http://www.login.com'] def parse(self,response): return [ scrapy.FormRequest.from_response( response,# username和password要根据实际页面的表单的name字段进行修改 formdata={'username': 'your_username','password': 'your_password'},callback=self.after_login)] def after_login(self,response): # 登录后的代码 pass selenium登录获取cookie get_cookie_by_selenium.py import pickle import time from selenium import webdriver def get_cookies(): url = 'https://www.test.com' web_driver = webdriver.Chrome() web_driver.get(url) username = web_driver.find_element_by_id('login-email') username.send_keys('username') password = web_driver.find_element_by_id('login-password') password.send_keys('password') login_button = web_driver.find_element_by_id('login-submit') login_button.click() time.sleep(3) cookies = web_driver.get_cookies() web_driver.close() return cookies if __name__ == '__main__': cookies = get_cookies() pickle.dump(cookies,open('cookies.pkl','wb')) 获取浏览器cookie(以Ubuntu的Firefox为例) get_cookie_by_firefox.py import sqlite3 import pickle def get_cookie_by_firefox(): cookie_path = '/home/name/.mozilla/firefox/bqtvfe08.default/cookies.sqlite' with sqlite3.connect(cookie_path) as conn: sql = 'select name,value from moz_cookies where baseDomain="test.com"' cur = conn.cursor() cookies = [{'name': name,'value': value} for name,value in cur.execute(sql).fetchall()] return cookies if __name__ == '__main__': cookies = get_cookie_from_firefox() pickle.dump(cookies,'wb')) scrapy使用获取后的cookie cookies = pickle.load(open('cookies.pkl','rb')) yield scrapy.Request(url,cookies=cookies,callback=self.parse) requests使用获取后的cookie cookies = pickle.load(open('cookies.pkl','rb')) s = requests.Session() for cookie in cookies: s.cookies.set(cookie['name'],cookie['value']) selenium使用获取后的cookie from selenium import webdriver cookies = pickle.load(open('cookies.pkl','rb')) w = webdriver.Chrome() # 直接添加cookie会报错,下面是一种解决方案,可能有更好的 # -- start -- w.get('http://www.test.com') w.delete_all_cookies() # -- end -- for cookie in cookies: w.add_cookie(cookie) 以上这篇对python抓取需要登录网站数据的方法详解就是小编分享给大家的全部内容了,希望能给大家一个参考,也希望大家多多支持编程小技巧。 您可能感兴趣的文章:
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