Python3爬虫带上cookie的实例代码_Python

Python3爬虫带上cookie的实例代码

2020-07-29 00:18yang Python

在本篇文章里小编给各位分享的是一篇关于Python3爬虫带上cookie的实例代码内容，需要的朋友们可以学习下。

Cookie的英文原意是“点心”，它是在客户端访问Web服务器时，服务器在客户端硬盘上存放的信息，好像是服务器发送给客户的“点心”。服务器可以根据Cookie来跟踪客户状态，这对于需要区别客户的场合（如电子商务）特别有用。

当客户端首次请求访问服务器时，服务器先在客户端存放包含该客户的相关信息的Cookie，以后客户端每次请求访问服务器时，都会在HTTP请求数据中包含Cookie，服务器解析HTTP请求中的Cookie，就能由此获得关于客户的相关信息。

下面我们就来看一下python3爬虫带上cookie的方法：

1、直接将Cookie写在header头部

				?

									# coding:utf-8

									import requests

									from bs4 import BeautifulSoup

									cookie = '''cisession=19dfd70a27ec0eecf1fe3fc2e48b7f91c7c83c60;CNZZDATA1000201968=181584

									6425-1478580135-https%253A%252F%252Fwww.baidu.com%252F%7C1483922031;Hm_lvt_f805f7762a9a2

									37a0deac37015e9f6d9=1482722012,1483926313;Hm_lpvt_f805f7762a9a237a0deac37015e9f6d9=14839

									26368'''

									header = {

									'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Geck

									o) Chrome/53.0.2785.143 Safari/537.36',

									'Connection': 'keep-alive',

									'accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',

									'Cookie': cookie}

									url = 'http://www.zzvips.com/news/89636.html'

									wbdata = requests.get(url,headers=header).text

									soup = BeautifulSoup(wbdata,'lxml')

									print(soup)

2、使用requests插入Cookie

									# coding:utf-8

									import requests

									from bs4 import BeautifulSoup

									cookie = {

									"cisession":"19dfd70a27ec0eecf1fe3fc2e48b7f91c7c83c60",

									"CNZZDATA100020196":"1815846425-1478580135-https%253A%252F%252Fwww.baidu.com%252F%7C1483

									922031",

									"Hm_lvt_f805f7762a9a237a0deac37015e9f6d9":"1482722012,1483926313",

									"Hm_lpvt_f805f7762a9a237a0deac37015e9f6d9":"1483926368"

									}

									url = 'http://www.zzvips.com/article/87896.html'

									wbdata = requests.get(url,cookies=cookie).text

									soup = BeautifulSoup(wbdata,'lxml')

									print(soup)

实例扩展：

使用cookie登录哈工大ACM站点

获取站点登录地址

http://acm.hit.edu.cn/hoj/system/login

查看要传送的post数据
user和password

Code:

									#!/usr/bin/env python

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

									"""

									__author__ = 'pi'

									__email__ = 'pipisorry@126.com'

									"""

									import urllib.request, urllib.parse, urllib.error

									import http.cookiejar

									LOGIN_URL = 'http://acm.hit.edu.cn/hoj/system/login'

									values = {'user': '******', 'password': '******'} # , 'submit' : 'Login'

									postdata = urllib.parse.urlencode(values).encode()

									user_agent = r'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.157 Safari/537.36'

									headers = {'User-Agent': user_agent, 'Connection': 'keep-alive'}

									cookie_filename = 'cookie.txt'

									cookie = http.cookiejar.MozillaCookieJar(cookie_filename)

									handler = urllib.request.HTTPCookieProcessor(cookie)

									opener = urllib.request.build_opener(handler)

									request = urllib.request.Request(LOGIN_URL, postdata, headers)

									try:

									  response = opener.open(request)

									  page = response.read().decode()

									  # print(page)

									except urllib.error.URLError as e:

									  print(e.code, ':', e.reason)

									cookie.save(ignore_discard=True, ignore_expires=True) # 保存cookie到cookie.txt中

									print(cookie)

									for item in cookie:

									  print('Name = ' + item.name)

									  print('Value = ' + item.value)

									get_url = 'http://www.zzvips.com/yuanma/' # 利用cookie请求訪问还有一个网址

									get_request = urllib.request.Request(get_url, headers=headers)

									get_response = opener.open(get_request)

									print(get_response.read().decode())

									# print('You have not solved this problem' in get_response.read().decode())