組合語言（王爽）-實驗16
阿新 • • 發佈：2021-08-10
爬蟲
介紹
# 爬蟲流程 模擬傳送http請求 ---> 解析資料(清洗資料) ---> 入庫 # 百度、谷歌...(大爬蟲) 百度搜索：輸入關鍵字 ---> 搜的是百度的資料庫 ---> 頁面展示 ---> 點選具體內容 ---> 網頁跳轉 seo優化：主動讓百度爬到你 sem：花錢做廣告買關鍵詞 # 爬蟲協議 哪部分允許爬取，哪部分不允許爬取(https://www.csdn.net/robots.txt) # python中爬蟲相關內容 模擬傳送http請求(requests，slenium) ---> 解析資料(清洗資料)(json、bs4...) --->入庫 (檔案、mysql、redis、Excel、MongoDB) 反爬： 封ip --- 代理池 封賬號 --- cookie池 請求頭中帶特殊校驗 --- 相應破解出那些欄位 資料加密 --- js解析出加密方式，自行組裝資料 html --- css反爬，字型反爬
requests庫介紹
# requests模組，基於urllib3封裝，方便的發出http請求
# pip install requests
requests傳送get請求
- 普通請求
res=requests.get('https://www.cnblogs.com/xiaoyuanqujing/articles/11805698.html') print(res.text) # 返回的資料 search = input('請輸入要搜尋的內容：') res = requests.get('https://www.baidu.com/s?wd=' + search, headers={ 'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36', 'Host': 'www.baidu.com', }) print(res.text) with open('search.html','w',encoding='utf-8') as f: f.write(res.text)
- 攜帶引數
import requests response=requests.get('https://www.sogou.com/web', headers={ 'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/62.0.3202.75 Safari/537.36', },params={'query':'美女'}) print(response.text) with open('search.html','w',encoding='utf-8') as f: f.write(response.text) # url編碼和解碼 from urllib.parse import quote,unquote # res=quote('美女') # print(res) #%E7%BE%8E%E5%A5%B3 res=unquote('%E7%BE%8E%E5%A5%B3') print(res) from urllib.parse import urlencode res=urlencode({'wd':'美女','age':19},encoding='utf-8') print(res)
- 攜帶請求頭
# 如果被做了反爬，但是用瀏覽器可以，一定是模擬的不像
header={'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36',
'Cookie':'BIDUPSID=185720F0FEA0DC697147E75D48AFB1D8; PSTM=1593942899; BAIDUID=185720F0FEA0DC69D0675C2EEDB05721:SL=0:NR=10:FG=1; sug=3; ORIGIN=0; bdime=0; sugstore=1; BD_UPN=12314753; __yjs_duid=1_61812ebe639caffca8271e1786971c8b1617936053918; BDUSS=lhDOTR6OWU0UWdmcFBLTDdxRUlqQXJtdFFjajlxfjFhVUpRLTNDNEd0VW51Uk5oSVFBQUFBJCQAAAAAAAAAAAEAAACwPo3XwM~E0Lqiyc-6o9Cjx~gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACcs7GAnLOxgW; BDUSS_BFESS=lhDOTR6OWU0UWdmcFBLTDdxRUlqQXJtdFFjajlxfjFhVUpRLTNDNEd0VW51Uk5oSVFBQUFBJCQAAAAAAAAAAAEAAACwPo3XwM~E0Lqiyc-6o9Cjx~gAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACcs7GAnLOxgW; BDORZ=B490B5EBF6F3CD402E515D22BCDA1598; BDSFRCVID_BFESS=uQLOJeC62GhrmIcHWL4ru7XUvDmJR3TTH6aoUKcPVTiblG6zzmh3EG0Pbf8g0K4bdMXhogKK0eOTHkuF_2uxOjjg8UtVJeC6EG0Ptf8g0f5; H_BDCLCKID_SF_BFESS=tRk8oK-aJKvbfP0kKno_MtCsqxby26n9-Rb9aJ5y-J7nhMTz5Mn1DT_OQl_fXpQq5m3ion3vQpbZ8h5D34vW-fLRDmct-p5MQ26xKl0MLPbcsU5nBU4VhnkD2fnMBMPj5mOnaIQc3fAKftnOM46JehL3346-35543bRTLnLy5KJYMDFCjTA-D6QyeUbQa4JWHD6QB4TaajrjDnCrBPjUXUI82h5y05OkbmteaU3PJMnhMUna54ovynKZDnORXx745j5b-bA-Bh3tfKJKbPQ63ML1Db3JqP7M0aQtsCouan3oepvoD-oc3MvByPjdJJQOBKQB0KnGbUQkeq8CQft20b0EeMtjW6LEJJkO_D_atKvDqTrP-trf5DCShUFsWPKJB2Q-XPoO3KJZfqRhyhJIjpk0jn7P-tQiW5cpoMbgylRM8P3y0bb2DUA1y4vpK-ogQgTxoUJ2fnRJEUcGqj5Ah--ebPRiJPQ9Qg-qahQ7tt5W8ncFbT7l5hKpbt-q0x-jLTnhVn0MBCK0hD0wjT0-DjcM-Uv05-PXKCJ0X458HJOoDDvFqfbcy4LdjG5NeRvbLnc7-hRu2PKboM5Cbxbmj4Pu3-Aq54RIL5505tnqtMcNb-0xeJrhQfbQ0bjuqP-jW5Ta-qI-HR7JOpkxbfnxy-P0QRPH-Rv92DQMVU52QqcqEIQHQT3m5-5bbN3ht6IHJJIq_I82JIvbfP0k5R35hnjH-UIs-lorB2Q-5KL-3bnKDqTnyhJdjbD0jn7P-f3LWHue-UbdJJjoSqvn0hjxMtDjQNjEhtr3t2TxoUJt5DnJhhkm-4OYW-kebPRiJPQ9QgbWLlQ7tt5W8ncFbT7l5hKpbt-q0x-jLTnhVn0M5DK0HPonHjAKDjvP; delPer=0; BD_CK_SAM=1; PSINO=3; BAIDUID_BFESS=185720F0FEA0DC69D0675C2EEDB05721:SL=0:NR=10:FG=1; H_PS_PSSID=34300_34335_34273_31254_34377_33848_34092_34107_34111_26350_34360; COOKIE_SESSION=3698_4_8_9_18_23_0_1_7_3_0_11_2964_0_0_0_1628046671_1627963945_1628050426%7C9%23101_72_1627963943%7C9; H_PS_645EC=4707Tvcdepk6pvKnFnabHvwqrLGAFZiyVAOXDTeK8IdAgRrAQD714rlnFSA; BA_HECTOR=0ha5al208l240k2hf91ggk5e30q'}
res = requests.get('https://www.baidu.com/s?wd=帥哥',headers=header)
print(res.text)
with open('search.html','w',encoding='utf-8') as f:
f.write(res.text)
- 攜帶cookie
res = requests.get('http://www.aa7a.cn/', headers={
# 'cookie': 'ECS_ID=b435f5897f41c2f2c322fa3065165c9fbc56ddd5; ECS[visit_times]=1; _jzqa=1.4423902263705487400.1628049030.1628049030.1628049030.1; _jzqc=1; _jzqy=1.1628049030.1628049030.1.jzqsr=baidu.-; _jzqckmp=1; UM_distinctid=17b0f48bcda509-0e53827f49b667-5e422810-1fa400-17b0f48bcdb54c; CNZZDATA4603183=cnzz_eid%3D1414483188-1628045968-null%26ntime%3D1628045968; Hm_lvt_c29657ca36c6c88e02fed9a397826038=1628049030; CNZZDATA1260462072=271803043-1628045968-null%7C1628045968; Qs_lvt_201322=1628049030; mediav=%7B%22eid%22%3A%22179539%22%2C%22ep%22%3A%22%22%2C%22vid%22%3A%22%22%2C%22ctn%22%3A%22%22%2C%22vvid%22%3A%22%22%2C%22_mvnf%22%3A1%2C%22_mvctn%22%3A0%2C%22_mvck%22%3A1%2C%22_refnf%22%3A0%7D; _qzjc=1; __xsptplusUT_422=1; __xsptplus422=422.1.1628049032.1628049032.1%234%7C%7C%7C%7C%7C%23%23HXwWiieCoDk4evQa5H5dKIEBtnxLTY12%23; ECS[username]=616564099%40qq.com; ECS[user_id]=61399; ECS[password]=4a5e6ce9d1aba9de9b31abdf303bbdc2; _qzja=1.1591066928.1628049030327.1628049030327.1628049030327.1628049032756.1628049055229.616564099%2540qq_com.1.0.3.1; _qzjb=1.1628049030327.3.0.0.0; _qzjto=3.1.0; _jzqb=1.8.10.1628049030.1; Qs_pv_201322=2246468261428716000%2C1231523507243942000; Hm_lpvt_c29657ca36c6c88e02fed9a397826038=1628049055; cto_bundle=Gd60IF9TJTJGRHFuTzdidXZYZGEyVW9ydFFJV25YY0RqSlBRODRlTDdjSG9RT01NUlg4NmYyVjhPMzNmenolMkJDMlRiQjJWTHA2UlBoUUdNOGtBTnoyTkZqdmJMOEI5Vk14aVU4JTJGbHdyTXFqaCUyRlY1dWt3JTNE'
})
print('[email protected] ' in res.text)
requests傳送post請求
- 自動登入某網站
res = requests.post('http://www.aa7a.cn/user.php', data={
'username': '[email protected]',
'password': 'lqz123',
'captcha': 'zxv7',
'remember': 1,
'ref': 'http://www.aa7a.cn/',
'act': 'act_login'
})
# print(res.text)
## 取出cookie,登入成功的cookie
cookie=res.cookies # CookieJar物件
print(cookie)
res2=requests.get('http://www.aa7a.cn/',cookies=cookie)
# res2=requests.get('http://www.aa7a.cn/')
print('[email protected]' in res2.text)
- body體中攜帶資料
### 6 body體攜帶資料
# res = requests.post('',data={}) # urlencoded方式
# res = requests.post('',json='json格式字串') # aplication/json方式
# res = requests.post('',json='',headers={
# 'content-type': 'application/json;charset=utf-8'
# })
- response屬性、編碼問題，獲取二進位制，解析json
## 7 response屬性，
# respone=requests.get('http://www.aa7a.cn/')
#
#
# print(respone.text) # 響應體的字串
# print('----------------------------------')
# print(respone.content) # 響應體的二進位制（圖片，視訊，頁面）
# print('----------------------------------')
# print(respone.status_code) # 響應的狀態碼
# print(respone.headers) # 響應頭
# print(respone.cookies) # 返回的cookie
# print(respone.cookies.get_dict()) # cookieJar物件轉成字典
# print(respone.cookies.items()) # 相當於字典的items
#
# print(respone.url) # 當次請求地址
# print(respone.history) # 重定向過才有值
#
# print(respone.encoding) # 響應的編碼格式
#關閉：response.close()
# from contextlib import closing
# with closing(requests.get('xxx',stream=True)) as response:
# for line in response.iter_content():
# pass
# 8 編碼問題，
# 可能會遇到列印respone.text出現亂碼，在瀏覽器頁面中看不會出現亂碼
# respone=requests.get('http://www.aa7a.cn/')
# # respone.encoding='gbk' # 修改編碼方式
# respone.encoding=respone.apparent_encoding # 頁面使用的編碼方式
# print(respone.text) # 響應體的字串
# 9 獲取二進位制，
res=requests.get('http://www.aa7a.cn/data/afficheimg/20201102gophex.png')
# print(res.content)
# with open('致命誘惑.png','wb') as f:
# f.write(res.content)
# with open('致命誘惑.png','wb') as f:
# for line in res.iter_content(1024):
# f.write(line)
# 10 解析json
# import json
# res=requests.get('https://api.luffycity.com/api/v1/course/category/actual/?courseType=actual')
# # print(json.loads(res.text))
#
# print(res.json())
爬取視訊
# 爬取視訊
#https://www.pearvideo.com/category_loading.jsp?reqType=5&categoryId=5&start=0
# import re
# res=requests.get('https://www.pearvideo.com/category_loading.jsp?reqType=5&categoryId=5&start=0')
#
# # print(res.text)
# # 如果使用bs4，非常簡單
#
# video_list=re.findall('<a href="(.*?)" class="vervideo-lilink actplay">',res.text)
# # print(video_list)
# for video in video_list:
# video_url='https://www.pearvideo.com/'+video
# # print(video_url)
# video_id=video.split('_')[-1]
#
# header={
# 'Referer':video_url
# }
#
# res2=requests.get('https://www.pearvideo.com/videoStatus.jsp?contId=%s&mrd=0.5165499193941832'%video_id,headers=header)
#
# video_f_url=res2.json()['videoInfo']['videos']['srcUrl']
# video_real_url=video_f_url.replace(video_f_url.rsplit('/')[-1].split('-')[0], 'cont-%s' % video_id)
# print(video_real_url)
#
# res3=requests.get(video_real_url)
# with open('%s.mp4'%video_id,'wb') as f:
# for line in res3.iter_content(1024):
# f.write(line)
# 分析過程稿
# referer:上一次訪問的地址，可以做圖片防盜鏈
# header={
# 'Referer': 'https://www.pearvideo.com/video_1737590'
# }
#
# res=requests.get('https://www.pearvideo.com/videoStatus.jsp?contId=1737590&mrd=0.5165499193941832',headers=header)
# print(res.text)
## 可以播放的視訊
# 'https://video.pearvideo.com/mp4/short/20210729/cont-1736870-15732687-hd.mp4'
# ## 不可以播放的視訊
# 'https://video.pearvideo.com/mp4/short/20210729/1628062847275-15732687-hd.mp4'
#
#
# 'https://video.pearvideo.com/mp4/short/20210729/ cont-1736870 -15732687-hd.mp4'
# 'https://video.pearvideo.com/mp4/short/20210729/ 1628062847275 -15732687-hd.mp4'
#
# s='https://video.pearvideo.com/mp4/short/20210729/ 1628062847275 -15732687-hd.mp4'
# s.replace(s.rsplit('/')[-1].split('-')[0],'cont-%s'%video_id)
補充
# 長鏈轉短鏈服務
核心：重定向
requests高階用法
- 補充
1 正向代理和反向代理
正向代理：代理客戶端
反向代理：代理服務端(nginx就是反向代理伺服器)
2 requests使用的代理：正向代理
- SSL Cert Verification（瞭解）
## 不驗證證書
# import requests
# respone=requests.get('https://www.12306.cn',verify=False) #不驗證證書,報警告,返回200
# print(respone.status_code)
#
#
# ## 攜帶證書
# import requests
# respone=requests.get('https://www.12306.cn',
# cert=('/path/server.crt',
# '/path/key'))
# print(respone.status_code)
- 使用代理
# import requests
# proxies = {
# 'http':'http://117.69.230.132:3256',
# }
# respone=requests.get('https://www.12306.cn',
# proxies=proxies)
#
# print(respone.status_code)
# import requests
# proxies = {
# 'http':'http://117.69.230.132:3256',
# }
# # respone=requests.get('http://127.0.0.1:8000',proxies=proxies)
# respone=requests.get('http://127.0.0.1:8000')
#
# print(respone.text)
# import requests
# proxies = {
# 'http':'http://103.228.245.98:3128',
# }
# respone=requests.get('http://101.133.225.166:8888/',proxies=proxies)
# # respone=requests.get('http://101.133.225.166:8888/')
#
# print(respone.text)
## 如果你有很多代理，每次發請求，隨機取一個代理ip，傳送，這樣我們的ip就不會被封
### 花錢買
### 白嫖
# import requests
# res=requests.get('http://demo.spiderpy.cn/get/').json()['proxy']
# print(res)
#
# proxies = {
# 'https':'https://%s'%res,
# }
# print()
#
# respone=requests.get('http://www.baidu.com',proxies=proxies)
# # respone=requests.get('http://www.baidu.com')
# print(respone.text)
### 藉助於第三方，自己搭建(讀一讀人家原始碼)
#https://github.com/jhao104/proxy_pool
- 超時時間
# respone=requests.get('https://www.baidu.com',timeout=0.0001)
- 認證（像老款路由器的登入）
# import requests
# from requests.auth import HTTPBasicAuth
# r=requests.get('xxx',auth=HTTPBasicAuth('user','password'))
# print(r.status_code)
- 異常處理
# import requests
# from requests.exceptions import * #可以檢視requests.exceptions獲取異常型別
#
# try:
# r=requests.get('http://www.baidu.com',timeout=0.00001)
# # except ReadTimeout:
# # print('===:')
# # except ConnectionError: #網路不通
# # print('-----')
# # except Timeout:
# # print('aaaaa')
#
# except Exception:
# print('Error')
- 檔案上傳
# import requests
# files={'myfile':open('1 自動處理cookie.py','rb')}
# respone=requests.post('http://127.0.0.1:8000/upload_file/',files=files)
# print(respone.text)
抽屜自動點贊
import requests
header={
'Cookie':'',
'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36'
}
# res=requests.post('https://dig.chouti.com/link/vote',data={'linkId':'31857081'},headers=header)
# print(res.text)
# 所有的都點贊，----》id解析---》bs4模組（解析xml）
res=requests.get('https://dig.chouti.com/top/24hr?_=1628136305346',headers=header).json()
for item in res['data']:
id=item['id']
res=requests.post('https://dig.chouti.com/link/vote',data={'linkId':'%s'%id},headers=header)
print(res.text)
爬取汽車之家新聞
# pip3 install beautifulsoup4
import requests
from bs4 import BeautifulSoup
for i in range(1,100):
res=requests.get('https://www.autohome.com.cn/news/%s/#liststart'%i)
# print(res.text)
# 第一個引數，要解析的內容，第二引數：使用的解析器 html.parser bs4內建的解析器 lxml
soup=BeautifulSoup(res.text,'html.parser')
# pip3 install lxml
# soup=BeautifulSoup(res.text,'lxml')
# find_all找所有
ul_list=soup.find_all(name='ul',class_='article')
# ul_list=soup.find_all(name='ul')
# print(len(ul_list))
for ul in ul_list:
li_list=ul.find_all(name='li')
for li in li_list:
h3=li.find(name='h3')
if h3:
title=h3.text # 獲取標籤的文字內容，標籤物件.text
# print(title)
desc=li.find(name='p').text
# print(desc)
img_url=li.find(name='img')['src']
if not img_url.startswith('http'):
img_url='https:'+img_url
# print(img_url)
url='https:'+li.find(name='a')['href']
print(url)
print('''
新聞標題：%s
新聞摘要：%s
新聞圖片：%s
新聞地址：%s
'''%(title,desc,img_url,url))
bs4遍歷文件樹
from bs4 import BeautifulSoup
html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body>
<p class="title"><b>The Dormouse's story <span>lqz</span></b><span>egon</span></p>
<p class="story">Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
and they lived at the bottom of a well.</p>
<p class="story">...</p>
"""
soup=BeautifulSoup(html_doc,'html.parser')
# res=soup.prettify() # 美化
# print(res)
#1、用法
# html=soup.html
# title=soup.html.head.title
# title=soup.title
# print(title)
#2、獲取標籤的名稱 ---> 標籤物件.name
# a=soup.body.a
# a=soup.a.name
# print(a)
# print(soup.body.name)
#3、獲取標籤的屬性 ---->標籤物件['標籤名']
# href=soup.body.a['href']
# attrs=soup.body.a.attrs # 所有屬性，---》字典
# href=soup.body.a.attrs['href']
# print(attrs['class'])
# c=soup.p.attrs['class']
# print(c)
#4、獲取標籤的內容
# res=soup.b.text # 拿到當前標籤子子孫所有的text
# res=soup.p.text
# res=soup.p.string # 當前標籤有且只有一個文字內容才能拿出來
# res=soup.b.string # 當前標籤有且只有一個文字內容才能拿出來
# res=soup.p.strings # 把子子孫放到生成器中
#
# print(list(res))
#5、巢狀選擇
# res=soup.html.body.p
# print(type(res)) # bs4.element.Tag
from bs4.element import Tag
####瞭解
#6、子節點、子孫節點
# print(soup.p.contents) #p下所有子節點，放到列表中
# print(soup.p.children) #得到一個迭代器,包含p下所有子節點
# for i,child in enumerate(soup.p.children):
# print(i,child)
# print(soup.p.descendants) #獲取子孫節點,p下所有的標籤都會選擇出來
# for i,child in enumerate(soup.p.descendants):
# print(i,child)
#7、父節點、祖先節點
# print(soup.a.parent) #獲取a標籤的父節點
# print(soup.body.parent)
# print(soup.a.parents) #找到a標籤所有的祖先節點，父親的父親，父親的父親的父親...
# print(list(soup.a.parents))
# print(len(list(soup.a.parents)))
#8、兄弟節點
# print(soup.a.next_sibling) #下一個兄弟
# print(soup.a.previous_sibling) #上一個兄弟
#
# print(list(soup.a.next_siblings)) #下面的兄弟們=>生成器物件
# print(list(soup.a.previous_siblings)) #上面的兄弟們=>生成器物件
bs4搜尋文件樹
from bs4 import BeautifulSoup
html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body id='body'>
<p class="title"><b>The Dormouse's story <span>lqz</span></b><span>egon</span></p>
<p class="story">Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
and they lived at the bottom of a well.</p>
<p class="story">...</p>
"""
soup=BeautifulSoup(html_doc,'html.parser')
# 搜尋文件樹 find find_all
# 五種過濾器: 字串、正則表示式、列表、True、方法
##### 字串
# res=soup.find(name='body')
# res=soup.find(name='p',class_='story')
# 查詢id為link2的標籤
# res=soup.find(id='link2',name='a',class_='sister',href='http://example.com/lacie')
# res=soup.find(href='http://example.com/lacie')
# print(res)
# res=soup.find(attrs={'class':['sister']})
# print(res)
#### 正則表示式
import re
# res=soup.find_all(name=re.compile('^b')) #找出b開頭的標籤，結果有body和b標籤
# res=soup.find(name=re.compile('^b'))
# res=soup.find_all(class_=re.compile('^s'))
# res=soup.find_all(href=re.compile('^http'))
# res=soup.find_all(id=re.compile('^l'))
# print(res)
####列表、
# res=soup.find_all(name=['body','b'])
# res=soup.find_all(id=['link1','link2'])
# res=soup.find_all(attrs={'id':['link1','link2']})
#
# print(res)
# True、
# links=soup.find_all(href=True)
# print(links)
# res=soup.find_all(name=True)
# res=soup.find_all(id=True)
# print(res)
#方法
# def has_class_but_no_id(tag):
# return tag.has_attr('class') and not tag.has_attr('id')
#
# print(len(soup.find_all(name=has_class_but_no_id)))
# 拿出當前頁面所有圖片
soup.find_all(name='img',href=True)
## 建議 遍歷文件樹和搜尋文件樹混用
# soup.body.div.find
### 其他引數 find，find_all
#limit
# soup.find()
# res=soup.find_all(name='a',href=True,limit=2) # 限制獲取的條數
# print(res)
# recursive 是否遞迴查詢
# res=soup.find_all(name='a',recursive=False)
# res=soup.find_all(name='html',recursive=False)
# print(res)
css選擇器(與xpath是通用的)
html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body>
<p class="title">
<b>The Dormouse's story <p>asdfasdf</p></b>
Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">
<span>Elsie</span>
</a>
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
<div class='panel-1'>
<ul class='list' id='list-1'>
<li class='element'>Foo</li>
<li class='element'>Bar</li>
<li class='element'>Jay</li>
</ul>
<ul class='list list-small' id='list-2'>
<li class='element'><h1 class='yyyy'>Foo</h1></li>
<li class='element xxx'>Bar</li>
<li class='element'>Jay</li>
</ul>
</div>
and they lived at the bottom of a well.
</p>
<p class="story">...</p>
"""
from bs4 import BeautifulSoup
soup=BeautifulSoup(html_doc,'html.parser')
'''
#id
.類名
標籤
標籤>標籤
標籤 標籤
'''
# res=soup.p.select('.sister') # 使用css選擇器
# res=soup.p.select('#link1') # 使用css選擇器
# res=soup.select('body>p') # 使用css選擇器 body的子標籤p
res=soup.select('body p') # 使用css選擇器 body的子子孫孫標籤p
print(len(res))
### css選擇器是通用的：bs4，lxml解析也可以是css選擇器
##css選擇器不會寫怎麼辦？
'#maincontent > div:nth-child(3) > table > tbody > tr:nth-child(13) > td:nth-child(3)'
## xpath選擇
'//*[@id="maincontent"]/div[2]/table/tbody/tr[18]/td[2]'
selenium使用
# 如果使用requests模組，傳送請求獲取的資料不全，它不能執行js
# selenium:可以使用程式碼控制模擬人操作瀏覽器
## 操作某個瀏覽器，就需要有瀏覽器驅動
# http://npm.taobao.org/mirrors/chromedriver/ 谷歌驅動的淘寶映象站
# 谷歌瀏覽器版本要跟驅動版本對應
## 92.0.4515.131 下載相應版本驅動，放到專案程式碼中
# pip3 install selenium
# from selenium import webdriver
# import time
# # 開啟一個谷歌瀏覽器
# bro=webdriver.Chrome(executable_path='chromedriver.exe')
#
# #位址列中輸入百度
# bro.get('https://www.cnblogs.com/')
#
# time.sleep(2)
#
# print(bro.page_source) #當前頁面的html內容
#
# bro.close() # 關閉瀏覽器
# import requests
#
# res=requests.get('https://dig.chouti.com/',headers={
# 'User-Agent':'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36'
# })
# print(res.text)
基本使用
from selenium import webdriver
import time
# 瀏覽器物件
bro = webdriver.Chrome(executable_path='chromedriver.exe')
bro.implicitly_wait(10) # 隱式等待，去找控制元件，如果沒有會等10s
bro.get('https://www.baidu.com/')
# sub_button=bro.find_element_by_css_selector('#s-top-loginbtn')
sub_button = bro.find_element_by_id('s-top-loginbtn') # 如果有id，優先用它
# 點選
sub_button.click()
# 找到使用者名稱密碼登入
user_btn = bro.find_element_by_xpath('//*[@id="TANGRAM__PSP_11__footerULoginBtn"]')
# user_btn=bro.find_element_by_id('TANGRAM__PSP_11__footerULoginBtn')
user_btn.click()
username = bro.find_element_by_id('TANGRAM__PSP_11__userName')
password = bro.find_element_by_id('TANGRAM__PSP_11__password')
# 往輸入框中寫東西
username.send_keys('[email protected]')
password.send_keys('lqz12345')
sumbit_btn = bro.find_element_by_id('TANGRAM__PSP_11__submit')
time.sleep(3)
sumbit_btn.click()
time.sleep(3)
bro.close()
無頭瀏覽器
from selenium import webdriver
from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_argument('window-size=1920x3000') #指定瀏覽器解析度
chrome_options.add_argument('--disable-gpu') #谷歌文件提到需要加上這個屬性來規避bug
chrome_options.add_argument('--hide-scrollbars') #隱藏滾動條, 應對一些特殊頁面
chrome_options.add_argument('blink-settings=imagesEnabled=false') #不載入圖片, 提升速度
chrome_options.add_argument('--headless') #瀏覽器不提供視覺化頁面. linux下如果系統不支援視覺化不加這條會啟動失敗
driver=webdriver.Chrome(executable_path='chromedriver.exe',chrome_options=chrome_options)
driver.get('https://www.baidu.com')
print(driver.page_source)
driver.close()
獲取元素位置，屬性，大小
from selenium import webdriver
import time
driver=webdriver.Chrome(executable_path='chromedriver.exe')
driver.get('https://kyfw.12306.cn/otn/resources/login.html')
driver.implicitly_wait(10)
user_login=driver.find_element_by_css_selector('.login-hd-account>a')
user_login.click()
time.sleep(2)
img=driver.find_element_by_id('J-loginImg')
print(img)
print(img.id) #selenium提供的id，忽略
print(img.tag_name) # 標籤名
print('-----')
print(img.location) # img標籤的位置
print(img.size) # img標籤大小
# 獲取屬性
# print(img.get_attribute('src'))
print(img.get_attribute('class'))
driver.close()
等待元素被載入
from selenium import webdriver
# 兩種等待方式
# 顯示等待
# 隱式等待：只需要寫一句話，等待所有要獲取的標籤
driver=webdriver.Chrome(executable_path='chromedriver.exe')
driver.get('https://www.baidu.com')
'''
# 兩種等待方式
# 顯示等待(忽略掉)
wait=WebDriverWait(driver,10)
wait.until(EC.presence_of_element_located((By.ID,'content_left')))
contents=browser.find_element(By.CSS_SELECTOR,'#content_left')
# 隱式等待：
-driver.implicitly_wait(10)
-driver.find_element_by_css_selector()
-只需要寫一句話，等待所有要獲取的標籤
'''
driver.implicitly_wait(10)
print(driver.page_source)
# 再找控制元件，只要沒載入成功，就會等待，最多等10s
driver.close()
元素操作
from selenium import webdriver
import time
driver=webdriver.Chrome(executable_path='chromedriver.exe')
driver.get('https://www.baidu.com')
driver.implicitly_wait(10)
## 點選，清空，輸入操作
input_search=driver.find_element_by_id('kw')
input_search.send_keys('美女') # 輸入
time.sleep(3)
input_search.clear() # 清空
time.sleep(2)
input_search.send_keys('性感美女')
time.sleep(2)
btn=driver.find_element_by_id('su')
btn.click() # 點選
time.sleep(10)
driver.close()
執行js
from selenium import webdriver
import time
driver=webdriver.Chrome(executable_path='chromedriver.exe')
driver.get('http://127.0.0.1:8000/')
driver.implicitly_wait(10)
driver.execute_script("name='egon';") # 這裡面寫js程式碼
driver.execute_script("alert(name)") # 這裡面寫js程式碼
time.sleep(5)
# driver.close()
切換選項卡
import time
from selenium import webdriver
browser=webdriver.Chrome()
browser.get('https://www.baidu.com')
browser.execute_script('window.open()')
print(browser.window_handles) #獲取所有的選項卡
# browser.switch_to_window(browser.window_handles[1])
# browser.switch_to_window(browser.window_handles[1])
browser.switch_to.window(browser.window_handles[1])
browser.get('https://www.taobao.com')
time.sleep(5)
# browser.switch_to_window(browser.window_handles[0])
browser.switch_to.window(browser.window_handles[0])
browser.get('https://www.sina.com.cn')
browser.close()
模擬前進後退
import time
from selenium import webdriver
browser=webdriver.Chrome(executable_path='chromedriver.exe')
browser.get('https://www.baidu.com')
browser.get('https://www.taobao.com')
browser.get('http://www.sina.com.cn/')
browser.back()
time.sleep(3)
browser.forward()
browser.close()
異常處理
from selenium import webdriver
from selenium.common.exceptions import TimeoutException,NoSuchElementException,NoSuchFrameException
browser = webdriver.Chrome()
try:
browser.get('http://www.baidu.com')
except Exception as e:
print(e)
finally:
browser.close()
selenium登入cnblogs獲取cookie
#selenium登入cnblogs獲取cookie
from selenium import webdriver
from selenium.common.exceptions import TimeoutException,NoSuchElementException,NoSuchFrameException
import time
import json
browser = webdriver.Chrome(executable_path='chromedriver.exe')
browser.implicitly_wait(10)
#### 登入過程
# try:
# browser.get('http://www.cnblogs.com')
# submit_btn=browser.find_element_by_link_text('登入') # a標籤的內容
# submit_btn.click()
#
# username=browser.find_element_by_id('mat-input-0')
# password=browser.find_element_by_id('mat-input-1')
# username.send_keys('[email protected]')
# password.send_keys('1111')
# input('等會')
# sub_btn=browser.find_element_by_css_selector('body > app-root > mat-sidenav-container > mat-sidenav-content > div > div > app-sign-in > app-content-container > div > div > div > form > div > button > span.mat-button-wrapper')
# sub_btn.click()
#
# # 人工參與，滑動
# input('等會')
#
# # 獲取到登入後的cookie
# print(browser.get_cookies())
#
# with open('cookie.json','w') as f:
# json.dump(browser.get_cookies(),f)
#
#
# except Exception as e:
# print(e)
# finally:
# browser.close()
### 不登入了，把cookie寫入瀏覽器
# browser.get('http://www.cnblogs.com')
# with open('cookie.json','r') as f:
# cookie=json.load(f)
# time.sleep(5)
# for item in cookie: # 設定cookie必須用字典，cookie的json檔案是列表，所以用迴圈往裡放
# browser.add_cookie(item)
#
#
#
# browser.refresh() # 重新整理頁面
#
# time.sleep(5)
#
# browser.close()
抽屜半自動點贊
from selenium import webdriver
import json
import time
#### 登入過程
# bro=webdriver.Chrome(executable_path='chromedriver.exe')
# bro.implicitly_wait(10)
# bro.get('https://dig.chouti.com/')
# try:
# sub_btn=bro.find_element_by_id('login_btn')
# print(sub_btn)
#
# # sub_btn.click() # 報錯
# bro.execute_script('arguments[0].click();',sub_btn)
#
# # username=bro.find_element_by_css_selector('body > div.login-dialog.dialog.animated2.scaleIn > div > div.login-body > div.form-item.login-item.clearfix.phone-item.mt24 > div.input-item.input-item-short.left.clearfix > input')
# username=bro.find_element_by_css_selector('div.input-item>input.login-phone')
# username.send_keys('18953675221')
# # password=bro.find_element_by_css_selector('body > div.login-dialog.dialog.animated2.scaleIn > div > div.login-footer > div.form-item.login-item.clearfix.mt24 > div')
# password = bro.find_element_by_css_selector('div.input-item>input.pwd-password-input')
# password.send_keys('lqz123')
#
# time.sleep(3)
# btn=bro.find_element_by_css_selector('body > div.login-dialog.dialog.animated2.scaleIn > div > div.login-footer > div:nth-child(4) > button')
#
# btn.click()
#
# input('等')
#
# with open('chouti.json','w') as f:
# json.dump(bro.get_cookies(),f)
#
#
#
#
# finally:
# bro.close()
import requests
bro=webdriver.Chrome(executable_path='chromedriver.exe')
bro.implicitly_wait(10)
bro.get('https://dig.chouti.com/')
# 把螢幕滑倒最底下
bro.execute_script('window.scrollTo(0, document.body.scrollHeight);')
# bro.find_elements_by_css_selector('.link-item')
cookie={}
##從檔案中讀出cookie
with open('chouti.json','r') as f:
res=json.load(f)
for item in res:
cookie[item['name']]=item['value']
print(cookie) # requests能夠使用的cookie
div= bro.find_element_by_class_name('link-con')
time.sleep(2)
header={
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36'
}
div_list=div.find_elements_by_class_name('link-item')
for div in div_list:
article_id=div.get_attribute('data-id')
print(article_id)
# 使用requests傳送請求
res=requests.post('https://dig.chouti.com/link/vote',data={'linkId': article_id},cookies=cookie,headers=header)
print(res.text)
bro.close()
打碼平臺使用
# 人工破解
# 影象識別模組---》數字，字母組合
# 驗證碼破解平臺---》雲打碼，超級鷹
-給它一張圖片---》結果返回 （收費的）
#!/usr/bin/env python
# coding:utf-8
import requests
from hashlib import md5
class Chaojiying_Client(object):
def __init__(self, username, password, soft_id):
self.username = username
password = password.encode('utf8')
self.password = md5(password).hexdigest()
self.soft_id = soft_id
self.base_params = {
'user': self.username,
'pass2': self.password,
'softid': self.soft_id,
}
self.headers = {
'Connection': 'Keep-Alive',
'User-Agent': 'Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)',
}
def PostPic(self, im, codetype):
"""
im: 圖片位元組
codetype: 題目型別 參考 http://www.chaojiying.com/price.html
"""
params = {
'codetype': codetype,
}
params.update(self.base_params)
files = {'userfile': ('ccc.jpg', im)}
r = requests.post('http://upload.chaojiying.net/Upload/Processing.php', data=params, files=files,
headers=self.headers)
return r.json()
def ReportError(self, im_id):
"""
im_id:報錯題目的圖片ID
"""
params = {
'id': im_id,
}
params.update(self.base_params)
r = requests.post('http://upload.chaojiying.net/Upload/ReportError.php', data=params, headers=self.headers)
return r.json()
if __name__ == '__main__':
chaojiying = Chaojiying_Client('306334678', 'lqz12345', '903641') # 使用者中心>>軟體ID 生成一個替換 96001
im = open('a.jpg', 'rb').read() # 本地圖片檔案路徑 來替換 a.jpg 有時WIN系統須要//
print(chaojiying.PostPic(im, 1902)) # 1902 驗證碼型別 官方網站>>價格體系 3.4+版 print 後要加()
xpath使用
1 一門在html中查詢資料的語言
2 記住的語法：
/ 取當前路徑下的xx
// 取所有路徑下的xx
. 當前路徑
.. 上一層
@ 取屬性
4 lxml解析模組提供的xpath
doc='''
<html>
<head>
<base href='http://example.com/' />
<title>Example website</title>
</head>
<body>
<div id='images'>
<a href='image1.html' name='sss'>Name: My image 1 <br /><img src='image1_thumb.jpg' /></a>
<a href='image2.html' name='lqz'>Name: My image 2 <br /><img src='image2_thumb.jpg' /></a>
<a href='image3.html'>Name: My image 3 <br /><img src='image3_thumb.jpg' /></a>
<a href='image4.html' class='li'>Name: My image 4 <br /><img src='image4_thumb.jpg' /></a>
<a href='image5.html' class='li li-item' name='items'>Name: My image 5 <br /><img src='image5_thumb.jpg' /></a>
<a href='image6.html' name='items'><span><h5>test</h5></span>Name: My image 6 <br /><img src='image6_thumb.jpg' /></a>
</div>
</body>
</html>
'''
from lxml import etree
# 傳入要解析的內容
html=etree.HTML(doc)
# res=html.xpath('//body')
# print(res)
# 1 所有節點
# a=html.xpath('//*')
# 2 指定節點（結果為列表）
# a=html.xpath('//head')
# 3 子節點，子孫節點
# a=html.xpath('//div/a')
# a=html.xpath('//body//a') #無資料
# a=html.xpath('//body//a')
# 4 父節點
# a=html.xpath('//body//a[@href="image1.html"]/..')
# a=html.xpath('//body//a')
# a=html.xpath('//body//a[@href="image1.html"]')
# a=html.xpath('//body//a[1]/..')
# 也可以這樣
# a=html.xpath('//body//a[1]/parent::*')
# a=html.xpath('//body//a[1]/parent::p')
# 5 屬性匹配
# a=html.xpath('//a[@href="image1.html"]')
# a=html.xpath('//a[@name="sss"]')
# 6 文字獲取 text()
# a=html.xpath('//a[@href="image1.html"]/text()')
# a=html.xpath('//a/text()')
# 7 屬性獲取
# a=html.xpath('//a/@href')
# a=html.xpath('//a[1]/@name')
# # 注意從1 開始取（不是從0）
# a=html.xpath('//body//a[2]/@href')
# 8 屬性多值匹配
# a 標籤有多個class類，直接匹配就不可以了，需要用contains
# a=html.xpath('//a[@class="li"]')
# a=html.xpath('//a[contains(@class,"li")]')
# a=html.xpath('//body//a[contains(@class,"li")]/text()')
# 9 多屬性匹配
# a=html.xpath('//body//a[contains(@class,"li") or @name="items"]')
# a=html.xpath('//body//a[contains(@class,"li") and @name="items"]/text()')
# a=html.xpath('//body//a[contains(@class,"li")]/text()')
# 10 按序選擇
# a=html.xpath('//a[2]/text()')
# a=html.xpath('//a[2]/@href')
# a=html.xpath('//a[2]/@name')
# 取最後一個
# a=html.xpath('//a[last()]/@href')
# 位置小於3的
# a=html.xpath('//a[position()<3]/@href')
# 倒數第二個
# a=html.xpath('//a[last()-2]/@href')
# 11 節點軸選擇
# ancestor：祖先節點
# 使用了* 獲取所有祖先節點
# a=html.xpath('//a/ancestor::*')
# # 獲取祖先節點中的div
# a=html.xpath('//a/ancestor::div')
# attribute：屬性值
# a=html.xpath('//a[1]/attribute::*')
# child：直接子節點
# a=html.xpath('//a[1]/child::*')
# a=html.xpath('//a[1]/child::img/@src')
# descendant：所有子孫節點
# a=html.xpath('//a[6]/descendant::*')
# following:當前節點之後所有節點
# a=html.xpath('//a[1]/following::*')
# a=html.xpath('//a[1]/following::*[1]/@href')
# following-sibling:當前節點之後同級節點
# a=html.xpath('//a[1]/following-sibling::*')
# a=html.xpath('//a[1]/following-sibling::a')
# a=html.xpath('//a[1]/following-sibling::*[2]/text()')
# a=html.xpath('//a[1]/following-sibling::*[2]/@href')
print(a)
自動登入12306
from selenium import webdriver
import base64
from PIL import Image
import time
from chaojiying import Chaojiying_Client
from selenium.webdriver import ActionChains
# 不讓程式檢測出是用驅動控制
from selenium.webdriver.chrome.options import Options
options = Options()
options.add_argument("--disable-blink-features=AutomationControlled")
bro=webdriver.Chrome(executable_path='./chromedriver.exe',chrome_options=options)
bro.get('https://kyfw.12306.cn/otn/resources/login.html')
bro.implicitly_wait(10)
# 把視窗設定全屏
bro.maximize_window()
try:
username_login_btn=bro.find_element_by_css_selector('.login-hd-account>a')
username_login_btn.click()
username=bro.find_element_by_id('J-userName')
password=bro.find_element_by_id('J-password')
login_btn=bro.find_element_by_id('J-login')
username.send_keys('liuqingzheng')
password.send_keys('lqz12345')
img_code=bro.find_element_by_id('J-loginImg')
print(img_code.size)
print(img_code.location)
# 獲取驗證碼圖片的兩種方案
# 方案一：整體截圖，根據位置摳出驗證碼圖片
# bro.save_screenshot('main.png') # 對整個頁面進行截圖，main.png
#
# location=img_code.location
# size=img_code.size
# print(location)
# print(size)
# #驗證碼的座標
# img_tu = (int(location['x']), int(location['y']), int(location['x'] + size['width']), int(location['y'] + size['height']))
# #使用pillow開啟截圖
# img=Image.open('./main.png')
# #從截圖中按照位置扣除驗證碼
# code_img=img.crop(img_tu)
# # 把扣出來的圖，儲存到本地
# code_img.save('./code2.png')
# 方案二：把圖片的base64編碼轉成圖片儲存到本地
img_base64=img_code.get_attribute('src')
img_base64_real=img_base64.split(',')[-1]
img_1=base64.b64decode(img_base64_real)
with open('code.jpg','wb') as f:
f.write(img_1)
# 呼叫超級鷹，完成驗證碼破解
# 呼叫超級鷹識別
chaojiying = Chaojiying_Client('306334678', 'lqz12345', '903641') # 使用者中心>>軟體ID 生成一個替換 96001
im = open('code.jpg', 'rb').read() # 本地圖片檔案路徑 來替換 a.jpg 有時WIN系統須要//
res=chaojiying.PostPic(im, 9004) # 1902 驗證碼型別 官方網站>>價格體系 3.4+版 print 後要加()
# 123,155|42,135|11,77---->[[123,155],[42,135],[11,77]]
print(res)
result=res['pic_str']
all_list = []
if '|' in result:
list_1 = result.split('|')
count_1 = len(list_1)
for i in range(count_1):
xy_list = []
x = int(list_1[i].split(',')[0])
y = int(list_1[i].split(',')[1])
xy_list.append(x)
xy_list.append(y)
all_list.append(xy_list)
else:
x = int(result.split(',')[0])
y = int(result.split(',')[1])
xy_list = []
xy_list.append(x)
xy_list.append(y)
all_list.append(xy_list)
print(all_list)
### 在頁面中點選破解的圖案
#點選 [[123,155],[42,135],[11,77]]
for item in all_list:
ActionChains(bro).move_to_element_with_offset(img_code,item[0],item[1]).click().perform()
time.sleep(1)
time.sleep(5)
login_btn.click()
time.sleep(1)
# 滑動滑塊
span=bro.find_element_by_id('nc_1_n1z')
ActionChains(bro).drag_and_drop_by_offset(span, 300, 0).perform()
time.sleep(30)
print(bro.get_cookies())
except Exception as e:
print(e)
finally:
bro.close()
bro.quit() # 關閉整個瀏覽器