-
以后再也不用擔心寫爬蟲ip被封，不用擔心沒錢買代理ip的煩惱了
在使用python寫爬蟲時候，你會遇到所要爬取的網站有反爬取技術比如用同一個IP反復爬取同一個網頁，很可能會被封。如何有效的解決這個問題呢？我們可以使用代理ip，來設置代理ip池。
現在教大家一個可獲取大量免費有效快速的代理ip方法，我們訪問西刺免費代理ip網址
這里面提供了許多代理ip，但是我們嘗試過后會發現并不是每一個都是有效的。所以我們現在所要做的就是從里面提供的篩選出有效快速穩定的ip。
以下介紹的免費獲取代理ip池的方法：
優點：免費、數量多、有效、速度快
缺點：需要定期篩選
主要思路：
從網址上爬取ip地址并存儲
驗證ip是否能使用-（隨機訪問網址判斷響應碼）
格式化ip地址
代碼如下：
1.導入包
import requests
from lxml import etree
import time
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2.獲取西刺免費代理ip網址上的代理ip
def get_all_proxy():
url = 'http://www.xicidaili.com/nn/1'
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36',
}
response = requests.get(url, headers=headers)
html_ele = etree.HTML(response.text)
ip_eles = html_ele.xpath('//table[@id="ip_list"]/tr/td[2]/text()')
port_ele = html_ele.xpath('//table[@id="ip_list"]/tr/td[3]/text()')
proxy_list = []
for i in range(0,len(ip_eles)):
proxy_str = 'http://' + ip_eles[i] + ':' + port_ele[i]
proxy_list.append(proxy_str)
return proxy_list
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3.驗證獲取的ip
def check_all_proxy(proxy_list):
valid_proxy_list = []
for proxy in proxy_list:
url = 'http://www.baidu.com/'
proxy_dict = {
'http': proxy
}
try:
start_time = time.time()
response = requests.get(url, proxies=proxy_dict, timeout=5)
if response.status_code == 200:
end_time = time.time()
print('代理可用：' + proxy)
print('耗時:' + str(end_time - start_time))
valid_proxy_list.append(proxy)
else:
print('代理超時')
except:
print('代理不可用--------------->'+proxy)
return valid_proxy_list
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4.輸出獲取ip池
if __name__ == '__main__':
proxy_list = get_all_proxy()
valid_proxy_list = check_all_proxy(proxy_list)
print('--'*30)
print(valid_proxy_list)
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技術能力有限歡迎提出意見，保證積極向上不斷學習
————————————————
版權聲明：本文為CSDN博主「彬小二」的原創文章，遵循 CC 4.0 BY-SA 版權協議，轉載請附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qq_39884947/article/details/86609930
標簽：
python
ip
代理
防止
上傳時間：
2019-11-15
上傳用戶：fygwz1982
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2020-05-25
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標簽：
Performance
LTE
and
its
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2020-05-27
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The wide deployment of wireless networks and mobile technologies, along with the
significant increase in the number of mobile device users, have created a very strong
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標簽：
Wireless-Based
Software
Systems
上傳時間：
2020-06-01
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trol theory considered as a foundation for the design of computer control
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標簽：
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上傳時間：
2020-06-10
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標簽：
開關電源
上傳時間：
2021-11-23
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標簽：
pads
上傳時間：
2021-11-28
上傳用戶：
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高清電子書-C++ Primer Plus, 第6版英文版 1438頁Learning C++ is an adventure of discovery, particularly because the language accommodates several programming paradigms, including object-oriented programming,
generic programming, and the traditional procedural programming.The fifth edition of
this book described the language as set forth in the ISO C++ standards, informally
known as C++99 and C++03, or, sometimes as C++99/03. (The 2003 version was
largely a technical correction to the 1999 standard and didn’t add any new features.)
Since then, C++ continues to evolve.As this book is written, the international C++
Standards Committee has just approved a new version of the standard.This standard had
the informal name of C++0x while in development, and now it will be known as
C++11. Most contemporary compilers support C++99/03 quite well, and most of the
examples in this book comply with that standard. But many features of the new standard
already have appeared in some implementations, and this edition of C++ Primer Plus
explores these new features.
C++ Primer Plus discusses the basic C language and presents C++ features, making
this book self-contained. It presents C++ fundamentals and illustrates them with short,
to-the-point programs that are easy to copy and experiment with.You learn about
input/output (I/O), how to make programs perform repetitive tasks and make choices,
the many ways to handle data, and how to use functions.You learn about the many
features C++ has added to C, including the followi
標簽：
C++
上傳時間：
2022-02-19
上傳用戶：trh505
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《HeadFirstJava》是一本完整地面向對象(object-oriented，OO)程序設計和Java的學習指導用書，根據學習理論所設計，你可以從程序語言的基礎開始，到線程、網絡與分布式程序等項目。重要的是，你可以學會如何像一個面向對象開發者一樣去思考，而且不只是讀死書。 在這里，你可以會玩游戲、拼圖、解謎題以及以意想不到的方式與Java交互。 在這些活動中，你還會寫出一堆真正的Java程序，如一個船艦炮戰游戲和一個網絡聊天程序等等。 “HeadFirst系列”圖文并茂學習方式能讓你快速地在腦海中掌握住知識，敞開心胸準備好學習這些關鍵性的主題： ★Java程序語言 ★面向對象程序開發 ★Swing圖形化接口 ★使用JavaAPI函數庫 ★編寫、測試與布署應用程序 ★處理異常；多線程 ★網絡程序設計 ★集合與泛型
標簽：
java
上傳時間：
2022-06-12
上傳用戶：
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標簽：
rfid
上傳時間：
2022-06-25
上傳用戶：
