您好,登錄后才能下訂單哦!
這篇文章主要介紹了java如何建立爬蟲代理ip池,具有一定借鑒價值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
步驟說明
1、要從提供代理ip的網站上抓取ip。
2、初步過濾捕獲的ip。例如,從一開始就過濾IP類型不是HTTPS,IP鏈接速度超過2秒。
3、對于符合要求的IP,進行質量檢查,判斷是否可用。這一步是檢查IP的質量,也就是說這一步刷掉了很多IP。
4、將符合要求的ip寫入Redis數據庫,并以List形式存儲在Redis中。
5、設置一個抓取周期來更新您的IP代理池(抓取并處理新的IP后,我們清空原始數據庫,并將新的IP寫入其中)
實例
#!/usr/bin/env python3 # -*- coding: utf-8 -*- import requests,threading,datetime from bs4 import BeautifulSoup import random """ 1、抓取代理網站的代理ip 2、并根據指定的目標url,對抓取到ip的有效性進行驗證 3、最后存到指定的path """ # ------------------------------------------------------文檔處理-------------------------------------------------------- # 寫入文檔 def write(path,text): with open(path,'a', encoding='utf-8') as f: f.writelines(text) f.write('\n') # 清空文檔 def truncatefile(path): with open(path, 'w', encoding='utf-8') as f: f.truncate() # 讀取文檔 def read(path): with open(path, 'r', encoding='utf-8') as f: txt = [] for s in f.readlines(): txt.append(s.strip()) return txt # ---------------------------------------------------------------------------------------------------------------------- # 計算時間差,格式: 時分秒 def gettimediff(start,end): seconds = (end - start).seconds m, s = divmod(seconds, 60) h, m = divmod(m, 60) diff = ("%02d:%02d:%02d" % (h, m, s)) return diff # ---------------------------------------------------------------------------------------------------------------------- # 返回一個隨機的請求頭 headers def getheaders(): user_agent_list = [ \ "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/22.0.1207.1 Safari/537.1" \ "Mozilla/5.0 (X11; CrOS i686 2268.111.0) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11", \ "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1092.0 Safari/536.6", \ "Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.6 (KHTML, like Gecko) Chrome/20.0.1090.0 Safari/536.6", \ "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/19.77.34.5 Safari/537.1", \ "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.9 Safari/536.5", \ "Mozilla/5.0 (Windows NT 6.0) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.36 Safari/536.5", \ "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3", \ "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3", \ "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_0) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1063.0 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1062.0 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.1) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.1 Safari/536.3", \ "Mozilla/5.0 (Windows NT 6.2) AppleWebKit/536.3 (KHTML, like Gecko) Chrome/19.0.1061.0 Safari/536.3", \ "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24", \ "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/535.24 (KHTML, like Gecko) Chrome/19.0.1055.1 Safari/535.24" ] UserAgent=random.choice(user_agent_list) headers = {'User-Agent': UserAgent} return headers # -----------------------------------------------------檢查ip是否可用---------------------------------------------------- def checkip(targeturl,ip): headers =getheaders() # 定制請求頭 proxies = {"http": "http://"+ip, "https": "http://"+ip} # 代理ip try: response=requests.get(url=targeturl,proxies=proxies,headers=headers,timeout=5).status_code if response == 200 : return True else: return False except: return False #-------------------------------------------------------獲取代理方法---------------------------------------------------- # 免費代理 XiciDaili def findip(type,pagenum,targeturl,path): # ip類型,頁碼,目標url,存放ip的路徑 list={'1': 'http://www.xicidaili.com/nt/', # xicidaili國內普通代理 '2': 'http://www.xicidaili.com/nn/', # xicidaili國內高匿代理 '3': 'http://www.xicidaili.com/wn/', # xicidaili國內https代理 '4': 'http://www.xicidaili.com/wt/'} # xicidaili國外http代理 url=list[str(type)]+str(pagenum) # 配置url headers = getheaders() # 定制請求頭 html=requests.get(url=url,headers=headers,timeout = 5).text soup=BeautifulSoup(html,'lxml') all=soup.find_all('tr',class_='odd') for i in all: t=i.find_all('td') ip=t[1].text+':'+t[2].text is_avail = checkip(targeturl,ip) if is_avail == True: write(path=path,text=ip) print(ip) #-----------------------------------------------------多線程抓取ip入口--------------------------------------------------- def getip(targeturl,path): truncatefile(path) # 爬取前清空文檔 start = datetime.datetime.now() # 開始時間 threads=[] for type in range(4): # 四種類型ip,每種類型取前三頁,共12條線程 for pagenum in range(3): t=threading.Thread(target=findip,args=(type+1,pagenum+1,targeturl,path)) threads.append(t) print('開始爬取代理ip') for s in threads: # 開啟多線程爬取 s.start() for e in threads: # 等待所有線程結束 e.join() print('爬取完成') end = datetime.datetime.now() # 結束時間 diff = gettimediff(start, end) # 計算耗時 ips = read(path) # 讀取爬到的ip數量 print('一共爬取代理ip: %s 個,共耗時: %s \n' % (len(ips), diff)) #-------------------------------------------------------啟動----------------------------------------------------------- if __name__ == '__main__': path = 'ip.txt' # 存放爬取ip的文檔path targeturl = 'http://www.cnblogs.com/TurboWay/' # 驗證ip有效性的指定url getip(targeturl,path)
感謝你能夠認真閱讀完這篇文章,希望小編分享的“java如何建立爬蟲代理ip池”這篇文章對大家有幫助,同時也希望大家多多支持億速云,關注億速云行業資訊頻道,更多相關知識等著你來學習!
免責聲明:本站發布的內容(圖片、視頻和文字)以原創、轉載和分享為主,文章觀點不代表本網站立場,如果涉及侵權請聯系站長郵箱:is@yisu.com進行舉報,并提供相關證據,一經查實,將立刻刪除涉嫌侵權內容。