用python爬取网页数据，python3 抓取西刺网免费代理IP并验证是否可用

爬取西祠网免费高匿代理IP并验证是否可用存到csv文件

 #导入模块import requestsimport chardetimport randomfrom scrapy.selector import Selectorfrom  telnetlib import Telnet    #这是用来验证IP是否可用import timedef getXici(url):   #定义一个抓取函数user_agent = [                   #浏览器头部"Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_8; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50","Mozilla/5.0 (Windows; U; Windows NT 6.1; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50","Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0","Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; InfoPath.3; rv:11.0) like Gecko","Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)","Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)","Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)","Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1","Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1","Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; en) Presto/2.8.131 Version/11.11","Opera/9.80 (Windows NT 6.1; U; en) Presto/2.8.131 Version/11.11","Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Maxthon 2.0)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; TencentTraveler 4.0)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; The World)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SE 2.X MetaSr 1.0; SE 2.X MetaSr 1.0; .NET CLR 2.0.50727; SE 2.X MetaSr 1.0)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; 360SE)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Avant Browser)","Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)","Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5","Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5","Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5","Mozilla/5.0 (Linux; U; Android 2.3.7; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1","MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1","Opera/9.80 (Android 2.3.4; Linux; Opera Mobi/build-1107180945; U; en-GB) Presto/2.8.149 Version/11.10","Mozilla/5.0 (Linux; U; Android 3.0; en-us; Xoom Build/HRI39) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13","Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, like Gecko) Version/6.0.0.337 Mobile Safari/534.1+","Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0","Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/20.0.019; Profile/MIDP-2.1 Configuration/CLDC-1.1) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.18124","Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; HTC; Titan)","UCWEB7.0.2.37/28/999","NOKIA5700/ UCWEB7.0.2.37/28/999","Openwave/ UCWEB7.0.2.37/28/999","Mozilla/4.0 (compatible; MSIE 6.0; ) Opera/UCWEB7.0.2.37/28/999",# iPhone 6："Mozilla/6.0 (iPhone; CPU iPhone OS 8_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/8.0 Mobile/10A5376e Safari/8536.25",]html = requests.get(url,headers = {'User-Agent':random.choice(user_agent)})code = chardet.detect(html.content)['encoding']      #寻找编码格式html.encoding = code  #解码selector = Selector(text=html.text)  #获取的网页内容parent = selector.css('#ip_list')[0]trs = parent.xpath('//tr')trs.pop(0)    #寻找标签ip_list = []for each in trs:         #通过循环抓取字段ip = each.xpath('./td[2]/text()').extract()[0]port = each.xpath('./td[3]/text()').extract()[0]ip_type = each.xpath('./td[6]/text()').extract()[0]ip_time = each.xpath('./td[9]/text()').extract()[0]if '分' in ip_time or '秒' in ip_time:          #剔除时间为秒和分的IPcontinueip_list.append([ip,port,ip_type,ip_time])#创建一个空列表用来存储可用ip变量avl_ip = []print('一共有',len(ip_list),'个待验证')for i,each in enumerate(ip_list):time.sleep(1)try:# print(each)print('正在验证第',i+1,'个ip：',each[0]+':'+each[1])Telnet(each[0],each[1],timeout=1)print(each[0]+':'+each[1],'可用')avl_ip.append(each)except:print(each[0]+':'+each[1],'不可用')   验证IP是否可用，可用的保存到列表中return avl_ip                  

#把IP拼接成直接可用格式，拼成 ‘HTTP://61.135.217.7:80’, 这种格式

 def for_scrapy(avl_ip):ips = []    #储存拼接好的IP#拼接ipfor each in avl_ip:eachip = each[2]+'://'+each[0]+':'+each[1]ips.append(eachip)return  ipsdef save(ips):  #保存自己规定保存的格式print('正在写入记事本...')   ip_str = 'ips='+str(ips)ip_str = ip_str.replace(',',',\n')with open('ips.txt','w',encoding='utf-8') as f:f.write(ip_str)def main(n): #主函数调用上面的函数for i in range(1,n):url = 'http://www.xicidaili.com/nn/'+str(i)  #每循环一次换一页抓取avl_ip=getXici(url)ips=for_scrapy(avl_ip)save(ips)main(2)