爬虫扩展

目录

• 爬取西刺代理
  • 爬虫 + 网站 --》 代理 解析
  • 爬取
  • 验证：
  • 执行：

爬取西刺代理

爬虫 + 网站 --》 代理 解析

from bs4 import BeautifulSoup
import requests
import http.client
import threading

inFile = open('proxy.txt')     # 所有爬到的代理
outFile = open('verified.txt', 'w')   # 所有可用代理
lock = threading.Lock()

爬取

def getProxyList(targeturl="http://www.xicidaili.com/nn/"):
    countNum = 0
    proxyFile = open('proxy.txt', 'a')

    requestHeader = {
        'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36"}

    for page in range(1, 10):    # 爬取的Page数量
        url = targeturl + str(page)
        # print url
        req = requests.get(url, headers=requestHeader)
        html_doc = req.text

        soup = BeautifulSoup(html_doc, "html.parser")
        # print soup
        trs = soup.find('table', id='ip_list').find_all('tr')
        for tr in trs[1:]:
            tds = tr.find_all('td')
            # 国家
            if tds[0].find('img') is None:
                nation = '未知'
                locate = '未知'
            else:
                nation = tds[0].find('img')['alt'].strip()
                locate = tds[3].text.strip()
            ip = tds[1].text.strip()
            port = tds[2].text.strip()
            anony = tds[4].text.strip()
            protocol = tds[5].text.strip()
            speed = tds[6].find('div')['title'].strip()
            time = tds[8].text.strip()

            proxyFile.write('%s|%s|%s|%s|%s|%s|%s|%s
' % (nation, ip, port, locate, anony, protocol, speed, time))
            print('%s=%s:%s' % (protocol, ip, port))
            countNum += 1

    proxyFile.close()
    return countNum

验证：

def verifyProxyList():
    '''
    验证代理的有效性
    '''
    requestHeader = {
        'User-Agent': "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.80 Safari/537.36"}
    myurl = 'http://www.baidu.com/'

    while True:
        lock.acquire()
        ll = inFile.readline().strip()
        lock.release()
        if len(ll) == 0: break
        line = ll.split('|')
        protocol = line[5]
        ip = line[1]
        port = line[2]

        try:
            conn = http.client.HTTPConnection(ip, port, timeout=5.0)
            conn.request(method='GET', url=myurl, headers=requestHeader)
            res = conn.getresponse()
            lock.acquire()
            print("+++Success:" + ip + ":" + port)
            outFile.write(ll + "
")
            lock.release()
        except:
            print("---Failure:" + ip + ":" + port)

执行：

if __name__ == '__main__':
    tmp = open('proxy.txt', 'w')
    tmp.write("")
    tmp.close()

    proxynum = getProxyList("http://www.xicidaili.com/nn/")
    print(u"国内高匿：" + str(proxynum))
    proxynum = getProxyList("http://www.xicidaili.com/nt/")
    print(u"国内透明：" + str(proxynum))
    proxynum = getProxyList("http://www.xicidaili.com/wn/")
    print(u"国外高匿：" + str(proxynum))
    proxynum = getProxyList("http://www.xicidaili.com/wt/")
    print(u"国外透明：" + str(proxynum))

    print(u"
验证代理的有效性：")

    all_thread = []
    for i in range(30):
        t = threading.Thread(target=verifyProxyList)   # 爬取的线程数
        all_thread.append(t)
        t.start()

    for t in all_thread:
        t.join()

    inFile.close()
    outFile.close()
    print("All Done.")