python crawl

来源：互联网发布：家庭网络改造设计方案编辑：程序博客网时间：2024/05/16 12:08
python爬虫下载页面代码备用。
# -*- coding:utf-8 -*-import requestsimport reimport randomclass download:    def __init__(self):        self.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"        ]        self.iplist = []    def get(self, url, timeout, proxy=None, num_retries = 6):        UA = random.choice(self.user_agent_list)        headers = {            'User-Agent': UA,            'Accept': "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",            'Accept-Encoding': 'gzip, deflate, sdch',        }        if proxy == None:            try:                response = requests.get(url, headers = headers)                return response            except:                if num_retries > 0:                    time.sleep(10)                    print(u'获取网页出错，10S后将获取倒数第：', num_retries, u'次')                    return self.get(url, timeout, num_retries-1)                else:                    print(u'开始使用代理')                    time.sleep(10)                    IP = ''.join(str(random.choice(self.iplist)).strip())                    proxy = {'http': IP}                    return self.get(url, timeout, proxy,)        else:            try:                IP = ''.join(str(random.choice(self.iplist)).strip())                proxy = {'http': IP}                response = requests.get(url, headers=headers, proxies = proxy)                return response             except:                if num_retries > 0:                    time.sleep(10)                    IP = ''.join(str(random.choice(self.iplist)).strip())                    proxy = {'http': IP}                    print(u'获取网页出错，10S后将获取倒数第：', num_retries, u'次')                    print(u'开始使用代理')                    return self.get(url, timeout, proxy, num_retries-1)                else:                    print(u'代理也不好使了！取消代理')                    return self.get(url, 3)    def analysis(self):        html = self.get("http://haoip.cc/tiqu.htm", 3)        iplistn = re.findall(r'r/>(.*?)<b', html.text, re.S)        for ip in iplistn:            i = re.sub('\n', '', ip)            self.iplist.append(i.strip())            print(i.strip())        print (self.iplist)Download = download()Download.analysis()
0 0