个人博客：凌霄的博客
准备
-
必须环境：
- Python3
开始
- 先实现一个简单的版本，直接上代码：
import urllib.request
import urllib.error
#创建get方法
def get(url):
code=urllib.request.urlopen(url).code
return code
if __name__ == '__main__':
#设置一些基本属性
url = "http://lx.nextdev.cn"
user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36"
headers = {'User-Agent':user_agent}
req = urllib.request.Request(url, headers=headers)
#记录次数
i = 1
while 1:
code = get(url)
print('访问:'+str(code))
i = i+1
简单粗暴，刷的只是 pv,ip 没变，容易被搜索引擎发现，下面我们来改进一下
增加代理功能
- 给
get方法添加以下代码：
random_proxy = random.choice(proxies)
proxy_support = urllib.request.ProxyHandler({"http":random_proxy})
opener = urllib.request.build_opener(proxy_support)
urllib.request.install_opener(opener)
- 修改一下主方法：
if __name__ == '__main__':
url = "http://lx.nextdev.cn"
#添加代理列表，可以自行去百度获取
proxies = ["124.88.67.22:80","124.88.67.82:80","124.88.67.81:80","124.88.67.31:80","124.88.67.19:80","58.23.16.240:80"]
user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36"
headers = {'User-Agent':user_agent}
req = urllib.request.Request(url, headers=headers)
i = 1
while 1:
#添加参数
code = get(url,proxies)
print('第'+str(i)+'次代理访问:'+str(code))
i = i+1
这样差不多了，不过有个 bug ，如果页面打不开了或者代理失效了，程序就自动结束了，接下来我们添加异常处理功能
异常处理
- 定义
mail方法 ，用来发邮件提醒
def mail(txt):
_user = "你的账号"
_pwd = "你的密码"
_to = "收件账号"
msg = MIMEText(txt, 'plain', 'utf-8')
#标题
msg["Subject"] = "代理失效！"
msg["From"] = _user
msg["To"] = _to
try:
#这里我用的qq邮箱
s = smtplib.SMTP_SSL("smtp.qq.com", 465)
s.login(_user, _pwd)
s.sendmail(_user, _to, msg.as_string())
s.quit()
print("Success!")
except smtplib.SMTPException as e:
print("Falied,%s" % e)
- 然后我们修改一下主方法：
if __name__ == '__main__':
url = "http://lx.nextdev.cn"
proxies = ["124.88.67.22:80","124.88.67.82:80","124.88.67.81:80","124.88.67.31:80","124.88.67.19:80","58.23.16.240:80"]
user_agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.63 Safari/537.36"
headers = {'User-Agent':user_agent}
req = urllib.request.Request(url, headers=headers)
i = 1
while 1:
try:
code = get(url,proxies)
print('第'+str(i)+'次代理访问:'+str(code))
i = i+1
except urllib.error.HTTPError as e:
print(e.code)
#添加mail方法
mail(e.code)
except urllib.error.URLError as err:
print(err.reason)
#添加mail方法
mail(err.reason)
完成！
结语
代码只有短短的 50 行，程序还可以改进：
例如：代理列表自动获取，添加界面
欢迎评论
