1 import logging,os
 2
 3 class Fileinfo(object):
 4
 5     def __init__(self,filename):
 6         self.filename=filename
 7
 8     def __enter__(self):
 9         try:
10             with open(self.filename,'r') as new_file:
11                 new_file.seek(0)
12                 content=new_file.read()
13         except IOError:
14             return 'error'
15         else:
16             self.__exit__()
17             return content
18
19
20     def __exit__(self):
21         logging.basicConfig(level=logging.DEBUG)
22         logger=logging.getLogger()
23         logger.setLevel=(logging.DEBUG)
24         hfile=logging.FileHandler(r"C:\Users\Administrator\Desktop\sendlog.log")
25         hfile.setLevel=(logging.DEBUG)
26         formatter=logging.Formatter('[%(asctime)s]'  '%(message)s')
27         hfile.setFormatter(formatter)
28         logger.addHandler(hfile)
29
30         logging.debug(self.filename)
31
32 if __name__=='__main__':
33     c=Fileinfo('C:\\Users\\Administrator\\Desktop\\12.txt')
34     print c.__enter__()

 1 import logging,os,urllib
 2
 3 class page(object):
 4     global a
 5     def __init__(self,num):
 6         self.num=num
 7
 8     def get_page(self):
 9         try:
10             new_url=a[self.num]
11             f=urllib.urlopen(new_url)
12             if urllib.urlopen(new_url).code==404:
13                 raise Exception
14         except IndexError:
15             return u'\n超出范围'
16         except Exception:
17             self.__exit__()   #内部方法调用
18             return 'url 404 not found'
19         else:
20             return f.read()
21
22     def __exit__(self):
23         logging.basicConfig(level=logging.ERROR)
24         logger=logging.getLogger()
25         logger.setLevel=(logging.DEBUG)
26         hfile=logging.FileHandler(r"C:\Users\Administrator\Desktop\urllog.log")
27         hfile.setLevel=(logging.DEBUG)
28         formatter=logging.Formatter('[%(asctime)s]''-''%(levelname)s''-''%(message)s')
29         hfile.setFormatter(formatter)
30         logger.addHandler(hfile)
31
32         logging.error(a[self.num])
33
34 if __name__=='__main__':
35     num=int(raw_input('please input a number:\n'))
36     a=['https://wenda.so.com/q/1480716337726538','http://www.cnblogs.com/duyaya/','http://www.cn.com/d/']
37     c=page(num)
38     print c.get_page()

 1 import logging,os,urllib,re
 2
 3 class page(object):
 4     global a
 5     def __init__(self,num):
 6         self.num=num
 7
 8     def get_page(self):
 9         '''
10         1、先判断URL是否合法：
11             如果不合法，保存日志，并返回'url is wrong'
12             如果合法，判断URL是否可以打开：
13                 如果不可以打开，抛出异常
14                 如果打开，返回页面数据
15
16         '''
17         try:
18             new_url=a[self.num]
19
20             modle_url=re.compile('^(http|https)\:(\/\/|\\\\)\w+\.\w+\.(com|cn)')
21             m1=modle_url.search(new_url)
22
23             if m1==None:
24                 self.__exit__()   #内部方法调用
25                 return u'\n url不合法'
26             else:
27                 f=urllib.urlopen(new_url)
28                 if urllib.urlopen(new_url).code==404:
29                     raise Exception
30         except IndexError:
31             return u'\n超出范围'
32         except Exception:
33             return 'url 404 is not found'
34         else:
35             return f.read()
36
37     def __exit__(self):
38         logging.basicConfig(level=logging.ERROR)
39         logger=logging.getLogger()
40         logger.setLevel=(logging.DEBUG)
41         hfile=logging.FileHandler(r"C:\Users\Administrator\Desktop\urllog.log")
42         hfile.setLevel=(logging.DEBUG)
43         formatter=logging.Formatter('[%(asctime)s]''-''%(levelname)s''-''%(message)s')
44         hfile.setFormatter(formatter)
45         logger.addHandler(hfile)
46
47         logging.error(a[self.num])
48
49 if __name__=='__main__':
50     num=int(raw_input('please input a number:\n'))
51     a=['https://wenda.so.com/q/1480716337726538','http:www.cnblogs.com/duyaya/','http://www.cn.com/d/']
52     c=page(num)
53     print c.get_page()
54 #输入0，可正常打印URL信息
55 #输入1，打印 URL不合格
56 #输入2，打印 URL 404 is not find
57 #输入3，打印 超出范围