1 import os
 2 def file_handler(backend,res=None,type='fetch'):# write the function to simplify the data
 3      if type ==  'fetch':    
 4           with open('proxy.conf','r') as read_f:
 5             tag = False
 6             ret = []
 7  7         for read_line in read_f:
 8  8             if read_line.strip() = backend_data:
 9                        Tag = True
10                        continue
11                if tag and read_line.startswith('backend'):
12                        break
13                if tag:       
14                        print('\033[1;43m%s\033[0m' %read_line,end=' ')
15                        ret.append(read_line)
16           return ret
17       if type ==  'change': 
18             with open('proxy.conf','r') as read_f,with open('proxy.conf_new','w') as write_f:
19 22           Tag =False
20 23           has_write == False
21 26           for read_line in read_f:
22 27                    if read_line.strip() = backend_data:
23 28                           Tag = True
24                                continue
25                         if tag and read_line.startswith('backend'):
26                                   Tag = False
27                         if not tag:
28                                write_f.write(read_line)
29                         else:
30                                 if not has_write:
31                                     for record in res:
32                                           write_f.write(record)
33                                     has_write == True
34            
35 def fetch(data):
36  2     print('\033[1;43mThis is fetch function\033[0m')
37  3     print('\033[1;43mThe data is\033[0m')
38  5     backend_data = 'backend %s' %data
39  6     return file_handler(backend_data)
40  9                 
41 10 def add():
42 11     pass
43 12 def change():
44 13     backend = data[0]['backend']
45 14     backend_data = 'backend %s' % backend
46 15     old_server_record = '%sserver %s %s weight %s maxconn %s\n' %(' '*8,data[0]['record']['server'],data[0]['record']['server'],data[0]['record']['weight'],data[0]['record']['maxconn'])
47 16     new_server_record = '%sserver %s %s weight %s maxconn %s' %(''*8,data[1]['record']['server'],data[1]['record']['server'],data[1]['record']['weight'],data[1]['record']['maxconn'])
48 17     print('the data that user want changed is %s:' %old_server_record)
49          res = fetch(backend)
50          print('the data fron the res is %s:' %res)
51 18     if res == 0 or old_server_record not in res:
52 19            return 'There are not the content you find'
53          else:
54 20            index = res.index(old_server_record)
55 21            res[index] = new_server_record
56 24     res.insert(0,'%s\n' %backend_data)
57 25     return file_handler(backend_data,res=res,change)
58  
59          os.rename('proxy.conf','proxy.conf.back')  
60          os.rename('proxy.conf_new','proxy.conf') 
61          os.remove('proxy.conf.back') 
62 29 def delete():
63 30     pass
64 31 if __name__ =='__main__':# judge the truth
65 32     msg = 
66 33     '''
67 34     1:查询
68 35     2:添加
69 36     3:修改
70 37     4:删除
71 38     5:退出
72 39     '''
73 40     msg_dic = {
74 41         '1':fetch,
75 42         '2':add,
76 43         '3':change,
77 44         '4':delete
78 45     }
79 46     While True:
80 47         print(msg)
81 48         choice = input('Please input your choice:').strip()
82 49         if not choice:continue
83 50         if choice == '5':break
84 51         data = input('Please input your data:').strip()
85 52         if choice != 1:
86 53             data = eval(data)
87 54         msg_dic[choice](data)
88 55 #input the data: [{backend:www.oldboy1.org,record:server 2.2.2.4 2.2.2.4 weight 20 maxconn 3000},{backend:www.oldboy1.org,record:server 2.2.2.5 2.2.2.5 weight 20 maxconn 3000}]