1 #!/usr/bin/env python3
  2 
  3 import json             #json Module for converting strings like dictionaries into Dictionaries
  4 import re               #re Module, Find Replacement
  5 import shutil           #copy File use
  6 shutil.copyfile('conf','conf.bak') #shutil.copyfile(Document 1, document 2): Instead of opening the file, overwrite it directly with the name of the file copy. 
  7 #Global variable function
  8 def env():

    global user_dic,insert_addr,server,weight,maxconn,insert_conf,rec,ser,wei,max #global Define a global variable so that it can be called outside the function
    user_dic = json.loads(user_input)  # Converting user input into a dictionary-like string into a dictionary
    insert_addr = list(user_dic.items())[0][0] + ' ' + list(user_dic.items())[0][1]  # Input user information first keys and values take out
    rec = list(user_dic.keys())[1]
    ser = list(user_dic[rec].keys())[0]
    wei = list(user_dic[rec].keys())[1]
    max = list(user_dic[rec].keys())[2]
    if rec in user_dic.keys():
        if ser in user_dic[rec].keys():
            server = user_dic[rec][ser]
        if wei in user_dic[rec].keys():
            weight = user_dic[rec][wei]
        if max in user_dic[rec].keys():
            maxconn = user_dic[rec][max]
        insert_conf = '%s %s %s %s %s %s %s' % (ser, server, server, wei, weight, max, maxconn)  # Format information
    else:
        print('Incorrect input')

 26 # Add Files to List Functions
 27 def list_lines():

    global lines
    with open('conf.bak', 'r') as f:
        for line in f:
            f.seek(0)  # File pointer specified to start at 0
            lines = f.readlines()  # Read each line of the file to the list lines Including line breaks\n And indent\t. 

 33
 34 def check_json_format():

    try:
        json.loads(user_input,encoding='utf-8')   #Testing user_input Is it? json Format, not exception
    except ValueError:       #Exceptional error reporting, if there is no exception, this will never go.
        return False          #Exception Error Return False
    return True             #No exception return True

 40 # Determines whether a string is a digital function

 41 def isnub(s):

    try:
        nb = float(s) #Converting a string to a number returns if it succeeds True
        return True
    except ValueError as e:
        return False #If an exception occurs, return False

 47 # Index Value Existence Function
 48 def if_index():

    try:
        lines.index(insert_index)
        return False
    except ValueError:
        return True

 54 # Judges that the input cannot be empty
 55 def if_else():

    if len(user_input) == 0:
        print('Input cannot be empty, please re-enter!')
        return True
    else:
        print('Input error, please enter json Format string!')
        return False

 62 # Output File Change
 63 def change():

    with open('conf', 'r') as f:
        print('Before modification:')
        for line in f:
            if insert_addr in line:
                print(line + next(f))
    with open('conf', 'r') as f:
        print('After modification:')
        for line in f:
            if insert_addr in line:
                print(line + next(f) + next(f))

 74 # Configuration File Add Function
 75 def increase_conf():

    global user_input,insert_index
    while True:
        user_input = input('Enter to add configuration file content:').strip()
        if check_json_format() and isnub(user_input) == False:    #If json Judgment function return True，Then for json format
            env()
            list_lines()
            if insert_addr+'\n' in lines:
                insert_index = lines.index(insert_addr+'\n')  # Obtain insert_addr+\n List lines Index location in
                if if_index():
                    lines.insert(insert_index + 2, '        ' + insert_conf + '\n')  # Insert information at the specified index position in the list
                    with open('conf', '+w') as conf:
                        conf.write(''.join(lines))  # join Write the list contents into the file to''Separation, or'\n'Separate
                    print('Already will%s add to conf In file'%(insert_conf))
                    change()
                    return True
                else:
                    print('%s stay conf Document does not exist'%(insert_addr))
                    return False
            else:
                print('%s stay conf Document does not exist'%(insert_addr))
                return False
        if if_else():
            continue
        else:
            continue

101# Profile Delete Function
102 def del_conf():

   global user_input,insert_index
    while True:
        user_input = input('Please enter configuration information that needs to be deleted:').strip()
        if check_json_format() and isnub(user_input) == False:  # If json Judgment function return True，Then for json format
            env()
            list_lines()
            if insert_addr + '\n' in lines:
                if '        '+insert_conf+'\n' in lines:
                    insert_index = lines.index('        '+insert_conf+'\n')
                    if if_index():
                        del[lines[insert_index]]
                        with open('conf', '+w') as conf:
                            conf.write(''.join(lines))  # join Write the list contents into the file to''Separation, or'\n'Separate
                        return True
                    else:
                        print('%s %s %s %s %s %s %s In document conf Medium does not exist.'%(ser, server, server, wei, weight, max, maxconn))
                        continue
                else:
                    # print('%s Non-existent conf in'%(insert_conf))
                    print('%s %s %s %s %s %s %s In document conf Medium does not exist.' % (ser, server, server, wei, weight, max, maxconn))
                    continue
            else:
                print('%s In document conf Medium does not exist.'%(insert_addr))
                continue
        if if_else():
            continue
        else:
            continue

131 # Profile Modification Function
132 def modify_conf():

   global user_input
    while True:
        user_input = input('Please enter what you need to modify:').strip()
        if check_json_format() and isnub(user_input) == False:  # If json Judgment function return True，Then for json format
            env()
            list_lines()
            if insert_addr+'\n' in lines:
                if '        '+insert_conf+'\n' in lines:
                    while True:
                        user_input =  input('It needs to be revised to read:').strip()
                        if len(user_input) == 0:
                            print('Input cannot be empty,Please re-enter!')
                            continue
                        else:
                            open('conf', 'w').write(re.sub(insert_conf, user_input,open('conf.bak').read()))#read file conf.bak in
                            # insert_conf Replace with user_input，Here re.sub Find substitutions, regular expressions.
                            print('Already will:%s\n'
                                  'Modified to:%s'%(insert_conf,user_input))
                            return True
        if if_else():
            continue
        else:
            continue

156 # Configuration File View Function
157 def see_conf():

    while True:
        user_input = input('Please enter what you need to find:').strip()
        if len(user_input) == 0:
            print('Input cannot be empty, please re-enter')
            continue
        else:
            with open('conf','r') as f:
                    for line in f:
                        if user_input in line.strip():
                            print(line)
                            print(next(f))
                            return
                    else:
                        print('Unable to find')
                        return

173 while True:
174 print ('1,% s 2,% s 3,% s 4,% s'%('increase','delete','modify','view')))
175 user_input = input ('Please select the action on the configuration file:'). strip()
176     if len(user_input) == 0:
177 print ('Input cannot be empty, please re-enter!')
178         continue
179 If user_input =='1'or user_input =='increase':
180         increase_conf()
181         break
182 If user_input =='2'or user_input =='delete':
183         del_conf()
184         break
185 if user_input =='3'or user_input =='modification':
186         modify_conf()
187         break
188 if user_input=='4'or user_input=='View':
189         see_conf()
190         break
191     else:
192 print ('incorrect input')
193         continue