import os #os包含改名和刪除文件函數(shù)

def file_handler(backend_data,res = None,type='fetch'):if type == 'fetch':

with open('haproxy.conf', 'r') as read_f:

tag= False #找到標志

ret =[]for read_line inread_f:if read_line.strip() == backend_data: #匹配到數(shù)據(jù)

tag =Truecontinue

if tag and read_line.startswith('backend'): #到下一個backend停止

break

if tag: #找到后讀出后面的數(shù)據(jù)

print('%s' % read_line, end='')

ret.append(read_line)returnretelif type == 'change':

with open('haproxy.conf', 'r') as read_f, \

open('haproxy.conf_new', 'w') as write_f:

tag=False

has_write=Falsefor read_line inread_f:if read_line.strip() ==backend_data:

tag=Truecontinue

if tag and read_line.startswith('backend'):

tag=Falseif nottag:

write_f.write(read_line)else:if nothas_write:for record inres:

write_f.write(record)

has_write=True

os.rename('haproxy.conf', 'haproxy.conf.bak')

os.rename('haproxy.conf_new', 'haproxy.conf')

os.remove('haproxy.conf.bak')deffetch(data):#print('這是查詢功能')

#print('用戶數(shù)據(jù)是',data)

backend_data ='backend %s' %datareturnfile_handler(backend_data)defadd():pass

#[{'backend':'www.oldboy1.org','record':{'server':'2.2.2.4','weight':20,'maxconn':3000}},{'backend':'www.oldboy1.org','record':{'server':'2.2.2.5','weight':30,'maxconn':4000}}]

defchange(data):#print('這是修改功能')

#print('用戶輸入數(shù)據(jù)是：',data)

backend = data[0]['backend'] #從用戶傳參提取www.oldboy1.org

backend_line = 'backend %s' %data[0]['backend']#內容：backend www.oldboy1.org

#拼接字符串old_server_record，把用戶傳參的源server信息整理出來

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'])#用戶傳參的目標server信息

new_server_record = '%sserver %s %s weight %s maxconn %s\n' %(' '*8,data[1]['record']['server'],

data[1]['record']['server'],

data[1]['record']['weight'],

data[1]['record']['maxconn'])print('用戶想要修改的記錄是：',old_server_record)

res=fetch(backend)print('來自change函數(shù)結果--》',res)if not res or old_server_record not inres:return '你要修改的記錄不存在'

else:

index=res.index(old_server_record)

res[index]=new_server_record

res.insert(0,'%s\n' %backend_line)

file_handler(backend_line,res=res,type='change')defdelete():pass

#Python文件里面只寫不會運行的功能，測試代碼在下面寫

if __name__ == '__main__':

msg='''1:查詢

2:添加

3:修改

4:刪除

5:退出'''msg_dic={'1':fetch,'2':add,'3':change,'4':delete,

}whileTrue:print(msg)

choice= input('請輸入你的選項：').strip()if not choice:continue

if choice == '5':breakdata= input('請輸入你的數(shù)據(jù)：').strip()if choice != '1': #查詢輸入的是字符串，其他需要處理格式化數(shù)據(jù)

data =eval(data)

res=msg_dic[choice](data)print('最終結果是————》',res)

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