python查询修改配置文件功能

阅读目录

一、python查询功能代码

1、查询修改配置文件

global
        log 127.0.0.1 local2
        daemon
        maxconn 256
        log 127.0.0.1 local2 info
defaults
        log global
        mode http
        timeout connect 5000ms
        timeout client 50000ms
        timeout server 50000ms
        option  dontlognull

listen stats :8888
        stats enable
        stats uri       /admin
        stats auth      admin:1234

frontend simon.org
        bind 0.0.0.0:80
        option httplog
        option httpclose
        option  forwardfor
        log global
        acl www hdr_reg(host) -i www.simon.org
        use_backend www.simon.org if www

backend www.simon1.org
        server 101.1000.7.9 101.1000.7.9 weight 20 maxconn 30
        server 2.2.2.7 2.2.2.7 weight 30 maxconn 4000
        server 10.10.10.1 10.10.10.1 weight 22 maxconn 2000
        server 2.2.2.5 2.2.2.5 weight 30 maxconn 4000

backend www.simon2.org
        server 3.3.3.3 3.3.3.3 weight 20 maxconn 3000
backend www.simon20.org
        server 10.10.0.10 10.10.0.10 weight 9999 maxconn 33333333333

二、实现代码如下

#_*_coding:utf-8_*_
import os
def file_handle(filename,backend_data,record_list=None,type='fetch'): #type:fetch append change
    new_file=filename+'_new'
    bak_file=filename+'_bak'
    if type == 'fetch':
        r_list = []
        with open(filename, 'r') as f:
            tag = False
            for line in f:
                if line.strip() == backend_data:
                    tag = True
                    continue
                if tag and line.startswith('backend'):
                    break
                if tag and line:
                    r_list.append(line.strip())
            for line in r_list:
                print(line)
            return r_list
    elif type == 'append':
        with open(filename, 'r') as read_file, 
                open(new_file, 'w') as write_file:
            for r_line in read_file:
                write_file.write(r_line)

            for new_line in record_list:
                if new_line.startswith('backend'):
                    write_file.write(new_line + '
')
                else:
                    write_file.write("%s%s
" % (' ' * 8, new_line))
        os.rename(filename, bak_file)
        os.rename(new_file, filename)
        os.remove(bak_file)
    elif type == 'change':
        with open(filename, 'r') as read_file, 
                open(new_file, 'w') as write_file:
            tag=False
            has_write=False
            for r_line in read_file:
                if r_line.strip() == backend_data:
                    tag=True
                    continue
                if tag and r_line.startswith('backend'):
                    tag=False
                if not tag:
                    write_file.write(r_line)
                else:
                    if not has_write:
                        for new_line in record_list:
                            if new_line.startswith('backend'):
                                write_file.write(new_line+'
')
                            else:
                                write_file.write('%s%s
' %(' '*8,new_line))
                        has_write=True
        os.rename(filename, bak_file)
        os.rename(new_file, filename)
        os.remove(bak_file)

def fetch(data):
    backend_data="backend %s" %data
    return file_handle('haproxy.conf',backend_data,type='fetch')
def add(data):
    backend=data['backend']
    record_list=fetch(backend)
    current_record="server %s %s weight %s maxconn %s" %(data['record']['server'],
                                                         data['record']['server'],
                                                         data['record']['weight'],
                                                         data['record']['maxconn'])
    backend_data="backend %s" %backend

    if not record_list:
        record_list.append(backend_data)
        record_list.append(current_record)
        file_handle('haproxy.conf',backend_data,record_list,type='append')
    else:
        record_list.insert(0,backend_data)
        if current_record not in record_list:
            record_list.append(current_record)
        file_handle('haproxy.conf',backend_data,record_list,type='change')
def remove(data):
    backend=data['backend']
    record_list=fetch(backend)
    current_record="server %s %s weight %s maxconn %s" %(data['record']['server'],
                                                         data['record']['server'],
                                                         data['record']['weight'],
                                                         data['record']['maxconn'])
    backend_data = "backend %s" % backend
    if not record_list or current_record not in record_list:
        print('33[33;1m无此条记录33[0m')
        return
    else:
        #处理record_list
        record_list.insert(0,backend_data)
        record_list.remove(current_record)
        file_handle('haproxy.conf',backend_data,record_list,type='change')
def change(data):
    backend=data[0]['backend']
    record_list=fetch(backend)

    old_record="server %s %s weight %s maxconn %s" %(data[0]['record']['server'],
                                                         data[0]['record']['server'],
                                                         data[0]['record']['weight'],
                                                         data[0]['record']['maxconn'])

    new_record = "server %s %s weight %s maxconn %s" % (data[1]['record']['server'], 
                                                        data[1]['record']['server'], 
                                                        data[1]['record']['weight'], 
                                                        data[1]['record']['maxconn'])
    backend_data="backend %s" %backend

    if not record_list or old_record not in record_list:
        print('33[33;1m无此内容33[0m')
        return
    else:
        record_list.insert(0,backend_data)
        index=record_list.index(old_record)
        record_list[index]=new_record
        file_handle('haproxy.conf',backend_data,record_list,type='change')
def qita(data):
    pass


if __name__ == '__main__':
    msg='''
    1：查询
    2：添加
    3：删除
    4：修改
    5：退出
    6:其他操作
    '''
    menu_dic={
        '1':fetch,
        '2':add,
        '3':remove,
        '4':change,
        '5':exit,
        '6':qita,
    }
    while True:
        print(msg)
        choice=input("操作>>: ").strip()
        if len(choice) == 0 or choice not in menu_dic:continue
        if choice == '5':break

        data=input("数据>>: ").strip()

        #menu_dic[choice](data)==fetch(data)
        if choice != '1':
            data=eval(data)
        menu_dic[choice](data) #add(data)




# [{'backend':'www.simon20.org','record':{'server':'2.2.2.3','weight':20,'maxconn':3000}},{'backend':'www.simon10.org','record':{'server':'10.10.0.10','weight':9999,'maxconn':33333333333}}]