day2 文件实例

old = input(‘你要修改原来的内容：‘)
new = input(‘输入修改后的内容：‘)
with open(‘old‘,‘r‘,encoding=‘utf-8‘) as f,    open(‘new‘,‘a‘,encoding=‘utf-8‘) as f1:#old旧的文件，new新的文件
    for line in f:
        if old in line:
            line = line.replace(old,new)
        f1.write(line)#将替换后的内容写入新文件

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

backend www.oldboy.org
        server 100.1.7.9 100.1.7.9 weight 20 maxconn 3000

# Author Cathy
current_index = -1
dict_all = {}
old_content = []
#将backend下的内容找到，并且变成字典的形式
with open("haproxy","r",encoding=‘utf-8‘) as f:
    for index,line in enumerate(f):

        if line.startswith("backend"):#判断是否是以backend为开头的
            current_index = index + 1#将下标置为0
            nod = line.strip().split()[1]#将‘backend www.oldboy.org‘转换成列表，并且删除前后的空格，以中间空格分成列表,nod为www.oldboy.org
            dict_all["backend"] = nod#生成一个{‘bakend‘: ‘www.oldboy.org‘}字典
        elif index == current_index:
                dict_all["record"] = {}
                dict_all["record"]["server"] = line.strip().split()[1],line.strip().split()[2]
                dict_all["record"]["weight"] = line.strip().split()[4]
                dict_all["record"]["maxconn"] = line.strip().split()[6]
        else:
            old_content.append(line.strip())

    print(‘以下功能可使用：\n1.查询\n2.修改\n3.删除\n4.退出\n‘)
    flag = True
    while flag:
        option = int(input(‘请输入功能编号：‘))
        #查询

        if option == 1:
            backend_1 = input(‘请输入你要查询baclend下的节点：‘)
            for line in dict_all:
                if backend_1 in dict_all[line]:
                    print(dict_all)
                else:
                    continue

        #修改
        elif option == 2:
            backend_2 = input(‘请输入你要修改baclend下的节点：‘)
            dict_all["backend"]= backend_2
            dict_all["record"] = {}
            dict_all["record"]["server"] = input(‘输入server：‘)
            dict_all["record"]["weight"] = input(‘输入weight：‘)
            dict_all["record"]["maxconn"] = input(‘输入maxconn：‘)

        #删除
        elif option ==3:
            backend_3 = input(‘请输入你要删除baclend下的节点：‘)
            if backend_3 == dict_all[‘backend‘]:
                dict_all= {}
                print("删除成功！")
            else:
                print("没有这个节点，重新输入！")

        elif option == 4:
            for i in old_content:
                f = open("haproxy_new", "a")
                f.write("%s\n"%i)
            if dict_all != {}:
                open("haproxy_new", "a").write("backend %s\n\tserver%s weight %s maxconn %s\n\n" % (
                dict_all["backend"], dict_all["record"]["server"], dict_all["record"]["weight"],
                dict_all["record"]["maxconn"]))
                f.close()
            flag = False

        else:
            pass