nodejs server 对ajax的请求

测试环境：ubuntu 16
node Version : v10.15.0

js中的enum采用var定义实现

var CMD = {
    "sys_username_passwd" :0
};
console.log(CMD['sys_username_passwd'])

js对字符串的处理，trim 只是对空白进行处理，取片段使用slice

cmd1.slice(1,-4)

nodejs server响应需要对json单独处理：

if(pathName.endsWith('.cmd')){
        var cmd1 = pathName
        console.log('cmd recorded: '+ cmd1.slice(1,-4))
        switch(CMD[cmd1.slice(1,-4)]){
            case CMD.sys_username_passwd:
                response.writeHead(200, {"content-type": contentType});
                var perm1 ={"permission":3,"name":"admin","password":"xxxx"};
                var perm2 ={"permission":3,"name":"admin1","password":"xxxx"}; 
                var perm = [perm1,perm2];
                var jsonRes = JSON.stringify({
                    "NameAndPasswd":perm,
                    "awk":"xxx",
                    "set_result":"xxx"
                });
                response.write(jsonRes);
                response.end();
        }
        
    }