c# – 这是一个语义违反封装的例子,如果是这样,我该如何解决？

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如果我有像这样的服务器接口…

interface IServer
{
    void Login();
    void Post();
    void Get();
}

…除非你先完成登录,否则Post和Get不起作用.它是否是对封装的语义违反,因为它使得您对接口的使用隐含地依赖于实现？你会怎么解决它？

解决方法:

我的想法：

interface IServer 
{
    ISession Authenticate();
}

interface ISession 
{
    IServer Server{get;}
    void Post();
    void Get();
}

如果您可以接触“泥”,请忽略它：

[泥]

to clarify this: imho you have to think about software design as you
would create a product… do you really want a safe for all your
valueable things where you can push a button “open” instead of FIRST
input the code on it? this is just an analogy for your use-case…

an implementator can just call post and get before he validates…

another widely used approach are access-tokens and the use of it like
here:’

interface IServer{ // returns the required token string
Authenticate(); void Post(string token); void Get(string token);
}

but i think, that’s wrong too…

you can see and maybe call methods, which you are not allowed to
see/call before login… if the implementator just not checks if
“token” is correct, you have a security risk in here…

if you divide the logic into several layers (guest/unauthenticated,
authenticated/session, and (for example) adminsession) you get clean
separation of logic and a lot more semantic usefullness….

I PERSONALLY write code EVER in way, that good framework-builders would write code… it has the be reuseable, even after years, very
easy and clear.

[/泥]

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