函数是否有可能在Golang中赤裸裸地返回错误？

Question

I have a set of constructs like this:

func LoginUser(w http.ResponseWriter, req *http.Request) {
    // do some check here 
    if err != nil {
        ReturnErrorResponse(w, errors.LoginError)
        return
    }

    // do some check here 
    if err != nil {
        ReturnErrorResponse(w, errors.BannedUserError)
        return
    }

    //success
}

I wonder if it's possible to get rid of these returns and somehow embed them into the ReturnErrorResponse function?

So, if an error happens, I return a JSONified response with error code and make a naked return.

Answer 1

It's possible by calling panic() e.g. in your ReturnErrorResponse() function (after sending back the error), but it's neither idiomatic nor efficient.

Using panic() would of course require to call recover() in a deferred function, which could be done in one place, e.g. in a "master" handler passed to http.ListenAndServe().

What you're doing is the proper way. Do not use panic() for this.