英文:
|| operator not working as expected
问题
这里出了什么问题？我百分之百确定我发送了一个HTTP POST请求，但不知何故，逻辑或运算符的工作方式不符合我的预期。在第一个示例中，服务器返回405错误，而在第二个示例中，代码继续执行。
不起作用的代码：
if req.Method != http.MethodPost || req.Method != http.MethodDelete {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
起作用的代码：
if req.Method != http.MethodPost {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
英文:
What is going wrong here? I am 100% sure I am sending a HTTP POST request, but somehow the OR operator is not working as I am expecting. In the first example the server returns a 405 and in the second example the code continues executing.
not working:
if req.Method != http.MethodPost || req.Method != http.MethodDelete {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
working:
if req.Method != http.MethodPost {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
答案1
得分: 2
"不是某事" 或者 "不是另一件互斥的事" 总是会成立，对吗？
如果它是 "method post"，那么它就不会是 "delete"，反之亦然，你可能想要使用 "&&"？
英文:
(Not something) OR (not something else mutually exclusive) is always going to be true isn't it?
If it is method post, it will not be delete and vice versa , you might want && ?
答案2
得分: 0
根据Kenny Grant的说法，你可能想要思考一下逻辑。也许这就是你的意思：
// 仅允许POST或DELETE请求
if req.Method != http.MethodPost && req.Method != http.MethodDelete {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
英文:
Like Kenny Grant said, you might want to ponder about the logic. Perhaps this is what you meant:
// only allow POST or DELETE
if req.Method != http.MethodPost && req.Method != http.MethodDelete {
http.Error(res, http.StatusText(http.StatusMethodNotAllowed), http.StatusMethodNotAllowed)
return
}
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