javascript - 对于 HTTP OPTIONS 请求，拥有响应正文有什么意义吗？

Question

目前，如果我响应选项请求，则无需发送我所知道的任何响应正文，只需发送 header 来指示我将接受的内容

<?php
    header("Access-Control-Allow-Origin: example.com");

    header("Access-Control-Allow-Methods: OPTIONS, GET, POST, PUT");
    header("Access-Control-Allow-Headers: API-Key, Query-Sequence");
    header("Access-Control-Expose-Headers: Query-Sequence");

    if($_SERVER['REQUEST_METHOD'] == 'OPTIONS'){
        die;
    }
    //....

但是是否会有 body 被用来做某事的情况呢？

Answer 1

来自the specification :

The response body, if any, SHOULD also include information about the communication options. The format for such a body is not defined by this specification, but might be defined by future extensions to HTTP.

您可以包含它，如果您这样做，它可能应该是允许的选项的简单英语描述。但这样做没有多大意义。