ajax请求设置setRequestHeader 配置Cache-Control只有部分请求生效？

Question

ajax配置了setRequestHeader但是有部分请求请求头没有Cache-Control：no-cache，部分是有的，不知道是配置漏了什么，只有浏览器勾选了禁用缓存才全部生效。
请问有遇到过这种情况的吗？请求各位大佬解答~

        beforeSend: function (request) {
            request.setRequestHeader("Cache-Control", "no-cache");
            request.setRequestHeader("If-Modified-Since", "0");
        },


    head
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
    <meta http-equiv="Pragma" content="no-cache" />
    <meta http-equiv="Expires" content="0" />

Answer 1

可以给每个请求默认带上一个时间戳

后端返回接口的时候修改Access-Control-Max-Age:0 不缓存

添加这个

  <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
  <meta http-equiv="Pragma" content="no-cache" />
  <meta http-equiv="Expires" content="0" />

加两行:

        beforeSend: function (request) {
            request.setRequestHeader("Cache-Control", "no-cache");
            request.setRequestHeader("If-Modified-Since", "0");
            request.setRequestHeader("Pragma", "no-cache");
            request.setRequestHeader("Expires", "0");
        },

Pragma
Expires