Question

我正在创建一个旧的ASP Web应用程序的MVC版本，我需要重用现有的cookie，以便用户不必在MVC版本中重新配置他们的设置。大多数cookie的路径值为/，但其他cookie的路径值为/ scripts。具有/ scripts路径值的那些不包含在Request.Cookies中。

有谁知道如何访问和更新控制器中的/ scripts cookie？顺便说一下，我对MVC还是个新手。

理想情况下，我喜欢服务器端解决方案，但如果不可能，那么客户端解决方案应该是可行的。

由于

Answer 1

对于那些想知道为什么POST请求在c＃服务器端没有cookie的人来说。 Cookie是相对于给定路径存储的，只能在“请求任何子路径”中看到该Cookie。

因此，如果我的页面上有一条路线[Route("/Home/Dashboard/{id:int}")]，那么AJAX请求也需要相对于该路线。

例如

JavaScript：

// Set the Cookie
$.post("/Home/Dashboard/1/SaveMyThing", { myValue: "myValue" });

// Get the Cookie
$.post("/Home/Dashboard/1/DoMyThing");

C＃（.NET CORE 3.1）

[HttpPost]
[Route("/Home/Dashboard/{id:int}/SaveMyThing")]
public ActionResult SaveMyThing(int id, string myValue) {
    Response.Cookies.Append("myKey", myValue, new CookieOptions {
        Path = $"/Home/Dashboard/{id}"
    });
    return Ok();
}

[HttpPost]
[Route("/Home/Dashboard/{id:int}/DoMyThing")]
public ActionResult DoMyThing(int id) {
    ProcessMyThing(Request.Cookies["myKey"]);
    return Ok();
}

Answer 2

Server Side code to Get and Set Cookies :
        public void SetCookie(string key, string value, TimeSpan expires)
        {
            var encodedCookie = new HttpCookie(key, value);

            encodedCookie.HttpOnly = true;

            if (HttpContext.Current.Request.Cookies[key] != null)
            {
                var cookieOld = HttpContext.Current.Request.Cookies[key];
                cookieOld.Expires = DateTime.Now.Add(expires);
                cookieOld.Value = encodedCookie.Value;
                HttpContext.Current.Response.Cookies.Add(cookieOld);
            }
            else
            {
                encodedCookie.Expires = DateTime.Now.Add(expires);
                HttpContext.Current.Response.Cookies.Add(encodedCookie);
            }
        }

        public string GetCookie(string key)
        {
            string value = string.Empty;
            HttpCookie cookie = HttpContext.Current.Request.Cookies[key];

            if (cookie != null)
            {
                // For security purpose, we need to encrypt the value.
                HttpCookie decodedCookie = cookie;
                value = decodedCookie.Value;
            }
            return value;
        }




Client Side code to Get and Set cookies

    function setCookie(cname, cvalue, exdays) {
        var d = new Date();
        d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
        var expires = "expires=" + d.toGMTString();
        document.cookie = cname + "=" + cvalue + "; " + expires;
    }

    function getCookie(cname) {
        var name = cname + "=";
        var ca = document.cookie.split(';');
        for (var i = 0; i < ca.length; i++) {
            var c = ca[i];
            while (c.charAt(0) == ' ') c = c.substring(1);
            if (c.indexOf(name) != -1) {
                return c.substring(name.length, c.length);
            }
        }
        return "";
    }

Request.Cookies中不存在具有不同路径值的Cookie

2 个答案: