ie7 cookie 在我的网站上没有被阻止

Question

我正在为我的客户的网站添加一项功能，如果禁用 cookie，则会在登录页面上显示一个 div。我首先开始在 chrome 中测试这个，关闭 cookie，然后

if (document.cookies == "") {
    // show div to tell users cookies are disabled on their machine.
}

一切正常。同样在我的 Page_Load 代码隐藏中，我试图设置一个 cookie

protected void Page_Load(object sender, EventArgs e) 
{
    Response.Cookies["test"].Value = "test";
    Response.Cookies["test"].Expires = DateTime.Now.AddDays(1);
}

在 chrome 的土地上一切似乎都很好。接下来，我转到 IE7，阻止所有 cookie，并且为了安全起见，删除我所有的历史记录和 cookie，以防万一。我希望看到我的 div，但没有。

所以，我在 if (document.cookies == "" ) { } 中添加了一个 else 来读取 javascript 中的 cookie，果然有我的测试 cookie。

我进入工具 -> 互联网选项 -> 隐私选项卡 -> 并将滑块一直移动到顶部，“阻止所有 Cookie”。在隐私选项卡中，我单击了“高级”按钮并设置了第一方 cookie 和第三方 cookie 来提示。我觉得应该屏蔽掉。

例如，作为测试，我在 ie7 中访问 google.com，它会提醒我是否要允许或阻止来自 google 的两个 cookie。

我需要做些什么来检查 ie7 中禁用的 cookie 吗？

我创建了一个 cookies.js 文件，用于创建、读取和删除

function createCookie(name, value, days) {
    var expires = "";
    if (days) {
        var date = new Date();
        date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
        expires = "; expires=" + date.toGMTString();
     }

     document.cookie = name + "=" + value + expires + "; path=/";
}

function readCookie(name) {

    //  we're going to search for the name of the cookie, followed by an =. So create this new string and put it in nameEQ
    var nameEQ = name + "=";

    //  split document.cookie on the semicolons. ca becomes an array containing all cookies that are set for this domain and path.
    var ca = document.cookie.split(';');

    for (var i = 0; i < ca.length; i++) {

        //  set c to the cookie to be checked.
        var c = ca[i];

        //  if the first character is a space, remove it by using the 'substring()' method. continue doing this until the first character is not a space.
        while (c.charAt(0) == ' ') c = c.substring(1, c.length);

        //  now string c begins with the name of the current cookie. if this is the name of the desired cookie, we've found what we are looking for.
        //  we now only need to return the value of the cookie, which is the part of c that comes after nameEQ. By 
        //  returning this value we also end the function: mission accomplished.
        if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);

    }

    //  if after having gone through all cookies, we haven't found the name we are looking for, the cookie is not present, just return null.
    return null;

}

function eraseCookie(name) {
    createCookie(name, "", -1);
}

function cookiesEnabled() {
    if (document.cookies == "") {
       return false;
    }

    return true;
}

刚刚下载了 jquery.cookie.js，在我的检查 cookie 是否启用的函数中，我有这个：

function cookiesEnabled() {
    var TEST_COOKIE = 'test_cookie';
    $.cookie(TEST_COOKIE, true);
    if ($.cookie(TEST_COOKIE)) {
        $.cookie(TEST_COOKIE, null);
        return true;
    }
    return false;
}

这适用于 chrome 和 firefox，但不适用于 ie7。

我也试过这个：

function cookiesEnabled() {
    var cookieEnabled = (navigator.cookieEnabled) ? true : false;

    if (typeof navigator.cookieEnabled === "undefined" && !cookieEnabled) {
        document.cookie = "testcookie";
        cookieEnabled = (document.cookie.indexOf("testcookie") != -1) ? true : false;
    }

    return cookieEnabled;
}

这确实有效。我认为在某一时刻或 navigator.cookieEnabled 由 ie 支持，但似乎 chrome 和 firefox 也支持它。

这件事真的开始让我紧张了！！！

Answer 1

这是我找到的一个旧测试。

它仍然适用于 IE 吗？

对于其他浏览器，它需要一个 setCookie、getCookie 和 delCookie 函数，如果需要我也有这些函数

function isCookieEnabled() {
   if (document.all) return navigator.cookieEnabled;
   setCookie('testcookie',today.getTime());
   var tc = getCookie('testcookie');
   delCookie('testcookie');
   return (tc == today.getTime());
}

/* Cookie functions originally by Bill Dortsch */
function setCookie (name,value,expires,path,theDomain,secure) { 
   value = escape(value);
   var theCookie = name + "=" + value + 
   ((expires)    ? "; expires=" + expires.toGMTString() : "") + 
   ((path)       ? "; path="    + path   : "") + 
   ((theDomain)  ? "; domain="  + theDomain : "") + 
   ((secure)     ? "; secure"            : ""); 
   document.cookie = theCookie;
} 

function getCookie(Name) { 
   var search = Name + "=" 
   if (document.cookie.length > 0) { // if there are any cookies 
      offset = document.cookie.indexOf(search) 
      if (offset != -1) { // if cookie exists 
         offset += search.length 
         // set index of beginning of value 
         end = document.cookie.indexOf(";", offset) 
         // set index of end of cookie value 
         if (end == -1) end = document.cookie.length 
         return unescape(document.cookie.substring(offset, end)) 
      } 
   } 
} 
function delCookie(name,path,domain) {
   if (getCookie(name)) document.cookie = name + "=" +
      ((path)   ? ";path="   + path   : "") +
      ((domain) ? ";domain=" + domain : "") +
      ";expires=Thu, 01-Jan-70 00:00:01 GMT";
//   alert(name+' marked for deletion');
}