iOS Safari / Chrome中的Cookie持久性

问题描述

当我关闭并重新打开iOS Safari（和Chrome）上的浏览器时，我的持久性cookie被删除。我在iOS 11上，但也在iOS10 / 9上进行了测试。 Cookies可以在Android和台式机上正常存在。奇怪的是，它在iOS上的Firefox上运行良好。

My persistent cookies are being deleted when I close and reopen the browser on iOS Safari (and Chrome). I'm on iOS 11, but have tested on iOS10/9 also. The cookies persist correctly on Android and desktop. And strangely, it works fine for Firefox on iOS.

我在这里缺少什么？

这是我的javascript代码设置cookie和到期日期：

Here is my javascript code the sets the cookie and expire date:

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

  setCookie("test", "random test value", 365);

推荐答案

我刚刚遇到了Cookie被在生产服务器上进行测试时，在Android /桌面设备上保持持久，但在iOS11上不持久。解决方案似乎是在定义Cookie的域：

I've just come across this problem with cookies being persistent on Android / Desktop devices but not on iOS11 when tested on a production server. The solution seemed to be defining the domain of the cookie:

  setCookie = function(cname, cvalue, exdays) {
     var d = new Date();
     d.setTime(d.getTime() + (exdays*24*60*60*1000));
     var expires = "expires="+ d.toUTCString();
     document.cookie = cname + "=" + cvalue + ";" + expires + ";domain=" + window.location.hostname + ";path=/";
  }

  setCookie("test", "random test value", 365);

iOS11在接受cookie方面似乎更受限制。我发现很多营销模糊之处在于它对于隐私保护更好，但是根据新的限制，关于如何正确实施事物（例如，永久登录/ SSO）的技术细节很少。谁能推荐任何有用的链接？

iOS11 seems to be much more locked down in terms of what cookies it accepts. I can find lots of marketing blurb about it being better for privacy but very little technical detail about how to implement things (e.g. persistent login / SSO) properly in light of the new restrictions. Can anyone recommend any useful links?

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