如何在Flash中访问Cookie？

如果要访问HTTP cookie,则需要使用ExternalInterface来与JavaScript进行通信.我们这样做的方式是有一个名为HTTPCookies的帮助类.

HTTPCookies.as：

import flash.external.ExternalInterface;

public class HTTPCookies
{
    public static function getCookie(key:String):*
    {
        return ExternalInterface.call("getCookie",key);
    }

    public static function setCookie(key:String,val:*):void
    {
        ExternalInterface.call("setCookie",key,val);
    }
}

您需要确保使用Flash对象中的“allowScriptAccess”参数启用JavaScript.

那么你需要创建一对javascript函数getCookie和setCookie,如下(感谢quirksmode.org)

HTTPCookies.js：

function getCookie(key)
{
    var cookieValue = null;

    if (key)
    {
        var cookieSearch = key + "=";

        if (document.cookie)
        {
            var cookieArray = document.cookie.split(";");
            for (var i = 0; i < cookieArray.length; i++)
            {
                var cookieString = cookieArray[i];

                // skip past leading spaces
                while (cookieString.charAt(0) == ' ')
                {
                    cookieString = cookieString.substr(1);
                }

                // extract the actual value
                if (cookieString.indexOf(cookieSearch) == 0)
                {
                    cookieValue = cookieString.substr(cookieSearch.length);
                }
            }
        }
    }

    return cookieValue;
}

function setCookie(key,val)
{
    if (key)
    {
        var date = new Date();

        if (val != null)
        {
            // expires in one year
            date.setTime(date.getTime() + (365*24*60*60*1000));
            document.cookie = key + "=" + val + "; expires=" + date.toGMTString();
        }
        else
        {
            // expires yesterday
            date.setTime(date.getTime() - (24*60*60*1000));
            document.cookie = key + "=; expires=" + date.toGMTString();
        }
    }
}

一旦您的Flash项目中有HTTPCookies.as,并从您的网页加载了HTTPCookies.js,您应该可以从Flash影片中调用getCookie和setCookie来获取或设置HTTP Cookie.

这只适用于非常简单的值 – 字符串或数字 – 但是对于任何更复杂的事情,您应该使用SharedObject.