Javascript 读取Cookie会给出奇怪的格式

我正在尝试读取名为Pdf的cookie，它具有以下值

http://engine.edocbuilder.com/include/fileDownload-aspx?p=xBfpz3UGPkWamLTDILo%2fWbFqh3FomdYuByiTwfB4RXN0sDN6tY%2fDfxJzzfPZblUl5aSBO3v96%2bJ6acwT7L5oi8tyMuGwKshYtGK%2bfhgiSfM%3d&s=4995b496-e735-4a26-9801-253a34ab0481 http://engine.edocbuilder.com/include/fileDownload-aspx?p=xBfpz3UGPkWamLTDILo%2fWbFqh3FomdYuByiTwfB4RXN0sDN6tY%2fDfxJzzfPZblUl5aSBO3v96%2bJ6acwT7L5oi8tyMuGwKshYtGK%2bfhgiSfM%3d&s=4995b496-e735-4a26-9801-253a34ab0481 但是当我阅读这个cookie时，我得到了以下格式的值，你能告诉我关于它的解决方案吗？ s=a4823a90%2D80e6%2D4006%2D909c%2D69d567f2d318&http%3A%2F%2Fengine%2Eedocbuilder%2Ecom%2Finclude%2FfileDownload%2Easpx%3Fp=%2BRj53ETGUI%2FeK7H8yo2Zj%2F6z9Ggmk4VEgmPEtoA2NPDhomzjaYvk2wkh0OZzWt8OtDcATY%2BknqGG8AuxddA6LWccWAfbQgtI0dlVkWevheg%3D s=a4823a90%2D80e6%2D4006%2D909c%2D69d567f2d318和http%3A%2F%2Engine%2EdocBuilder%2Ecom%2Include%2FileDownload%2AspX%3Fp=%2BRj53ETGUI%2Fek7H8YO2ZZ2F6Z9GGMK4VEGMPETO2PDHOMZJAYVK2WKH0OZZWT8OTDCATY%2BKNQGG8AUXDDA6WCCWAFBQGTI0DLVKWEVGHEG%3D

以下是读取cookie的代码：

var i,x,y,ARRcookies=document.cookie.split(";");
for (i=0;i<ARRcookies.length;i++)
{
     x=ARRcookies[i].substr(0,ARRcookies[i].indexOf("="));
     y=ARRcookies[i].substr(ARRcookies[i].indexOf("=")+1);
     x=x.replace(/^\s+|\s+$/g,"");
     if (x==c_name)
     {
         return unescape(y);
     }
 }

var i，x，y，ARRcookies=document.cookie.split（“；”）；
对于（i=0；i，cookie包含URL编码的数据。用于解码字符串：

var cookie = "s=a4823a90%2D80e6%2D4006%2D909c%2D69d567f2d318&http%3A%2F%2Fengine%2Eedocbuilder%2Ecom%2Finclude%2FfileDownload%2Easpx%3Fp=%2BRj53ETGUI%2FeK7H8yo2Zj%2F6z9Ggmk4VEgmPEtoA2NPDhomzjaYvk2wkh0OZzWt8OtDcATY%2BknqGG8AuxddA6LWccWAfbQgtI0dlVkWevheg%3D"
// Find starting position of "http" and retrieve the URL from there
var unEscapedURL = unescape(cookie.substring(cookie.indexOf("http"), cookie.length));

​以下是。
cookie包含URL编码的数据。用于解码字符串：

var cookie = "s=a4823a90%2D80e6%2D4006%2D909c%2D69d567f2d318&http%3A%2F%2Fengine%2Eedocbuilder%2Ecom%2Finclude%2FfileDownload%2Easpx%3Fp=%2BRj53ETGUI%2FeK7H8yo2Zj%2F6z9Ggmk4VEgmPEtoA2NPDhomzjaYvk2wkh0OZzWt8OtDcATY%2BknqGG8AuxddA6LWccWAfbQgtI0dlVkWevheg%3D"
// Find starting position of "http" and retrieve the URL from there
var unEscapedURL = unescape(cookie.substring(cookie.indexOf("http"), cookie.length));

​以下是。
只需使用本机的
decodeURIComponent
方法即可恢复正确的格式：

return decodeURIComponent(y);


“问题”在于编写cookie的代码，它是出于某种原因编写的编码。
只需使用本机的
decodeURIComponent
方法就可以恢复正确的格式：

return decodeURIComponent(y);


“问题”在于编写cookie的代码中，它是出于某种原因编写的。
要读取和写入cookie，请使用此函数：

function setCookie(c_name, value, expiredays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString() + "; path=/");
}
function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) 
                c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return "";
}

要读取和写入cookie，请使用此函数：

function setCookie(c_name, value, expiredays) {
    var exdate = new Date();
    exdate.setDate(exdate.getDate() + expiredays);
    document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString() + "; path=/");
}
function getCookie(c_name) {
    if (document.cookie.length > 0) {
        c_start = document.cookie.indexOf(c_name + "=");
        if (c_start != -1) {
            c_start = c_start + c_name.length + 1;
            c_end = document.cookie.indexOf(";", c_start);
            if (c_end == -1) 
                c_end = document.cookie.length;
            return unescape(document.cookie.substring(c_start, c_end));
        }
    }
    return "";
}