JS操作Cookies和headers

JS操作Cookies

获取Cookie

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 ""
}

 

设置Cookie

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())
}

 

测试Cookie

function checkCookie()

{
　　username=getCookie('username')
　　if (username!=null && username!="") {
　　　　alert('Welcome again '+username+'!')
　　}
　　else {
 　　username=prompt('Please enter your name:',"")
 　　if (username!=null && username!="") {
   　　setCookie('username',username,365)
   　}
　　}
}

 

JS操作Cookies

设置header，不知道为啥不能全局设置

function setHeader(name, value){
    var req = new XMLHttpRequest();
    req.open('GET', document.location, false);
    name && req.setRequestHeader(name, value)
    req.send(null);
}

 

获取header

function getHeader(name){
    var req = new XMLHttpRequest();
    req.open('GET', document.location, false);
    req.send(null);
    return name && req.getResponseHeader(name) || req.getAllResponseHeaders();
}