jQuery写入读取Cookie插件详解

作者：简简单单 2011-12-21

找了下关于jQuery操作cookie的插件,大概的使用方法如下
example $.cookie('the_cookie', 'the_value');
设置cookie的值
example $.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true});
新建一个cookie 包括有效期路径域名等
example $.cookie('the_cookie', 'the_value');
新建cookie
example $.cookie('the_cookie', null);
删除一个cookie

代码如下

复制代码

jQuery.cookie = function(name, value, options) {

if (typeof value != 'undefined') { // name and value given, set cookie

options = options || {};

if (value === null) {

value = '';

options.expires = -1;

}

var expires = '';

if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {

var date;

if (typeof options.expires == 'number') {

date = new Date();

date.setTime(date.getTime() + (options.expires * 24 * 60 * 60 * 1000));

} else {

date = options.expires;

}

expires = '; expires=' + date.toUTCString(); // use expires attribute, max-age is not supported by IE

}

var path = options.path ? '; path=' + options.path : '';

var domain = options.domain ? '; domain=' + options.domain : '';

var secure = options.secure ? '; secure' : '';

document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');

} else { // only name given, get cookie

var cookieValue = null;

if (document.cookie && document.cookie != '') {

var cookies = document.cookie.split(';');

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

var cookie = jQuery.trim(cookies[i]);

// Does this cookie string begin with the name we want?

if (cookie.substring(0, name.length + 1) == (name + '=')) {

cookieValue = decodeURIComponent(cookie.substring(name.length + 1));

break;

}

return cookieValue;

}

};

然后看了下Discuz!中对cookie的操作方法
如下,发现少了个遍历用;分割的数组的处理

代码如下

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function getcookie(name) {

var cookie_start = document.cookie.indexOf(name);

var cookie_end = document.cookie.indexOf(";", cookie_start);

return cookie_start == -1 ? '' : unescape(document.cookie.substring(cookie_start + name.length + 1, (cookie_end > cookie_start ? cookie_end : document.cookie.length)));

}

function setcookie(cookieName, cookieValue, seconds, path, domain, secure) {

var expires = new Date();

expires.setTime(expires.getTime() + seconds);

document.cookie = escape(cookieName) + '=' + escape(cookieValue)

+ (expires ? '; expires=' + expires.toGMTString() : '')

+ (path ? '; path=' + path : '/')

+ (domain ? '; domain=' + domain : '')

+ (secure ? '; secure' : '');

}