1 /**
2 * 封装cookie的操作
3 * @type {Object}
4 */
5 var CookieUtil = {
6 /**
7 * 根据cookie的名字获取相应的值
8 * @param name cookie名字
9 * @return {*}
10 */
11 get:function (name) {
12 //对name进行URL编码
13 var cookieName = encodeURIComponent(name) + '=',
14 cookieStart = document.cookie.indexOf(cookieName),
15 cookieValue = null;
16 //找到cookieName
17 if (cookieStart > -1) {
18 //以cookieStart为起点找到最近的";"
19 var cookieEnd = document.cookie.indexOf(';', cookieStart);
20 //没找到";"，则是document.cookie的最后一个值
21 if (cookieEnd === -1) {
22 cookieEnd = document.cookie.length;
23 }
24 //提取相应value字段
25 cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
26 }
27 //返回
28 return cookieValue;
29 },
30 /**
31 * 设置一个cookie
32 * @param name cookie名字
33 * @param value 相应的值
34 * @param expire 生存周期 Date
35 * @param path 路径
36 * @param domain 域名
37 * @param secure Boolean
38 */
39 set:function (name, value, expire, path, domain, secure) {
40 //必须先进行URL编码
41 var cookieText = encodeURIComponent(name) + '=' + encodeURIComponent(value);
42 if (expire instanceof Date) {
43 //toGMTString()方法正确格式化Date对象
44 cookieText += '; expire=' + expire.toGMTString();
45 }
46 if (path) {
47 cookieText += '; path=' + path;
48 }
49 if (domain) {
50 cookieText += '; domain=' + domain;
51 }
52 if (secure) {
53 cookieText += '; secure';
54 }
55 document.cookie = cookieText;
56 },
57 /**
58 * 删除cookie
59 * @param name
60 * @param path
61 * @param domain
62 * @param secure
63 */
64 unset:function (name, path, domain, secure) {
65 this.set(name, '', new Date(0), path, domain, secure);
66 }
67 };
68 /*
69 //set cookies
70 CookieUtil.set(“name”, “Nicholas”);
71 CookieUtil.set(“book”, “Professional JavaScript”);
72 //read the values
73 alert(CookieUtil.get(“name”)); //”Nicholas”
74 alert(CookieUtil.get(“book”)); //”Professional JavaScript”
75 //remove the cookies
76 CookieUtil.unset(“name”);
77 CookieUtil.unset(“book”);
78 //set a cookie with path, domain, and expiration date
79 CookieUtil.set(“name”, “Nicholas”, “/books/projs/”, “www.wrox.com”,
80 new Date(“January 1, 2010”));
81 //delete that same cookie
82 CookieUtil.unset(“name”, “/books/projs/”, “www.wrox.com”);
83 //set a secure cookie
84 CookieUtil.set(“name”, “Nicholas”, null, null, null, true);
85 */
86
87 //子cookie的操作
88 //为了绕开浏览器的单域名下的cookie数限制
89 //子cookie是存放在单个cookie中的更小段的数据
90 var SubCookieUtil = {
91 /**
92 * 获取单个子cookie的值
93 * @param name cookie名称
94 * @param subName 子cookie名称
95 * @return {*}
96 */
97 get:function (name, subName) {
98 var subCookies = this.getAll(name);
99 if (subCookies) {
100 return subCookies(subName);
101 } else {
102 return null;
103 }
104 },
105 /**
106 * 获取所有子cookie并将它们放入一个对象中返回
107 * @param name cookie名称
108 * @return {*} 返回对象或null
109 */
110 getAll:function (name) {
111 var cookieName = encodeURIComponent(name) + "=",
112 cookieStart = document.cookie.indexOf(cookieName),
113 cookieValue = null,
114 result = {};
115 if (cookieStart > -1) {
116 var cookieEnd = document.cookie.indexOf(";", cookieName);
117 if (cookieEnd === -1) {
118 cookieEnd = document.cookie.length;
119 }
120 //没有进行解码，因为要对子cookie分离操作
121 cookieValue = document.cookie.substring(cookieStart + cookieName.length, cookieEnd);
122 //
123 if (cookieValue.length > 0) {
124 //分离出子cookie的对象
125 var subCookies = cookieValue.split("&");
126 //遍历分隔出子cookie的名称和值，解码后返回对象
127 for (var i = 0, len = subCookies.length; i < len; i++) {
128 var parts = subCookies[i].split("=");
129 result[decodeURIComponent(parts[0])] = decodeURIComponent(parts[1]);
130 }
131 return result;
132 }
133 }
134 //没找到，返回空
135 return null;
136 },
137 /**
138 * 存储单个子cookie
139 * @param name cookie名称
140 * @param subName 子cookie名称
141 * @param value 子cookie值
142 * @param expires 失效日期
143 * @param path 路径
144 * @param domain 域名
145 * @param secure Boolean安全作用域
146 */
147 set:function (name, subName, value, expires, path, domain, secure) {
148 //获取name名称的所有子cookie，没有则创建空对象
149 var subcookies = this.getAll(name) || {};
150 //给对象添加属性和值
151 subcookies[subName] = value;
152 //调用setAll()方法
153 this.setAll(name, subcookies, expires, path, domain, secure);
154 },
155 /**
156 * 存储所有子cookie
157 * @param name cookie名称
158 * @param subcookies 子cookie名称
159 * @param expires 失效日期
160 * @param path 路径
161 * @param domain 域名
162 * @param secure Boolean安全作用域
163 */
164 setAll:function (name, subcookies, expires, path, domain, secure) {
165 var cookieText = encodeURIComponent(name) + "=";
166 //创建数组，用于保存子cookie
167 var subcookieParts = [];
168 //遍历对象属性
169 for (var subName in subcookies) {
170 //如果存在，则把编码后的名称和值保存到数组
171 if (subName.length > 0 && subcookies.hasOwnProperty(subName)) {
172 subcookieParts.push(encodeURIComponent(subName) + "=" + encodeURIComponent(subcookies[subName]));
173 }
174 }
175 //存在子cookie
176 if (subcookieParts.length > 0) {
177 //连接子cookie
178 cookieText += subcookieParts.join("& ");
179 if (expires instanceof Date) {
180 cookieText += ";expires=" + expires.toGMTString();
181 }
182 if (path) {
183 cookieText += ";path=" + path;
184 }
185 if (domain) {
186 cookieText += ";domain=" + domain;
187 }
188 if (secure) {
189 cookieText += ";secure";
190 }
191 } else {
192 //相当于删除cookie操作
193 cookieText += ";expires=" + (new Date(0)).toGMTString();
194 }
195 document.cookie = cookieText;
196 },
197 /**
198 * 删除单个子cookie的名称和值
199 * @param name
200 * @param subName
201 * @param path
202 * @param domain
203 * @param secure
204 */
205 unset:function (name, subName, path, domain, secure) {
206 var subcookies = this.getAll(name);
207 if (subcookies) {
208 //删除对应的属性和值
209 delete subcookies[subName];
210 //重新设置cookie
211 this.setAll(name, subcookies, null, path, domain, secure);
212 }
213 },
214 /**
215 * 删除所有子cookie
216 * @param name
217 * @param path
218 * @param domain
219 * @param secure
220 */
221 unsetAll:function (name, path, domain, secure) {
222 this.setAll(name, null, new Date(0), path, domain, secure);
223 }
224 };
225 /*
226 //assume document.cookie=data=name=Nicholas&book=Professional%20JavaScript
227 //get all subcookies
228 var data = SubCookieUtil.getAll(“data”);
229 alert(data.name); //”Nicholas”
230 alert(data.book); //”Professional JavaScript”
231 //get subcookies individually
232 alert(SubCookieUtil.get(“data”, “name”)); //”Nicholas”
233 alert(SubCookieUtil.get(“data”, “book”)); //”Professional JavaScript”
234
235 //assume document.cookie=data=name=Nicholas&book=Professional%20JavaScript
236 //set two subcookies
237 SubCookieUtil.set(“data”, “name”, “Nicholas”);
238 SubCookieUtil.set(“data”, “book”, “Professional JavaScript”);
239 //set all subcookies with expiration date
240 SubCookieUtil.setAll(“data”, { name: “Nicholas”, book: “Professional JavaScript” },
241 new Date(“January 1, 2010”));
242 //change the value of name and change expiration date for cookie
243 SubCookieUtil.set(“data”, “name”, “Michael”, new Date(“February 1, 2010”));
244
245 //just remove the “name” subcookie
246 SubCookieUtil.unset(“data”, “name”);
247 //remove the entire cookie
248 SubCookieUtil.unsetAll(“data”);
249 */