Cross-origin cookie sharing

From: http://www.cnblogs.com/Ihaveadream/archive/2008/05/02/1178538.html

Note the following three attributes of a cookie:
1. Domain domain
2. Path
3. expires expiration time

For cross-origin operations, you need to set the domain attributes:
Response. Cookies ("mycookie"). Domain = "cnblogs.com"; (this refers to a wildcard domain name)
In this way, access is available under other second-level domain names, and ASP. NET pass the test.

Access under the virtual directory:
I did a test on ASP, but I did not try. net. If the path attribute is not specified, Cookies cannot be shared under different virtual directories.
Set response. Cookies ("mycookie"). Path = "/".

General statement:
Response. Cookies ("mycookie"). Domain = "cnblogs.com ";
Response. Cookies ("mycookie"). Path = "/"
Response. Cookies ("mycookie"). expires = now + 365;
Response. Cookies ("mycookie") ("test") = "test ";

. Net clear cookie

1 httpcookie cookie = system. Web. httpcontext. Current. Request. Cookies [cookiename];
2 If (cookie! = NULL)
3 {
4 cookie. Values. Clear ();
5 setusercookieexpiretime (cookiename,-1 );
6 cookie. Domain = _ domain;
7 system. Web. httpcontext. Current. response. Cookies. Set (cookie );
8}
9 public static void setusercookieexpiretime (string key, int days)
10 {
11 system. Web. httpcontext. Current. response. Cookies [Key]. Domain = _ domain;
12 system. Web. httpcontext. Current. response. Cookies [Key]. Path = _ cookiepath;
13 system. Web. httpcontext. Current. response. Cookies [Key]. expires = datetime. Now. adddays (days );
14}
15

. NET add/update cookies

1 public static void addusercookies (string key, string value, string cookiename, string domain)
2 {
3 httpcookie cookie = system. Web. httpcontext. Current. Request. Cookies [cookiename];
4 If (cookie = NULL)
5 {
6 cookie = new httpcookie (cookiename );
7 cookie. Domain = domain;
8 cookie. Path = _ cookiepath;
9
10 cookie. Values. Add (Key, value );
11 httpcontext. Current. response. appendcookie (cookie );
12}
13 else
14 {
15 if (system. Web. httpcontext. Current. Request. Cookies [cookiename]. Values [Key]! = NULL)
16 {
17 cookie. Values. Set (Key, value );
18}
19 else
20 {
21 cookie. Domain = domain;
22 cookie. Path = _ cookiepath;
23
24 cookie. Values. Add (Key, value );
25 httpcontext. Current. response. appendcookie (cookie );
26}
27}
28}
29