jsp p3p跨域设置cookie

最新推荐文章于 2023-02-28 14:50:50 发布

最新推荐文章于 2023-02-28 14:50:50 发布 · 241 阅读

文章标签：

本文介绍了一种使用JSP实现跨域设置Cookie的方法。通过修改hosts文件及设置P3P策略，实现了不同域名间的Cookie共享，并提供了示例代码验证跨域功能。

网上现在有很多关于跨域设置cookie的文章，但大多数都是php的文章，网上仍然有很多关于jsp p3p的设置，但是必须要将浏览器的隐私设置成低才可以跨域设置cookie.查了n多文章发现他们都搞错了！(真郁闷死了，自己没有解决干什么要贴在自己的博客中？！害得我好惨！^@^)
下面是一个例子:
首先在hosts文件中设置（其中的192.168.73.1为您本机的ip,我写成127.0.0.1不行，可能是公司的域的设置问题）
192.168.73.1 www.a.com
192.168.73.1 www.b.com
[1]编写文件
b_setcookie.jsp

<%@ page contentType= "text/html; charset=utf-8" %>
<%
response.addHeader( "Cache-Control" , "no-cache" );
response.addHeader( "Expires" , "Thu, 01 Jan 1970 00:00:01 GMT" );
String ssocookie= "www.sso12345678910.com" ;
%>
<script src= "http://www.a.com/mp/test/a_setcookie.jsp?id=<%=ssocookie%>" >
</script>

<%@ page contentType="text/html; charset=utf-8" %>
<% 
   response.addHeader("Cache-Control", "no-cache");
   response.addHeader("Expires", "Thu, 01 Jan 1970 00:00:01 GMT"); 
   String ssocookie="www.sso12345678910.com";
 %>
<script src="http://www.a.com/mp/test/a_setcookie.jsp?id=<%=ssocookie%>">
</script>

a_setcookie.jsp

<%
response.setHeader( "P3P" , "CP=\"CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR\"" );
String domainId=request.getParameter( "id" );
Cookie _cookie= new Cookie( "test" ,domainId);
_cookie.setMaxAge( 30 * 60 * 100 );
_cookie.setPath( "/" );
response.addCookie(_cookie);
%>

<%
response.setHeader("P3P","CP=\"CURa ADMa DEVa PSAo PSDo OUR BUS UNI PUR INT DEM STA PRE COM NAV OTC NOI DSP COR\"");
String domainId=request.getParameter("id");
Cookie _cookie=new Cookie("test",domainId);
_cookie.setMaxAge(30*60*100); 
_cookie.setPath("/");
response.addCookie(_cookie);
%>

a_getcookie.jsp

<%@ page contentType= "text/html; charset=utf-8" %>
<%
Cookie cookies[]=request.getCookies(); // 将适用目录下所有Cookie读入并存入cookies数组中
Cookie sCookie= null ;
String sname= null ;
String name= null ;
if (cookies== null ) // 如果没有任何cookie
out.print( "none any cookie" );
else
{
out.print(cookies.length + "<br>" );
for ( int i= 0 ;i<cookies.length; i++) // 循环列出所有可用的Cookie
{
sCookie=cookies[i];
sname=sCookie.getName();
name = sCookie.getValue();
out.println( "comment==>>>" +sCookie.getComment()+ "\n" );
out.println( "getDomain==>>>" +sCookie.getDomain()+ "\n" );
out.println( "getSecure==>>" +sCookie.getSecure()+ "\n" );
out.println( "getVersion==>>" +sCookie.getVersion()+ "\n" );
out.println( "cookiename==>>" +sname + "->" + "cookievalue==>>>" +name + "<br>" );
}
}
%>

<%@ page contentType="text/html; charset=utf-8" %>
<%
   Cookie cookies[]=request.getCookies(); // 将适用目录下所有Cookie读入并存入cookies数组中
 
   Cookie sCookie=null; 
   String sname=null;
   String name=null;
   if(cookies==null) // 如果没有任何cookie
     out.print("none any cookie");
   else
   {
     out.print(cookies.length + "<br>");
     for(int i=0;i<cookies.length; i++) // 循环列出所有可用的Cookie
     {
       sCookie=cookies[i];
       sname=sCookie.getName();
       name = sCookie.getValue();
       out.println("comment==>>>"+sCookie.getComment()+"\n");
       out.println("getDomain==>>>"+sCookie.getDomain()+"\n");
       out.println("getSecure==>>"+sCookie.getSecure()+"\n");
       out.println("getVersion==>>"+sCookie.getVersion()+"\n");
       out.println("cookiename==>>"+sname + "->" + "cookievalue==>>>"+name + "<br>");
     }
   } 
%>

测试时依次请求
http://www.b.com/mp/test/b_setcookie.jsp
http://www.a.com/mp/test/a_getcookie.jsp
便可看到通过跨域设置的cookie的值！