SSO-cookie操作

   在操作cookie的过程中走了一些弯路,cookie是不能跨域的,不过网上搜索到的函数,貌似能够跨域。于是在IE6和maxthon1.6上不断尝试,终于以失败告终.

 

<script type="text/javascript">

   function setCookie(name,value,expiry,path,domain){

   var nameString = name +"='"+ value+"'";

   var expiryString = (expiry == null)?"" : ";expires ='" + expiry.toGMTString()+"'";

   var pathString = (path == null) ? "":";path ='" + path+"'";

   var domainString = (domain == null)?" ":";domain ='" + domain+"'";
  
   var cookies=nameString + expiryString + pathString + domainString;
  
   document.cookie = cookies;
   }

</script>

  上述函数中,如果传入了domain和path的值,cookie都设置不成功:

       var d=new Date(2008,12,31);
       setCookie("test","test",d,"/ExampleApp",null);
       setCookie("test2","test2",d,"/help",null);
       setCookie("test2","test3",d,"/help",www.test.com.cn);

       //-------------------------------

      setCookie("test4","test4",d,null,null);

 java的servlet中也是如此:   

   Cookie test5=new Cookie("test5","test1");
    test5.setDomain("www.test1.com.cn");
    test5.setPath("/help") ;
    test5.setMaxAge(24*60*60);
    response.addCookie(test5) ;
 
    Cookie test6=new Cookie("test6","test6");
    test6.setDomain(request.getServerName());
    test6.setPath(request.getServletPath()) ;
    test6.setMaxAge(24*60*60);
    response.addCookie(test6) ;
    //---------------------------
    Cookie test7=new Cookie("test7","test7");
    test7.setMaxAge(24*60*60);
    response.addCookie(test7) ;

    Cookie test8=new Cookie("test8","test8");
    test8.setMaxAge(24*60*60);
    response.addCookie(test8) ;

   设置了path和domain也没有报错,但是这个cookie就没有了。因此上述语句只成功设置了test4、test7、test8这三个cookie的值.下面是后台可以读取到的cookie的各个属性的值,等号前面是属性名称,等号后面是属性的值.:

 DEBUG (CookieServlet.java:29) -  name=test4,value='test4',domain=null,path=null
 DEBUG (CookieServlet.java:29) -  name=test7,value=test7,domain=null,path=null
 DEBUG (CookieServlet.java:29) -  name=test8,value=test8,domain=null,path=null
 DEBUG (CookieServlet.java:29) -  name=JSESSIONID,value=1ABAF39C37AD75BAE09435DE45239AEA,domain=null,path=null

这份代码应该是正确的了 :-)

/**
 * setCookie
 * 如果多次调用，每次传入不同的sName，就可设置多个cookie的值
 */
function setCookie(sName,sValue,dExpiry){
   var sNameString = sName +"="+escape(sValue);
   var sExpiryString = (dExpiry == null)?"":";expires =" + dExpiry.toGMTString();
 
   document.cookie = sNameString + sExpiryString ;
}

// Retrieve the value of the cookie with the specified name.
function getCookie(sName){
  // cookies are separated by semicolons
  var aCookie = document.cookie.split(";");
  for (var i=0; i < aCookie.length; i++){
     // a name/value pair (a crumb) is separated by an equal sign
     var aCrumb = aCookie[i].split("=");
     if (sName == aCrumb[0])
        return unescape(aCrumb[1]);
   }
  // a cookie with the requested name does not exist
  return null;
}

// Delete the cookie with the specified name.
function delCookie(sName){
   var sValue="delete";
   document.cookie = sName + "=" + escape(sValue) + "; expires=Fri, 31 Dec 1999 23:59:59 GMT;";
}