SSO-cookie操作

   在操作cookie的過程中走了一些彎路,cookie是不能跨域的,不過網上搜索到的函數,貌似能夠跨域。於是在IE6和maxthon1.6上不斷嘗試,終於以失敗告終.

 

<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>

  上述函數中,如果傳入了domain和path的值,cookie都設置不成功:

       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) ;

   設置了path和domain也沒有報錯,但是這個cookie就沒有了。因此上述語句只成功設置了test4、test7、test8這三個cookie的值.下面是後臺可以讀取到的cookie的各個屬性的值,等號前面是屬性名稱,等號後面是屬性的值.:

 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

這份代碼應該是正確的了 :-)

/**
 * setCookie
 * 如果多次調用，每次傳入不同的sName，就可設置多個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;";
}