Hi,
Maybe my code snip is not complete enough. The loginServlet and handler servlet
are on the different server, that is I call them
by:http://server1.com/servlet/loginServlet and
http://server2.com/servlet/handlerServlet.
In loginServlet, I have created the session and put user login information in
session:
loginServlet:
doGet(HttpServletRequest req,HttpServletResponse resp) throws ServletException
{
HttpSession session=req.getSession(true);
//read login parameter and validate it
.....
session.putValue("userid",userid);
....
}
In handlerServlet, I read loginServlet's session by:
{
URL url=new
URL("http://server1.com/servlet/loginServlet?userid=test&password=test");
URLConnection conn = url.openConnection();
HttpURLConnection httpConn = (HttpURLConnection) conn;
String cookieHeader = httpConn.getHeaderField("set-cookie");
String lastCookie="";
if(cookieHeader != null) {
int index = cookieHeader.indexOf(";");
if(index >= 0)
lastCookie = cookieHeader.substring(0, index);
}
.....
}
Then send this cookie to updateServlet by the code snip I posted already. Does
Mukhar mean I should create session in handlerServlet? Please help me. Thanks.
Kevin Mukhar wrote:
> No, that's not correct.
>
> "Srini Sathya." wrote:
> > when u have already created a session and want to u that session in ur
> > future pages, use
> >
> > req.getSession(false)//Pls Note here false instead of true.
>
> Using either true or false should not affect whether a previously created
> session is returned by the getSession method. If a session was previously
> created, getSession will always return the existing session (assuming it has not
> timed out and the session id was correctly passed by the client). If a session
> was not previously created, then getSession(true) will create a new session,
> getSession(false) will return null.
>
> I suspect that the problem of the original poster is that the session id is not
> being passed correctly. The code snippet does not seem complete enough to
> determine what is going on. Either the handler servlet or the login servlet
> needs to create the session. The code does not show that occuring. After the
> session is created, the servlet container normally manages passing the session
> id to the browser (assuming the browser is accepting cookies). When the client
> next calls handler servlet, it will pass the session id back, allowing the
> handler servlet to get the correct session. Assuming updateServlet is on the
> same server, the same should hold true to updateServlet.
>
> K Mukhar
>
> "Srini Sathya." wrote:
> >
> > when u have already created a session and want to u that session in ur
> > future pages, use
> >
> > req.getSession(false)//Pls Note here false instead of true.
> >
> > >From jsdk2.1 docs
> > ------------------
> >
> > --Start of Snip--
> > Returns the current HttpSession associated with this request or, if
> > necessary, creates a new session
> > for the request. Use true for create to create a new session, or false to
> > return the current HttpSession.
> >
> > If create is false and the request has no valid HttpSession, this method
> > returns null.
> >
> > To make sure the session is properly maintained, you must call this method
> > at least once before you
> > write any output to the response. Newly created sessions (that is, sessions
> > for which
> > HttpSession.isNew returns true) do not have any application-specific state.
> >
> > Parameters:
> > true - to create a new session for this request; false to return the
> > current session
> > Returns:
> > the HttpSession associated with this request or null if create is
> > false and the request has no
> > valid session
> >
> > --End of Snip--
> > Hope this helps
> > Srini
> >
> > -----Original Message-----
> > From: tong rong [mailto:[EMAIL PROTECTED]]
> > Sent: Monday, July 31, 2000 11:54 AM
> > To: [EMAIL PROTECTED]
> > Subject: session tracking problem in doGet
> >
> > Hi,
> > I am writing a servlet handler program. The process is: when user login,
> > my
> > handler servlet read login information and pass them to loginServlet, save
> > loginServlet's sessionId and display result. Then user can edit his account
> > through Get method of 'updateServlet '. My handler servlet will pass
> > loginServlet's sessionId to updateServlet.
> > But when I use req.getSession(true) in updateServlet, what I got is
> > different with the sessionid i sent. Please help me.
> > Here is my code:
> >
> > handlerServlet:
> > public sendGetData(String lastCookie)
> > {
> > URL url=new URL("/servlet/updateServlet?Change=add");
> > URLConnection con = url.openConnection();
> > con.setDoInput(true);
> > con.setUseCaches(false);
> > if(lastCookie!=null)
> > con.setRequestProperty("cookie", lastCookie);
> >
> > InputStream in = con.getInputStream();
> > Reader reader = new InputStreamReader(in);
> > this.reader = new BufferedReader(reader);
> > }
> >
> > updateServlet:
> > doGet()
> > {
> > HttpSession session=req.getSession(true) ;
> > String sessionId=session.getId();
> > ....
> > }
> >
> > Thanks in advance
> >
> > rachel
>
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