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how to set and get header info?

sachin yadav
Ranch Hand

Joined: Nov 24, 2005
Posts: 156
hi,


i want to put following in my one.jsp

response.setHeader("User", "admin");

and then the page will be redirected to two.jsp, where i am extracting this info.

String uname=request.getHeader("User");

but in two.jsp i am getting anull value for uname. what should i do?
Christophe Verré
Sheriff

Joined: Nov 24, 2005
Posts: 14687
    
  16

This won't solve your problem but

1. You're setting a response header, maybe forwarding to another jsp file, and getting the request headers. That does not make much sense.

2. It does not sound appropriate to use http headers for this. Why don't you
use request attributes ?


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Ramesh Sankar
Greenhorn

Joined: Mar 30, 2006
Posts: 8
use request.setAttribute("user","admin");
or request.setParameter("user","admin");
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18541
    
    8

Setting a request header is not going to work either. Notice that sachin said "the page will be redirected". Redirecting causes the client browser to generate a new request, and the old request disappears.

The usual way to preserve information from one request to the next is to store it in the user's session. If that is not practical then another way to do it is to write the information out into hidden fields that will be submitted as part of the next request; for a redirect, this means something like appending "?User=admin" to the URL being redirected to.
Bear Bibeault
Author and ninkuma
Marshal

Joined: Jan 10, 2002
Posts: 61043
    
  66

Originally posted by Ramesh Sankar:
use ... request.setParameter("user","admin");


There is no such method.


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It is sorta covered in the JavaRanch Style Guide.
 
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