Re: add authorization header (user/password) before sendRedirect

From:
Daniel Pitts <newsgroup.spamfilter@virtualinfinity.net>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 10 Dec 2009 16:17:22 -0800
Message-ID:
<mcgUm.17987$_b5.17459@newsfe22.iad>
eunever32@yahoo.co.uk wrote:

On Dec 10, 7:35 pm, Daniel Pitts
<newsgroup.spamfil...@virtualinfinity.net> wrote:

euneve...@yahoo.co.uk wrote:

On Dec 7, 8:01 pm, Daniel Pitts
<newsgroup.spamfil...@virtualinfinity.net> wrote:

euneve...@yahoo.co.uk wrote:

So I then tried apache-commons HttpClient which worked(!) but the
JSESSIONID was not present in the returned html which meant any
further http requests returned "user/password not found." Could this
be because the server doesn't think the client supports cookies?
Any suggestions on how to proceed?
I would be happy with the HttpClient if it worked but am concerned
that it may not be future-proof (should the server side change in
future).

HttpClient from the apache-commons is a great toolkit.
Usually, JSESSIONID is set as a cookie. You will probably have to
inspect the response from the downstream server, and re-write the
cookies to match your domain. Then, when you make a request, make sure
that you pass the users cookies to the downstream server.
--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

Hi
Request 1: PC -> Tomcat -> LoadBalancer ->ServerNode
Request 2, 3, 4, 5 etc: PC->LoadBalancer->ServerNode
The arrangement is the first request to RemoteServer is as follows:
HttpClient originates on the Tomcat; html response is streamed into
response to the browser
!Subsequent requests from PC go directly to RemoteServer! Hence
missing cookie.
I know a little more about the issue and the problem is because we're
hitting a load-balancer first
and then a server-node behind the load-balancer.
If we bypass the load-balancer everything works.
However the requirement is to route through the load balancer.
There is a cookie required for the load-balancer which the browser is
not sending.
The jsessionid is okay because that's on the URL
I guess if I can get the Cookie into the browser that might work.
I have tried setting the Cookie in the response but didn't work.
This is the code:
String[] cookieParams = h.getValue().split(";");
String[] currentParam = cookieParams[0].split("=");
Cookie cookie = new Cookie(currentParam[0], currentParam[1]);
cookie.setDomain("load-balancer-host");
response.addCookie(cookie);
Does the setDomain look correct?
Is there an alternative way to test this? For example if jsessionid
can be passed in the URL,
can the cookie for the load-balancer-node also be set on the URL?
Because I did try this but to no avail.
Thoughts suggestions appreciated.

You're server node is going to have to set the cookie, not your original
request to tomcat. The reason is you can't set a cookie on another domain..

Thanks Daniel
If it's not possible to use a cookie, is there any other way to get
the value into the request? Would it be a header or a parameter?

You can not make the client user-agent do anything at all. You can only
intercept and proxy, or redirect. Your cookie should be set by your
server-node. Tomcat could use a redirect to send the client to a
particular URL on your server/load-balancer. The response of *that* URL
should be the one that sets the cookie! Hint, if your Tomcat instance
is the only one that knows the proper value, of the redirect URL contain
a query parameter.

--
Daniel Pitts' Tech Blog: <http://virtualinfinity.net/wordpress/>

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