ramdurs kanakangi wrote:
> Hi, I've a simple question.
>
> Since a HttpSession is maintained between a
> client IP & a server IP, how does it work in case
> of the client being behind a firewall/proxy server?
>
Technically, it is not actually based on client IP and server IP. That would fail
in your proxy case, but also in the case of a multi-user system with independent
client users running their own browsers.
>
> Scenario: lets say we have 2 clients C1 & C2 whose
> requests are routed throught their proxy server P to
> an external webserver W.
>
> In this scenario, does W have just one HttpSession
> with P (for both C1 & C2)?
>
> Or, does W use some other info (like cookies) to
> maintain seperate HttpSessions for C1 & C2?
>
How sessions are maintained is described in the Servlet API Specification,
available at <http://java.sun.com/products/servlet/download.html>. Basically,
there are two choices:
* Use cookies (which means your proxy case will work
as long as the proxy faithfully passes on the appropriate
cookies in each direction)
* Use URL rewriting, which modifies the hyperlinks that
refer to various pages in the application to include the
session id.
>
> Thx, Ram.
>
Craig McClanahan
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