Server side redirect with 4.5.1 and Netscape Enterprise Server

Question

          Is it possible to have a servlet running under WL 4.5.1 to perform a server
          side redirect ala CGI?
          Here's my config:
          web server: Netscape Enterprise Server 3.6 on solaris, with weblogic
          plugin
          servlet runner: WL 4.5.1 on different host from ES.
          Here's what I want to happen:
          1) HTTP GET from browser to enterprise server
          2) forwarded by plugin to servlet
          3) servlet logs some activity to an application log file, and sends a
          server side redirect to enterprise server
          4) Enterprise server returns the file identified by the rediect directly
          to the client.
          This is possible with enterprise server and CGI, because the ES CGI code
          checks the return stream from the CGI program for "Location: <some url>". If
          it see's that, it tries to locally resolve that URL as the client had asked
          directly for that URL. I think this would only be possible with WL if the WL
          NSAPI plug in supported a server side redirect feature. Anyone know status
          of that? Or might ES support something like this depending on the order of
          the objects in obj.conf?
          Here's what I've tried in the servlet:
          res.setHeader("Location:", location);
          res.setContentType("magnus-internal/redirect");
          res.setStatus(302);
          This just sends an HTTP tempoary new location to the client for a client
          side redirect. Client side redirect is not desirable because it doubles the
          HTTP traffic.
          Another option would be to read the file I want to redirect to from inside
          the servlet and return it from the servlet, but that is not desirable
          because I want to have ES serve the file - thats it's job, it caches, less
          network traffic (between our servers), etc.
          Server side redirect is very useful feature and not that uncommon for web
          applications, so if WL does not support it now, I will probably put in a new
          feature request.
          Thanks for your help
          Mark Johnson.
          

Answer 1

Why not just use the proxy servlet to redirect to your netscape server? That
          does it on the server side!
          -russell
          Mark Johnson wrote:
          > I belive that sendRedirect performs a client side rediret, not a server
          > side redirect.
          >
          > Guy Tal <[email protected]> wrote in message
          > news:[email protected]...
          > > public void doGet(HttpServletRequest req, HttpServletResponse res) ...
          > > ...
          > > res.sendRedirect("http://destination");
          > > ...
          > >
          > > Guy
          > >
          > > Mark Johnson <[email protected]> wrote:
          > >
          > > > Is it possible to have a servlet running under WL 4.5.1 to perform a
          > server
          > > > side redirect ala CGI?
          > >
          > > > Here's my config:
          > > > web server: Netscape Enterprise Server 3.6 on solaris, with weblogic
          > > > plugin
          > > > servlet runner: WL 4.5.1 on different host from ES.
          > >
          > > > Here's what I want to happen:
          > > > 1) HTTP GET from browser to enterprise server
          > > > 2) forwarded by plugin to servlet
          > > > 3) servlet logs some activity to an application log file, and sends
          > a
          > > > server side redirect to enterprise server
          > > > 4) Enterprise server returns the file identified by the rediect
          > directly
          > > > to the client.
          > >
          > > > This is possible with enterprise server and CGI, because the ES CGI code
          > > > checks the return stream from the CGI program for "Location: <some
          > url>". If
          > > > it see's that, it tries to locally resolve that URL as the client had
          > asked
          > > > directly for that URL. I think this would only be possible with WL if
          > the WL
          > > > NSAPI plug in supported a server side redirect feature. Anyone know
          > status
          > > > of that? Or might ES support something like this depending on the order
          > of
          > > > the objects in obj.conf?
          > >
          > > > Here's what I've tried in the servlet:
          > > > res.setHeader("Location:", location);
          > > > res.setContentType("magnus-internal/redirect");
          > > > res.setStatus(302);
          > >
          > > > This just sends an HTTP tempoary new location to the client for a client
          > > > side redirect. Client side redirect is not desirable because it doubles
          > the
          > > > HTTP traffic.
          > >
          > > > Another option would be to read the file I want to redirect to from
          > inside
          > > > the servlet and return it from the servlet, but that is not desirable
          > > > because I want to have ES serve the file - thats it's job, it caches,
          > less
          > > > network traffic (between our servers), etc.
          > >
          > > > Server side redirect is very useful feature and not that uncommon for
          > web
          > > > applications, so if WL does not support it now, I will probably put in a
          > new
          > > > feature request.
          > >
          > >
          > > > Thanks for your help
          > >
          > > > Mark Johnson.
          > >
          > >
          > >
          > >
          > >
          > >
          > >
          > >
          Russell Castagnaro
          Chief Mentor
          SyncTank Solutions
          http://www.synctank.com
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