Simulate multiple request / response with a HTTP URL

Question

I need to communicate with a servlet. In the first request, the user gets authenticated and a connection is created. Now I need to use this connection to send further requests since all requests undergo an authentication check.
However, when I try to implement the same, the second time I write to the output stream of the connection, I get the following exception:
java.net.ProtocolException: Cannot write output after reading input.
Please help! I need to create an application which communicates with this Servlet in the specified way

Answer 1

Now I need to use this connection to send
further requests since all requests undergo an
authentication check.That's not how HTTP works. For each request, you have
to make a new connection. And as for authentication,
it's perfectly feasible for you to do the
authentication for every single request, but (at
least in the case of basic authentication) browsers
tend to send an Authorization header once they have
done the original authentication dialogue. You could
do that too.Also, underneath it all, HTTP 1.1 tries to maintain a socket connection so you don't have that overhead to deal with each time. But as DrClap says, you need to use fresh HTTP instances each time and set the appropriate session/authentication headers.